Echographic study of pediatric patients with acute abdominal syndrome convex probe is advantageously carried out at a frequency of 5 MHz and 7.5-MHz linear transducer. Both sensors combine sufficient depth of penetration (about 6-10 cm) with high image quality. Sensor 5 MHz is used for the scoping study and the sensor is 7.5 MHz to produce detailed images of structures right iliac region.

Using the last sensor is preferred, since during the compression of the anterior abdominal wall transformed inflammatory appendix is typically at a depth of not more than 20 mm from the skin surface. According to some authors, it is optimal to use a T-sensor. The shape and small size, in combination with the configuration of the beam makes it preferable for use in pediatric patients.