How can I properly create histogram of DICOM image?

Dear all,

I have DICOM image and I would like to create histogram of it. But I created only this:

grayImage = dicomread('000054.dcm');
figure()
imhist(grayImage);
[X,map] = imread('trees.tif');
grid on;
title('Histogram testovacího obrazu');
caption = sprintf('Histogram testovacího obrazu %s');
title(caption, 'FontSize',fontSize, 'Interpreter', 'None');
ylabel('Četnost');

I attach this DICOM image. But I would like to better displayed this histogram (different range of x axe).

Can you advice me? Thank you for your answers.

[Walter Roberson]

What is the intention of the line

[X,map] = imread('trees.tif');

?

Answer 1

[Walter Roberson]

xlim([0 4095])