Overview
A gamma camera detects gamma rays emitted by radiopharmaceuticals to form functional images. It supports planar imaging and single photon emission computed tomography. Collimators shape the detected photon distribution for resolution and sensitivity tradeoffs.
Collimators
Collimator selection affects spatial resolution and sensitivity for specific studies. Low energy high resolution and high sensitivity collimators are chosen based on tracer and clinical need. Collimator integrity is checked during QC.
Energy Window and Calibration
Energy window settings optimize detection of specific photon energies. Daily calibration and uniformity checks ensure consistent performance. Quality control prevents artifacts and quantification errors.
Hybrid and SPECT CT
Many gamma cameras are combined with CT for anatomical correlation. SPECT CT improves localization and attenuation correction. Integration enhances diagnostic confidence and reporting.