An increase in object-to-image distance (OID) will result in which change to image sharpness?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the Clover Learning Radiography exam. Master image evaluation and quality control with questions and detailed explanations. Enhance your skills and be exam ready!

Multiple Choice

An increase in object-to-image distance (OID) will result in which change to image sharpness?

Explanation:
Geometric unsharpness increases as the object moves farther from the image receptor. When OID is larger, the X-ray beams diverge more before reaching the detector, so the blur from the finite focal spot is projected over a greater distance and appears larger on the image. This enlarges the blur circle at the detector, making edges less defined and sharp. The blur size is proportional to the focal spot size and the ratio of OID to source-to-object distance, so increasing OID directly increases unsharpness and decreases sharpness.

Geometric unsharpness increases as the object moves farther from the image receptor. When OID is larger, the X-ray beams diverge more before reaching the detector, so the blur from the finite focal spot is projected over a greater distance and appears larger on the image. This enlarges the blur circle at the detector, making edges less defined and sharp. The blur size is proportional to the focal spot size and the ratio of OID to source-to-object distance, so increasing OID directly increases unsharpness and decreases sharpness.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy