Patient dose in brain perfusion imaging using an 80-slice CT system.

Area of Science:

• Radiology
• Medical Imaging
• Radiation Dosimetry

Background:

• Brain CT Perfusion (CTP) assesses brain tissue perfusion.
• CTP is utilized in various clinical scenarios.
• Comprehensive brain CT protocols (CPP) include multiple scans.

Purpose of the Study:

• To evaluate patient radiation dose.
• Focus on a comprehensive brain CT protocol (CPP).
• CPP includes unenhanced CT, CT angiography, and CTP.

Main Methods:

• Eighteen patients were scanned on an 80-slice CT system.
• Iterative reconstruction algorithm was employed.
• Radiation dose metrics (CTDIvol, DLP, ED) were recorded and calculated.

Main Results:

• CTP examinations showed mean CTDIvol of 119.5mGy and mean DLP of 478mGy·cm.
• The comprehensive brain CT protocol (CPP) resulted in a mean effective dose (ED) of 4.37mSv.
• Individual ED values ranged from 3.31 to 5.07mSv.

Conclusions:

• The radiation doses measured are lower than those reported in similar studies.
• This suggests efficient radiation dose management with the evaluated protocol.
• Findings are notable, even when compared to studies using higher-slice CT systems.