Medical image display apparatus and control method therefor

Abstract

A medical image display apparatus which displays, in a display screen, a display image having undergone gray level transform of changing number of gray levels of a medical image, obtains a representative value of pixel values concerning a region of a block, in the medical image, which corresponds to each partial region in a region designated in the display image. The medical image display apparatus sets a specific region in the display screen so as to include the designated region, and superimposes/displays and arranges obtained representative values on the specific region in correspondence with the arrangement of the partial regions.

1 . A medical image display apparatus which displays, in a display screen, a display image having undergone gray level transform that is changing number of gray levels of a medical image, the apparatus comprising:
 an obtaining unit configured to obtain a representative value of pixel values concerning a region of a block, in the medical image, which corresponds to each partial region in a region designated in the display image;   a setting unit configured to set a specific region in the display screen so as to include the designated region; and   a display control unit configured to superimpose/display and arrange representative values obtained by the obtaining unit on the specific region in correspondence with an arrangement of the partial regions.   
     
     
         2 . The apparatus according to  claim 1 , wherein the display control unit displays the representative value in a display form corresponding to the representative value when superimposing/displaying the representative value. 
     
     
         3 . The apparatus according to  claim 2 , wherein the display control unit changes the display form of the representative value in accordance with a value obtained by processing the representative value by the gray level transform. 
     
     
         4 . The apparatus according to  claim 2 , wherein the display control unit classifies representative values into a plurality of groups and changes a display form of a representative value in accordance with a group to which the representative value belongs. 
     
     
         5 . The apparatus according to  claim 4 , wherein the plurality of groups comprise ranges of values classified in correspondence with components in a body. 
     
     
         6 . The apparatus according to  claim 2 , wherein a display form of the representative value is changed by changing a display form of a character string indicating the representative value. 
     
     
         7 . The apparatus according to  claim 2 , wherein a display form of the representative value is changed by changing a display form of a frame border surrounding the character string indicating the representative value. 
     
     
         8 . The apparatus according to  claim 1 , further comprising a generation unit configured to generate an enlarged image of the designated region,
 wherein the display control unit superimposes/displays the enlarged image on the specific region at a predetermined transmittance.   
     
     
         9 . The apparatus according to  claim 1 , further comprising a generation unit configured to generate an enlarged image of a region, of the medical image, which corresponds to the designated region,
 wherein the generation unit forms a portion of each of enlarged blocks corresponding to the blocks of the medical image in the enlarged image into a transparent portion, and   the display control unit superimposes/displays the enlarged image on the specific region and superimposes/displays the representative value on a non-transparent region of each of the enlarged blocks.   
     
     
         10 . The apparatus according to  claim 9 , wherein the generation unit generates the enlarged image with a slit grating being formed in a lateral direction by forming one of lower and upper regions of the enlarged block into a transparent region. 
     
     
         11 . The apparatus according to  claim 9 , wherein the generation unit generates the enlarged image with a slit grating being formed in a vertical direction by forming one of right and left regions of the enlarged block into a transparent region. 
     
     
         12 . The apparatus according to  claim 9 , wherein the setting unit sets a position of the specific region so as to locate the designated region in a transparent region formed in the enlarged image. 
     
     
         13 . The apparatus according to  claim 1 , wherein the partial region and the block each comprise a one-pixel region, and
 the obtaining unit obtains a pixel value of a pixel of the block in the medical image as the representative value.   
     
     
         14 . The apparatus according to  claim 1 , wherein the partial region and the block each comprise a region comprising a plurality of pixels, and
 the obtaining unit obtains statistic(s) of a plurality of pixel values of the block of the medical image as the representative value(s).   
     
     
         15 . A method of controlling a medical image display apparatus which displays, in a display screen, a display image having undergone gray level transform of changing number of gray levels of a medical image, the method comprising:
 an obtaining step of obtaining a representative value of pixel values concerning a region of a block, in the medical image, which corresponds to each partial region in a region designated in the display image;   a setting step of setting a specific region in the display screen so as to include the designated region; and   a display control step of superimposing/displaying and arranging representative values obtained in the obtaining step on the specific region in correspondence with an arrangement of the partial regions.   
     
     
         16 . A non-transitory computer readable storage medium storing a program for causing a computer to execute a method of controlling a medical image display apparatus which displays, in a display screen, a display image having undergone gray level transform of changing number of gray levels of a medical image, the method comprising:
 an obtaining step of obtaining a representative value of pixel values concerning a region of a block, in the medical image, which corresponds to each partial region in a region designated in the display image;   a setting step of setting a specific region in the display screen so as to include the designated region; and   a display control step of superimposing/displaying and arranging representative values obtained in the obtaining step on the specific region in correspondence with an arrangement of the partial regions.