Person:
Beaudoin, Jonathan

Profile Picture

Email Address

AA Acceptance Date

Birth Date

Research Projects

Organizational Units

Job Title

Last Name

Beaudoin

First Name

Jonathan

Name

Beaudoin, Jonathan

Filters

20131

Settings

Author's Publications: search.filters.isAuthorOfPublication.c6fb02d2-7b11-4ced-b495-2b28f53dd39a

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Publication
    Feasibility of aortic valve assessment with low dose prospectively triggered adaptive systolic (PTAS) cardiac computed tomography angiography
    (BioMed Central, 2013) Lee, Ashley M; Beaudoin, Jonathan; Wai, Bryan; Thai, Wai-Ee; Hui, Gladwin C; Sidhu, Manavjot S; Engel, Leif-Christopher; Abbara, Suhny; Hoffmann, Udo; Ghoshhajra, Brian
    Background: Cardiac computed tomography angiography (CTA) is feasible for aortic valve evaluation, but retrospective gated protocols required high radiation doses for aortic valve assessment. A prospectively triggered adaptive systolic (PTAS) cardiac CT protocol was recently described in arrhythmia using second-generation dual-source CT. In this study, we sought to evaluate the feasibility of PTAS CTA to assess the aortic valve at a low radiation dose. Findings: A retrospective cohort of 29 consecutive patients whom underwent PTAS protocols for clinical indications other than aortic valve assessment and whom also received echocardiography within 2 months of CT, was identified. Images were reviewed for aortic valve morphology (tricuspid/bicuspid/prosthetic) and stenosis (AS) by experienced blinded readers. Accuracy versus echocardiography and radiation doses were assessed. All PTAS coronary CTAs were clinically diagnostic with 0 un-evaluable coronary segments. The accuracy of PTAS for aortic valve morphology was 92.6%, and for exclusion of severe AS was 93.1%. Two exams were un-evaluable for the aortic valve due to inadequate number of phases archived for interpretation. Total radiation dose was a median of 2.8 mSv (interquartile range 1.4–4.4 mSv). Conclusions: PTAS CTA protocols using second-generation dual-source CT for aortic valve evaluation are feasible at low doses. This protocol should be investigated further in larger cohorts.