All gamma cameras have the same basic components. The camera may have one, two, or three heads, with the capability of imaging in multiple configurations. The camera is networked with a multitasking computer capable of acquiring and processing the data.

Several methods of imaging are used: dynamic, static, whole-body, and single-photon emission computed tomography (SPECT). These imaging capabilities are available on all camera systems.

Dynamic imaging allows serial display of multiple frames of data, each frame lasting 1–3 seconds, to visualize the blood flow associated with a particular organ. Static imaging is also known as planar imaging. The camera acquires one image at a time, covering the field of view. This image is two dimensional. Whole-body imaging acquires both anterior and posterior sweeps of the patient’s body. This type of imaging also gives two-dimensional information.

SPECT imaging has revolutionized the field of nuclear medicine. SPECT imaging provides three dimensions of data. SPECT imaging increased the specificity and sensitivity of nuclear imaging through improved resolution and is often combined with CT scans. A combined gamma camera and CT scanner allows both procedures to be performed without patient transfer. Therefore, positioning is not compromised, and both abnormal and normal areas are visualized without position change.