Fig. 6

As compared with water, the uniformity of the mid to high echoic contrast agent may improve ultrasound visualization of hypoechoic gastric tumors. a Because the echo intensity of the tumor was similar to that of the gastric fluid floating above the cellulose-based contrast agent, visualization of the hypoechoic tumor was blurred and unclear. b The uniformity of the mid to high echoic contrast agent could improve ultrasound visualization of the hypoechoic gastric tumors. Arrow, pointing at the hypoechoic tumor