Truncate my image intensity values in the range [-100 400]

Hello,

I have a medical raw CT 'NIFTI' image file of type double where the values of the image are in the range from -2000 to 2004. The values are the Hounsfield units (HU). The image looks like below.

Now as mentioned in a paper "No special pre-processing was performed except that we truncated the image intensity values of all scans to the range of [-200; 200] HU to ignore irrelevant image details". When i load this image file in an online NIFTI file viewer i could adjust the values and the same image looks like below.

But in matlab i want to truncate my image values between -100 and 400 to get a image as dislpayed above. How can i do that?

Answer 1

[Walter Roberson]

TruncatedImage = max( min(YourImage, 400), -100 );

[Emerson Nithiyaraj]

thankyou for you kind reply..But it gives me an output like this

[Walter Roberson]

How are you viewing it? Are you using imagesc()? Are you using imshow() with a second parameter of [] ?

[Emerson Nithiyaraj]

with the parameter [] inside imshow