Imaging of Liver and Spleen Morphology

In most nuclear medicine departments throughout the world, gamma cameras have completely replaced rectilinear scanners. A large field of view gamma camera with a single or dual head, fitted with a low-energy, parallel hole, all-purpose collimator, is generally chosen for most planar studies using technetium-99m-labeled agents. The main advantage of the dual-head gamma camera is patient convenience, where the data collection time is reduced by one-half as it allows simultaneous anterior and posterior image acquisition. The reduction in imaging time often improves the spatial resolution because of less patient movement during data collection. A triple-head gamma camera, when available, is preferred for SPECT images. The gamma camera image acquisition parameters are identical for both the liver and spleen.