A Cephalic Central Ray Angulation Is Required on an AP

question 1

Multiple Choice

A cephalic central ray angulation is required on an AP knee projection when the
1) examination is performed with the patient in an upright position.
2) patient's anterior tibial margin is demonstrated distal to the posterior tibial margin on the resulting image.
3) the patient's ASIS to imaging table measurement is 22 cm.
4) the knee is flexed and a curved IR is used.

• A) 2 and 3 only
• B) 4 only
• C) 2 and 4 only
• D) 1, 2, and 4 only

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Definitions:

Central Nervous System

Comprised of the brain and spinal cord, it serves as the main control center for the body, processing information and directing bodily responses.

Action Potentials

Rapid electrical impulses that travel along the membrane of nerve cells or muscle fibers, initiating activity.

Node Of Ranvier

Gaps in the myelin sheath of nerve fibers where action potentials are generated in saltatory conduction.

Saltatory Conduction

The jumping of action potentials from node to node along a myelinated neuron, allowing for faster neural transmission.