Comparison of Calcium Scoring Between 64-Multidetector Computed Tomography and 320-Multidetector Computed Tomography...

Area of Science:

• Medical Imaging
• Radiology
• Cardiovascular Disease

Background:

• Coronary artery disease (CAD) is a leading cause of mortality worldwide.
• Early diagnosis and risk stratification are crucial for effective management.
• Computed tomography (CT) is a key imaging modality for coronary calcium scoring.

Purpose of the Study:

• To investigate the relationship between radiation dose and image noise.
• To compare coronary calcium scoring protocols on 64- and 320-multidetector CT (MDCT) systems.
• To determine the feasibility of lower-dose protocols for clinical use.

Main Methods:

• Utilized cardiac QRM phantoms (small and medium sizes).
• Evaluated various low-dose imaging protocols (120 kVp, 10-80 mAs) on 64-MDCT and 320-MDCT.
• Assessed radiation dose (mSv) and noise levels for each protocol.

Main Results:

• Achieved significantly lower radiation doses with optimized protocols on both CT systems.
• Small phantom: 0.336 mSv (64-MDCT) vs. 0.2 mSv (320-MDCT).
• Medium phantom: 2.73 mSv (64-MDCT) vs. 1.58 mSv (320-MDCT).
• Diagnostic accuracy was maintained despite dose reduction.

Conclusions:

• Lower-dose CT protocols are effective for coronary calcium scoring.
• Clinical application of these protocols can reduce patient radiation exposure.
• This approach supports early diagnosis of coronary artery disease without sacrificing accuracy.