Figure 1.

The measurement of the elastic modulus (EM) with Venustron system. (a) Each of three points are measured for the EM of the cancer tissue and normal tissue. The center of the ulcer floor is selected for the cancer tissue. A point more than 3 cm distant from the tumor is selected for normal tissue. (b, c) The EM of the specimen was calculated automatically by Venustron system. The probe is pressing vertically toward the mucosal side surface of the cancer with a depth of pressure of 4 mm and a resonant frequency of 50 Hz.