Basics of cardiac MDCT: techniques and contrast application

Area of Science:

• Cardiovascular Imaging
• Medical Imaging Technology
• Radiology

Background:

• Advancements in multidetector CT (MDCT) technology have significantly improved cardiac imaging capabilities.
• Understanding the principles of ECG-gated CT algorithms is essential for cardiac assessments.

Purpose of the Study:

• To review fundamental cardiac MDCT techniques, including the latest 64-slice scanner generation.
• To discuss technical developments and ECG-gated algorithms in cardiac MDCT.

Main Methods:

• Review of basic cardiac MDCT techniques and recent technological advancements.
• Discussion of ECG-gated data acquisition principles for calcium scoring and coronary artery volumetric assessment.
• Emphasis on image quality optimization, scan protocols, and artifact management.

Main Results:

• Retrospective ECG-gated acquisition is vital for accurate calcium scoring and coronary artery tree assessment.
• Optimizing image quality, protocols, and artifact knowledge are mandatory for stable, high-quality cardiac MDCT.
• Newer 64-slice MDCT requires adapted protocols, offering improved spatial/temporal resolution for coronary CT angiography.

Conclusions:

• Cardiac MDCT, particularly with 64-slice scanners and ECG gating, provides reliable coronary artery assessment.
• Careful protocol adaptation and attention to image quality are necessary for accurate results.
• Dose-reducing techniques are strongly recommended for patient safety.