| 摘要 |
PURPOSE: To provide an ultrasonic diagnostic system with fast rewrite speed for diagnosis image frame memory and capable of performing the real time observation of internal organs which exercise deformation motion in a short period such as the heart, etc. CONSTITUTION: An ultrasonic diagnostic system of digital scan converter system is constituted of a field switching circuit which selects the rewrite picture element range of the diagnosis image frame memory under the management of a scan control part 4 for a sound field, an address sampling part 43 which selects and samples sampling data used in an arithmetic operation to find picture element data within a selected rewrite target range from an echo data buffer 5, and a write address generating part 44 which generates the address of the diagnosis image frame memory in which the picture element data found by the arithmetic operation is stored by the command of the field switching circuit. A half picture element selected so as to be distributed uniformly from picture element arrangement corresponding to sound field scan is rewritten alternately. |
