CAT scanning and terra cotta

Barbara Appelbaum <aandh [at] mindspring__com> writes

>I have a problem concerning the examination of an archaeological
>terra cotta.  I am looking into the possibility of having it
>CAT-scanned, but don't know whether normal X-rays (if that is what
>is used) would penetrate up to about 12 inches of terra cotta.  I
>would appreciate hearing from someone with experience that would
>shed light on this.

"CT Scans in Art Work Appraisal" by Dr Marc Ghysels, Art Tribal No.
04 Winter 2003:116-131, has a section on Terracotta Sculpture
illustrated by numerous scans. The article gives a maximum object
dimension for scanning of 50cm, and also discusses the influence of
CT scanning on later thermoluminescence testing. Please contact me
off list if you have difficulty obtaining a copy.

Julia Gresson
Auckland Museum Tamaki Paenga Hira
Auckland
New Zealand


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                  Conservation DistList Instance 19:10
                Distributed: Wednesday, August 17, 2005
                       Message Id: cdl-19-10-006
                                  ***