Dose will be distorted when creating isodose surfaces

Support
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1

Dear All,

I am using SlicerRT plug-in, and I would like to create isodose surfaces. However, just after clicking “Create isodose surfaces”, I found that the dose was distorted automatically.

The two screenshots below are self-explanatory. The first screenshot is before clicking “Create isodose surfaces”, and the second one is after clicking. The three views are from the same slices. You can see that the dose is enlarged.

Before:

Isodose_before
Isodose_before1486×1124 63.5 KB

After:

Isodose_after
Isodose_after1486×1124 106 KB

Could you give me some support that how to avoid the distortion? Thank you so much!

2

It could simply be that the window/level settings have changed. Can you go to the Volumes module before and after Isodose generation and check the W/L values?

1 Like
3

It looks like that the issue. Dose color table changes palette according to the isodose levels, and window level for a display dose is set to auto.

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4

Thanks Csaba! That’s exactly the reason why the dose was magnified. The W/L values were 25/18 before, and 28/14 after.