Medical imaging apparatus

摘要

A medical imaging apparatus includes a reconstruction unit, a ROI setting unit, and a controller. The reconstruction unit receives projection data that is based on radiation detected by a detector, divides the projection data into a plurality of subsets, and apply a reconstruction process to the subsets by successive approximation to successively generate images. The ROI setting unit sets a ROI in the images. The controller obtains a variation value indicating a change in image quality from the images, and, when the variation value reaches a predetermined value, instructs the reconstruction unit on a new subset count less than the number of the subsets to sequentially reconstruct subsets as many as the new subset count into an image. The reconstruction unit assigns a weight to the projection data based on the ROI, and divides the projection data into the subsets based on the weight.

主权项

1. A medical imaging apparatus, comprising
a detector configured to detect radiation; and processing circuitry configured to
receive projection data that is based on the radiation detected by the detector, divide the projection data into a plurality of subsets, and apply a reconstruction process to the subsets by successive approximation to successively generate images,set a region of interest in the images, andobtain a variation value indicating a change in image quality from the images, and, when the variation value reaches a predetermined value, set a new subset count less than the number of the subsets, and sequentially reconstruct subsets as many as the new subset count into an image, wherein the processing circuitry is further configured to assign a weight to the projection data based on the region of interest, and divide the projection data into the subsets based on the weight.