Columbia subject headings:
Brain--Blood-vessels--Radiography.
Cerebral ischemia--Diagnosis.
Regional blood flow--Measurement.
Tomography, Emission.
Vertebral artery--Surgery.
Harvard subject headings:
Brain--Blood-vessels--Tomography.
Cerebral ischemia--Diagnosis.
Regional blood flow--Measurement.
Tomography, Emission.
Vertebral artery--Surgery.
Princeton subject headings:
Brain--Blood-vessels--Radiography.
Cerebral ischemia--Diagnosis.
Regional blood flow--Measurement.
Tomography, Emission.
Vertebral artery--Surgery.