Write DICOM Image as .jpg

[Jörg]

Hi Chris,

I want to write an image of a DICOM file as .jpg with the following
example code:

require 'dicom'
include DICOM
require 'RMagick'
include Magick

obj = DICOM::DObject.new("myFile.dcm")
image = obj.image
image.write("dicom.jpg")

The written image result is completely black what should not be the
case.

Thx in advance for any help!

[Chris]

Hi Jorg,

This is (probably) because the extracted image contains the entire gray scale extracted from the CT scan or whatever the source, and you cant see any details. In this case you need to level your image according to the kind of organs you want high contrast for.

Try using the :level option:

image = obj.image(:level => true)

Or even specifying an exact range of hounsfield units for the leveling:

image = obj.image(:level => [-200,1000])

Best regards,

Chris

[Jörg]

Hi Chris,

with leveling as mentioned above and your hint to normalize before
writing the image it works out:

#image = obj.image(:level=>true)
image = obj.image(:level=>[100, 500])
image.normalize.write("test.jpg")

Thanks,
Jörg