CT Venography

2018 ◽  
pp. 855-868
Author(s):  
Simer Grewal ◽  
Patrick Sutphin ◽  
Sanjeeva P. Kalva
Keyword(s):  
Ct Venography

Combined CT Venography and Pulmonary Angiography in Suspected Thromboembolic Disease

2000 ◽  
Vol 174 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Peter A. Loud ◽  
Douglas S. Katz ◽  
Donald L. Klippenstein ◽  
Rakesh D. Shah ◽  
Zachary D. Grossman
Keyword(s):  
Pulmonary Angiography ◽  
Thromboembolic Disease ◽  
Ct Venography

Benefit of CT venography for the diagnosis of thromboembolic disease

2007 ◽  
Vol 31 (4) ◽  
pp. 253-258 ◽  
Author(s):  
Kyung Hwa Rhee ◽  
Ramesh S. Iyer ◽  
Susan Cha ◽  
David P. Naidich ◽  
Henry Rusinek ◽  
...  
Keyword(s):  
Thromboembolic Disease ◽  
Ct Venography

Conversion from dose-length product to effective dose in computed tomography venography of the lower extremities

2022 ◽  
Author(s):  
Yusuke Inoue ◽  
Yuka Yonekura ◽  
Kazunori Nagahara ◽  
Ayuka Uehara ◽  
Hideki Ikuma
Keyword(s):  
Computed Tomography ◽  
Effective Dose ◽  
Conversion Factor ◽  
Lower Extremities ◽  
Pulmonary Angiography ◽  
Ct Scanner ◽  
Dose Length Product ◽  
Ct Venography ◽  
Simplified Method ◽  
Imaging Conditions

Abstract For radiation dose assessement of computed tomography (CT), effective dose (ED) is often estimated by multiplying the dose-length product (DLP), provided automatically by the CT scanner, by a conversion factor. We investigated such conversion in CT venography of the lower extremities performed in conjunction with CT pulmonary angiography. The study subjects consisted of eight groups imaged using different scanners and different imaging conditions (five and three groups for the GE and Siemens scanners, respectively). Each group included 10 men and 10 women. The scan range was divided into four anatomical regions (trunk, proximal thigh, knee and distal leg), and DLP was calculated for each region (regional DLP). Regional DLP was multiplied by a conversion factor for the respective region, to convert it to ED. The sum of the ED values for the four regions was obtained as standard ED. Additionally, the sum of the four regional DLP values, an approximate of the scanner-derived DLP, was multiplied by the conversion factor for the trunk (0.015 mSv/mGy/cm), as a simplified method to obtain ED. When using the simplified method, ED was overestimated by 32.3%−70.2% and 56.5%−66.2% for the GE and Siemens scanners, respectively. The degree of overestimation was positively and closely correlated with the contribution of the middle and distal portions of the lower extremities to total radiation exposure. ED/DLP averaged within each group, corresponding to the conversion factor, was 0.0089−0.0114 and 0.0091−0.0096 mSv/mGy/cm for the GE and Siemens scanners, respectively. In CT venography of the lower extremities, ED is greatly overestimated by multiplying the scanner-derived DLP by the conversion factor for the trunk. The degree of overestimation varies widely depending on the imaging conditions. It is recommended to divide the scan range and calculate ED as a sum of regional ED values.

Comparison of Iodixanol with Iohexol for Delayed Pelvic Venous Opacification:A Preliminary Study of Potential Use for CT Venography

2004 ◽  
Vol 183 (1) ◽  
pp. 123-126 ◽  
Author(s):  
Steven J. Michel ◽  
Andrew M. Fried ◽  
Shamyshree Sinha ◽  
John Willson ◽  
Eric Bensadoun ◽  
...  
Keyword(s):  
Ct Venography ◽  
Preliminary Study ◽  
Potential Use

scholarly journals CT venography and pathological characterization of crus haemorrhage in Pekin ducks

2019 ◽  
Vol 48 (2) ◽  
pp. 148-156
Author(s):  
Yao Shi ◽  
Yaru Zhang ◽  
Jiabao Lin ◽  
Xinyi Zhu ◽  
Zhaofei Xia
Keyword(s):  
Ct Venography ◽  
Pekin Ducks
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