Scintillation crystal modules and methods of making the same

Details Scintillation crystal modules and methods of making the same Scintillation crystal modules and methods of making the same

1997-06-20

1999-02-23

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

G01T 1161

Patent

active

058747389

ABSTRACT:
A scintillation crystal module having an epoxy seal which has a coefficient of thermal expansion which is substantially the same as the backcap of the gamma camera. Among the suitable epoxy systems, the CTE of the epoxy could be modified somewhat by choosing a different catalyst or by adjusting the resin:catalyst ratio. The presently preferred epoxy system is a STYCAST.RTM. 2850 FT system available from W. R. Grace & Co. Using "catalyst 9" or "catalyst 11" from that system, a CTE of approximately 17.33.times.10.sup.-6 to approximately 19.4.times.10.sup.-6 in/in.degree. F. can be easily achieved. It has been discovered through analysis using FEA that an epoxy with a CTE in the range of 9.0 to 20.0.times.10.sup.-6 in/in.degree. F. provides satisfactory results in preventing seal separation during .+-.40.degree. F. temperature cycles. A method of making a scintillation crystal module includes the preparation of an epoxy seal having a coefficient of thermal expansion which is substantially the same as the backcap of the module, and assembling the seal, backcap, glass, and crystal in a conventional manner.

REFERENCES:
patent: 4004151 (1977-01-01), Novak
patent: 5148029 (1992-09-01), Persyk et al.
patent: 5521385 (1996-05-01), Pandelisev

Affiliated with

Also associated with

Rating

Scintillation crystal modules and methods of making the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scintillation crystal modules and methods of making the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scintillation crystal modules and methods of making the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-309638