Sk. Alam et al., DETECTION OF INTRAOCULAR-PRESSURE CHANGE IN THE EYE USING SONOELASTICDOPPLER ULTRASOUND, Ultrasound in medicine & biology, 20(8), 1994, pp. 751-758
Citations number
20
Categorie Soggetti
Radiology,Nuclear Medicine & Medical Imaging",Acoustics
We report the first use of sonoelastic Doppler ultrasound for in vivo
and in vitro clinical studies of intraocular pressure (IOP). The metho
d involves low-amplitude and low-frequency sonic excitation of the eye
, and detection of the resulting vibration using Doppler ultrasound. A
dependence of the frequency of resonance of the eye on the IOP has be
en observed in both in vitro and in vivo experiments. Preliminary in v
itro experiments have been performed using eviscerated and enucleated
human and pig eyes. As little as 4 mm Hg change in IOP has been found
detectable in these experiments. Preliminary in vivo experiments also
showed promising results in this regard. We present a simple model for
the resonances of the eye, a method to detect the amplitude of vibrat
ion using Doppler ultrasound and results from the in vitro and in vivo
experiments.