A 24-year-old woman with Graves’ disease presents complainin…
A 24-year-old woman with Graves’ disease presents complaining of blurry and double vision during her afternoon commute driving home from work for the last several months. She also reports weakness with climbing stairs and brushing her hair. She has positive acetylcholine receptor antibodies in her blood. Pyridostigmine leads to improvement of her clinical symptoms. In discussing the patient’s clinical course, which of the following would be the next best diagnostic imaging modality?