Whole-brain Volume Perfusion Computed Tomography: Acquisition Techniques and Radiation Dose

摘要

Brain perfusion computed tomography (CT) is a routine clinical application in many hospitals. A significant limitation of perfusion CT is insufficient brain coverage because the CT detector width is limited. With narrow detector widths, the entire brain volume cannot be imaged in a single examination or with a single contrast bolus. CT vendors have developed various approaches to extend the scan range-from 2 cm to 4 cm or 8 cm to 16 cm-making whole-brain volume perfusion CT (VPCT) a more practical option. VPCT allows continuous scanning of the whole brain or of the majority of the brain. Different manufacturers use different VPCT techniques.