[vtkusers] Scalar Type of vtkDICOMImageReader

[Scott Johnson]

In my files the Pixel Padding value is 63536.  As a signed short, that's
-2000.

Good catch.

Also, I wasn't expecting vtkDICOMImageReader to perform the HU
computation.  It overachieved.  That would be a good thing to put in the
documentation.

Thanks

		-- Scott

-----Original Message-----
From: John Drescher [mailto:drescherjm at gmail.com] 
Sent: Tuesday, April 13, 2010 2:27 PM
To: Scott Johnson
Cc: Jothybasu K Selvaraj; vtkusers at vtk.org
Subject: Re: [vtkusers] Scalar Type of vtkDICOMImageReader

On Tue, Apr 13, 2010 at 3:20 PM, John Drescher <drescherjm at gmail.com>
wrote:
> On Tue, Apr 13, 2010 at 3:18 PM, Scott Johnson
> <Scott.Johnson at neuwave.com> wrote:
>> Right now I just want the unsigned short CT numbers as the pixel
values.
>>
>>
>>
>> I'm seeing values as small as -3024.


Here is what I get for one LungCT case I just looked at:
0028|0120 Pixel Padding Value = -2000

This will make pixel values outside of the person -3024.

John

John

>>
>
> Take a look at the padding value in the dicom
>
> John
>



-- 
John M. Drescher