dicomread for grayscale images

I am trying to get grayscale values for a jawbone dicom image, however, the values obtained for pixels do not seem to make sense. It says that data type is uint16. When i try to visually check the value correctness, a relatively gray area gives me a value of only 1000. I am expecting a value much larger as it is uint16 ranging from 0 to 65535.

Can somebody please take a look at my dicom file?

Thanks a lot!

Alan

[alan shen]

Supplement: I just tested the layer 1 (IMG0001.dcm) individually, the value appears to be -1000 for the black color. I have no idea why....

Answer 1

[Anshika Chaurasia]

Hi Alan,

First thing, int16 and uint16 datatypes are different.

• int16 - 16-bit signed integer, [-32768, 32767]
• uint16 - 16-bit unsigned integer, [0, 65535]

The image attached by you shows that datatype is int16 not uint16.

Refer to the following documentations on int16 and uint16 for more information.

Hpoe it helps you!