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Technical Discussions
john williams
john williams
05:52 May-23-2000
diagnostic film length

IS it true when calculating a minimum sfd, a rough rule of thumb is 1.1 * film length for gamma and for x-ray it is 1.5 * filmlength. This rule follows for gamma if you calculate it mathematically but not for x-ray. Could you enlighten me please


 
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Chris Gabriel
NDT Inspector
United Kingdom, Joined Apr 2000, 1

Chris Gabriel

NDT Inspector
United Kingdom,
Joined Apr 2000
1
03:26 May-24-2000
Re: diagnostic film length
That would be a very rough rule if you applied it.

Think about the effect of specimen thickness !

The thicker the specimen gets the less area you are
going to cover on each exposure.




 
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