Thin-section CT of the lung: does electrocardiographic triggering influence diagnosis?

Area of Science:

• Radiology
• Medical Imaging
• Pulmonary Diagnostics

Background:

• Thin-section computed tomography (CT) is crucial for lung imaging.
• Electrocardiographic (ECG) triggering aims to reduce motion artifacts and improve image quality.
• The clinical utility of ECG-triggered CT for lung imaging requires evaluation.

Purpose of the Study:

• To assess the impact of prospective ECG triggering on image quality in thin-section CT of the lung.
• To evaluate the effect of ECG triggering on the diagnostic outcome of lung CT scans.
• To compare ECG-triggered and non-triggered thin-section CT techniques.

Main Methods:

• Forty-five patients underwent both prospectively ECG-triggered and non-triggered thin-section CT of the lung.
• Radiologists rated subjective image quality (noise, artifacts, diagnostic accessibility).
• Quantitative image noise and signal-to-noise ratios were measured; statistical analysis was performed using Wilcoxon signed rank and paired sign tests.

Main Results:

• Subjective assessment revealed reduced motion artifacts in specific lung regions with ECG triggering.
• Diagnostic accessibility was significantly higher only in the left lower lobe with triggered CT.
• No significant differences in diagnostic outcome were observed between triggered and non-triggered techniques; quantitative analysis showed increased noise and lower signal-to-noise ratios with triggered CT.

Conclusions:

• Prospective ECG triggering in thin-section lung CT does not enhance diagnostic accuracy.
• The benefits of ECG triggering do not outweigh the need for additional resources in routine clinical practice.
• ECG-triggered thin-section CT of the lung is not recommended for general use.