| QIAN Yu-e,HU Hong-jie,HU Peng,CHEN Bin,GAO Hang-xiang,CHEN Xiao-rong,SHEN Guo-hui,YE You-xin.Hemodialysis access CT angiography: feasibility of using 80 kV with reduced contrast medium[J].Chinese Journal of Radiological Medicine and Protection,2013,33(2):201-204 |
| Hemodialysis access CT angiography: feasibility of using 80 kV with reduced contrast medium |
| Received:October 06, 2012 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.02.024 |
| KeyWords:CT Radiation dose Hemodialysis access Angiography |
| FundProject: |
| Author Name | Affiliation | E-mail | | QIAN Yu-e | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | | | HU Hong-jie | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | hongjiehu@zju.edu.cn | | HU Peng | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | | | CHEN Bin | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | | | GAO Hang-xiang | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | | | CHEN Xiao-rong | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | | | SHEN Guo-hui | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | | | YE You-xin | Department of Radiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou 310016, China | |
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| Abstract:: |
| Objective To evaluate the feasibility of low-kilovoltage combined with reduced contrast medium in hemodialysis access CT angiography.Methods Forty patients with maintained hemodialysis (BMI≤25 kg/m2) were enrolled and divided into two groups. The protocol including 80 kV and CM dosage of 0.42 gI/kg was used in group A (first 20 patients). The protocol including 120 kV and CM dosage of 0.525 gI/kg was used in group B (last 20 patients). The patient was supine with the target arm aside the body and the other arm over the head. The contrast medium (350 mgI/ml) was administrated with the rate of 3.5 ml/s from the other arm vein. The cephalo-caudal scan was triggered with tracing technique. The CT values of artery and neighbouring muscle with ROIs in there levels (middle humerus, elbow, and middle radius) were respectively measured, and SNR and CNR were calculated. The CTDIvol and DLP were recorded. Results The mean CT value of the artery in group A(444.65±75.76)HU, was higher than that in group B (278.20±42.95)HU(t=7.70, P＜0.05). The mean CT value of peripheral muscle (57.05±7.71)HU in group A was higher than that in group B (51.55±5.81)HU (t=2.325, P＜0.05).There were no statistical differences of SNR and CNR between the two groups. The CTDIvol and DLP in group A[(2.87±0.37) mGy,(196.44±28.83)mGy·cm] were significantly smaller than those in group B[(7.86±1.61) mGy,(521.14±101.73) mGy·cm (t=-12.380, -12.636, P＜0.05)]. Two radiologists reached a good agreement on evaluating image quality(K=0.76,P＜0.05). Conclusions The CTA protocol with 80 kV and reduced contrast medium could be used for evaluating the hemodialysis access in patients with BMI≤25 kg/m2. |
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