IEC TS 62558:2011 pdfダウンロード。Ultrasonics – Real-time pulse-echo scanners – Phantom with cylindrical, artificial cysts in tissue-mimicking material and method for evaluation and periodic testing of 3D-distributions of void-detectability ratio (VDR) Scope This technical specification specifies essential characteristics of a phantom and method forthe measurement of void-detectability ratio for medical ultrasound systems and relatedtransducers. lt is restricted to the aspect of long-term reproducibility of testing results. This technical specification establishes: important characteristics and requirements for a TMM 3D artificial cyst phantom usinganechoic voids; a design example of a 3D artificial cyst phantom, the necessary test equipment and use otrelevant computer software...