title: Letter to the editor regarding paper "Automatic computation of left ventricular volume changes over a cardiac cycle from echocardiography images by nonlinear dimensionality reduction".
authors.affiliation: Modarres Hospital, Institute of Cardiovascular Research, Shahid Beheshti University of Medical Science, Tehran, Iran, sranjbar@ipm.ir.
authors.forename: Saeed
authors.initials: S
authors.lastname: Ranjbar
authors.forename: Mersedeh
authors.initials: M
authors.lastname: Karvandi
mesh_terms: D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D014463:Ultrasonography