Final answer:
Gated SPECT uses frames to capture images of radioactive tracers in the body. The number of frames can vary depending on the imaging protocol and clinical requirements. Limiting the number of frames helps reduce imaging time and radiation exposure.
Step-by-step explanation:
Single-photon-emission computed tomography (SPECT) uses frames to capture images of radioactive tracers in the body. The number of frames for gated SPECT can vary depending on the specific imaging protocol and the clinical requirements of the patient. Generally, gated SPECT involves acquiring multiple frames over a cardiac cycle to assess the function of the heart.
The number of frames for gated SPECT is typically limited to reduce the overall imaging time. Each frame requires a certain amount of time to acquire and process the data, and increasing the number of frames would prolong the procedure. Additionally, the radiation exposure to the patient should be minimized, and limiting the number of frames helps achieve this goal as well.