CT Venography for Deep Vein Thrombosis Using a Low Tube Voltage (100 kVp) Setting Could Increase Venous Enhancement and Reduce the Amount of Administered Iodine.
10.3348/kjr.2013.14.2.183
- Author:
Eun Suk CHO
1
;
Jae Joon CHUNG
;
Sungjun KIM
;
Joo Hee KIM
;
Jeong Sik YU
;
Choon Sik YOON
Author Information
1. Department of Radiology, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul 135-720, Korea. jjchung@yuhs.ac
- Publication Type:Original Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
- Keywords:
CT venography;
Deep vein thrombosis;
Low tube voltage;
Contrast medium;
Contrast enhancement
- MeSH:
Contrast Media/administration & dosage;
Feasibility Studies;
Female;
Humans;
Iohexol/administration & dosage/analogs & derivatives;
Linear Models;
Lower Extremity/blood supply/*radiography;
Male;
Middle Aged;
Phantoms, Imaging;
Phlebography/*methods;
Statistics, Nonparametric;
Tomography, X-Ray Computed/*methods;
Venous Thrombosis/*radiography
- From:Korean Journal of Radiology
2013;14(2):183-193
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To investigate the validity of the 100 kVp setting in CT venography (CTV) in the diagnosis of deep vein thrombosis (DVT), and to evaluate the feasibility of reducing the amount of administered iodine in this setting. MATERIALS AND METHODS: After receiving the contrast medium (CM) of 2.0 mL/kg, 88 patients underwent CTV of the pelvis and lower extremities by using one of four protocols: Group A, 120 kVp setting and 370 mgI/mL CM; group B, 120 kVp and 300 mgI/mL; group C, 100 kVp and 370 mgI/mL; group D, 100 kVp and 300 mgI/mL. The groups were evaluated for venous attenuation, vein-to-muscle contrast-to-noise ratio (CNRVEIN), DVT-to-vein contrast-to-noise ratio (CNRDVT), and subjective degree of venous enhancement and image quality. RESULTS: Venous attenuation and CNRVEIN were significantly higher in group C (144.3 Hounsfield unit [HU] and 11.9), but there was no significant difference between group A (118.0 HU and 8.2) and D (122.4 HU and 7.9). The attenuation value of DVT was not significantly different among the four groups, and group C had a higher absolute CNRDVT than the other groups. The overall diagnostic image quality and venous enhancement were significantly higher in group C, but there was no difference between groups A and D. CONCLUSION: The 100 kVp setting in CTV substantially help improve venous enhancement and CNRVEIN. Furthermore, it enables to reduce the amount of administered iodine while maintaining venous attenuation, as compared with the 120 kVp setting.
