High pitch third generation dual-source CT: Coronary and cardiac visualization on routine chest CT

Area of Science:

• Radiology and Imaging Science
• Cardiovascular Imaging
• Medical Physics

Background:

• Chest CT scans are standard in radiology but lack detailed cardiac imaging.
• Advancements in CT technology are exploring enhanced visualization of non-cardiac structures.

Purpose of the Study:

• To assess the visualization of myocardial and coronary arteries using high-pitch, non-gated CT with 3rd generation dual-source technology.
• To compare image quality and radiation dose between high-pitch and conventional-pitch chest CT scans.

Main Methods:

• Evaluation of cardiac anatomy in patients who underwent 3rd generation, non-gated, high-pitch contrast-enhanced chest CT.
• Comparison with prior conventional (low-pitch) chest CT scans from chest abdomen pelvis exams.
• Image features of cardiac structures were scored by blinded reviewers, with paired analysis performed.

Main Results:

• High-pitch CT demonstrated superior visualization scores for all cardiovascular structures compared to conventional pitch scans.
• Coronary arteries were visualized in significantly more segments (9 vs. 2) with high-pitch CT.
• High-pitch CT resulted in lower radiation exposure with comparable image noise.

Conclusions:

• Non-gated 3rd generation chest CT frequently visualizes myocardial structure and coronary arteries.
• The findings suggest a potential role for routine cardiac interpretation on chest CTs obtained for non-cardiac indications.
• Further investigation is warranted to establish guidelines for cardiac assessment during routine chest CTs.