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Tesi sul tema "Fetal measurements"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 21 febbraio 2023

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1

Westerway, Susan Lyn Campbell. "Ultrasonic assessment of fetal size and growth." University of Sydney, 2006. http://hdl.handle.net/2123/2626.

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Doctor of Philosophy (Medicine)<br>This work investigates a number of issues. Firstly it examines ultrasonic fetal biometry, the parameters and techniques for accurate measuring and reviews the procedure adopted for graph formation and application of regression analysis for a mathematical model to describe the relationship between fetal size and weeks of gestation. Next it establishes new Australian fetal measurement charts for the crown rump length, head circumference and abdominal circumference, based on an Australian population, to replace the charts currently in use that are over 20 year

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2

Westerway, Susan Lyn Campbell. "Ultrasonic assessment of fetal size and growth." Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/2626.

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This work investigates a number of issues. Firstly it examines ultrasonic fetal biometry, the parameters and techniques for accurate measuring and reviews the procedure adopted for graph formation and application of regression analysis for a mathematical model to describe the relationship between fetal size and weeks of gestation. Next it establishes new Australian fetal measurement charts for the crown rump length, head circumference and abdominal circumference, based on an Australian population, to replace the charts currently in use that are over 20 years old and relate to middle class wh

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3

Shivkumar, Sushmita. "A fetal weight reference for twins based on ultrasound measurements." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106242.

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Background and ObjectiveFetal growth and size are known indicators of perinatal health, although the etiology of this relationship is unclear, and twins are known to differ from singletons with respect to fetal growth trajectories over the course of pregnancy. With a lack of research on ultrasound-based fetal weight references in twin populations, this study aimed to construct ultrasound-based in utero fetal weight references for each gestational age for a twin population.MethodsTwins delivered at a tertiary care hospital in Montreal were used in this study. Fetal weight was calculated using

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4

Hall, Angus John. "Electronic measurements of area and perimeter in ultrasonic images." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328883.

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5

Sarris, Ippokratis. "Creation of a new fetal biometry image quality scoring tool to improve the accuracy of fetal biometric measurements." Thesis, University of Oxford, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.595667.

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The hypothesis of this work is that through establishing the background variation of ultrasonographic fetal biometry measurements and elucidating the parameters that influence these measurements, a new Fetal Ultrasound Biometry Quality (FUB-Q) image-scoring tool can be created which will be reproducible and able to quantify the accuracy of fetal measurements. Six studies are included, each answering a specific research question. The aim of the first study was to ascertain whether pre-existing image quality scoring methods reflect measurement accuracy and reproducibility. It demonstrated that d

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6

Canto, Moreira Nuno. "MRI Studies of the Fetal Brain and Cranium." Doctoral thesis, Uppsala universitet, Enheten för radiologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-164685.

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Ultrasound is the primary modality for fetal imaging, but Magnetic Resonance Imaging nowadays has a valuable complementary role as it often reveals findings that alter pregnancy management. Knowledge on some clinically relevant areas of the normal fetal development is still lacking, and this was the aim of this project. We wanted 1) to obtain reference MRI data of normal brain measurements before 24 gestation weeks (GW), 2) to study the development of the hippocampus, 3) to study the development of the ear and 4) to test the ability of MRI for evaluating the lip and palate. For this, we retros

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7

Yaqub, Mohammad. "Automatic measurements of femoral characteristics using 3D ultrasound images in utero." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:857a12d2-ffe3-4fa6-89c3-0d8319ee2fbb.

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Vitamin D is very important for endochondral ossification and it is commonly insufficient during pregnancy (Javaid et al., 2006). Insufficiency of vitamin D during pregnancy predicts bone mass and hence predicts adult osteoporosis (Javaid et al., 2006). The relationship between maternal vitamin D and manually measured fetal biometry has been studied (Mahon et al., 2009). However, manual fetal biometry especially volumetric measurements are subjective, time-consuming and possibly irreproducible. Computerised measurements can overcome or at least reduce such problems. This thesis concerns the de

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8

Økland, Inger. "Biases in second-trimester ultrasound dating related to prediction models and fetal measurements." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for laboratoriemedisin, barne- og kvinnesykdommer, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16221.

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FEILKILDER VED ULTRALYD-BASERT TERMINFASTSETTELSE I 2. TRIMESTER, RELATERT TIL PREDIKSJONSMETODER OG MÅLINGER Rutineundersøkelsen med ultralyd rundt svangerskapsuke 17–19 har vært en viktig del av norsk svangerskapsomsorg siden den ble innført i 1986. Når skjer fødselen? — altså sikker fastsettelse av fødselstermin, er ett av spørsmålene rutineundersøkelsen skal gi svar på. Terminen er blitt bestemt ved at fosterstørrelsen måles med ultralyd og relateres til antatt fosteralder og derfra til beregnet ultralydtermin. Termindato er vanligvis basert på målinger av fosterets hodestørrelse, men len

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9

Bergman, Eva. "Symphysis Fundus Measurements for Detection of Intrauterine Growth Retardation." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-122256.

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10

Connor, Jillian. "Measurement of, and relationship between, placental size and fetal cardiac development." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/397649/.

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Introduction -Fetal programming is the concept by which a fetus adapts to the intrauterine environment by altering blood flow to various organs which may induce permanent structural and/or functional change in those organs, altering disease susceptibility in later life. We hypothesised that the heart is a susceptible organ and that alterations in blood flow from the placenta in relation to maternal factors may have different effects on each side of the heart. We therefore aimed to assess the feasibility of measuring placental volume and growth, cardiac structure and cardiac function and assess

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11

Pennell, Craig Edward. "The role of lactate measurement in the prediction of fetal hypoxic-ischaemic brain injury during labour." University of Western Australia. School of Women's and Infants' Health, 2004. http://theses.library.uwa.edu.au/adt-WU2003.0037.

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[Truncated abstract] In this thesis the role of lactate measurement has been evaluated in intrapartum assessment of fetal wellbeing. Specifically, I have addressed the question of whether fetal lactate measurement is better than the assessment of fetal heart rate patterns or the measurement of pH at predicting fetal brain injury after intrapartum asphyxia. Using an ovine model of repeated umbilical cord occlusion designed to mimic events which may occur during human labour, I have shown that the measurement of fetal lactate levels after repeated cord occlusion is significantly associated with

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12

Peterson, Alexander. "The Fecal Incontinence Quality of Life Scale (FIQL) : improving outcomes measurement." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61085.

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The Fecal Incontinence Quality of Life scale (FIQL) is a patient reported outcome measure (PROM) that is used to measure the effect that fecal incontinence has on quality of life, and has previously demonstrated high reliability and validity. It measures four domains of quality of life: lifestyle, coping/behavior, depression/self-perception, and embarrassment. Despite its wide use, previous studies have not applied rigorous modern methods to evaluate the FIQL's psychometric properties at the item and test level. This thesis used a cohort of prospectively recruited patients from an elective s

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13

Yin, Kai-Ming. "Stereology and automated measurement of the human brain." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31286.

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Stereology supplies image sampling rules to estimate geometric quantities such as volume, surface area, feature length and number. The method is well suited to non-invasive image acquisition methods such as Magnetic Resonance Imaging (MRI). Meanwhile, in Magnetic Resonance (MR) images analysis area, automated software packages have been continuously developed and become well-established tools especially in human brainMR images processing. The aims of the thesis are (1) to combine proper rules to sample MR images with automated or semi-automated data acquisition methods, in order to implement f

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14

Wahlstrom, Meghan. "Drinking Water in the Developing World: Sources of Fecal Contamination in Pitcher Pump Systems and Measurement Alternatives." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5146.

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It has been reported that globally we have achieved Millennium Development Goal (MDG) Target 7C, to halve the proportion of the population without access to safe drinking water; however, there is a major flaw with this statement. While Target 7C calls for access to `safe' drinking water, what is actually being measured and reported is access to an `improved' water source. The World Health Organization (WHO) maintains that they must use this proxy measure because the methods for water quality testing are too expensive and logistically complicated, but by doing so, they may be over reporting saf

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15

Vítek, Milan. "Kardiotokograf - sledování kontrakcí." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221358.

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Purpose of this thesis is to study the principle of operation of cardiotocography in monitoring fetal life, further defining the main requirements for this equipment and defining the parameters of monitored biosignals. These findings are supported by the literature. Based on the gained knowledge, the system design of cardiotocography is made with focus on reading contractions. Main parameters of the function blocks are defined. Circuit solution for sensing contractions is suggested, including the design of the sensor. Designed circuits are verified on a prototype.

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16

Stenberg, Maria. "Testverktyg för prestandamätningar av feta klienter : - En fallstudie med fokus på identifiering av testverktyg och beskrivning av viktiga kriterier för dessa." Thesis, Högskolan Dalarna, Informatik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:du-25610.

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Denna studie syftar till att beskriva prestandatest av feta klienter, ibland också kallade skrivbordsapplikationer. Studien syftar även till att kartlägga testverktyg som kan användas för att utföra prestandatest av feta klienter och att identifiera vilka egenskaper som anses vara viktiga kriterier för dessa testverktyg. Undersökningen är skapad som en fallstudie som undersökningsstrategi där fallets utgångspunkt är Trafikverkets behov men undersökning och dess resultat kan även appliceras på andra verksamheter där testarbete utförs. Både kvalitativ och kvantitativ datainsamling användes i und

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17

Pai, Shih-Han, and 白詩涵. "Using artificial neural network model with clinical ultrasound measurements for fetal weight prediction." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/41522739977019074640.

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Wang, Shyh-Roei, and 王世蕊. "3-D Image Display and Measurement for Fetal Ultrasound." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/65380163887008902279.

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碩士<br>國立成功大學<br>資訊工程學系<br>86<br>The techniques using ultrasound as a diagnosis tool have been highly developed with rapid advances in technology in recent years. Due to the properties of convenience and non-invasion, ultrasound has become an essential tool for diagnosis of fetal abnormality during women pregnancy in obstetrics. It surely helps the physicians and patient''s family to make a proper decision before the birth of the baby. Therefore, the health insurance covers the expenses of

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19

Huang, Hsiao-Han, and 黃筱涵. "Measurement of Fetal Craniofacial Structure Using Model-based Segmentation from 3D Ultrasound Images." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/75907055763926886081.

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碩士<br>國立成功大學<br>醫學資訊研究所<br>97<br>In evaluation of the fetal growth in uterus, ultrasound is the most convenient and powerful tool in clinic due to its real time, low cost, easy to use and non-invasive nature. The doctors diagnose many anomaly syndromes of fetuses according to the measurement of fetal craniofacial structure. Since the ultrasound images have the disadvantages of low signal-to-noise ratio (SNR) and ambiguous anatomical structure, the human error and high variance may happen when the doctors measure the landmarks. However, it is also difficult to develop the automatic measurement

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20

Chen, Tzong-Rong, and 陳張宗榮. "Complexity Measurement of Fetal Cortical Surfaces from Magnetic Resonance Images using Fractal Dimension Analysis." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16783238617586647807.

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博士<br>國立中央大學<br>電機工程研究所<br>98<br>Although fractal dimension (FD) analyses of adult human brain complexity have been performed for several years; the use of FD analysis for complexity measurement of the developmental fetal cortical surface has not been investigated. This work aims to measure complexity of the developmental fetal cortical surface from magnetic resonant images (MRI) using the concept of FD analysis. To quantify the FD that clarifies the complexity of fetal cortical surface, four methods of FD analysis were presented and extended from 2D to 3D. The presented 3D methods of FD analy

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21

Brennan, Sonja. "The renal parenchyma – evaluation of a novel ultrasound measurement to assess fetal renal development." Thesis, 2020. https://researchonline.jcu.edu.au/68404/1/JCU_68404_Brennan_2020_thesis.pdf.

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Sonja Brennan used a novel ultrasound measurement of the renal parenchyma to evaluate fetal kidney growth. Normal ranges of fetal renal parenchymal thickness were developed to aid diagnosis of kidney disease and help predict future kidney function. The effects of abnormal fetal growth and diabetes on the developing kidneys was explored.

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Mojdehbakhsh, Rachel. "Serial fecal ASCA measurements in the evaluation of children with Crohn's disease." Thesis, 2015. https://hdl.handle.net/2144/16025.

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BACKGROUND: Pediatric patients with Inflammatory Bowel Disease (IBD) undergo costly and invasive investigations to diagnose and treat their chronic disease. To that end, it is important for researchers and physicians to continue to work to find novel tools to improve diagnosis and treatment processes. One of the main challenges is differentiating between the two main forms of IBD, Crohn disease (CD) and ulcerative colitis (UC). Physicians currently rely on a combination of endoscopic evaluations, mucosal biopsies, radiology studies, and biochemical testing to assess for the presence and extent

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23

Hui-HsuanShih and 石慧萱. "Model-based Segmentation for Measurement of Head and Trunk Structures from 3D Fetal Ultrasound Images." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/47059843866671581979.

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碩士<br>國立成功大學<br>資訊工程學系碩博士班<br>100<br>Ultrasound image (US) has been widely used for the diagnosis in clinical of gynecology. As the US image is inexpensive, easy to use, non-invasive real time and without radiation hazards, it has become the most popular imaging modality in recent years. More specifically, doctors can observe the real-time posture of fetus and evaluate the fetal growth in the uterus by using 3D ultrasound images during prenatal care. However, due to the difficulties in treating highly-noise US images, the fully automatic image segmentation tool for the fetal ultrasound is stil

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24

Moxley, Erika Michelle. "Serial fecal biomarker measurements predict response to biologic therapy in children with IBD." Thesis, 2019. https://hdl.handle.net/2144/36580.

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INTRODUCTION: The techniques currently in practice to diagnose and assess interval disease activity in patients with inflammatory bowel disease (IBD) are costly and invasive. Physicians typically rely on information derived from a combination of endoscopic, radiologic, and histologic studies to diagnose and determine the extent and severity of the two most common forms of IBD, Crohn disease (CD) and ulcerative colitis (UC). The development of noninvasive methods of assessing response to therapy is of increasing importance to pediatric healthcare providers. Previous studies have demonstrated th

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Dick, Linda K. "Fecal Bacteroidetes host distributions and environmental source tracking." Thesis, 2004. http://hdl.handle.net/1957/29752.

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Contamination of recreational and shellfish waters with fecal pollution is a major water quality issue with associated economic impacts and human health risks. Reliable fecal source identification and rapid, quantitative analyses are essential components of risk assessment. Enteric bacteria that are endemic to specific hosts have a potential role as public health indicators of fecal pollution. Building on previous work to discriminate ruminant and human fecal contamination, we cloned class Bacteroidetes 16S rRNA genes from pig, elk, dog, cat, and seagull fecal DNAs. Unique restriction patterns

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26

Mandehr, Kellen Franklyn. "The utility of fecal lactoferrin measurements in predicting disease activity of hospitalized patients with ulcerative colitis." Thesis, 2014. https://hdl.handle.net/2144/14313.

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BACKGROUND: Early identification of pediatric patients with Inflammatory Bowel Disease (IBD), including ulcerative colitis and Crohn disease, is important to help clinicians design optimal treatment regimens. Existing endoscopic techniques are effective in identifying disease activity. However, these methods are invasive, expensive, and less amenable to serial measurement. Recent studies have identified potential serologic and fecal biomarkers that may have the potential to provide clinicians with a more objective evaluation of disease activity. In the case of ulcerative colitis (UC), in w

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27

You, Kun Ming, and 游坤明. "The measurement of fetal heart rate using multi-channel textile electrodes,digital signal processor and independent component analysis." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/37631377783536889039.

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Kapke, Cynthia A. "Identification and measurement of estradiol and progesterone metabolities in white-tailed deer feces fecal assay validation techniques for a new species /." 1996. http://catalog.hathitrust.org/api/volumes/oclc/36774161.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1996.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 34-38).

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Burke, Kathrin. "Development and Analytical Validation of an Enzyme-linked Immunosorbent Assay (ELISA) for the Measurement of Feline Alpha1-proteinase Inhibitor (fa1-PI) in Serum and Feces and the Evaluation of Fecal fa1-PI Concentrations in Cats with Idiopathic Inflammatory Bowel Disease or Gastrointestinal Neoplasia." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11693.

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Alpha1-proteinase inhibitor (alpha1-PI) has been shown to be a useful marker of gastrointestinal protein loss in some species. The objectives of this study were, first, to develop and analytically validate an ELISA for the measurement of alpha1-PI in feces and serum from cats, and, second, to evaluate fecal alpha1-PI concentrations in healthy cats and cats with chronic gastrointestinal disease. The lower detection limits of the ELISA were 0.02 g/L for serum and 0.04 microgram/gram for feces. The observed-to-expected (O/E) ratios for serial dilutions of serum and fecal samples ranged from 100.

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