slope/intercept in dcmimgle/dcmimage

[markw]

Hello all,

I am working with MR modality images. Sometimes these images have tags rescale intercept/rescale slope. Reading comp.protocols.dicom the posts say that you should not use intercept/slope on MR modality images.

So does the class dcmimgle/dcmimage which uses intercept/slope before giving you the pixel data take this into account if modailty is MR? Or can MR still use (and should?) really use these tags too?

Thanks,
Mark

[Jörg Riesmeier]

The module dcmimgle always [1] uses the values of Rescale Slope/Intercept if these attributes are present in the dataset. If you don't want this you have the choice to disable the modality LUT transformation by setting the flag CIF_IgnoreModalityTransformation in the constructor of class DicomImage.

[1] Apart from XA and XRF images as required by the DICOM standard.