[vtkusers] Know the value of skin while reading DICOM files

[Nizam]

Thank you so much...


Bill Lorensen-2 wrote:
> 
> -800 HU is probably a good guess with CT. ITK's dicom reader applies
> the dicom slope/intercept fileds to the data and the result is
> Hounsfiled Units: http://en.wikipedia.org/wiki/Hounsfield_scale
> 
> Typically, the slope is 1 and the intercept is -1024. If a reader does
> not apply the slope/intercept, then -800 HU will typically be -800 +
> 1024 = 224. An intensity of 500 would be 1024 - 500 = -524 HU.
> 
> On Wed, Jun 16, 2010 at 11:22 PM, Nizam <nizam.abreu at gmail.com> wrote:
>>
>> Dear all,
>>
>>   I think my question is really stupid. Anyway, why all the codes that I
>> read about showing the skin uses the value 500 for contour filter and in
>> my
>> dicom file it works only when I am using -800. Do I need to convert to
>> unsigned char? How do I know the correct value if am I always using
>> dicoms
>> of the head?
>>
>> Thanks in advance,
>> Nizam
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