During a Radionuclide cystography procedure, what is the primary imaging method used?

The primary imaging method used during a radionuclide cystography procedure is nuclear scan. This technique involves the use of a radioactive tracer that is administered into the bladder, allowing for the visualization and assessment of bladder function, filling, and potential issues such as vesicoureteral reflux. The nuclear scan detects the emitted radiation from the tracer, providing images that reflect the physiological processes occurring in the bladder.

In radionuclide cystography, the emphasis is on functional imaging rather than structural imaging, which differentiates it from other modalities like CT or X-ray imaging, which focus more on the anatomical details rather than the physiological function of the bladder. Consequently, while these other imaging methods may provide complementary information, they do not serve as the primary technique specifically designed to evaluate bladder dynamics in this context. Ultrasound imaging is also less commonly used for this particular diagnostic purpose in comparison to nuclear scans.