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  Indian J Med Microbiol
 

Figure 2: Two types of the pinhole collimators that routinely used in pinhole single photon emission computed tomography imaging: (a) Knife-edge collimator and (b) channel-edge pinhole collimator

Figure 2: Two types of the pinhole collimators that routinely used in pinhole single photon emission computed tomography imaging: (a) Knife-edge collimator and (b) channel-edge pinhole collimator