PA Wrist Projection Obtained in Radial Deviation Demonstrates

question 45

Multiple Choice

PA wrist projection obtained in radial deviation demonstrates
1) the lunate positioned distal to the ulna.
2) a foreshortened scaphoid.
3) closed CM joints.
4) an elongated scaphoid.

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

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Definitions:

Angularity

A geometric dimensioning and tolerancing (GD&T) term that describes the angle tolerance of a feature relative to a datum.

Specified Angle

An angle that is expressly defined or given, often noted in technical drawings or design specifications for construction or manufacturing.

Parallelism

The relationship between two lines or surfaces that are equidistant from each other at all points.

Perpendicularity

A geometric tolerance that specifies the angle between two specified surfaces or features, requiring them to be exactly 90 degrees to each other.