Personal computer-based 3-dimensional ultrasound biomicroscopy of the anterior segment
R. Iezzi, R. B. Rosen, C. Tello, J. Liebmann, J. B. Walsh and R. Ritch
Department of Ophthalmology, New York Eye and Ear Infirmary, (NY), USA.
OBJECTIVE: To develop a practical, inexpensive system for 3-dimensional
ultrasound biomicroscopic imaging of the anterior segment with a
commercially available high-frequency ultrasound imager and a personal
computer. METHODS: Sequential, high-frequency, ultrasound biomicroscopic
images of the anterior segment were obtained with a motorized scanning
control arm designed in our imaging laboratory. Images were acquired by a
personal computer-based video capture device. Ultrasound slice data were
then reconstructed as 3-dimensional volumetric images by a personal
computer and commercially available software. RESULTS: Four 3-dimensional
visualization formats were developed to enhance the clinical utility of
high-frequency ultrasound. Rotational animation sequences were created that
detailed the extent and anatomy of a filtering bleb, intraocular lens
subluxation, focal angle closure from an iridociliary cyst, intraocular
foreign bodies, and an iris tumor. CONCLUSIONS: Three-dimensional,
high-frequency ultrasound of the anterior segment enhances our ability to
visualize spatial relationships between adjacent anatomic structures. The
low cost and ease of use of this system make widespread clinical
application practical.
