How to change the pixel value int16 to new value?

Question

mohd akmal masud 2022-4-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1707365-how-to-change-the-pixel-value-int16-to-new-value

回答： Image Analyst 2023-9-7

SPECTCTLD_EM_IRNCRR001_DS.zip

在 MATLAB Online 中打开

Dear All,

I have image dicom. as attached. dimension is 128x128, have 45 frame. the type is int16.

I want to convert all the pixel value with new value IMG_cps as code below (the last one).

Anyone can help me?

clc
clear all
close all
Image_name = 'SPECTCTLD_EM_IRNCRR001_DS.dcm';  % add your file name
%% read dicom image
IMG = dicomread(Image_name);    
IMG = double(IMG);              % chage data type double
%% read dicom information 
INFO = dicominfo(Image_name);   
% time per projection
Time_per_projection = double(INFO.RotationInformationSequence.Item_1.ActualFrameDuration); % in msec
Time_per_projection = Time_per_projection/1000; % convert to sec
% number of projection
Num_projection = double(INFO.RotationInformationSequence.Item_1.NumberOfFramesInRotation);  
% calculate acquisition time
Acquistion_duration = Time_per_projection * Num_projection;   % sec
%% calculate cps in each pixel
IMG_cps = IMG/Acquistion_duration;