Doctors take two approaches to diagnosing Alzheimer’s disease. First, they ask patients questions and fill out one of several standardized questionnaires to assess memory and other aspects of thinking. Second, doctors order various tests to rule out other conditions that can affect mental function. There is no direct test for Alzheimer’s disease, or for the risk of developing it. This article will clarify the value of PET, PET/CT, CT, and MRI in diagnosing Alzheimer’s disease.

Positron emission tomography (PET) is a diagnostic imaging technique that evaluates the function of tissues and organs. PET scans are useful in detecting or evaluating certain conditions such as: Cancer, heart disease, and brain disorders. Lung problems may also be detected by your doctor after a PET scan of your lungs.

The application of PET imaging has shown that the response of pancreatic ductal adenocarcinoma after neoadjuvant treatment has changed from morphological assessment to metabolic assessment, especially with the proposal of PET/MRI, playing an important role in predicting treatment outcomes and clinical decision making in these patients. However, due to lack of data, the results need to be further studied.