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KMID : 0858520130170030200
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Journal of the Korean Society of Magnetic Resonance in Medicine
2013 Volume.17 No. 3 p.200 ~ p.206
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Heart-Model-Based Automated Method for Left Ventricular Measurements in Cardiac MR: Comparison with Manual and Semi-automated Methods
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Chae Seung-Hoon
Lee Wahl
Park Eun-Ah
Chung Jin-Wook
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Abstract
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Purpose: To assess the effect of applying an automated heart model based measurements of left ventricle (LV) and compare with manual and semi-automated measurements at Cardiovascular MR Imaging.
Materials and Methods: Sixty-two patients who underwent cardiac 1.5T MR imaging were included. Steady state free precession cine images of 20 phases per cardiac cycle were obtained in short axis views and both 2-chamber and 4-chamber views. Epicardial and endocardial contours were drawn in manual, automated, and semi-automated ways. Based on these acquired contour sets, the end-diastolic (ED) and end-systolic (ES) volumes, ejection fraction (EF), systolic volume (SV) and LV mass were calculated and compared.
Results: In EDV and ESV, the differences among three measurement methods were not statistically significant (P = .399 and .145, respectively). However, in EF, SV, and LV mass, the differences were statistically significant (P=.001, <001, <001, respectively) and the measured value from automated method tend to be consistently higher than the values from other two methods.
Conclusion: An automatic heart model-based method grossly overestimate EF, SV and LV mass compared with manual or semi-automated methods. Even though the method saves a considerable amount of efforts, further manual adjustment should be considered in critical clinical cases.
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KEYWORD
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Magnetic resonance imaging (MRI), Heart, Volumetery
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