How to determine Pixel Size

Hi everyone can help me? I have image (PET) in format dicom 256x256 dimension. then the min pixel is 0 and the max pixel is 32657. Actually, what is the no meaning? 1) is it means the dose? 2) or intensity of the beam or radiation? 3) and what is the unit of that pixel no?

Answer 1

[Walter Roberson]

You need to access one of the dicom headers to find out what the numbers represent. See http://dicom.nema.org/medical/Dicom/2016b/output/chtml/part03/sect_C.8.9.html

[mohd akmal masud]

Thak you so much Walter Roberson.

[mohd akmal masud]

Sorry all, another question i have but i wrote at this space. please help me

Dear all,

this is my code to view CT image by slice

P = zeros(256, 256, 72);
for K = 1 : 72
    petname = sprintf('I4%03d.dcm', K);
    P(:,:,K) = dicomread(petname);
end
imshow3D(P)

then, this is my code for view SPECT image by slice,

Noted: all my 42 slice SPECT image stored in one file.

[spect map]=dicomread('128x128');
info = dicominfo('128x128');
gp=info.SliceThickness;
spect=(squeeze(spect));%smooth3
aa=size(spect);aa=aa(3);
imshow3D(spect);

Anybody can help me to fuse both SPECT and CT images for all slice?