Apologies if this is a duplicate, not clear if the Email I sent 5 hours ago
actually got sent.
Hi Alex,
Although there is an “ice” icon in the imosflm GUI, which excludes
all resolution bins where ice ringss are possible, this is not the best way to
deal with this. Instead, use the Settings -> Processing options -> Processing
tab, where you can specify individual resolution ranges to be excluded from the
integration.
The important thing here is to make sure that the resolution range you specify
is generous enough. Looking at an image and holding down the Ctrl key to give
you the resolution where the mouse pointer is positioned, you need to make sure
that you specify resolution limits that are a bit below (on the low resolution
side) and above (on the high resolution side) the ice ring itself. This is
because if any part of the measurement box extends into the ice ring it can
affect the integration, and the measurement box is larger than the actual spot
size.
This will, of course, affect your overall completeness, but it should get rid
of the reflections with anomalous intensity. I find that the easiest way to
check this is to look at the Wilson plot produced by ctruncate (one of the post
you get when you run QuickScale).
Best wishes,
Andrew
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