The system uniformity was measured accordin g to the methods of measurements scintillation cameras of intrinsic flood field uniformity ( NEMA standards publ ication No.

• 结果:同一型号准直器的系统空间分辨率与灵敏度两项指标基本接近,而均匀性指标存在较大差异(当部分准直器存在质量问题时)。