Question

All of the following positions are likely to be employed for both single- and double contrast exam of the large bowel except ?

A. Lateral recumbent
B. AP axial rectosigmoid
C. Right and left lateral decubitus abdomen
D. RAO and LAO abdomen

Answer 1

The AP axial rectosigmoid position is not typically used for both single- and double-contrast exams of the large bowel, as it specifically targets the rectosigmoid area. The other positions listed are common for both types of exams and are chosen based on the specific imaging needs.

Step-by-step explanation:

Positions Employed for Large Bowel Exams

In the context of imaging for large bowel examinations such as single- or double-contrast studies, various positions can be utilized to provide optimal visualization of the colon. These positions include:

• Lateral recumbent: The patient lies on their side. This position is common for both types of examinations.
• Right and left lateral decubitus abdomen: The patient lies on their right or left side, which is useful for viewing the bowel when it is filled with contrast material or air.
• RAO and LAO abdomen: These oblique positions allow for better distinction of certain areas of the bowel by providing an angled view.

The position not typically used for both single- and double-contrast exams of the large bowel is AP axial rectosigmoid. This position focuses on the rectosigmoid area and may not always be used in both types of exams. The selection of the most appropriate position depends on what part of the large bowel needs to be examined and the details required by the radiologist.