Radiation dose reduction from low-kilovoltage liver computed tomography using multidetector row computed tomography

Area of Science:

• Radiology
• Medical Imaging
• Radiation Oncology

Background:

• Liver cancer diagnosis and follow-up often require repeated computed tomography (CT) scans.
• Radiation dose is a significant concern in patients undergoing frequent medical imaging.
• Multidetector row CT (MDCT) is a standard tool for liver imaging.

Purpose of the Study:

• To evaluate the reduction in radiation dose during low-kilovoltage liver CT examinations.
• To assess the efficacy of lower kilovoltage settings in multidetector row CT (MDCT) for liver cancer patients.

Main Methods:

• Fifty liver cancer patients underwent 16-slice MDCT scans.
• Radiation dose was measured using the volume CT dose index (CTDIvol).
• Scans were performed at varying parameters including 120 kVp-140 mAs, 120 kVp-120 mAs, and 80 kVp-280 mAs.

Main Results:

• The CTDIvol was reduced by approximately 47% when using the 80 kVp-280 mAs setting.
• Lower kilovoltage settings were associated with a substantial decrease in radiation dose.
• No adverse effects related to the low-kilovoltage scans were mentioned.

Conclusions:

• Low-kilovoltage liver CT examinations using MDCT are effective in reducing patient radiation dose.
• The 80 kVp-280 mAs protocol shows significant potential for dose reduction in liver CT.
• This technique offers a safer imaging option for liver cancer follow-up.