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(Circulation. 1999;99:1-6.)
© 1999 American Heart Association, Inc.

Circulation Electronic Pages

Dynamic Holographic Imaging of the Beating Human Heart

Presented in part at the 70th Scientific Sessions of the American Heart Association, Orlando, Fla, November 10–13, 1997, and published in abstract form (Circulation. 1997;96[suppl I]:I-698).

Patrick R. Hunziker, MD; Steven Smith, BS; Marielle Scherrer-Crosbie, MD; Noah Liel-Cohen, MD; Robert A. Levine, MD; Ryder Nesbitt, BS; Stephen A. Benton, PhD; Michael H. Picard, MD

From the Cardiac Ultrasound Laboratory, Massachusetts General Hospital, Boston, and the Spatial Imaging Group (S.S., R.N., S.A.B.), Media Laboratory, Massachusetts Institute of Technology, Cambridge.

Correspondence to Michael H. Picard, MD, Cardiac Ultrasound Laboratory VBK 508, 55 Fruit St, Boston MA 02114. E-mail picard{at}olorin.mgh.harvard.edu

Abstract

Background—Currently, the reporting and archiving of echocardiographic data suffer from the difficulty of representing heart motion on printable 2-dimensional (2D) media.

Methods and Results—We studied the capability of holography to integrate motion into 2D echocardiographic prints. Images of normal human hearts and of a variety of mitral valve function abnormalities (mitral valve prolapse, systolic anterior motion of the mitral leaflets, and obstruction of the mitral valve by a myxoma) were acquired digitally on standard echocardiographic machines. Images were processed into a data format suitable for holographic printing. Angularly multiplexed holograms were then printed on a prototype holographic "laser" printer, with integration of time in vertical parallax, so that heart motion became visible when the hologram was tilted up and down. The resulting holograms displayed the anatomy with the same resolution as the original acquisition and allowed detailed study of valve motion with side-by-side comparison of normal and abnormal findings. Comparison of standard echocardiographic measurements in original echo frames and corresponding hologram views showed an excellent correlation of both methods (P<0.0001, r²=0.979, mean bias=2.76 mm). In this feasibility study, both 2D and 3D holographic images were produced. The equipment needed to view these holograms consists of only a simple point-light source.

Conclusions—Holographic representation of myocardial and valve motion from echocardiographic data is feasible and allows the printing on a 2D medium of the complete heart cycle. Combined with the recent development of online holographic printing, this novel technique has the potential to improve reporting, visualization, and archiving of echocardiographic imaging.

Key Words: echocardiography • imaging • heart diseases • mitral valve

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