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Original research article


Horizontal Long Axis Imaging Plane for Evaluation of Right Ventricular Function on Cardiac Magnetic Resonance Imaging.

Abhishek ChaturvediJoseph WhitnahJeffrey H MakiTimothy BaranLee M Mitsumori
Department of Radiology, University of Washington School of Medicine, 1959 Pacific Street, Seattle, WADepartment of Imaging Sciences, University of Rochester, 601 Elmwood Avenue, RochesterDepartment of Radiology, Straub Clinic and Hospital, Honolulu, HI, NY, USA
Date of Submission: 13-Oct-2016, Date of Acceptance: 13-Nov-2016, Date of Web Publication: 29-Dec-2016.
Corresponding Author:
Corresponding Author

Abhishek Chaturvedi

Department of Radiology, University of Washington School of Medicine, 1959 Pacific Street, Seattle, WA, USA. Department of Imaging Sciences, University of Rochester, 601 Elmwood Avenue, Rochester, NY, USA.
E-mail: toabhic@gmail.com

Corresponding Author:
Corresponding Author

Abhishek Chaturvedi

Department of Radiology, University of Washington School of Medicine, 1959 Pacific Street, Seattle, WA, USA. Department of Imaging Sciences, University of Rochester, 601 Elmwood Avenue, Rochester, NY, USA.
E-mail: toabhic@gmail.com

DOI: 10.4103/2156-7514.197076 Facebook Twitter Google Linkedin

ABSTRACT



Purpose: The purpose of this study was to evaluate a horizontal long axis (HLA) magnetic resonance imaging (MRI) plane aligned to the long axis of the right ventricular (RV) cavity for functional analysis by comparing the measurement variability and time required for the analysis with that using a short-axis (SAX) image orientation.
Materials and Methods: Thirty-four cardiac MRI exams with cine balanced steady-state free precession image stacks in both the SAX and the HLA of the RV (RHLA) were evaluated. Two reviewers independently traced RV endocardial borders on each image of the cine stacks. The time required to complete each set of traces was recorded, and the RV end-diastolic volume, end-systolic volume, and ejection fraction were calculated. Analysis times and RV measurements were compared between the two orientations.
Results: Analysis time for each reviewer was significantly shorter for the RHLA stack (reviewer 1 = 6.4 ± 1.8 min, reviewer 2 = 6.0 ± 3.3 min) than for the SAX stack (7.5 ± 2.1 and 6.9 ± 3.6 min, respectively; P < 0.002). Bland–Altman analysis revealed lower mean differences, limits of agreement, and coefficients of variation for RV measurements obtained with the RHLA stack.
Conclusions: RV functional analysis using a RHLA stack resulted in shorter analysis times and lower measurement variability than for a SAX stack orientation.
Keywords: Analysis Time, Magnetic Resonance Imaging, Observer Variability, Right Ventricle, Ventricular Function

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