What are errors that Matlab gives you when you are using dicomread  function?

initially i used this X = dicomread('CT-MONO2-8-abdo.dcm');

matlab shows error as File "CT-MONO2-8-abdo.dcm" not found.

then i used this  [X, map, alpha, overlays] = dicomread(CT-MONO2-8-abdo.dcm, varargin)

error was ??? Undefined function or variable 'CT'.

The first one should work

X = dicomread('CT-MONO2-8-abdo.dcm');

Are you sure your code is executed in the same folder as the DCM file? Otherwise, you have to pass the entire absolute path ('C:\\folder\\CT-MONO2-8-abdo.dcm') for instance.

Check also if your file extension is indeed .dcm

thank you sir it works good ,actually i have stored the matlab code in different location

if anybody having OT-MONO2-8-colon.dcm image please help me. i have this image without dcm extension 

manually add the extension ".dcm" then make sure you are in the correct directory and execute it:

img = dicomread('filename'); imshow(img, [minAllowedPixValue maxAllowedPixValue]);%imshow(img,[0 255])