Where Should the Central Ray Be Directed for a PA

question 86

Multiple Choice

Where should the central ray be directed for a PA projection of the patella?

• A) Inch below the patella
• B) Midpopliteal area
• C) Base of the patella
• D) Apex of the patella

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Definitions:

Thrust Screw

A type of screw specifically designed to handle axial loads, effectively translating rotational motion to linear motion.

Differential Carrier

The housing that contains the differential gear mechanism, allowing for different wheel speeds when turning.

Crown Gear

A gear with teeth projecting at right angles to the wheel, allowing it to transmit power at an angle to the gear shaft.

Thrust Block

A concrete or other type of structure designed to absorb and distribute the thrust or force exerted by a pipe, particularly in bends or at junctions, to prevent movement.