Abstract:
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 < 0.05) and cardiac motion (P < 0.05), while lung clarity was better only in the left lower zone (P < 0.05). IQ was better with regard to image noise (P < 0.05) and low-contrast resolution (P < 0.05) in the non-ECG-tagged reconstructions. No statistical IQ difference between the two types of reconstruction was noted with regard to respiratory motion, contrast media opacification or presence of artefacts. CONCLUSION:The two types of reconstruction provide complementary information for evaluating CTPA results.
journal_name
J Med Imaging Radiat Oncoljournal_title
Journal of medical imaging and radiation oncologyauthors
Ardley ND,Lau KK,Buchan K,Paul E,Troupis JMdoi
10.1111/1754-9485.12147subject
Has Abstractpub_date
2014-01-01 00:00:00pages
303-11issue
3eissn
1754-9477issn
1754-9485journal_volume
58pub_type
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