Image Segmentation for Anatomic Definition of Processing Parameters

Segmentation of an image is the process whereby an image is divided into separate regions, either by hand or computer, based on some identified differ

Figure 12 Segmentation for anatomy-based image processing. In this study, a normal screen-film chest radiograph has been digitized (a). It has then been processed so that the lungs are segmented from the image for organ-specific image processing

(b). By doing this, the processing for the mediastinum and the lungs can be different. In this case, the mediastinum and upper abdomen were processed to have a greater optical density and more edge enhancement than the lungs. The retrocardiac region (particularly the vessels), chest wall, and abdomen have been enhanced. (Experimental work of the author, S. C. B. Lo, and H. Zhao.)

Figure 12 Segmentation for anatomy-based image processing. In this study, a normal screen-film chest radiograph has been digitized (a). It has then been processed so that the lungs are segmented from the image for organ-specific image processing

(b). By doing this, the processing for the mediastinum and the lungs can be different. In this case, the mediastinum and upper abdomen were processed to have a greater optical density and more edge enhancement than the lungs. The retrocardiac region (particularly the vessels), chest wall, and abdomen have been enhanced. (Experimental work of the author, S. C. B. Lo, and H. Zhao.)

ence between them. In the chest, work is underway to segment the mediastinum, rib boundary of the lungs, and the lungs themselves [21,22,23]. Once these areas are segmented, different image-processing techniques could be applied to these different regions (Fig. 12). The segmented areas could be adjusted to have different black/white scales, different degrees of edge enhancement, and/or different contrast scales.

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