Diagnostic Efficiency of Low-Dose CT Angiography Compared With Conventional Angiography in Peripheral Arterial Occlusions

作者

Duan, YH;Wang, XM;Yang, XC;Wu, DW;Cheng, ZP;Wu, LB

作者单位

[Duan, Yanhua] Shandong Univ, Sch Med, Jinan 250100, Shandong, Peoples R China.;-;[Duan, Yanhua; Wang, Ximing; Wu, Dawei; Cheng, Zhaoping; Wu, Lebin] Shandong Med Imaging Res Inst, Shandong Prov Key Lab Diag, Jinan 250021, Shandong, Peoples R China.;-;[Duan, Yanhua; Wang, Ximing; Wu, Dawei; Cheng, Zhaoping; Wu, Lebin] Shandong Med Imaging Res Inst, Dept CT Treatment Cardiocerebral Vasc Dis, Jinan 250021, Shandong, Peoples R China.;-;[Yang, Xiancun] Shandong Prov Hosp, Dept Intervent Radiol, Jinan, Shandong, Peoples R China.

摘要

OBJECTIVE. The purpose of this study was to assess the diagnostic efficiency and radiation dose of peripheral arterial CT angiography (CTA) performed at a low tube voltage of 70 kV in comparison with conventional angiography.;-;SUBJECTS AND METHODS. Thirty consecutive patients (body mass index <= 25 kg/m(2)) with known or suspected peripheral arterial occlusion diseases underwent both CTA at a low tube voltage of 70 kV and conventional angiography. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of peripheral arterial CTA were evaluated. The radiation dose was recorded.;-;RESULTS. Diagnostic CTA images were obtained in all patients. CTA allowed accurate identification, characterization, and measurement of all peripheral arterial occlusive diseases. In conventional angiography, 360 diseased segments were found among the 810 segments evaluated. The sensitivity, specificity, PPV, NPV, and accuracy of CTA were 100% (95% CI, 98.81-100%), 93.5% (90.96-95.36%), 90.86% (87.38-93.45%), 100% (99.17-100%), and 96.05% (94.48-97.19%), respectively, with a kappa value of 0.92 (excellent agreement). The mean CT dose index was 3.71 +/- 0.8 mGy, and the dose-length product was 446.6 +/- 35.7 mGy x cm. The effective dose was 1.94 +/- 0.21 mSv for CTA and 4.41 +/- 0.64 mSv for conventional angiography.;-;CONCLUSION. CTA of peripheral arteries with a low tube voltage of 70 kV provides reliable information and serves as a rapidly performed and easily available "one-stop-shop" imaging modality in the diagnosis of peripheral arterial occlusion diseases.

关键词

DIGITAL-SUBTRACTION-ANGIOGRAPHY; COMPUTED-TOMOGRAPHY ANGIOGRAPHY; LOWER-EXTREMITY ARTERIES; IMAGE QUALITY; LOW-KILOVOLTAGE; MR-ANGIOGRAPHY; CHEST CT; MULTIDETECTOR; DISEASE; ENHANCEMENT

基本信息

所属机构:

归属医师: 杨显存

PMID：24261398

UT：000327501500014

刊名:AMERICAN JOURNAL OF ROENTGENOLOGY

年，卷(期):2013年201卷6期

页码：W906-W914

DOI：10.2214/AJR.12.10209

附件： pdf

收录: SCIE