Diagnostic accuracy and reading time to detect intracranial aneurysms on MR angiography using a computer-aided
Shingo Kakeda1, Yukunori Korogi, Hidetaka Arimura
1Department of Radiology, University of Occupational and Environmental Health School of Medicine, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan. kakeda@med.uoeh-u.ac.jp
Objective:
The objective of our study was to determine whether the use of a computer-aided diagnosis (CAD) system can shorten the reading time while maintaining the diagnostic performance of MR angiography for the detection of intracranial aneurysms.
Materials And Methods:
Fifty maximum-intensity-projection MR angiograms in 50 patients (16 intracranial aneurysms and 34 negative cases) were used for this observer performance study. Sixteen radiologists--eight neuroradiologists and eight less experienced radiologists--participated in the observer studies and interpreted the MR angiograms without and with CAD output images using an independent test method. The reading times without and with CAD were compared separately for the aneurysm and negative cases. The observers' performances were evaluated using receiver operating characteristic (ROC) analysis. We analyzed separately the data obtained from neuroradiologists and from less experienced radiologists.
Results:
For all observers, the mean area under the ROC curve (Az) with CAD was improved compared with that without CAD (0.903 vs 0.851, respectively; p = 0.109), and the mean reading time per case was reduced significantly by 18.1 seconds (28.5%) (from 63.4 to 45.3 seconds, p < 0.05). When CAD output images were available, the mean A(z) for the less experienced radiologists was significantly improved (0.911 vs 0.787, p < 0.05), but not for the neuroradiologists. The mean reading time of the less experienced radiologists with CAD was significantly shorter than that of the neuroradiologists without CAD (39.8 vs 54.5 seconds, p < 0.05).
Conclusion:
The use of a CAD system for the detection of intracranial aneurysms on MR angiography can shorten the reading time while improving diagnostic performance for less experienced radiologists.
Insights
Computer-aided diagnosis (CAD) systems can reduce MR angiography reading times for intracranial aneurysms. These systems improve diagnostic performance, especially for less experienced radiologists, without compromising accuracy.
Area of Science:
- Neuroradiology
- Medical Imaging Analysis
- Artificial Intelligence in Medicine
Background:
- Intracranial aneurysms pose significant diagnostic challenges in MR angiography.
- Accurate and efficient interpretation of MR angiography is crucial for timely diagnosis and treatment.
- Computer-aided diagnosis (CAD) systems offer potential improvements in medical image analysis.
Purpose of the Study:
- To evaluate the impact of a CAD system on reading time and diagnostic performance for MR angiography of intracranial aneurysms.
- To compare the effectiveness of CAD across different experience levels of radiologists.
Main Methods:
- A study involving 50 MR angiograms (16 aneurysms, 34 negative cases) interpreted by 16 radiologists (8 neuroradiologists, 8 less experienced).
- Radiologists interpreted images with and without CAD output using an independent test method.
- Reading times were compared, and diagnostic performance was assessed using receiver operating characteristic (ROC) analysis.
Main Results:
- Overall mean reading time per case was significantly reduced by 18.1 seconds (28.5%) with CAD.
- The mean area under the ROC curve (Az) improved with CAD (0.903 vs 0.851).
- Less experienced radiologists showed significantly improved diagnostic performance (Az: 0.911 vs 0.787) and reduced reading times with CAD.
Conclusions:
- CAD systems can shorten reading times for MR angiography of intracranial aneurysms.
- CAD significantly improves diagnostic performance for less experienced radiologists.
- CAD enhances the efficiency and accuracy of intracranial aneurysm detection in MR angiography.
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