The gamma camera is the core detection system in planar and SPECT imaging. Its performance determines spatial resolution, sensitivity, and image quality.

This section explores collimators, scintillation crystals, photomultiplier tubes, energy discrimination, and signal processing. Understanding how photons are detected and converted into images is essential for interpreting artefacts and system limitations.

FRCR, RANZCR and ABR Core exams frequently test collimator design, septal penetration, intrinsic versus extrinsic resolution, and detector efficiency.

The questions below assess your understanding of detector physics, system components, and performance trade-offs in clinical nuclear medicine imaging.

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