[Low-dose chest pain protocol for cardiac and chest imaging using dual-source computed tomography]

Area of Science:

• Radiology
• Cardiovascular Imaging
• Medical Imaging

Background:

• Dual-source computed tomography (CT) is utilized for cardiac and thoracic vascular imaging.
• Evaluating the clinical utility of reduced radiation protocols is crucial for patient safety.

Purpose of the Study:

• To assess the clinical value of a low-dose chest pain protocol for cardiac and chest vascular imaging.
• To compare image quality and effective radiation dose between regular and low-dose protocols.

Main Methods:

• 102 patients underwent dual-source CT angiography using a chest pain protocol.
• Patients were stratified by heart rate (≤75 bpm and 76-120 bpm) into regular and low-dose groups.
• Image quality of pulmonary artery, coronary artery, and aorta was evaluated; effective radiation doses were calculated.

Main Results:

• All radiation doses yielded satisfactory images.
• No significant difference in image quality was observed between regular and low-dose groups within each heart rate stratum (P > 0.05).
• Low-dose protocols significantly reduced effective radiation doses compared to regular-dose protocols in both heart rate groups.

Conclusions:

• Low-dose chest pain protocols are effective for visualizing cardiac and thoracic vessels in patients with acute chest pain and stable heart rates.
• This protocol offers a rapid and clear diagnostic tool with reduced radiation exposure.