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Journal articles on the topic 'Videodensitometry'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Strid, K. G., and P. Kälebo. "Bone Mass Determination from Microradiographs by Computer-Assisted Videodensitometry." Acta Radiologica 29, no. 4 (1988): 465–72. http://dx.doi.org/10.1177/028418518802900417.

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The mass of hard-tissue specimens is assessed by optimised microradiography followed by computer-assisted videodensitometry. Radiographs are produced with 27 kV roentgen radiation, filtered through 0.5 to 1 mm of aluminium, on high-resolution glass plates. Aluminium step wedges are used for density calibration, the result being expressed as ‘aluminium equivalent mass’. The plates are subjected to digital image analysis by an operator in interaction with a computer-based image processor, a television camera being used for image input. The program stored in the computer provides calibration of g

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2

Voronin, Alexander V. "Techniques of quantitative evaluation of verapamil content in whole blood." Aspirantskiy Vestnik Povolzhiya 19, no. 5-6 (2020): 116–21. http://dx.doi.org/10.17816/2072-2354.2019.19.3.116-121.

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Verapamil is a drug that can be toxic in pharmacological therapy and in case of misuse. Simple and informative methods of Verapamil quantification for forensic chemistry and hospital toxicology are needed. Aim. The objective of the study was to compare analytical potential of different methods for Verapamil quantification used in forensic chemistry and hospital toxicology. Materials and methods. The subject study was whole blood samples containing Verapamil. Verapamil in the blood samples was identified by gas chromatography-mass-spectrometry. Verapamil was quantified by thin-layer

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3

Kälebo, P., and K. G. Strid. "Bone Mass Determination from Microradiographs by Computer-Assisted Videodensitometry." Acta Radiologica 29, no. 5 (1988): 611–17. http://dx.doi.org/10.1177/028418518802900524.

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Aluminium was evaluated as a reference substance in the assessment of rabbit cortical bone by microradiography followed by videodensitometry. Ten dense, cortical-bone specimens from the same tibia diaphysis were microradiographed using prefiltered 27 kV roentgen radiation together with aluminium step wedges and bone simulating phantoms for calibration. Optimally exposed and processed plates were analysed by previously described computer-assisted videodensitometry. For comparison, the specimens were analysed by physico-chemical methods. A strict proportionality was found between the ‘aluminium

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4

Mischi, M., A. A. C. M. Kalker, and H. H. M. Korsten. "Cardiac Image Segmentation for Contrast Agent Videodensitometry." IEEE Transactions on Biomedical Engineering 52, no. 2 (2005): 277–86. http://dx.doi.org/10.1109/tbme.2004.840500.

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5

Wegenius, G., T. Wegener, G. Ruhn, T. Saldeen, and U. Erikson. "Videodensitometry in Rats with Pulmonary Damage Due to Microembolism." Acta Radiologica. Diagnosis 26, no. 6 (1985): 785–88. http://dx.doi.org/10.1177/028418518502600627.

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Serial pulmonary angiography with videodensitometry was performed in 18 rats with pulmonary damage caused by administration of a fibrinolysis inhibitor, tranexamic acid (200 mg/kg body weight injected intraperitoneally) and bovine thrombin (500 NIH/kg body weight injected into the right femoral vein). The mean transit time (MTT) was calculated from videodensitometry, the observed area of interest consisting of approximately one-third of the right lung, including both central and peripheral parts. The impact of the pulmonary damage was analysed by morphologic methods and correlated to MTT. Alth

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6

Kassab, G. S., and S. Molloi. "Cross-sectional area and volume compliance of porcine left coronary arteries." American Journal of Physiology-Heart and Circulatory Physiology 281, no. 2 (2001): H623—H628. http://dx.doi.org/10.1152/ajpheart.2001.281.2.h623.

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We have determined the cross-sectional area (CSA) compliance of the first several generations of pig coronary arteries and the volume compliance of the coronary arterial tree (vessels >0.5 mm in diameter) using a videodensitometric technique. The coronary arteries of four KCl-arrested maximally vasodilated pig hearts were perfused with iodine and 3% Cab-O-Sil. Because Cab-O-Sil occludes small arteries, the flow can be stopped and the pressure can be maintained while the trunk of the coronary artery and its subbranches are imaged using digital angiography. The coronary arteries were precondi

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7

SIMONS, MARGARET A., ROBERT A. KRUGER, and R. L. 'BUBBA' POWER. "Cross-Sectional Area Measurements by Digital Subtraction Videodensitometry." Investigative Radiology 21, no. 8 (1986): 637–44. http://dx.doi.org/10.1097/00004424-198608000-00007.

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8

Theron, Hendrik du T., Charles R. Lambert, and Carl J. Pepine. "Videodensitometry versus digital calipers for quantitative coronary angiography." American Journal of Cardiology 66, no. 17 (1990): 1186–90. http://dx.doi.org/10.1016/0002-9149(90)91096-o.

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9

Kalebo, P., and K. G. Strid. "Bone mass determination from microradiographs by computer-assisted videodensitometry." Acta Radiologica 29, no. 5 (1988): 611–17. http://dx.doi.org/10.3109/02841858809171947.

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10

Strid, K. G., and P. Kälebo. "Bone mass determination from microradiographs by computer-assisted videodensitometry." Acta Radiologica 29, no. 4 (1988): 465–72. http://dx.doi.org/10.3109/02841858809175022.

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11

Yang, X. M., H. Manninen, H. X. Ji, P. Vainio, and S. Soimakallio. "Accuracy of Digital Videodensitometry in Quantitating Contrast Medium Concentration." Acta Radiologica 35, no. 4 (1994): 378–82. http://dx.doi.org/10.3109/02841859409173308.

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12

Kälebo, P., and K. G. Strid. "Bone mass determination from microradiographs by computer-assisted videodensitometry." Acta Radiologica 29, no. 5 (1988): 611–17. http://dx.doi.org/10.1080/02841858809171947.

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13

Yang, X. M., H. Manninen, H. X. Ji, P. Vainio, and S. Soimakallio. "Accuracy of Digital Videodensitometry in Quantitating Contrast Medium Concentration." Acta Radiologica 35, no. 4 (1994): 378–82. http://dx.doi.org/10.1080/02841859409173308.

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14

Yang, X. M., H. Manninen, H. X. Ji, P. Vainio, and S. Soimakallio. "Accuracy of Digital Videodensitometry in Quantitating Contrast Medium Concentration." Acta Radiologica 35, no. 4 (1994): 378–82. http://dx.doi.org/10.1177/028418519403500413.

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To evaluate the accuracy of digital videodensitometric technique in directly quantitating concentration of contrast medium, iohexol 300 mg I/ml was injected into a 2-mm-diameter plastic tube, in which clean water was circulated at a 190 ml/min flow, for digital subtraction angiography. Altogether 27 injections were performed with 3, 4 and 5 ml volumes at 3-, 4- and 5-ml/s flows of the contrast medium. A time-density curve was achieved by selecting a “vessel” region of interest (ROI) and a background ROI. Then, a frame corresponding to the maximum opacification of the contrast medium could be c

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15

Berezkin, V. G., L. A. Onuchak, and E. N. Evtyugina. "Capillary version of Tswett column chromatography with videodensitometry detection." Doklady Physical Chemistry 421, no. 1 (2008): 174–76. http://dx.doi.org/10.1134/s0012501608070051.

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16

Kälebo, Peter, and Karl-Gustav Strid. "Radiographic videodensitometry for quantitative monitoring of experimental bone healing." British Journal of Radiology 62, no. 742 (1989): 883–89. http://dx.doi.org/10.1259/0007-1285-62-742-883.

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17

Molloi, Sabee, Quang Dang, and John Breault. "Effect of vessel orientation on videodensitometry quantitative coronary arteriography." Medical Physics 30, no. 11 (2003): 2862–68. http://dx.doi.org/10.1118/1.1617352.

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18

Squillante, Robert G., and John L. Williams. "Videodensitometry of osteons in females with femoral neck fractures." Calcified Tissue International 52, no. 4 (1993): 273–77. http://dx.doi.org/10.1007/bf00296651.

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19

Jaillard, Benoit, Laurent Ruiz, and Jean-Claude Arvieu. "pH mapping in transparent gel using color indicator videodensitometry." Plant and Soil 183, no. 1 (1996): 85–95. http://dx.doi.org/10.1007/bf02185568.

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20

Babić, S., D. Mutavdžić, D. Ašperger, A. J. M. Horvat, and M. Kaštelan-Macan. "Determination of Veterinary Pharmaceuticals in Production Wastewater by HPTLC-Videodensitometry." Chromatographia 65, no. 1-2 (2006): 105–10. http://dx.doi.org/10.1365/s10337-006-0109-2.

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21

CLOSE, ROBERT A., GARY R. DUCKWILER, and FERNANDO VI??UELA. "Fluid Equations Applied to Blood Flow Measurement Using Digital Videodensitometry." Investigative Radiology 27, no. 7 (1992): 504–8. http://dx.doi.org/10.1097/00004424-199207000-00004.

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22

Nishimura, Rick A., Paul J. Rogers, David R. Holmes, Dale G. Gehring, and Alfred A. Bove. "Assessment of myocardial perfusion by videodensitometry in the canine model." Journal of the American College of Cardiology 9, no. 4 (1987): 891–97. http://dx.doi.org/10.1016/s0735-1097(87)80247-4.

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23

Pijls, N. H., G. J. Uijen, A. Hoevelaken, et al. "Mean transit time for the assessment of myocardial perfusion by videodensitometry." Circulation 81, no. 4 (1990): 1331–40. http://dx.doi.org/10.1161/01.cir.81.4.1331.

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24

Maher, K. P., M. K. O'Connor, and J. F. Malone. "Experimental examination of videodensitometry of large opacifications in digital subtraction angiography." Physics in Medicine and Biology 32, no. 10 (1987): 1273–82. http://dx.doi.org/10.1088/0031-9155/32/10/006.

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25

SIMONS, MARGARET A., ALAN D. MUSKETT, ROBERT A. KRUGER, STEVEN C. KLAUSNER, NELSON A. BURTON, and JAMES A. NELSON. "Quantitative Digital Subtraction Coronary Angiography Using Videodensitometry An In Vivo Analysis." Investigative Radiology 23, no. 2 (1988): 98–106. http://dx.doi.org/10.1097/00004424-198802000-00004.

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26

Mårtensson, G., M. Söderman, T. Andersson, and A. Johansson. "Injection protocol effects on evaluation of flow characteristics in pseudo-3D videodensitometry." Journal of Biomechanics 39 (January 2006): S615. http://dx.doi.org/10.1016/s0021-9290(06)85555-7.

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27

NAITO, TETSUYA, SEIJI KIKUCHI, WATARU OGAWA, NORIKAZU ARAI, and MAMORU KAWAMURA. "398. Mean Transit Time for the Assessment of Myocardial Perfusion by Videodensitometry." Japanese Journal of Radiological Technology 47, no. 8 (1991): 1429. http://dx.doi.org/10.6009/jjrt.kj00003324138.

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28

Pijls, Nico H. J., Gerard J. H. Uijen, Truus Pijnenburg, et al. "Reproducibility of mean transit time for maximal myocardial flow assessment by videodensitometry." International Journal of Cardiac Imaging 6, no. 2 (1990): 101–8. http://dx.doi.org/10.1007/bf02398893.

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29

Balkin, Jonathan, David Rosenmann, Micky Ilan, and Monty M. Zion. "Reproducibility of Measurements of Coronary Narrowings by Videodensitometry and by Digital Calipers." Cardiology 81, no. 4-5 (1992): 238–44. http://dx.doi.org/10.1159/000175810.

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30

BARTH, W. "Contrast sonography, videodensitometry, and experimentally reduced intervillous blood flow: A pilot project." Journal of the Society for Gynecologic Investigation 2, no. 2 (1995): 322. http://dx.doi.org/10.1016/1071-5576(95)94471-6.

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31

Umans, Victor A., Bradley H. Strauss, Pim J. de Feyter, and Patrick W. Serruys. "Edge detection versus videodensitometry for quantitative angiographic assessment of directional coronary atherectomy." American Journal of Cardiology 68, no. 5 (1991): 534–39. http://dx.doi.org/10.1016/0002-9149(91)90793-k.

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32

Zheng, Xiao-Zhi, Lian-Fang Du, and Hui-Ping Wang. "Evaluation of left ventricular hypertrophy in hypertensive patients with echocardiographic myocardial videodensitometry normalized by displacement." Bosnian Journal of Basic Medical Sciences 10, no. 4 (2010): 292–96. http://dx.doi.org/10.17305/bjbms.2010.2674.

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Left ventricular hypertrophy (LVH) is an important predictor of cardiovascular morbidity and mortality. To investigate the feasibility of the myocardial grayscale intensity (GI) normalized by displacement (d) to discriminate between healthy and hypertrophic myocardium in hypertensive patients, sixty hypertensive patients and sixty age and sex-matched healthy volunteers were involved in this study. The peak d and the maximal GI [GI(max)] and minimal GI [GI(min)] for the middle interventricular septal (IVS) and the middle posterior wall (PW) at the level of papillary muscle were obtained from th

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33

Pijls, Nico H. J., H. S. Bos, G. J. H. Uijen, and T. Van der Werf. "Is nonionic isotonic iohexol the contrast agent of choice for quantitative myocardial videodensitometry?" International Journal of Cardiac Imaging 3, no. 2-3 (1988): 117–26. http://dx.doi.org/10.1007/bf01814884.

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34

Balkin, Jonathan, David Rosenmann, Micky Ilan, and Monty M. Zion. "Reproducibility of measurements of coronary narrowings by videodensitometry: Unreliability of single view measurements." International Journal of Cardiac Imaging 5, no. 2-3 (1990): 119–24. http://dx.doi.org/10.1007/bf01833980.

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35

Martin, R., R. Door, and D. Breitig. "High-resolution imaging of protein phosphorylation in squid axons and synapse by electron energy loss spectroscopy." Journal of Histochemistry & Cytochemistry 41, no. 8 (1993): 1133–39. http://dx.doi.org/10.1177/41.8.8331279.

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We demonstrate that clusters of phosphorus atoms can be detected in energy loss spectroscopic images (ESI) of cytoskeletal proteins of squid axons. In series of images taken at four energy windows below and three windows above the phosphorus P-L2,3 ionization edge, signal-to-background intensity differences were analyzed by videodensitometry. A distinct increase of relative intensities was recorded above the phosphorus edge in neurofilaments of the peripheral giant axon and in those of the presynaptic terminal. A high level of neurofilament phosphorylation in the peripheral axon supports previ

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36

Xie, F., and R. S. Meltzer. "Determination of ejection fraction from contrast echocardiography using videodensitometry in an in vitro model." Journal of Ultrasound in Medicine 7, no. 10 (1988): 581–87. http://dx.doi.org/10.7863/jum.1988.7.10.581.

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37

Murata, Kazuya, Valmik Bhargava, François Ricou, et al. "The influence of coronary collateral flow on the assessment of myocardial perfusion by videodensitometry." Cardiovascular Research 33, no. 2 (1997): 359–69. http://dx.doi.org/10.1016/s0008-6363(96)00218-0.

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38

Peters, Ron J. G., Wouter E. M. Kok, Hans Bot, and Cees A. Visser. "Characterization of Plaque Components With Intracoronary Ultrasound Imaging: An In Vitro Quantitative Study With Videodensitometry." Journal of the American Society of Echocardiography 7, no. 6 (1994): 616–23. http://dx.doi.org/10.1016/s0894-7317(14)80084-9.

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39

AKISHITA, Masahiro, Yasuyoshi OUCHI, Koichi KOZAKI, Akira ORIMO, Akinori HATTORI, and Hajime ORIMO. "Accuracy and Reliability of Quantitative Measurement of Coronary Arterial Stenosis by Videodensitometry on Coronary Angiogram." Japanese Heart Journal 33, no. 5 (1992): 631–41. http://dx.doi.org/10.1536/ihj.33.631.

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40

DIBELLO, V. "Microalbuminuria, pulse pressure, left ventricular hypertrophy and myocardial ultrasonic textural parameters (videodensitometry) in arterial hypertension." American Journal of Hypertension 12, no. 4 (1999): 82. http://dx.doi.org/10.1016/s0895-7061(99)80278-7.

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41

Campbell, Alison N., and Joseph Sherma. "Determination of Famotidine in Acid Reduction Tablets by HPTLC and Videodensitometry of Fluorescence Quenched Zones." Journal of Liquid Chromatography & Related Technologies 26, no. 16 (2003): 2719–27. http://dx.doi.org/10.1081/jlc-120024542.

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42

Haase, Jürgen, Cornelis J. Slager, David Keane, et al. "Quantification of intracoronary volume by videodensitometry: Validation study using fluid filling of human coronary casts." Catheterization and Cardiovascular Diagnosis 33, no. 1 (1994): 89–94. http://dx.doi.org/10.1002/ccd.1810330120.

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43

Di Bello, Vitantonio, Roberto Pedrinelli, Davide Giorgi, et al. "The potential prognostic value of ultrasonic characterization (videodensitometry) of myocardial tissue in essential arterial hypertension." Coronary Artery Disease 11, no. 7 (2000): 513–21. http://dx.doi.org/10.1097/00019501-200010000-00001.

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44

Teixeirense, Pablo T., Rodrigo Modolo, João Felipe B. de Toledo, and Patrick W. Serruys. "Feasibility of quantitative assessment of aortic regurgitation in a percutaneous closure of paravalvular leak: expanding videodensitometry." EuroIntervention 15, no. 14 (2020): 1260–61. http://dx.doi.org/10.4244/eij-d-19-00118.

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45

Komsta, Ł. "Dealing with charged-coupled device noise in thin-layer videodensitometry. Optimization of several image-denoising techniques." Acta Chromatographica 21, no. 3 (2009): 355–67. http://dx.doi.org/10.1556/achrom.21.2009.3.1.

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46

Smalling, Richard W. "Quantification of intracoronary volume by videodensitometry: A validation study using fluid filling of human coronary casts." Catheterization and Cardiovascular Diagnosis 33, no. 1 (1994): 95. http://dx.doi.org/10.1002/ccd.1810330121.

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47

Nagy, Ferenc Tamás, Tamás Horváth, Tamás Ungi, et al. "Aortic valve stenosis is associated with reduced myocardial perfusion as assessed by videodensitometry in coronary angiograms." Orvosi Hetilap 153, no. 32 (2012): 1256–62. http://dx.doi.org/10.1556/oh.2012.29409.

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Aortic valve stenosis may be accompanied by angina despite coronary arteries free of significant stenosis due to microvascular abnormalities. Aims: The aim of the current study was to test whether densitometry-derived myocardial perfusion on coronary angiogram is reduced in patients with aortic valve stenosis. Methods: The study comprised 20 patients with aortic valve stenosis (mean transvalvular gradient: 47.4±15.2 mm Hg) and 30 control subjects without significant epicardial coronary artery stenosis. A quantitative parameter of myocardial perfusion was calculated by the ratio of maximal dens

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48

DIBELLO, V., R. PEDRINELLI, D. GIORGI, et al. "691 Microalbuminuria, pulse pressure, left ventricular hypertrophy and myocardial ultrasonic textural parameters (videodensitometry) in arterial hypertension." European Journal of Echocardiography 1 (December 1999): S113. http://dx.doi.org/10.1016/s1525-2167(99)80396-5.

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49

Pijls, N. H., W. R. Aengevaeren, G. J. Uijen, et al. "Concept of maximal flow ratio for immediate evaluation of percutaneous transluminal coronary angioplasty result by videodensitometry." Circulation 83, no. 3 (1991): 854–65. http://dx.doi.org/10.1161/01.cir.83.3.854.

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50

Bos, L. J., J. J. Piek, and J. A. E. Spaan. "Background subtraction from time-intensity curves in videodensitometry: A pitfall in flow assessment using contrast echocardiography." Ultrasound in Medicine & Biology 21, no. 9 (1995): 1211–18. http://dx.doi.org/10.1016/0301-5629(95)02015-2.

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