<prompt> ULTRASOUND PROBE FREQUENCY 1. Linear a. 20 2. Endoscopic b. 10-12 3. Curvilinear c. 7-10 4. Endocavitatory d. 3-51-C, 2-D, 3-A, 4-B1-B, 2-C, 3-A, 4-D1-B, 2-A, 3-D, 4-C1-B, 2-C, 3-D, 4-A  <response>: Different types of Probes transducers Curvilinear probe Linear probe Endocavitary probe - 3-5 MHz Low frequency - Greater wavelength - Greater penetration - Poor resolution -Used for imaging deep structures e.g. kidney, ovary, fetal pas etc. - 10-12 MHz high frequency -Low wavelength - Poor penetration - Good resolution - Used for superficial structures e.g. thyroid, breast, scrotum etc. - 7- 10 MHz Good frequency - TVS Transvaginalsonography - TRUS Transrectalultrasound - TEE Trans esophagealechocardiography TVS Trans vaginal sonography IOC for Ectopic pregnancy Bladder must be empty before doing TVS - Endoscopic Ultrasound EUS Uses frequency of 20 MHZ Very good resolution Divides gut wall into 5 layers EUS is the IOC for local invasion or T staging of early esophageal cancer IOC for Advanced esophageal Carcinoma - CECT 