HOW TO SAME THE RATIO

Hi all,

i have 60 image SPECT, and 203 image CT.

Dimension for SPECT is 103, and CT dimension is 256.

This coding below i develop for 3D.

But i got error at this ratio.

rats=size(RZ)./size( P(:,:,K) );

clear all
clc
warning off

 P = zeros(103, 103, 60);
for K = 1 : 60
    K_file=30+10*K;
    petname = sprintf('I%d.dcm', K_file);
    P(:,:,K) = dicomread(petname);
end


d=4;%first slice
Folder='ct';%input('***Please enter the CT/MRI data folder name : ','s');
aa=dir(num2str(Folder));
aa=struct2cell(aa);

Slice=size(aa);
Slice=Slice(2)-2;
f=1;ceil(Slice/300);% depands on PC capability 300 is optimum no of slice for this PC
c=round(Slice/f);%No of slices ...4yusoff
% clf
%RZ=zeros(round(400/f),round(500/f),round(c/f));
fprintf('\nReading images. Please wait...\n');
for a=d:1:Slice-1%Slice
    clc
    Percent=floor(a/(Slice-1)*100)
    as=[ Folder '\I' num2str(a*10)];
    [X, map]=dicomread([as]);
    info = dicominfo([as]);
    Y = dicomread(info);
    RZ(:,:,Slice-a+3)=Y;%(dpnblkg,kanankiri)
end

RZ=double(RZ);
[N M L]=size(RZ);
rats=size(RZ)./size( P(:,:,K) );
[x,y,z]=meshgrid(rats(1):rats(1):M,rats(1):rats(2):N,rats(1):rats(3):L);
RZ=interp3(RZ,x,y,z);

ANYONE CAN HELP ME?

[Geoff Hayes]

mohd - what is the error message? Please copy and paste the full error message to your question. If the error message is similar to Matrix dimensions must agree then the problem is possibly due to the dimensions of your numerator and denominator.

size(RZ)         % is this a 1x3?
size( P(:,:,K) ) % is this a 1x2? What is K?

[mohd akmal masud]

this is my error

Matrix dimensions must agree.

Error in spectviewvolumeanip (line 45)
rats=size(RZ)./size( P(:,:,K) );

[mohd akmal masud]

this is my K

 P = zeros(103, 103, 60);
for K = 1 : 60
    K_file=30+10*K;
    petname = sprintf('I%d.dcm', K_file);
    P(:,:,K) = dicomread(petname);
end

i have to do loop because my spect have 60 slice images

[mohd akmal masud]

because previous my dimension image for SPECT is 128, ant CT is 256.

Then my ratio like below

RZ=double(RZ);
[N M L]=size(RZ);
rats=size(RZ)./size( P(:,:,K) );
[x,y,z]=meshgrid(rats(1):rats(1):M,rats(1):rats(2):N,rats(1):rats(3):L);
RZ=interp3(RZ,x,y,z);

then its work

[KSSV]

Have a look on imresize. With this you can get the images to the same dimension.