store mask created from roipoly on scans running in for loop, in new variable

I have a series of mri scans stored in a 256 x256 x 19 variable. Each scan in the series has a different ROI that I want to mask out using roipoly. Is there a way that I can turn this code into a for loop to mask out the roi and store the output mask eg. tumor1, tumor2, tumor3 for each scan in a separate variable after each iteration?

%%

[tumor2, x2, y2] = roipoly(segmentT2Flair(:,:,2));

%%

[tumor3, x3, y3] = roipoly(segmentT2Flair(:,:,3));

%%

[tumor4, x4, y4] = roipoly(segmentT2Flair(:,:,4));

%%

[tumor5, x5, y5] = roipoly(segmentT2Flair(:,:,5));

%%

% mask over tumor ROI

%segment_mask = poly2mask(xi, yi, 256, 256); %creates a mask based on dimensions

segment_mask = cat(3,tumor1, tumor2, tumor3, tumor4, tumor5, tumor6, tumor7, tumor8, tumo

%%

for i = numslices:-1:1

[tumor(i), xi, yi] = roipoly(SegmentT2Flair(:,:,i)); %when i run this it only saves the mask and dimensions of the last slice not the 18 before

end

for i: numslices:-1:1 %in this loop the images are outputted as jpg but not stored in matlab array and dimensions are not stored

[tumor] = roipoly(SegmentT2Flair(:,:,i))

filename = ['Segmented', num2str(i), '*.jpg']

saveas(1, filename);

hold off

Answer 1

[KALYAN ACHARJYA]

You can store the mask in cell array and later call any mask as per requiremnets.

n=?? % define
mask=cell(1,n)
for i=1:n 
%Mask generation, say mask_data
mask{i}=mask_data
end

Noy you can any mask as later say mask{1}, mask{2}, so on.....

[Raheema Al Karim Damani]

thank you I did figure it out. Appreciate your assistance.