Application of energy subtract angiography of dual source CT in diagnosis of arterial diseases of the lower extremities
10.3321/j.issn:1003-3289.2009.10.021
- VernacularTitle:双源CT双能量减影诊断下肢血管疾病
- Author:
Daowei LI
;
Wenli GUO
;
Zaiming LU
;
Wenxu QI
;
Qiyong GUO
- Publication Type:Journal Article
- Keywords:
Lower extremity arterial occlusive diseases;
Tomography;
X-ray computed;
Angiography;
digital subtraction
- From:
Chinese Journal of Medical Imaging Technology
2009;25(10):1806-1809
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the value of dual source CT (DSCT) dual energy subtract method in diagnosis of lower extremity arterial occlusion. Methods Thirty-two patients with lower extremity arterial occlusive diseases underwent DSCT direct bone removal CT angiography (DE-BR-CTA) and digital subtraction angiography (DSA) within 2 weeks. Raw data were reconstructed with techniques including MIP and VR. Arterial visibility of DE-BR-CTA was analyzed by two experienced radiologists taking DSA as the standard. Results A total of 328 arterial segments were selected in 32 patients with lower extremity arterial occlusive diseases. The correlation between DSA and DE-BR-CTA was good. There was no significant difference in arterial visibility between DE-BR-CTA and DSA (P＞0.05). Compared with DSA, 12 of the segmental stenosis were overestimated and 6 were underestimated with DE-BR-CTA. When stenosis was over 10%, the accuracy, sensitivity, specificity, positive predictive value and negative predictive value of DE-BR-CTA was 94.51%, 96.15%, 93.02%, 92.59% and 96.39%, respectively. Conclusion DSCT energy subtraction angiography is an accurate diagnostic method and non-invasive imaging technology in the assessment of lower extremity arterial occlusive diseases. It may provide precious information for pre-surgery evaluation and screening the arterial diseases of the lower extremities.
