Abstract

Disclosed is an arrangement for use in transesophageal ultrasonic imaging of the heart (and other translumenal applications) in which both the position and orientation of an ultrasonic probe that generates an ultrasonic scanning pattern is determined in terms of a three-dimensional coordinate system that lies outside the patient's body and is produced by a magnetic field generator. The arrangement provides two-dimensional multi-planar scanning in which the ultrasonic scanning pattern is selectively positionable relative to rotation about two orthogonal coordinate axes that are mutually orthogonal to the longitudinal axis of the ultrasonic scanning probe. Provision is made for generating electrical signals indicative of rotational position of the scanning pattern relative to each of the two axes of rotation. The signals representative of the rotational position of the scanning pattern allow registration between the two-dimensional multi-plane ultrasonic images for purposes such as a computer generation of three-dimensional cardiac images. The ultrasonic probe also includes a flexure region for selectively positioning the probe in the esophagus or other lumen and a heart sound microphone for use in temporal registration of the ultrasonic imaging relative to one or more events in the cardiac cycle.

Other References

• Brinkley, J. F., et al., "In vitro Evaluation of an Ultrasonic Three-Dimensional Imaging and Volume System," Ultrasonic Imaging 4:126-139 (1982)
• King, D. L., Al-Banna, S. J., and Larach, D. R., "A New Three-Dimensional Random Scanner for Ultrasonic/Computer Graphic Imaging of the Heart,"
• Martin, R. W., Bashein, G. Zimmer, R. and Sutherland, J., "An Endoscopic Micromanipulator for multiplanar Transesophageal Imaging," Ultrasound in Med. & Biol. 12:965-975 (1986)
• Bashein, G., Sheenan, F. H. Nessly, M. L., Detmer, P. R. and Martin, R. W., "Three-dimensional transesophageal echocardiography for depiction of regional left-ventricular performance: initial results and future directions," International Journal of Cardiac Imaging (1993)
• King MD, D. L., King Jr., D. L., Yi-Ci Shao MS, M., "Three-Dimensional Spatial Registration and Interactive Display of Position and Orientation of Real-time Ultrasound Images", J Ultrasound Med 9:525-532 (1990)
• Pandian, M. D., N. G. et al. "Three-Dimensional and Four-Dimensional Transeophageal Echocardiographic Imaging of the Heart and Aorta in Humus Using a Computed Tomographic Imaging Probe," Echocardiography: 9:677-687 (Nov. 1992)
• Wollschlager, H., "Tee & 3-Dimensional Reconstruction," 10th Symposium of Echocardiology: 12(Jun. 23-25, 1993)
• Moritz, W. E., Medema, D. K., McCabe, D., Pearlman, A. S., "Three-Dimensional Imaging and Volume Determination Using a Series of Two-Dimensional Ultrasonic Scans", Rijsterborgh H., ed: Echorcardiology: 449-454 (1981