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Effects of a Reduction in Crystal Thickness on Anger-Camera Performance

Rhode Island Hospital and the Veterans Administration Hospital, Providence, Rhode Island

Correspondence: For reprints contact: Henry D. Royal, Div. of Nuclear Medicine, Beth Israel Hospital, 330 Brookline Ave., Boston, MA 02115.

ABSTRACT

The performances of two commercial gamma cameras,° with crystals 1.3 and 0.6 cm thick, are compared. Phantom studies simulating clinical conditions showed no significant difference in performance at 140 keV. At 68 keV, the thinner crystal gave marginal improvements in camera performance with phantoms simulating clinical conditions. Frequent use with very low-energy emitters, such as Tl-201, would be needed to justify the expense required to refit the 1.3 cm camera with a 0.6 cm crystal.

FOOTNOTES

^* Current address: Div. of Nuclear Medicine, Peter Bent Brigham Hospital, Boston, MA 02115.

^* Current address: Nuclear Medicine Service, Veterans Medical Center, Portland, OR 97207.