Contrast harmonic endoscopic ultrasound: Instrumentation, echoprocessors, and echoendoscopes.

Endoscopic ultrasound (EUS) has become as one the best diagnostic and therapeutic methods for the management of several intraintestinal and extraintestinal diseases, among them to highlight pancreaticobiliary indications, mediastinal evaluation, and the analysis of gastrointestinal lesions. Over the years, there has been an enormous evolution in the systems available to perform EUS. Newer processors and echoendoscopes are available nowadays, with the ability to perform new imaging analysis, such as elastography and contrast enhancement. In the present article, we will review which systems are available nowadays, focusing also in the technical advances associated.