Gemstone Spectral CT Optimal Single Energy Imaging in Lower Extremity Angiography
10.3969/j.issn.1005-5185.2014.11.011
- VernacularTitle:宝石CT能谱最佳单能量图像在下肢动脉造影中的应用
- Author:
Wei XIA
;
Xusheng SONG
;
Xiaorui YIN
;
Ruixue LI
;
Jingtao WU
- Publication Type:Journal Article
- Keywords:
Arterial occlusive diseases;
Lower extremity;
Tomography,X-ray computed;
Gemstone spectral imaging;
Quality control
- From:
Chinese Journal of Medical Imaging
2014;(11):842-845
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To implement lower artery angiography in patients with peripheral arterial occlusive disease, and to investigate the feasibility of lower extremity gemstone spectral CT angiography in improving image quality.Materials and Methods Forty-eight patients suspected with lower extremity arterial occlusive diseases were randomly divided into research group and control group. Research group (24 cases) were carried out gemstone spectral CT angiography (CTA) scan and control group (24 cases) were scanned with multi-slice spiral CT (CTA). The CT value of the common iliac artery, popliteal artery and its branches was measured and contrast to noise ratio (CNR) were calculated in both groups. The images were evaluated independently by 2 senior physicians based on a 5-level evaluation standard.Results The CT value of common iliac artery, popliteal artery, anterior tibial artery and the CNR in research group were all higher than those in control group (t=8.7, 7.9, 12.6 and 17.2,P<0.01), but the background noise was lower than that in control group (t=1.5,P<0.01). The scores of two image quality accessed by physician 1 and 2 were 110:90 and 111:93 respectively with statistical difference (Z=-7.6 and-8.0, P<0.01).Conclusion The image obtained by gemstone spectral CT optimal single energy image technique is much better than that by conventional multi-slice spiral CT in lower extremity angiography.
