Question

Which of the following should NOT be part of a CT brain perfusion exam?

1) the patients head should rest freely and should be unrestrained
2) IV contrast is administered
3) multiple scans need to be performed every 1-2 seconds for a period of about a minute
4) low dose protocols are used

Answer 1

For a CT brain perfusion exam, the patient's head must be positioned and stabilized, not rested freely, for the procedure to be conducted correctly and to avoid poor quality images.

Step-by-step explanation:

The CT brain perfusion exam involves scanning techniques using radiation to measure the blood flow in the brain's tissues. Considering the choices provided, the element that should NOT be part of a CT brain perfusion exam is that the patient's head should rest freely and should be unrestrained. This is inaccurate because for a CT scan, the patient's head needs to be positioned and stabilized to prevent motion that can result in poor quality images and potential re-scans. IV contrast administration, conducting multiple scans every 1-2 seconds for about a minute, and using low dose protocols are all correct aspects of a standard CT perfusion exam.