When imaging the rib cage with a 99mTc-oxidronate, which structure is not typically demonstrated?

When imaging the rib cage with 99mTc-oxidronate, the acromion processes are not typically demonstrated. 99mTc-oxidronate is a radiopharmaceutical that accumulates in areas of increased bone turnover and is particularly useful for imaging bone structures associated with metabolic activity. The ribs, sternum, costochondral junctions, and clavicles represent areas that often show uptake due to their involvement in various physiological processes or pathologies such as fractures, infections, or tumors.

In contrast, the acromion processes, which are part of the shoulder girdle, may not exhibit the same level of radiopharmaceutical uptake when the focus is primarily on rib cage imaging. This can be due to a few factors, such as the anatomical location of the acromion relative to the rib cage, the different physiological conditions affecting these areas, or the imaging technique used that may not emphasize the shoulder area as much as the rib cage. Therefore, while rib-related structures are typically well-demonstrated during imaging, the acromion processes are less likely to be captured effectively in this context.