A comparison of bolus track and test bolus computed tomography pulmonary angiography and the implications on pulmonary and aortic vessel enhancement, effective dose and suboptimal scan rate

Author:

Murphy Aoife1ORCID,White Helen2

Affiliation:

1. Medneo London Centre London UK

2. Birmingham City University Birmingham UK

Abstract

AbstractIntroductionBolus track and test bolus are the most commonly used contrast timing protocols to undertake computed tomography pulmonary angiography (CTPA). The aim of this study was to compare test bolus and bolus track contrast enhancement protocols in terms of enhancement of the pulmonary vessels and aorta, radiation dose and suboptimal scan rate to determine the optimal technique for CTPA.MethodsA total of 200 CTPA examinations (100 using each protocol) performed between January and February 2021 were assessed retrospectively. All scans were performed on a 2x128 Dual Source Siemens Drive Scanner. CT attenuation was measured in Hounsfield Units (HU), with measurements taken from the main pulmonary trunk, right pulmonary artery and left pulmonary artery, ascending and descending aorta. The mean effective dose was calculated from the dose‐length product (DLP). The suboptimal scan rate was calculated as the percentage of examinations below 210HU.ResultsThe average HU of the pulmonary arteries was 358 HU ± SD 129.2 in the test bolus group and increased to 394 HU ± SD 133.9 in the bolus track group with a P value of ≤0.05. The average HU of the aorta was 235 HU ± SD 82.8 in the test bolus group and increased to 319 HU ± SD 91.8 in the bolus track group with a P value of <0.001. Although not statistically significant, the mean effective dose was reduced by 4.2% for the bolus track protocol (2.4 mSv vs. 2.5 mSv, P > 0.05). Fewer suboptimal scans were performed with the bolus track protocol (5 scans <210HU Bolus Track vs. 9 scans <210HU Test Bolus).ConclusionThe bolus track protocol results in increased enhancement of the pulmonary arteries and aorta, with the added benefits of a lower suboptimal scan rate and lower effective dose.

Publisher

Wiley

Subject

Radiology, Nuclear Medicine and imaging,Radiological and Ultrasound Technology

Reference26 articles.

1. Panel Discussion: Pulmonary Embolism Imaging and Outcomes

2. Risk Factors and Short-term Mortality of Venous Thromboembolism Diagnosed in the Primary Care Setting in the United Kingdom

3. Centers for Disease Control and Prevention.Data and statistics on venous thromboembolism.2020. [cited 2022 April 11]. Available from:https://www.cdc.gov/ncbddd/dvt/data.html.

4. National Institute for Health and Care Excellence.Venous thromboembolic diseases: diagnosis management and thrombophilia testing. [NG158].2020. [cited 2022 April 11]. Available from:https://www.nice.org.uk/guidance/NG158.

5. Weight-Adjusted Contrast Administration in the Computed Tomography Evaluation of Pulmonary Embolism

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