Nuclear medical imaging apparatus, image processing apparatus, and image processing method

摘要

A two-dimensional look-up-table (LUT) storage unit stores a two-dimensional LUT in which each combination of two input values is associated with an output value for outputting a different color tone. A registration unit registers Positron Emission Tomography (PET) images of examination 1 and examination 2 by using X-ray CT images of the examination 1 and the examination 2; and an output-image creating unit acquires from the two-dimensional LUT an output value where input values are a combination of pixel values of corresponding pixels between the registered PET images, and creates an output image. Moreover, the output-image creating unit creates the output image from output values within a setting range specified on the two-dimensional LUT, among acquired output values. A display control unit controls display such that an output image or a composite image of an output image and an X-ray CT image created by a composite-image creating unit is to be displayed on a monitor.

主权项

1. A nuclear medical imaging apparatus, comprising:
a nuclear medical scanner configured to obtain projection data by detecting radiation emitted by a nuclide given to a subject; a processing circuit configured to create first and second nuclear medical images of a portion of the subject from the obtained projection data; and a memory to store two-dimensional association information in which each of combinations of two first values is associated with a second value for outputting an associated color tone, wherein the associated color tone for a first combination is different from the associated color tone for a second combination even though a difference value between the two first values of said first combination is identical to a difference value between the two first values of the second combination, wherein the processing circuit is further configured to
execute registration of the first nuclear medical image and the second nuclear medical image, the first and second nuclear medical images being created in two different time periods, the registration being based on a first tissue image of the portion of the subject acquired at a time of acquisition of the first nuclear medical image and a second tissue image of the portion of the subject acquired at a time of acquisition of the second nuclear medical image,acquire a plurality of output values, each output value being determined from a pair of input values that are two pixel values of corresponding pixels of the first nuclear medical image and the second nuclear medical image that are registered by the processing circuit, from the two-dimensional association information stored by the memory, and to create an output nuclear medical image having pixel values that are the acquired output values, andcontrol a display to display the output nuclear medical image.