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Journal articles on the topic 'Pelvimetry'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2024

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1

Phexell, Erika, Anna Åkesson, Marcus Söderberg, and Anetta Bolejko. "Intra- and inter-rater reliability in a comparative study of cross-sectional and spiral computed tomography pelvimetry methods." Acta Radiologica Open 8, no. 6 (2019): 205846011985518. http://dx.doi.org/10.1177/2058460119855187.

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Background Different low-dose computed tomography (CT) pelvimetry methods can be used to evaluate the size of birth canal before delivery. CT pelvimetry might generate an acceptable low fetal radiation dose but its measurement accuracy is unknown. Purpose To investigate intra- and inter-rater measurement reliability of cross-sectional and two spiral CT pelvimetry methods: standard spiral and short spiral. Material and Methods Ten individuals (age ≥60 years, body mass index ≥30 kg/m2) having a CT scan of the abdomen also had CT pelvimetry scans. Three radiologists made independent measurements of each pelvimetry method on two occasions and also in consensus for a reference pelvimetry computed from the standard-dose CT scan of the abdomen. Inter- and intra-rater reliability was analyzed by intraclass correlation coefficient. Results Measurements in the short spiral pelvimetry demonstrated excellent intra- and inter-rater reliability, intraclass correlation coefficient ≥0.93, and good to excellent 95% confidence interval 0.87–0.99. Corresponding results of the standard spiral and cross-sectional pelvimetry showed good to excellent intraclass correlation coefficient ≥0.85 and ≥0.76, and 95% confidence interval was least good and moderate 0.73–0.98 and 0.59–0.97, respectively. Intraclass correlation coefficient between reference pelvimetry and other CT methods showed analogous results. Conclusion The short spiral pelvimetry demonstrated high and best reliability in comparison to other methods. Standard spiral method showed also good measurement reliability but the short spiral pelvimetry generates lower fetal radiation dose. This method might be suitable for measurements at narrow pelvis. Patient acceptance and attitude to CT pelvimetry should be investigated.

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2

Abou Ghazzeh, Y. M., and R. Barqawi. "An appraisal of computed tomography pelvimetry in patients with previous caesarean section." Eastern Mediterranean Health Journal 6, no. 2-3 (2000): 260–64. http://dx.doi.org/10.26719/2000.6.2-3.260.

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This study was conducted to determine the value of computed tomography [CT] pelvimetry in patients with previous caesarean section. Of 219 pregnant women with one previous caesarean section, 100 had antenatal CT pelvimetry and a control group of 119 women had no CT pelvimetry. In the CT pelvimetry group, 51.0% delivered by caesarean section, 28.0% underwent elective caesarean section for contracted pelvis based on the findings of CT pelvimetry and 23% underwent emergency caesarean section after a trial labour. In the control group, 21.8% underwent emergency caesarean section. The differences in birth weight and Apgar scores between the groups were not statistically significant. CT pelvimetry increased the rate of caesarean delivery, suggesting that CT pelvimetry before a vaginal birth after a previous caesarean delivery is of limited value

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3

Lalèyè, Christel Marie, Simon A. Azonbakin, Vincent Delmas, et al. "CT pelvimetry of variant pelvis and child birth prognosis." Anatomy Journal of Africa 7, no. 2 (2018): 1292–97. http://dx.doi.org/10.4314/aja.v7i2.177638.

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The aim of this study was to determine the threshold values of pelvimetry by scanning and to evaluate the ability of the pelvimetry alone to diagnose a fetal-pelvic disproportion. It was an observational retrospective study on 410 pregnant women who had a scanner pelvimetry for any reasons. Based on the fetal presentations, two subgroups (breech and cephalic -others) have been defined. Measurements of the main obstetric diameters (promonto-retropubic, median transverse and dual sciatica) were taken. The 5th and 10th percentile were calculated as well as the 90th and 95th to determine the threshold values of pelvimetry by scanner. The scanner values found on CT were compared with the standard X ray pelvimetry values. Referring to extreme values obtained by pelvimetry scanner, some pathological pelvic brim were reconstructed in 3D. Moreover, the delivery prognostic was analyzed by crossing the pelvic inlet dimensions (Magnin index) and pelvic outlet dimensions (bi-sciatic diameter) with the outcome of the delivery. The mean values of the scanno-pelvimetry measurement in our series were:m12,39 cm (± 1) for the promonto-retropubic diameter, 12.88 cm (± 1.01) for the transverse median diameter and 11 cm (± 1.32) for the bi-sciatic diameter. These measurements provided an accuracy less than 1 cm compared to the standard ray pelvimetry. Although Magnin index at 23 allows a vaginal delivery, 51% of oursample have failed. Moreover, for the Magnin index at 24 and 25, the vaginal delivery failure rate remains high:45.1% and 39.61% respectively. Compared to classical pelvimetry, pelvimetry by scanner provides additional precision and allows to study the geometry of the basin. However, the pelvimetry alone could not be effective to establish the prognosis of vaginal delivery.Keywords: scanno-pelvimetry, prognosis, delivery

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4

Lotz, H., L. Ekelund, S. O. Hietala, L. Eriksson, D. E. Wiklund, and G. Wickman. "Low Dose Pelvimetry with Biplane Digital Radiography." Acta Radiologica 28, no. 5 (1987): 577–80. http://dx.doi.org/10.1177/028418518702800515.

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The digital moving slit technique as used by most CT scanners for overview images, was used for antero-posterior and lateral views of the pelvis for pelvimetry. The method was evaluated in phantom experiments and clinical examinations were performed in 23 patients. The method was compared with conventional pelvimetry in 14 patients. Estimated ovarian dose was reduced by a factor of 14.2. The discrepancy in measurements of the pelvic diameters by computed tomography compared with conventional pelvimetry was considered to be without practical importance from an obstetric point of view. Digital pelvimetry is easier for the patient, faster and the need for repeated exposures is eliminated. Based on these facts it is suggested that digital pelvimetry should replace the conventional method whenever possible.

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5

Wright, A. R., P. T. English, H. M. Cameron, and J. B. Wilsdon. "MR Pelvimetry — A Practical Alternative." Acta Radiologica 33, no. 6 (1992): 582–87. http://dx.doi.org/10.1177/028418519203300618.

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Pelvimetry remains a useful technique as part of the assessment of the term breech pregnancy where vaginal delivery is planned. MR pelvimetry is accurate, well tolerated and shows soft-tissue structures as well as bone. It avoids the potentially carcinogenic effects of ionising radiation and is thought to be completely safe for mother and fetus. A technique of MR pelvimetry is described which uses gradient-echo sequences. This quick, practical method makes minimal inroads into valuable scanning time, and may therefore be considered a potentially cost-effective alternative to conventional pelvimetry.

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6

Johnson, GC. "Pelvimetry revisited." American Journal of Roentgenology 147, no. 2 (1986): 409–11. http://dx.doi.org/10.2214/ajr.147.2.409.

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7

Yeomans, Edward R. "Clinical Pelvimetry." Clinical Obstetrics and Gynecology 49, no. 1 (2006): 140–46. http://dx.doi.org/10.1097/01.grf.0000198185.94413.0d.

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8

Dixon, A. "Pelvimetry revisited." European Radiology 12, no. 12 (2002): 2833–34. http://dx.doi.org/10.1007/s00330-002-1672-z.

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9

De Amicis, I., L. Stehlik, F. Del Signore, et al. "Pelvimetry in the Teramana goat breed: a comparison between radiography and ultrasound." Veterinární Medicína 64, No. 11 (2019): 476–81. http://dx.doi.org/10.17221/96/2019-vetmed.

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Radiography is routinely used for pelvimetry, but it is not easily accessible for farm animals, while ultrasonographic pelvimetry could be used due to the better accessibility and lack of radiation hazard. Radiographic and ultrasonographic pelvimetry in goats were compared, and three diameters of the pelvis were measured; the narrowest transverse pelvic diameter at the level of the acetabula, from the pecten pubis to the sacral promontorium and from the dorsal edge of the pubis to the coccygeal vertebra. The measurement was performed three times by one observer on both modalities. Intraclass correlation coefficient (ICC) and Bland-Altman analyses were performed. The intraobserver agreement was excellent for all the measurements and modalities in the study. Excellent agreement (ICC 0.96) was achieved for the transverse pelvic diameter. The agreement for the other two diameters was poor. We can conclude that the ultrasonographic pelvimetry of a goat is reliable only in the transverse pelvic diameter just cranial to the pecten pubis.

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10

Lu, Yao Sheng, Wen Bo Wang, and Yao Xiong Huang. "Research of Pelvimetry Based on Electromagnetic Tracker." Advanced Materials Research 346 (September 2011): 607–14. http://dx.doi.org/10.4028/www.scientific.net/amr.346.607.

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Traditional pelvimetry for a pregnant women is mainly relied on a ruler or estimation based on the vaginal touch, which results a very high measuring error. A new pelvimetry based on electromagnetic tracker is proposed in this paper , and a measure system has been developed . It’s a non-invasive method to measure key parameters of a pelvis because of the character of high accuracy, without line-of-sight restrictions and non-radiation of electromagnetic tracking technology. Its precise measuring data can well fulfill clinical pelvimetry needs, and be helpful for a physician to make decisions to go on a vaginal delivery or not during a labor.

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11

Raman, S., D. Samuel, and K. Suresh. "A Comparative Study of X-Ray Pelvimetry and CT Pelvimetry." Australian and New Zealand Journal of Obstetrics and Gynaecology 31, no. 3 (1991): 217–20. http://dx.doi.org/10.1111/j.1479-828x.1991.tb02784.x.

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12

Hêches, Johann, Sandra Marcadent, Anna Fernandez, et al. "Accuracy and Reliability of Pelvimetry Measures Obtained by Manual or Automatic Labeling of Three-Dimensional Pelvic Models." Journal of Clinical Medicine 13, no. 3 (2024): 689. http://dx.doi.org/10.3390/jcm13030689.

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(1) Background: The morphology of the pelvic cavity is important for decision-making in obstetrics. This study aimed to estimate the accuracy and reliability of pelvimetry measures obtained when radiologists manually label anatomical landmarks on three-dimensional (3D) pelvic models. A second objective was to design an automatic labeling method. (2) Methods: Three operators segmented 10 computed tomography scans each. Three radiologists then labeled 12 anatomical landmarks on the pelvic models, which allowed for the calculation of 15 pelvimetry measures. Additionally, an automatic labeling method was developed based on a reference pelvic model, including reference anatomical landmarks, matching the individual pelvic models. (3) Results: Heterogeneity among landmarks in radiologists’ labeling accuracy was observed, with some landmarks being rarely mislabeled by more than 4 mm and others being frequently mislabeled by 10 mm or more. The propagation to the pelvimetry measures was limited; only one out of the 15 measures reported a median error above 5 mm or 5°, and all measures showed moderate to excellent inter-radiologist reliability. The automatic method outperformed manual labeling. (4) Conclusions: This study confirmed the suitability of pelvimetry measures based on manual labeling of 3D pelvic models. Automatic labeling offers promising perspectives to decrease the demand on radiologists, standardize the labeling, and describe the pelvic cavity in more detail.

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13

Li, Juan, Ying Lou, Cheng Chen, et al. "Predictive Value of MRI Pelvimetry in Vaginal Delivery and Its Practicability in Prolonged Labour—A Prospective Cohort Study." Journal of Clinical Medicine 12, no. 2 (2023): 442. http://dx.doi.org/10.3390/jcm12020442.

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Background: Pelvic dimensions are crucial variables in the labour process. We used magnetic resonance imaging (MRI) pelvimetry to predict the probability of vaginal delivery and distinguish the cephalopelvic disproportion risk in women with prolonged active labour. Methods: This prospective cohort study enrolled term nulliparous women willing to undergo MRI pelvimetry and a trial of labour. A nomogram, with vaginal birth as the outcome, was developed and evaluated by calibration curve and decision curve analyses. The pairwise association between maternal and fetal parameters and a prolonged first stage of labour was quantified. Results: Head circumference (HC), abdominal circumference (AC), intertuberous distance (ITD), interspinous diameter (ISD), and body mass index (BMI) were introduced to develop a nomogram with good diagnostic performance (area under the curve = 0.799, sensitivity = 83%, and specificity = 73%). The cephalopelvic index of diameter (CID) in 54 women with a prolonged first stage of labour was much smaller in those who delivered via cesarean section compared with those who delivered vaginally (18.09 ± 1.14 vs. 21.29 ± 1.06; p = 0.046). Conclusions: An MRI pelvimetry-based nomogram may predict the probability of vaginal delivery. Practitioners should reassess the pelvimetry parameters to decide whether the trial of labour should be continued if it is prolonged.

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14

MORRIS, C. W., J. C. P. HEGGIE, and C. M. ACTON. "Computed tomography pelvimetry: Accuracy and radiation dose compared with conventional pelvimetry." Australasian Radiology 37, no. 2 (1993): 186–91. http://dx.doi.org/10.1111/j.1440-1673.1993.tb00047.x.

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15

Dathan-Stumpf, Anne, Massimiliano Lia, Christof Meigen, et al. "Novel Three-Dimensional Body Scan Anthropometry versus MR-Pelvimetry for Vaginal Breech Delivery Assessment." Journal of Clinical Medicine 12, no. 19 (2023): 6181. http://dx.doi.org/10.3390/jcm12196181.

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In this prospective, monocentric study, we investigated the potency of a novel three-dimensional (3D) body scanner for external pelvic assessment in birth planning for intended vaginal breech delivery. Between April 2021 and June 2022, 73 singleton pregnancies with intended vaginal birth from breech presentation (>36.0 weeks of gestation) were measured using a pelvimeter by Martin, a three-dimensional body scanner, and MR-pelvimetry. Measures were related to vaginal birth and intrapartum cesarean section. A total of 26 outer pelvic dimensions and 7 inner pelvic measurements were determined. The rate of successful vaginal breech delivery was 56.9%. The AUC (area under the curve) of the obstetric conjugate (OC) measured by MRI for predicting the primary outcome was 0.62 (OR 0.63; p = 0.22), adjusted for neonatal birth weight 0.66 (OR 0.60; p = 0.19). Of the 22 measured 3D body scanner values, the ratio of waist girth to maternal height showed the best prediction (AUC = 0.71; OR 1.27; p = 0.015). The best predictive pelvimeter value was the distantia spinarum with an AUC of 0.65 (OR = 0.80). The 3D body scanner technique is at least equal to predict successful vaginal breech delivery compared to MRI diagnostics. Further large-scale, prospective studies are needed to verify these results.

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16

von Bismarck, Amanda, Birgit Ertl-Wagner, Sophia Stöcklein, et al. "MR Pelvimetry for Breech Presentation at Term– Interobserver Reliability, Incidental Findings and Reference Values." RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren 191, no. 05 (2018): 424–32. http://dx.doi.org/10.1055/a-0715-2122.

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Purpose Antepartal MR pelvimetry is used to assess the viability of vaginal breech delivery. We evaluated the reliability of MR pelvimetric measurements as well as incidental findings noted by different clinicians and assessed potential reference values. Methods In this monocentric study, the radiologic database was searched for obstetric MR pelvimetries with singleton breech pregnancies between 1999 and 2016. 99 consecutive MR pelvimetries were included. A structured, independent review was performed by six observers with three clinical experience levels (attending, fellow, junior resident from the departments of radiology and obstetrics). Image analysis entailed the quantitative assessment of conjugata vera (CV) and diameter transversalis (DT), image quality and incidental findings. Obstetric data was retrieved from the obstetric database for reference value assessment. Results Interobserver agreement was strong throughout (mean intraclass correlation coefficient range: 0.889 – 0.968). The individual measuring biases ranged between 0 – 2 mm, and the average limits of agreement were ± 3 mm. Regarding the mode of delivery, the recommended cesarean section (rCS) group showed significantly smaller CV measurements (CV: 11.37 ± 0.73, p-value < 0.0001) than any other delivery group. No statistical difference in CV between the vaginal delivery and unplanned cesarean section groups was found (p-value 0.902). DT measurements only showed a significant difference between rCS and elective cesarean section (p-value 0.039). 134 incidental findings were noted. Conclusion Strong interobserver agreement irrespective of the reader’s experience level supports MR pelvimetry as a reliable method for identifying women with fetopelvic disproportion in breech presentation. For a comprehensive appraisal of incidental findings, radiologic expertise is vital. Key points: Citation Format

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17

Bychenko, Bychenko V. G., Kulabukhova E. A. Kulabukhova, Baev O. R. Baev, and Babich D A. Babich D. "Magnetic resonance imaging pelvimetry." Akusherstvo i ginekologiia 9_2021 (September 23, 2021): 190–98. http://dx.doi.org/10.18565/aig.2021.9.190-198.

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18

Gudgeon, C. W., and J. Jarrett. "Pelvimetry — a Squatter's View." Australian and New Zealand Journal of Obstetrics and Gynaecology 31, no. 3 (1991): 221–22. http://dx.doi.org/10.1111/j.1479-828x.1991.tb02785.x.

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19

Edwards, P. D., V. Brown, and P. Wade. "Comparison of pelvimetry techniques." Clinical Radiology 52, no. 9 (1997): 725. http://dx.doi.org/10.1016/s0009-9260(97)80045-1.

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Adam, Ph, Y. Alberge, S. Castellano, M. Kassab, and B. Escude. "Pelvimetry by digital radiography." Clinical Radiology 36, no. 3 (1985): 327–30. http://dx.doi.org/10.1016/s0009-9260(85)80084-2.

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Tukeva, T. A., H. J. Aronen, P. T. Karjalainen, and P. J. Mäkelä. "Low-field MRI pelvimetry." European Radiology 7, no. 2 (1997): 230–34. http://dx.doi.org/10.1007/s003300050141.

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22

Wiesen, E. J., J. R. Crass, E. M. Bellon, G. G. Ashmead, and A. M. Cohen. "Improvement in CT pelvimetry." Radiology 178, no. 1 (1991): 259–62. http://dx.doi.org/10.1148/radiology.178.1.1984315.

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23

Aabid, M., S. Semghouli, and A. Choukri. "Assessment of Computed Tomography Dose Index (CTDI) During CT Pelvimetry Using Monte Carlo Simulation." Atom Indonesia 1, no. 1 (2023): 21–25. http://dx.doi.org/10.55981/aij.2023.1214.

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A pelvimetry examination is sometimes prescribed to a pregnant woman at the end of her pregnancy in order to assess the dimensions of her pelvis prior to childbirth. This examination has long been performed by using X-ray, but is now increasingly being replaced by CT-scan The objective of this study is to assess the radiation doses received during a practical CT pelvimetry examination performed using a Hitashi Supria 16-slice CT scanner. The radiation doses were estimated using Monte Carlo (MC)-based simulation with GATE code to model the 16-slice CT scanner machine. The GATE code operates using GEANT4 libraries. A polyymethyl metacrylate (PMMA) acrylic phantom of 32 cm diameter was modeled to represent the patient's body. X-ray energy spectrum generated using the SRS-78 spectrum processor was used for simulation. The simulation was executed with the same exposure parameters as the practical CT pelvimetry examination with dose parameters of 1 mGy, 0.9 mGy, and 36.6 mGy.cm, respectively, for the weighted CT dose index (CTDIw), the volume CT dose index (CTDIvol), and dose-length product (DLP). The MC simulation results provide dose parameters of 1.16 mGy, 1.07 mGy, and 43.6 mGy.cm, respectively, for the CTDIw, CTDIvol, and DLP. The differences between the simulation and the practical examination were 16 %, 18 %, and 18 %, respectively. These differences are considered in a quite good agreement. The results were also consistent with other similar studies. This work proves that the Monte Carlo simulation with the GATE code is usable to assess the patient doses during a CT pelvimetry examination.

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Vergara-Fernández, Omar, Erick Alejandro Ruiz-Muñoz, Danilo Tueme-de la Peña, Héctor E. Bravo-Ávila, Alejandro Hoyos-Torres, and Noel Salgado-Nesme. "Pelvic Diameter is not Associated with Positive Circumferential Resection Margin in Rectal Cancer: Retrospective Analysis of 78 Cases." Journal of Coloproctology 44, no. 01 (2024): e63-e70. http://dx.doi.org/10.1055/s-0044-1782152.

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Abstract Objective To identify if there is an association between pelvic entry and pelvic outlet diameters with increased positive circumferential resection margin (CRM) in rectal cancer. Introduction Positive CRM in rectal cancer is a major predictor for local and distant recurrence. Pelvic diameters may be related to the difficulty of dissection, as well as intrinsic tumor characteristics such as tumor size, location, distance from the anal margin, and T stage, which may compromise the integrity of the mesorectum and circumferential margin involvement. Methods A retrospective review of the patient's medical records who underwent surgical resection of rectal adenocarcinoma from January 2012 to June 2022 was performed. The patient's preoperative staging, operative characteristics, and histopathologic outcomes were gathered from the medical records. Preoperative MRI scanning was done in all patients. MRI pelvimetry was done by two observers. CRM involvement was recorded as stated in the pathology report. Pelvimetry variables were dichotomized according to their mean values for correlation analysis. The odds ratio (OR) was calculated from a binary logistics regression model to assess the relation between the positive CRM and the independent variables. Results A total of 78 patients were included in this study. A positive CRM was reported in 10 patients (12.8%). BMI >27.4 + 6.6 (p = 0.02), positive extramural vascular invasion (p = 0.027), positive CRM by MRI scanning (p = 0.004), and anal sphincter involvement (p = 0.03) were associated with positive CRM. Pelvimetry values were not associated with a positive CRM. Conclusion No association was found between the pelvic diameters measured by MRI pelvimetry with a positive CRM.

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Aubry, S., P. Padoin, Y. Petegnief, C. Vidal, D. Riethmuller, and E. Delabrousse. "Can three-dimensional pelvimetry using low-dose stereoradiography replace low-dose CT pelvimetry?" Diagnostic and Interventional Imaging 99, no. 9 (2018): 569–76. http://dx.doi.org/10.1016/j.diii.2018.02.008.

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Seyrek Intas, D., G. Yilmazbas, K. Seyrek Intas, et al. "Radiographic pelvimetry and evaluation of radiographic findings of the pelvis in cats with dystocia." Tierärztliche Praxis Ausgabe K: Kleintiere / Heimtiere 36, no. 04 (2008): 277–84. http://dx.doi.org/10.1055/s-0038-1622688.

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Summary Objective: The aim of this study was to determine reference values for pelvic dimensions in radiographically unremarkable native Turkish cats (similar to European Shorthair cats) and to evaluate radiographic findings of the pelvis in cats with dystocia and to compare their pelvimetric measurements with those of radiographically unremarkable cats. Material and methods: Pelvimetry was performed on ventro-dorsal and lateral radiographs of radiographically unremarkable male (n = 34) and female cats (n = 23) with no history of dystocia and cats presented with dystocia. Cats with dystocia were classified in groups according to radiographical findings: cats without obvious radiographical changes, cats with traumatic pelvic stenosis and cats with pelvic narrowing due to metabolic disease. Statistical analyses were performed to find out significant differences between both groups with respect to gender and age. Results: Pelvic dimensions of radiographically unremarkable cats are greater in males compared to females. These differences increase with increasing age, but are not significant in cats older than 2 years. Twenty-five out of 37 queens presented with dystocia had significantly smaller pelvic dimensions compared to radiographically unremarkable queens. Deformation/narrowing of the pelvis in 12 cats (32%) due to old fractures and metabolic bone disease occurred in 7 and 5 cases, respectively. Conclusion: Old, untreated pelvic fractures and metabolic disorders may cause stenosis of the birth canal and dystocia. However, there is a high rate of queens without deformation, but smaller pelvic dimension experiencing dystocia. As 80% of these cats are around 1 year of age they might still be growing or are underdeveloped, despite pelvic physeal growth plates are already closed. Clinical relevance: Pelvic radiographs and pelvimetry before mating enables to identify cats with pelvic narrowing due to traumatic, metabolic, or developmental reasons and may prevent the queen from potential dystocia.

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Stark, DD, SM McCarthy, RA Filly, JT Parer, H. Hricak, and PW Callen. "Pelvimetry by magnetic resonance imaging." American Journal of Roentgenology 144, no. 5 (1985): 947–50. http://dx.doi.org/10.2214/ajr.144.5.947.

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Wright, A. R., P. T. English, H. M. Cameron, and J. B. Wilsdon. "MR Pelvimetry - A Practical Alternative." Acta Radiologica 33, no. 6 (1992): 582–87. http://dx.doi.org/10.3109/02841859209173218.

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Radley, Bettina Böttcher, S. C. "Pelvimetry: changing trends and attitudes." Journal of Obstetrics and Gynaecology 21, no. 5 (2001): 459–62. http://dx.doi.org/10.1080/01443610120071983.

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Wright, A. R., P. T. English, H. M. Cameron, and J. B. Wilsdon. "MR Pelvimetry - A Practical Alternative." Acta Radiologica 33, no. 6 (1992): 582–87. http://dx.doi.org/10.1080/02841859209173218.

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STARK, DAVID D., SHIRLEY M. MCCARTHY, ROY A. FILLY, JULIAN T. PARER, HEDVIG HRICAK, and PETER W. CALLEN. "Pelvimetry by Magnetic Resonance Imaging." Obstetrical & Gynecological Survey 40, no. 10 (1985): 622–23. http://dx.doi.org/10.1097/00006254-198510000-00003.

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Lenhard, Miriam S., Thorsten R. C. Johnson, Sabine Weckbach, Konstantin Nikolaou, Klaus Friese, and Uwe Hasbargen. "Pelvimetry revisited: Analyzing cephalopelvic disproportion." European Journal of Radiology 74, no. 3 (2010): e107-e111. http://dx.doi.org/10.1016/j.ejrad.2009.04.042.

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Pinheiro, L. L., A. R. Lima, P. P. Bombonato, et al. "X-ray pelvimetry in common marmoset (Callithrix jacchus - LINNAEUS, 1758)." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 68, no. 3 (2016): 695–701. http://dx.doi.org/10.1590/1678-4162-8508.

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ABSTRACT The common marmoset is an important Neotropical primate for biomedical research. With the intention of providing pelvimetric values that allow the selection of animals with better characteristics for reproduction, we studied the X-ray of the pelvis, in ventro-dorsal projection of 12 adult animals, six males and six females, belonging to the National Center of Primates - CENP. The measurements were made to right diagonal diameters (RDD), left diagonal diameter (LDD), bi-iliac middle diameter (BIMD), bi-iliac upper diameter (BIUD), bi-iliac lower diameter (BILD), sacrum-pubic diameter (SPD), and the input area of the pelvis (IAP), which were compared in relation to sex and bodily correlated with the biometrics. The results of the means and standard deviations regarding pelvimetry (cm) were: for the RDD in males of 1.91±0.14 and in the females of 2.05±0.08; LDD in males of 1.85±0.16 and in females of 2.03± 0.08; BIMD in males of 1.46±0.12 and in the females of 1.5±0; BIUD showed in males 1.3±0.1 and in females of 1.3±0.06; BILD in males of 1.35±0.15 and in females of 1.25±0.08; SPD in males of 1.68±0.09 and in females of 1.93±0.13; IAP in males of 1.9±0.26 and in the females of 2.23±0.13. It was concluded that the pelvis of Callithrix jacchus could be classified as dolicopelvic type, there is sexual dimorphism in relation to the pelvis of adult animals and that the bodily measurements have low positive correlation with pelvic measurements.

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Sary, Ramadan G., Hisham A. Abdelrahman, Ragab H. Mohamed, Ahmed M. Hussien, Hassan A. Hussein, and Karim M. Khalil. "Relationships between the Parity and Pelvimetry of Egyptian Buffalo Cows: Prediction of Dystocia and Estimation of Age." Journal of Buffalo Science 11 (January 17, 2022): 1–7. http://dx.doi.org/10.6000/1927-520x.2022.11.01.

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Background: The current study aimed to determine the most strongly correlated variable of pelvimetry with the parity in our native breed Egyptian buffaloes. Methods: The study was conducted on 36 female buffaloes (nullipara, n=14, primipara n=6 and pluripara, n=16 with 2-4 births) aged between <15 months, n=15 and 65 months, n=21. The internal and external pelvic measurements were obtained using the rice pelvimeter and Freeman’s measuring tape. Results: Strong positive linear relationships were found for the distance between ischiatic tuberosities and the distance between sacral tubercles with the correlation coefficients of 0.64 and 0.62, respectively. The conjugate diameter increased progressively with the age and number of births, with a correlation coefficient of 0.96. The pelvic area had a very strong positive linear relationship with a correlation coefficient of 0.89. The linear combination of the predictor variable (conjugate diameter), to predict the number of birth was developed successfully. Conclusion: The strong relationship between the conjugate diameter and the number of births could be employed to predict the dystocia and estimate the age of female buffalo. Furthermore, these findings could be aid paleontologists in studying buffalo fossils.

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MOORE, MARLENE M., and DOUGLAS R. SHEARER. "Fetal Dose Estimates for CT Pelvimetry." Obstetrical & Gynecological Survey 45, no. 4 (1990): 235–36. http://dx.doi.org/10.1097/00006254-199004000-00006.

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Anderson, N., N. Humphries, and JE Wells. "Measurement error in computed tomography pelvimetry." Australasian Radiology 49, no. 2 (2005): 104–7. http://dx.doi.org/10.1111/j.1440-1673.2005.01417.x.

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Dobak, Tetyda P., George Voorhout, Johannes C. M. Vernooij, and Susanne A. E. B. Boroffka. "Computed tomographic pelvimetry in English bulldogs." Theriogenology 118 (September 2018): 144–49. http://dx.doi.org/10.1016/j.theriogenology.2018.05.025.

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38

Lecomber, A. R., R. Cassidy, and D. Tennani. "Radiation doses to patients undergoing pelvimetry." Clinical Radiology 53, no. 12 (1998): 932–33. http://dx.doi.org/10.1016/s0009-9260(98)80228-6.

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Griffiths, Malcolm. "Magnetic-resonance pelvimetry in breech presentation." Lancet 351, no. 9106 (1998): 912. http://dx.doi.org/10.1016/s0140-6736(05)70332-9.

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van der Post, JAM, and JB Maathuis. "Magnetic-resonance pelvimetry in breech presentation." Lancet 351, no. 9106 (1998): 913. http://dx.doi.org/10.1016/s0140-6736(05)70333-0.

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van Loon, AJ, and A. Mantingh. "Magnetic-resonance pelvimetry in breech presentation." Lancet 351, no. 9106 (1998): 913. http://dx.doi.org/10.1016/s0140-6736(05)70334-2.

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Walkinshaw, SA. "Pelvimetry and breech delivery at term." Lancet 350, no. 9094 (1997): 1791–92. http://dx.doi.org/10.1016/s0140-6736(05)63631-8.

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Danielian, P. J., R. C. Henshaw, and H. K. Hinshaw. "Routine postnatal examination. Pelvimetry is unnecessary ..." BMJ 307, no. 6911 (1993): 1064–65. http://dx.doi.org/10.1136/bmj.307.6911.1064-c.

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Moore, M. M., and D. R. Shearer. "Fetal dose estimates for CT pelvimetry." Radiology 171, no. 1 (1989): 265–67. http://dx.doi.org/10.1148/radiology.171.1.2928535.

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Lenhard, M., T. Johnson, S. Weckbach, K. Nikolaou, K. Friese, and U. Hasbargen. "Three-dimensional pelvimetry by computed tomography." La radiologia medica 114, no. 5 (2009): 827–34. http://dx.doi.org/10.1007/s11547-009-0390-x.

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46

Hogston, P. "Should we abandon X‐ray pelvimetry?" International Journal of Clinical Practice 43, no. 2 (1989): 71–73. http://dx.doi.org/10.1111/j.1742-1241.1989.tb08670.x.

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47

Mudrov, Viktor A., Elena M. Chatskis, Daria A. Nizhegorodtseva, and Elena V. Tttjan. "Significance of ultrasound pelviometry in the diagnostics of anatomical and clinical narrow pelvis." Journal of obstetrics and women's diseases 66, no. 6 (2017): 20–29. http://dx.doi.org/10.17816/jowd66620-29.

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Rational management of labor with a narrow pelvis is one of the most difficult sections of practical obstetrics, because narrow pelvis is the main cause of birth trauma and childhood disability. The aim of the study was to determine significance of ultrasound pelviometry in the diagnostics of anatomical and clinical narrow pelvis. On the basis of maternity hospitals of Trans-Baikal Region in the years 2013-2017 was held retrospective and prospective analysis of 150 labor histories, which were divided into 3 equal groups: group 1 – pregnant women with normal sizes of the large pelvis, group 2 – pregnant women with macrosomia, group 3 – pregnant women with a reduced sizes of the large pelvis. Ultrasonic pelvimetry included measurement of direct and transverse sizes of the planes of the pelvic cavity and the angle of the pubic arc through the integrated use of abdominal, transvaginal and translabial sensors of ultrasound machine Toshiba Aplio 500. In the group of pregnant women with normal sizes of the large pelvis frequency of diagnosis of anatomical narrow pelvis used by ultrasound pelvimetry is 32%. In the group of pregnant women with macrosomia is dominated the normal size of the pelvic cavity (62%) and “wide pelvis” (18%). In 20 % of cases the diagnosis of anatomical narrow pelvis in group 3 was not confirmed by the data of ultrasonic pelvimetry. The most common forms of the narrow pelvis were the transversal pelvis (46%), the simple flat pelvis (14%), the uniformly narrow pelvis (10%). On the basis of mathematical modeling defined pattern, which is expressed by the formula:    where AE – angle extension of the head, PC – angle of the pubic arc, TD1 – transverse size of the plane of the entrance, TD2 – transverse size of the plane of the output, FD1 – direct size of the plane of the entrance, FD2 – direct size of the narrowest part of the pelvic cavity, GA – gestational age, BPD – biparietal size, OFD – fronto-occipital size of the fetus’s head. When the value of the coefficient less than 1 is projected clinically narrow pelvis (r2 = 0,92). Thus, ultrasonic pelvimetry allows to determine not only the size of the pelvic cavity, but also to predict clinically narrow pelvis.

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Yasar, Necdet Fatih, Elif Gundogdu, Arda Sakir Yilmaz, et al. "Can 3D radiological calculations predict operational difficulties for rectal cancer?: A single center retrospective analysis." Medicine 103, no. 3 (2024): e36961. http://dx.doi.org/10.1097/md.0000000000036961.

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Low anterior resection, performing total mesorectal excision with appropriate pelvic dissection to prevent local recurrence, is probably the most challenging type of surgery in colorectal surgery, especially in a narrow pelvis. In this study, we aimed to predict the operation difficulty of rectal cancer by comparing the operation time with 2D and 3D pelvimetry. Sixty-six patients who underwent total mesorectal excision after neoadjuvant chemoradiotherapy due to primary rectal cancer located in the middle and lower rectum (10 cm from the anus) were included in the study. Surgery notes were reviewed and data on demographic factors, tumor stage, duration of surgery, and types of surgery were collected, as well as pelvimetric parameters. All protocols had 2D T2-weighted sequences in 3 planes (axial, sagittal, and coronal). Pelvimetric measurements were made by measuring 8 pelvic lengths and 2 angles. Pelvis and tumor volume were measured by manual margin monitoring. In each slice, both pelvis and tumor boundaries were manually drawn individually in the sagittal plane. Pelvis and tumor volumes were calculated from the set of adjacent images by summing slice thickness and products of area measurements within the pelvis and tumor boundaries. In our results, no correlation was observed with operation time, including pelvic volume. Exception for this were interacetabular distance and tumor volume. In the regression test, the only parameter that correlated with the operation time was tumor volume. In conclusion, we believe that tumor volumetric calculations may be useful in predicting difficult distal rectal carcinoma surgeries.

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Smargiassi, N. F., I. C. C. Lippi, R. G. S. Oliveira, et al. "Radiographic pelvimetry in 0 to 24 month-old pacas (Agouti paca, Linnaeus, 1766)." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 71, no. 4 (2019): 1293–98. http://dx.doi.org/10.1590/1678-4162-10060.

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ABSTRACT The pelvimetry consists of the metric determination of the pelvis dimensions and its use is directly related to the reproduction. The cartilage closure time of the ossification centers varies according to the bone, some closing already in the uterine life and others remaining present for many years. The objective was to evaluate, radiographically, the pelvic diameters by pelvimetry during the first 24 months of life in pacas, the second lagest Brazilian rodent and an animal that has shown big recent scientific interest, aiming the estimated age determination. Twelve pacas were used, which were monthly radiographed up from birth until 24 months old, with the animals anesthetized. The pacas are dolicopelvic animals and with pelvis presenting strong tendency to constant growth along the 12 first months of age, fact that can be useful in the approximated animals’ age determination that do not have precise birth date, for example.

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Holje, G., O. Jarlman, and L. Samuelsson. "Radiation doses and image information in digital pelvimetry with a phosphorous screen." Acta Radiologica 38, no. 1 (1997): 181–84. http://dx.doi.org/10.1080/02841859709171265.

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Purpose: The aim of the investigation was to determine the patient dose in digital pelvimetry by means of a phosphorous screen as compared to a screen-film combination of very high sensitivity. Material and Methods: Entrance dose measurements and absorbed dose determinations in a series of patient exposures were made. In the first series the exposure reduction was achieved by reducing the mAs (tube current × exposure time) for the lateral and the a.p. views as compared with those used for the screen-film system. In the second series the tube potential, kV, was increased for both projections in order to increase the penetration capacity of the radiation. Results and Conclusion: The imaging plate technique can be used in pelvimetry with a dose reduction (and a corresponding reduction of the radiation risk to the foetus) to less than 50% of that achieved with a screen-film system of the very highest sensitivity.

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