A PA Chest Projection with Poor Positioning Demonstrates Vertical Clavicles

question 31

Multiple Choice

A PA chest projection with poor positioning demonstrates vertical clavicles and the manubrium at the same level as the fifth thoracic vertebra. How was the patient positioned for such an image to be obtained?

• A) The shoulders and elbows were not internally rotated.
• B) The shoulders were elevated.
• C) The patient's upper midcoronal plane was tilted toward the IR.
• D) The central ray was angled caudally.

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Definitions:

Chance Variation

Variations in observations or data that result from random effects or events that cannot be controlled or predicted.

Sample Mean

The average value of a sample set of numbers, calculated by adding all the values and dividing by the number of values.

Control Limits

The boundaries in a control chart beyond which points indicate a statistical process is out of control.

Standard Errors

Measures of the statistical accuracy of an estimate, indicating the variability of an estimate from sample to sample.