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A 3D Digital Model for the Diagnosis and Treatment of Pulmonary Nodules

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Computer-aided detection of lung nodules on multidetector CT in concurrent-reader and second-reader modes: a

Sumiaki Matsumoto¹, Yoshiharu Ohno, Takatoshi Aoki

¹Department of Radiology, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan. sumatsu@med.kobe-u.ac.jp

European Journal of Radiology

|March 14, 2013

Summary

Concurrent-reader computer-aided detection (CAD) for lung nodules on multidetector CT is faster than second-reader CAD. Both CAD modes show similar radiologist detection performance for lung nodules.

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Area of Science:

Radiology
Medical Imaging
Computer-Aided Detection

Background:

Computer-aided detection (CAD) systems are used to assist radiologists in identifying abnormalities.
Lung nodule detection on multidetector computed tomography (CT) is a critical diagnostic task.
Evaluating different CAD modes, such as concurrent-reader and second-reader, is essential for optimizing workflow and performance.

Purpose of the Study:

To compare the reading times and detection performances of radiologists using concurrent-reader and second-reader CAD modes.
To assess the efficiency and accuracy of different CAD system configurations for lung nodule detection.

Main Methods:

Retrospective analysis of 50 multidetector CT datasets with 207 confirmed lung nodules.
Six radiologists (3 experienced, 3 residents) independently interpreted datasets using both concurrent-reader and second-reader CAD modes.
Jackknife free-response receiver operating characteristic (JAFROC) analysis was employed to compare detection performances.

Main Results:

Mean reading time was significantly shorter with concurrent-reader CAD (132s) compared to second-reader CAD (210s) (p<0.01).
No significant difference in detection performance was observed between the two CAD modes (JAFROC figure-of-merit: 0.70 for concurrent-reader vs. 0.72 for second-reader, p=0.35).

Conclusions:

Concurrent-reader CAD mode offers a significant time-saving advantage for radiologists interpreting lung nodules on multidetector CT.
The choice between concurrent-reader and second-reader CAD modes does not appear to impact the overall detection performance of radiologists.