PET scan is generally normal in Creutzfeldt-Jakob disease and may be helpful in ruling out other diseases.  
On PET scan, abnormalities in thalamic regions may be present.
What are the observations captured by medical imaging for Creutzfeldt-Jakob disease?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What are the observations captured by medical imaging for Creutzfeldt-Jakob disease? [/INST] \n PET scan is generally normal in Creutzfeldt-Jakob disease and may be helpful in ruling out other diseases.  
On PET scan, abnormalities in thalamic regions may be present.</s>