Abstract
We studied the feasibility of quantitative texture analysis on two dimensional echoic images in 9 cases of resected gastric cancers in order to differentiate medullary type from intermediate type. 4 cases of medullary type and 5 cases of intermediate type were studied. The echo system we used had a linear arrey probe, and the central frequency of this was 7.5MHz. On examination, the parameters of the system (gain control, etc.) were usually on the same level, and we scanned at about 2.5cm distance from the regions. Regions of interest were set on echo images of cancer tissue. The texture analysis we used was the grey level difference method. As a result, the grey level difference distribution of medullary type was seen from that of interemedite type and the error rate of discriminant analysis was found to be 10%. We would expect the usefulness of this method to be evident in endoscopic ultrasonography.
