Intrinsic spatial resolution of a gamma camera is measured WITHOUT the collimator. Which factor most directly degrades intrinsic resolution?

Intrinsic spatial resolution of a gamma

Multiple choice — select the best answer

ASeptal penetration through the collimator
BIncomplete absorption in the crystal
CPhotomultiplier tube diameter
DStatistical spread of light photons in the crystal

✓ Correct answer: D. Statistical spread of light photons in the crystal Intrinsic resolution is limited primarily by the statistical spread of scintillation photons within the NaI crystal, which creates uncertainty in locating the interaction. PMT diameter and electronics also contribute, but the photon statistics in the crystal are the dominant factor for intrinsic resolution.

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Intrinsic spatial resolution of a gamma camera is measured WITHOUT the collimator. Which factor most directly degrades intrinsic resolution?

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