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3 March 2009 Performance evaluation of an automatic segmentation method of cerebral arteries in MRA images by use of a large image database
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Proceedings Volume 7260, Medical Imaging 2009: Computer-Aided Diagnosis; 72602J (2009)
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States
The detection of cerebrovascular diseases such as unruptured aneurysm, stenosis, and occlusion is a major application of magnetic resonance angiography (MRA). However, their accurate detection is often difficult for radiologists. Therefore, several computer-aided diagnosis (CAD) schemes have been developed in order to assist radiologists with image interpretation. The purpose of this study was to develop a computerized method for segmenting cerebral arteries, which is an essential component of CAD schemes. For the segmentation of vessel regions, we first used a gray level transformation to calibrate voxel values. To adjust for variations in the positioning of patients, registration was subsequently employed to maximize the overlapping of the vessel regions in the target image and reference image. The vessel regions were then segmented from the background using gray-level thresholding and region growing techniques. Finally, rule-based schemes with features such as size, shape, and anatomical location were employed to distinguish between vessel regions and false positives. Our method was applied to 854 clinical cases obtained from two different hospitals. The segmentation of cerebral arteries in 97.1%(829/854) of the MRA studies was attained as an acceptable result. Therefore, our computerized method would be useful in CAD schemes for the detection of cerebrovascular diseases in MRA images.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yoshikazu Uchiyama, Tatsunori Asano, Takeshi Hara, Hiroshi Fujita, Yasutomi Kinosada, Takahiko Asano, Hiroki Kato, Masayuki Kanematsu, Hiroaki Hoshi, and Toru Iwama "Performance evaluation of an automatic segmentation method of cerebral arteries in MRA images by use of a large image database", Proc. SPIE 7260, Medical Imaging 2009: Computer-Aided Diagnosis, 72602J (3 March 2009);

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