Which body habitus would result in the largest object-to-image distance (OID) during an abdomen radiograph?

Which body habitus would result in the largest object-to-image distance (OID) during an abdomen radiograph?

• A. Hyposthenic body habitus
• B. Hypersthenic body habitus
• C. Asthenic body habitus
• D. Sthenic body habitus

Answer: (B)

Object-to-image distance grows as the front-to-back thickness of the body increases. In an abdomen radiograph, the anatomy sits farther from the image receptor when the patient is thicker in the AP direction, so the OID becomes larger. Hypersthenic body habitus is a broad, deep, and bulky physique, giving the greatest anterior-posterior thickness, which places the abdominal organs farther from the detector. That’s why it yields the largest OID. The other habituses are progressively thinner in the AP dimension, so their OIDs are smaller.

Object-to-image distance grows as the front-to-back thickness of the body increases. In an abdomen radiograph, the anatomy sits farther from the image receptor when the patient is thicker in the AP direction, so the OID becomes larger. Hypersthenic body habitus is a broad, deep, and bulky physique, giving the greatest anterior-posterior thickness, which places the abdominal organs farther from the detector. That’s why it yields the largest OID. The other habituses are progressively thinner in the AP dimension, so their OIDs are smaller.