Which procedure is NOT typically performed with 99mTc-sulfur colloid?

The procedure that is not typically performed with 99mTc-sulfur colloid is the localization of Meckel's diverticulum. 99mTc-sulfur colloid is primarily used for imaging in studies that assess gastric emptying, gastrointestinal bleeding, and gastroesophageal reflux.

In the context of the other options, 99mTc-sulfur colloid is suitable for gastric emptying studies because it can provide accurate visualization of the stomach and its contents. Similarly, it is effectively used to locate areas of gastrointestinal bleeding, as the colloid will accumulate in areas of active bleeding due to the increased vascularity associated with ulcerations or lesions.

For gastroesophageal reflux studies, the radiotracer is used to visualize the reflux of stomach contents into the esophagus, allowing for assessment of the function of the lower esophageal sphincter.

On the other hand, when it comes to Meckel's diverticulum localization, a different radiotracer, such as 99mTc-pertechnetate, is usually employed. This is because 99mTc-pertechnetate is taken up by ectopic gastric mucosa that may be present in Meckel's diverticulum, making it the preferred agent for this