How Is the Patient Positioned for an AP Projection (Modified

question 17

Multiple Choice

How is the patient positioned for an AP projection (modified Cleaves method) of the pelvis to demonstrate the femoral neck without foreshortening?

• A) Abduct the femurs to a 45-degree angle with the IR.
• B) Abduct the femurs until they are placed as close to the imaging table as possible.
• C) Abduct the femurs to 20 to 30 degrees from vertical.
• D) This cannot be accomplished in this projection.

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Definitions:

Internal Validity

Internal validity refers to the extent to which a piece of research accurately measures or tests what it set out to measure or test, without being influenced by external factors. High internal validity means that the study design, conduct, and analysis ensure the study's findings are trustworthy.

External Validity

External validity refers to the extent to which the outcomes of a study can be generalized or applied beyond the specific study context or sample, including to other populations, settings, treatment variables, and measurement variables.

Systematic Errors

Biases or errors that consistently affect the results of a study in a specific direction, arising from the research design or methodology.

Inconsistent

Lacking in uniformity, stability, or agreement; often displaying variability.