25643
To evaluate the metabolic activity of these lesions , 18F - fluorodeoxiglucose positron emission tomography - CT ( FDG - PET / CT ) scan was requested .
 Chemical: 18F - fluorodeoxiglucose; Chemical: FDG
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 18F - fluorodeoxiglucose; Chemical: FDG