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Non-Gated Triple Flash Coronary Computed Tomographic Angiography in Patients with Atrial Fibrillation

Rami M Abazid1, Osama A Smettei1, Akram F Eldesoky1

  • 1Prince Sultan Cardiac Center Qassim (PSCCQ), King Fahad Specialist Hospital.

Acta Cardiologica Sinica
|August 2, 2018
PubMed

Insights

Non-gated triple Flash (NGTF) coronary computed tomography angiography (CTA) offers similar image quality to retrospectively gated helical (RGH) scans in atrial fibrillation (AF) patients, with substantially lower radiation exposure.

Area of Science:

  • Cardiovascular Imaging
  • Radiology
  • Medical Technology

Background:

  • Atrial fibrillation (AF) poses challenges for coronary computed tomography angiography (CTA) image acquisition.
  • Current CTA protocols for AF patients are not optimized.
  • Development of a single-heartbeat CTA protocol for AF is needed.

Purpose of the Study:

  • To design and evaluate a single-heartbeat coronary CTA protocol for patients with atrial fibrillation.
  • To compare image quality and radiation dose between non-gated triple Flash (NGTF) and retrospectively gated helical (RGH) CTA scan modes.

Main Methods:

  • 32 AF patients with low coronary artery disease probability underwent CTA using a 256-slice scanner.
  • Twelve patients received NGTF CTA, and 20 patients received RGH CTA.
  • Coronary artery image quality was assessed using a 4-point scale; radiation dose was recorded.

Main Results:

  • No significant difference in image quality scores between NGTF and RGH scans (2.8 ± 0.8 vs. 2.9 ± 0.6).
  • Similar rates of coronary arteries with extensive blurring across both protocols (8.3% NGTF vs. 6.6% RGH).
  • Significantly lower radiation dose with NGTF (382 ± 35 mGy) compared to RGH (835 ± 146 mGy).

Conclusions:

  • Single-heartbeat NGTF CTA provides comparable image quality to RGH CTA in AF patients.
  • NGTF CTA significantly reduces radiation exposure in AF patients.
  • Further research is needed to assess NGTF protocol applicability in next-generation CT scanners.
Abstract

Keywords:
Computed tomographic angiographyFlash spiralNon-gatedRadiationRetrospectively gated helical

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