Claims
- 1. A gamma camera quality test pattern comprising a substrate which is substantially transparent to gamma radiation, said substrate having four quadrants, each quadrant containing a set of spaced L-shaped grooves filled with a material that is essentially opaque to gamma radiation.
- 2. A gamma camera quality test pattern as recited in claim 1 wherein said substrate is made of plastic.
- 3. A gamma camera test pattern as recited in claim 2 wherein said plastic substrate is comprised of a polycarbonate resin.
- 4. A gamma camera test pattern as recited in claim 1 wherein said gamma opaque material is a heavy metal.
- 5. A gamma camera test pattern as recited in claim 4 wherein said heavy metal is lead.
- 6. A gamma camera test pattern as recited in claim 4 wherein said heavy metal is a fusible alloy.
- 7. A gamma camera test pattern as recited in claim 6 wherein said fusible alloy is a eutectic alloy.
- 8. A gamma camera test pattern as recited in claim 7 wherein said eutectic alloy is selected from the group consisting of Newton's metal, Rose's alloy, Darcet's alloy, Wood's alloy, Wood's metal, and Lipowitz's alloy.
- 9. A gamma camera test pattern as recited in claim 1 wherein each quadrant contains a plurality of sets of spaced L-shaped grooves filled with a material that is essentially opaque to gamma radiation.
- 10. A gamma camera test pattern as recited in claim 9 wherein all grooves within a particular set of grooves have the same width.
- 11. A gamma camera test pattern as recited in claim 10 wherein each set of grooves contains grooves of a width which is different than the width of grooves in any other set.
Parent Case Info
Applicant hereby claims the benefit under 35 U.S.C. .sctn. 119(e) of U.S. Provisional Application Ser. No. 60/033,997, filed Jan. 3, 1997.
US Referenced Citations (13)