: The most common finding is the visualization of the barium-impregnated thread.

When a sponge is retained, it often presents with specific features on an X-ray or CT scan:

: Over time, the sponge may appear as a "whirled" or reticular pattern due to the physical structure of the gauze fibers.

: On an X-ray, this marker appears as a distinct, high-density linear or "ribbon-like" shadow.

The presence of a sponge on a post-operative X-ray is considered a "never event" in healthcare—a serious, preventable medical error.

: If the count is "off," a mobile X-ray (C-arm) is brought into the operating room to scan the surgical site before the patient is closed.

: These markers allow radiologists to quickly identify the presence and exact location of a sponge within a patient’s body cavity if the manual sponge count is incorrect. Radiographic Appearance