Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1 Poongnap2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea.
Eur Radiol. 2011 Jan;21(1):54-62. doi: 10.1007/s00330-010-1903-7. Epub 2010 Aug 1.
To evaluate the sensitivity of computer-aided detection(CAD) and dual-energy software('Lung PBV', 'Lung Vessels') for detecting peripheral pulmonary embolism(PE).
Between Jan-2007 and Jan-2008, 309 patients underwent dual-energy CT angiography(DECTA) for the evaluation of suspected PE. Among them, 37 patients were retrospectively selected; 21 with PE at segmental-or-below levels and 16 without PE according to clinical reports. A standard computer assisted detection (CAD) package and two new types of software('Lung PBV', 'Lung Vessels') were applied on a dedicated workstation. This resulted in four alternative tests for detecting PE: DECTA alone and DECTA with CAD, 'Lung Vessels' and 'Lung PBV'. Two radiologists independently read all cases at different reading sessions. Two thoracic radiologists set the reference standard by combining all information from DECTA and software. The sensitivity of detection for all, segmental and subsegmental-or-below PE were assessed.
The reference standard contained 136 PE(segmental 65, subsegmental-or-below 71). With DECTA alone, the sensitivity of detection for all, segmental and subsegmental-or-below pulmonary arteries was 54.5%/73.7%/34.4%; DECTA with CAD, 57.8%/76.8%/37.9%; DECTA with 'Lung PBV', 61.1%/79.9%/41.4%; DECTA with 'Lung Vessels', 64.0%/78.3%/48.5% respectively.
The use of CAD, Lung Vessels and Lung PBV shows improved capability to detect peripheral PE.
评估计算机辅助检测（CAD）和双能软件（“肺 PBV”、“肺血管”）检测外周型肺栓塞（PE）的灵敏度。
2007 年 1 月至 2008 年 1 月期间，309 例患者行双能 CT 血管造影（DECTA）检查以评估疑似 PE。其中，回顾性选择了 37 例患者，根据临床报告，21 例患者在段或段以下水平有 PE，16 例患者无 PE。应用标准计算机辅助检测（CAD）包和两种新型软件（“肺 PBV”、“肺血管”）在专用工作站上进行。这产生了四种检测 PE 的替代方法：单独进行 DECTA 检查、单独进行 DECTA 检查并使用 CAD、使用“肺血管”和“肺 PBV”。两位放射科医生在不同的阅读会议上独立阅读所有病例。两位胸部放射科医生通过结合 DECTA 和软件的所有信息来制定参考标准。评估了所有、节段性和亚节段性或以下 PE 的检测灵敏度。
参考标准包含 136 例 PE（节段性 65 例，亚节段性或以下 71 例）。单独进行 DECTA 检查时，所有、节段性和亚节段性或以下肺动脉的检测灵敏度分别为 54.5%/73.7%/34.4%；使用 CAD 时为 57.8%/76.8%/37.9%；使用“肺 PBV”时为 61.1%/79.9%/41.4%；使用“肺血管”时为 64.0%/78.3%/48.5%。
CAD、肺血管和肺 PBV 的使用显示出提高外周型 PE 检测能力。
