ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

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Which performance check evaluates an ultrasound machine's ability to visualize weaker signals appropriately?

Accuracy
Reliability
Sensitivity
Specificity

The correct answer is: Sensitivity

Sensitivity is the performance check that evaluates an ultrasound machine's ability to visualize weaker signals appropriately. Accuracy refers to the machine's ability to measure the correct output, not necessarily for weaker signals. Reliability refers to consistency, not specifically in regards to weaker signals. Specificity is the machine's ability to distinguish between true and false signals, but does not specifically address weaker signals. Therefore, sensitivity is the most relevant performance check for evaluating an ultrasound machine's ability to visualize weaker signals appropriately.