(a) Photograph of experimental elastographic imaging system, consisting of a Sonixtouch tablet ultrasound scanner (BK Ultrasound, Peabody, MA, USA) equipped with a L40-8/12 probe (BK Ultrasound, Peabody) and a computer-controlled mechanical compression system. (b) Close-up of the transducer and excised xenograft tumor embedded in gelatin. (c) Rat with exposed orthotopically grown tumor.