Final answer:
The appropriate initial test for a patient with suspected anxiety disorder is the thyroid-stimulating hormone (TSH) test, while magnetic resonance imaging of the brain is not relevant for this purpose.
Explanation:
The appropriate initial test for a patient with suspected anxiety disorder would be thyroid-stimulating hormone (TSH) test. Anxiety disorders can be caused or exacerbated by physical health conditions such as thyroid imbalances, making TSH testing a relevant and necessary step.
Magnetic resonance imaging of the brain would not be an appropriate initial test for suspected anxiety disorder as it is primarily used to detect structural abnormalities in the brain rather than physiological conditions like thyroid issues.
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