MR-guided attenuation map for prostate PET-MRI: an intensity and morphologic-based segmentation approach for generating a five-class attenuation map in pelvic region

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• 作者：M. Shirin Shandiz ; H. Saligheh Rad ; P. Ghafarian…
• 关键词：PET/MRI ; MRI ; base attenuation correction ; STE pulse sequence ; Morphologic characteristics ; based segmentation ; Prostate imaging
• 刊名：Annals of Nuclear Medicine
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：31
• 期：1
• 页码：29-39
• 全文大小：
• 刊物主题：Nuclear Medicine; Imaging / Radiology;
• 出版者：Springer Japan
• ISSN：1864-6433
• 卷排序：31

文摘

PurposeProstate imaging is one of the major application of hybrid PET/MRI systems. Inaccurate attenuation maps (µ-maps) derived by direct segmentation (SEG) in which the cortical bone is ignored and the volume of the air in cavities is underestimated is the main challenge of commercial PET/MRI systems for the quantitative analysis of the pelvic region. The present study considered the cortical bone and air cavity along with soft tissue, fat, and background air in the µ-map of the pelvic region using a method based on SEG. The proposed method uses a dedicated imaging technique that increases the contrast between regions and a hybrid segmentation method to classify MR images based on intensity and morphologic characteristics of tissues, such as symmetry and similarity of bony structures.