"do not write PET/CT, PETCT, PET CT, CT/PET, etc."
Expected headings
"Location"
"Structure"
"Plain radiograph"
"Mammography"
"Fluoroscopy"
"Ultrasound"
"CT"
"MRI"
"Signal characteristics"
"Angiography (DSA)"
"Nuclear medicine"
"PET-CT"
"PET-MRI"
"Examples"
"Combinations of modalities are addressed under the first modality, which often reflects the main focus, while the second is used for reference (e.g. PET-CT, US-CT)."