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
Korean Journal of Radiology
; : 183-193, 2013.
Article
de En
| WPRIM
| ID: wpr-15370
Bibliothèque responsable:
WPRO
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.
Mots clés
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Iohexol
/
Phlébographie
/
Tomodensitométrie
/
Modèles linéaires
/
Études de faisabilité
/
Statistique non paramétrique
/
Fantômes en imagerie
/
Produits de contraste
/
Thrombose veineuse
/
Membre inférieur
Type d'étude:
Guideline
Limites du sujet:
Female
/
Humans
/
Male
langue:
En
Texte intégral:
Korean Journal of Radiology
Année:
2013
Type:
Article