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How to read multiples DICOM images

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Usama Javed 2011-12-30

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编辑： Walter Roberson 2020-3-27

采纳的回答： Chandra Kurniawan

hi,

can u tell me the procedure of reading multiple dicom images from a folder??

I have a folder named as 'Images', and dicom images are there, so i want to load these images in matlab.

I shall be thankful...

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http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

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Chandra Kurniawan 2011-12-30

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在 MATLAB Online 中打开

dicomlist = dir(fullfile(pwd,'Images','*.dcm'));
for cnt = 1 : numel(dicomlist)
    I{cnt} = dicomread(fullfile(pwd,'Images',dicomlist(cnt).name));  
end

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sir thank u so much...

what is pwd ?

dont we have to provide the folder path where dicom images are located??

Chandra Kurniawan 2011-12-30

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pwd is command to identify current folder..

So, you don't need to write complete path.

Usama Javed 2011-12-30

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Worked great.. thnx alot..

how can i read the images from that directory

Usama Javed 2011-12-30

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i got it sir,,,, thank u so much...

Usama Javed 2011-12-30

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can u tell how can i convert each image into row vector and than store all the row vectors in one matrix....

Usama Javed 2011-12-30

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i wrote this code but certain errors came...

for num = 1:numel(dicomlist)

J{num}=I{num}(1,end);

end

??? Index exceeds matrix dimensions.

Error in ==> loaddir at 10

J{num}=I{num}(1,end);

??? Index exceeds matrix dimensions.

Chandra Kurniawan 2011-12-30

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Did you try to vectorize that?

No, wrong way.

You can't use 'J{num}=I{num}(1,end); '

Chandra Kurniawan 2011-12-30

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I'll give you simple way to convert matrix into vector

A = magic(2);

B = zeros(1,4);

idk = 1;

for x = 1 : size(A,1)

for y = 1 : size(A,2)

B(idk) = A(x,y);

idk = idk + 1;

end

Chandra Kurniawan 2011-12-30

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Or maybe try this :

J{num} = I{num}(1:end);

Not

J{num}=I{num}(1,end);

Usama Javed 2011-12-30

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i have matrix of 512*512 so,

A=magic(512);

B=zeros(1,262144); %as 512*512=262144

is this correct

Chandra Kurniawan 2011-12-30

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perfect!

Usama Javed 2011-12-30

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gr8 sir,

J{num} = I{num}(1:end); it worked gr8

I am so thankful... :)

Usama Javed 2011-12-30

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can in retrieve that vectorize matrix to the original image??

Chandra Kurniawan 2011-12-30

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It depends.

If you know the original size (m x n), then you can convert it back to matrix.

Usama Javed 2011-12-30

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oh yes i think i get it,

if i segment the matrix on every 512 element to next row, than i think i can get back the original image.

images i am using are 512*512

naila 2013-7-26

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Salam! How do you retrieve original images. I have the same problem as you but for me I think the code above works fine. But I am confuse, If that works for all images in folder named "images". I want to get all 64 MR images from my folder images for further processing.

Please!

mohd akmal masud 2017-11-6

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编辑：Walter Roberson 2020-3-27

在 MATLAB Online 中打开

dicomlist = dir(fullfile(pwd,'Images','*.dcm'));
for cnt = 1 : numel(dicomlist)
    I{cnt} = dicomread(fullfile(pwd,'Images',dicomlist(cnt).name));
end

Hi Chandra, i done write this command in new script.m

What is the Command to write in command window?

Bhavna Pancholi 2018-6-19

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编辑：Walter Roberson 2020-3-27

在 MATLAB Online 中打开

hello,

dicomlist = dir(fullfile(pwd,'Images','*.dcm'));
for cnt = 1 : numel(dicomlist)
    I{cnt} = dicomread(fullfile(pwd,'Images',dicomlist(cnt).name));
end

In this program, if i want to read 10 images from a folder, which type of changes are needed?

what is the significance of "pwd" ?