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Ronald H. Silverman, Frederic L. Lizzi, Bogdan G. Ursea, Mark J. Rondeau, Nashwa Badr Eldeen, Andy Kaliscz, Harriet O. Lloyd, D. Jackson Coleman; High-Resolution Ultrasonic Imaging and Characterization of the Ciliary Body. Invest. Ophthalmol. Vis. Sci. 2001;42(5):885-894. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
purpose. To develop a means for noninvasive in vivo visualization of the ciliary
processes using very-high-frequency (50 MHz) ultrasound and to develop
quantitative morphologic descriptors that may relate to physiologic
methods. The region of the ciliary body was scanned with very-high-frequency
ultrasound, both in rabbits and in normal human subjects. Data were
acquired in a series of planes so that the spacing between them was
less than the beam width of the transducer in its focal plane.
Three-dimensional perspective images were constructed, representing the
anatomy of the angle region, including the ciliary processes. The
automatically detected boundaries of the ciliary processes were
analyzed to compute their periphery, area, shape factor, and fractal
dimension. These measures were compared between the human and the
rabbit eye and analyzed for periodicities related to the spacing of
results. Three-dimensional images allowed visualization of the radial
arrangement of the processes. All biometric descriptors were
significantly different between the rabbit and human eye and showed
periodicities consistent with spacing between processes.
conclusions. The methods described in this report are sensitive descriptors of the
state of the ciliary processes. These techniques may be of value in
measurement of changes in the ciliary body associated with disease,
medical therapy, and aging.
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