title: Feasibility of aortic valve assessment with low dose prospectively triggered adaptive systolic (PTAS) cardiac computed tomography angiography.
abstract: 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.
  
  
  RESULTS
  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.
  
  
  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.
authors.forename: Ashley M
authors.initials: AM
authors.lastname: Lee
authors.forename: Jonathan
authors.initials: J
authors.lastname: Beaudoin
authors.forename: Wai-Ee
authors.initials: WE
authors.lastname: Thai
authors.forename: Bryan
authors.initials: B
authors.lastname: Wai
authors.forename: Gladwin C
authors.initials: GC
authors.lastname: Hui
authors.forename: Manavjot S
authors.initials: MS
authors.lastname: Sidhu
authors.forename: Leif-Christopher
authors.initials: LC
authors.lastname: Engel
authors.forename: Suhny
authors.initials: S
authors.lastname: Abbara
authors.forename: Udo
authors.initials: U
authors.lastname: Hoffmann
authors.forename: Brian B
authors.initials: BB
authors.lastname: Ghoshhajra
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000379:methods*; D001021:Aortic Valve / Q000503:physiopathology*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012189:Retrospective Studies; D013599:Systole; D014057:Tomography, X-Ray Computed / Q000379:methods*