Which surface of the hand should be in contact with the IR for the lateral projection of the fifth digit (pinky)?

For the lateral projection of the fifth digit (pinky), the proper positioning requires the medial surface of the hand to be in contact with the image receptor (IR). In this projection, the hand is turned such that the pinky is positioned laterally, allowing the medial side to face the IR. This positioning places the digit in a profile view, which is crucial for accurately visualizing the anatomy of the pinky and any potential pathologies.

Using the medial surface in contact with the IR correctly aligns the fifth digit for optimal imaging. This positioning minimizes distortion and ensures that the phalangeal structures are clearly depicted. It’s important in radiographic imaging to adhere to these specific placements to obtain the most diagnostic images, which aids in further clinical evaluations.

Other surfaces, such as the lateral, dorsal, or palmar, would not provide the necessary orientation for a lateral view of the pinky. Instead, they would either misrepresent the digit or obscure important anatomical details, making the medial surface the optimal choice for this view.