Feb
5
Written by:
norman
Friday, February 05, 2010
A defect has been discovered in ClearCanvas Workstation 1.5 and 1.5 SP1 that has resulted in a product recall. Though the risk of harm to patients is low, we have decided to suspend access to the downloads so that new users will not be affected. Please read Product Bulletin 002 to understand the problem and take the appropriate actions. We apologize for any inconvenience this issue may cause.
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2 comment(s) so far...
Re: Product Bulletin 002 Issued
Product Bulletin 002 says "The defect is limited to images where the pixels are not square in shape. That is, this problem will manifest only when the DICOM header of the image specifies Pixel Aspect Ratio, and the computed ratio is anything other than 1."
If the image has Pixel Spacing or Imager Pixel Spacing (and hence NOT Pixel Aspect Ratio): is there a problem with non-square pixels? Or is everything OK?
By smr99 on
Friday, February 05, 2010
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Re: Product Bulletin 002 Issued
If Pixel Aspect Ratio is not present at all, then even though the pixels may not be square, the problem does NOT present. The code error involves a casting problem on the ratio computed from the Pixel Aspect Ratio tag where the floating point part of the value is discarded. If Pixel Aspect Ratio doesn't exist in the header, then Pixel Spacing or Imager Pixel Spacing is used instead.
This is my understanding, but I will re-confirm this with the dev team.
[The above has been verified with the Dev team to be accurate. 8-Feb-10]
By clinton on
Monday, February 08, 2010
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