Techniques on semiautomatic segmentation using the Adobe Photoshop

The purpose of this research is to enable anybody to semiautomatically segment the anatomical structures in the MRIs, CTs, and other medical images on the personal computer. The segmented images are used for making 3D images, which are helpful in medical education and research. To achieve this purpose, the following trials were performed. The entire body of a volunteer was scanned to make 557 MRIs. On Adobe Photoshop, contours of 19 anatomical structures in the MRIs were semiautomatically drawn using MAGNETIC LASSO TOOL and manually corrected using either LASSO TOOL or DIRECT SELECTION TOOL to make 557 segmented images. In a likewise manner, 13 anatomical structures in the 8,590 anatomical images were segmented. Also 12 anatomical structures in the 790 brain anatomical images and 10 anatomical structures in the 640 heart anatomical images were segmented. Proper segmentation was verified by making 3D images from the segmented images. The semiautomatic segmentation using Adobe Photoshop is expected to be widely used for segmentation of the anatomical structures in various medical images.