Effects of electrocardiogram gating on CT pulmonary angiography image quality

Introduction Pulmonary embolism (PE) is the third most common cause of death from cardiovascular disease. Computed‐tomographic pulmonary angiography (CTPA) is an accurate and safe test for diagnosing PE. The aim of this retrospective analysis was to evaluate the effects on image quality (IQ) of elec...

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Bibliographic Details
Published in:Journal of medical imaging and radiation oncology 2014-06, Vol.58 (3), p.303-311
Main Authors: Ardley, Nicholas D, Lau, Ken K, Buchan, Kevin, Paul, Eldho, Troupis, John M
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Angiography - methods
Cardiac-Gated Imaging Techniques - methods
cardiopulmonary anatomy
computed tomography
Contrast agents
Contrast Media - administration & dosage
ECG gating
Electrocardiography
Female
Humans
Injections, Intravenous
Intelligence tests
Iohexol - administration & dosage
Male
Medical imaging
Middle Aged
Observer Variation
Pulmonary Artery - diagnostic imaging
pulmonary embolism
Pulmonary Embolism - diagnostic imaging
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Reproducibility of Results
Sensitivity and Specificity
Tomography, X-Ray Computed - methods
vascular
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Summary:Introduction Pulmonary embolism (PE) is the third most common cause of death from cardiovascular disease. Computed‐tomographic pulmonary angiography (CTPA) is an accurate and safe test for diagnosing PE. The aim of this retrospective analysis was to evaluate the effects on image quality (IQ) of electrocardiogram (ECG) gating during CTPA. Methods Fifty consecutive patients presenting for CTPA were included in the study. A single acquisition was performed, resulting in two reconstructions: one at 75% of the R–R interval and the other without ECG influence. IQ evaluation was undertaken by two radiologists, focusing on respiratory and cardiac motion, image noise, low‐contrast resolution, vessel and lung clarity, contrast media opacification and artefacts. Various regions of the lungs and vasculature were evaluated, and IQ scores were statistically compared. Results For the ECG‐tagged reconstructions, IQ was noted to be better overall with regard to vessel clarity (P 
ISSN:1754-9477
1754-9485
DOI:10.1111/1754-9485.12147