This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear medicine, Subject name: Radiology
PET Scan is useful in evaluating all the following except? 
Select and explain. 
A. Solitary pulmonary Nodule, B. Skeletal metastasis, C. Myocardial Viability, D. Dysphagia Lusoria
D: Dysphagia Lusoria
Answer: D: Dysphagia Lusoria 
Explanation: *PET is good for detection of functional/Metabolic activities and not good enough for anatomical detailing like to look for a aberrant Subclan aery. *MR Angio/CT Angio are used for detection of Dysphagia Lusoria (aberrant Subclan aery)