Scanner Quality Control to Detect Shift or Drift Is Accomplished

question 5

Multiple Choice

Scanner quality control to detect shift or drift is accomplished by imaging what object?

• A) Phantom
• B) Filter
• C) Grid
• D) Patient

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Definitions:

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to determine if they come from the same distribution.

Null Hypothesis

A default hypothesis that there is no significant difference or effect, often represented as H0 in statistical tests, to be tested against an alternative hypothesis.

Wilcoxon Test

A non-parametric statistical test used to compare two paired groups and determine whether their population mean ranks differ.

Expected Value

A measure in probability and statistics indicating the average outcome of a random event, calculated as the weighted average of all possible values.