How to Use and Evaluate the Ultrasonic Quality Control Phantom for Daily Inspection(US-4B)supervised by JABTS.

Abstract

　Ultrasonic systems deteriorate slowly. The Research group to Examine Quality Control Phantom of the Japan Association of Breast and Thyroid Sonology developed a phantom for the purpose of objective quality control of body surface ultrasound images, and completed the Ultrasonic Quality Control Phantom for Daily Inspection（US-4B）in November 2021. Although it is a simple tool for judging the management of image degradation over time, it is very important to be familiar with the correct use, method, and system of evaluation.
　The purpose of use of the quality control phantom and precautions for its use are described, and the actual quality control method studied by the research group is reported.