Journal
EUROPEAN RADIOLOGY
Volume 20, Issue 4, Pages 801-806Publisher
SPRINGER
DOI: 10.1007/s00330-009-1628-7
Keywords
Multidetector-row computed tomography; Computed tomography angiography; Pulmonary embolism; Computer-assisted diagnosis; Pulmonary arteries
Funding
- Philips Medical Systems
Ask authors/readers for more resources
The purpose of the study was to assess the stand-alone performance of computer-assisted detection (CAD) for evaluation of pulmonary CT angiograms (CTPA) performed in an on-call setting. In this institutional review board-approved study, we retrospectively included 292 consecutive CTPA performed during night shifts and weekends over a period of 16 months. Original reports were compared with a dedicated CAD system for pulmonary emboli (PE). A reference standard for the presence of PE was established using independent evaluation by two readers and consultation of a third experienced radiologist in discordant cases. Original reports had described 225 negative studies and 67 positive studies for PE. CAD found PE in seven patients originally reported as negative but identified by independent evaluation: emboli were located in segmental (n = 2) and subsegmental arteries (n = 5). The negative predictive value (NPV) of the CAD algorithm was 92% (44/48). On average there were 4.7 false positives (FP) per examination (median 2, range 0-42). In 72% of studies a parts per thousand currency sign5 FP were found, 13% of studies had a parts per thousand yen10 FP. CAD identified small emboli originally missed under clinical conditions and found 93% of the isolated subsegmental emboli. On average there were 4.7 FP per examination.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available