Yep: the Oxford Diffraction 'CrysAlisPro' package includes a tool
working 

in precisely the same way: generating 'pseudo-precession photos' through


pixel-by-pixel analysis of all of the raw diffraction images... 

 

 

Marcus Winter (Oxford Diffraction)

 

 

 

-----Original Message-----
From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of
Martin Hallberg
Sent: 25 June 2009 19:00
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] From oscillation photographs to seeing specific
sections of reciprocal lattice.

 

Hi,

 

On Jun 25, 2009, at 6:41 PM, Ian Tickle wrote:

 

> But I thought what you wanted was to reconstruct the diffraction  

> pattern

> (i.e. streaks, TDS, ice rings, zingers, warts & all) as a

> pseudo-precession image, not just display a representation of the

> integrated intensities.  That surely would be much more useful, then  

> one

> could see whether the apparent systematic absence violations were just

> streaks from adjacent spots, TDS, ice spots etc that have fooled the

> integration algorithm.  That would be much more useful!

 

This is actually how it is done in the Bruker software (Proteum2). It  

collects the relevant pixels from a whole series of xray images and  

generates a simulated precession image for a chosen zone. It can be  

very informative.

 

Cheers,

 

Martin

 

 

On Jun 25, 2009, at 6:24 PM, Francis E Reyes wrote:

 

> Hi all

> 

> Is there software that will take oscillation photographs and  

> construct a precession-like photo of specific layers of the  

> reciprocal lattice (say h0l), for inspection of the systematic  

> absences, etc?

> 

> Thanks

> 

> FR

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