| 摘要 |
PURPOSE:To increase the number of frames and, simultaneously, to improve a raster direction resolution by providing a raster information collecting means to collect the raster information of a raster position to be different for each frame. CONSTITUTION:A raster generating part 9 is equipped with a function as the raster information collecting means to collect blood flow Doppler information as the raster information of the raster position to be different for each frame. The raster generating part 9 is equipped with a step generator 18 to set the number of steps of the raster position, a raster address initial value generating part 15 to set from where the raster position is started, a raster address counter 16 to count a raster address number, a multiplier 23 to multiply the counted value with the number of steps generated by the step generator 18, an adder 17 to add the output and the raster address initial value, a raster total number generator 19 to set the total number of rasters to compose one frame, and a comparator 20 to compare the addition result of the adder 17 with the total number of rasters at the raster total number generator 19. |
