Radionuclide cystography using the direct method requires which procedure?

Radionuclide cystography using the direct method involves the administration of a radiopharmaceutical directly into the bladder to assess its function and structure. This process typically requires catheterization of the patient to accurately introduce the radiopharmaceutical into the bladder.

Catheterization ensures that the radiopharmaceutical is delivered directly into the bladder rather than relying on natural urinary flow. This direct approach allows for better control over the volume and timing of the radiopharmaceutical's introduction, leading to more reliable and interpretable diagnostic images.

Understanding the importance of this direct method is critical in nuclear medicine, as it enables clinicians to obtain clear imaging of the bladder's anatomy and any potential abnormalities present, such as reflux or obstructions.