DICOM图像标注实际位置

Question

我们的图像是256 x 256，但显示区域大小比那个大，说512 x 512.

当我们进行注释时，注释（文本/行）应该在256 x 256区域内还是可以放在256 x 256图像区域之外？

如果我们将注释放在256 x 256区域之外，那么只有256 x 256显示区域的其他观看者如何显示带有这些注释的图像？

或者这些注释不适合下一个观看者显示，它们仅适用于GSPS和SR？

Answer 1

I think the answer may be found in:

ftp://medical.nema.org/medical/dicom/final/sup120_ft.pdf

tag 0070,0282 "Compound Graphic Units" is an enumerated value that is either "PIXEL" or "DISPLAY"

If it is "PIXEL", it seems your coordinates must be within the range 0\0 to Columns\Rows. (Quoted from the tag description).

If it is "DISPLAY", then the values must be within the range 0.0 to 1.0, and they are fractions of the "Displayed Area"

Displayed Area is a separate IOD you can find around page 1200 in

http://medical.nema.org/Dicom/2011/11_03pu.pdf

I think you can define the Displayed Area to be whatever you want and you can specify if you want the underlying image to scale or magnify etc according to the "Presentation Size Mode" tag.

I imagine you will find some viewers support this better than others...