Ultrasonographic analysis of senile cataractous lens of dogs and its correlation to phacoemulsification

Abstract

This study aimed to evaluate the effectiveness of a computer-assisted ultrasound analysis of senile dogs cataractous lens and identify its correlation to phacoemulsification surgical parameters. Simultaneous A-and B-mode ultrasonic evaluation of the lens was performed on 15 dogs with cataract. A computer-assisted image analysis was used to objectively calculate the lens echogenicity. Following ultrasonographic examination the cataracts were removed by phacoemulsification and the ultrasonographic and phacoemulsification findings were compared to identify possible correlations. Lens echogenicity obtained by the computer-assisted ultrasonographic analysis correlated to the phacoemulsification time, such that the whiter the ultrasound image, the longer was the phacoemulsification time. The B-mode ultrasonography was helpful for the prediction of lens opacity location, but not predictive of lens hardness.

Effects of intracameral ascorbic acid on the corneal endothelium of dogs undergoing phacoemulsification

“…Pre‐ and postoperative procedures were the same as those adopted by the main centers, with few modifications. The frequency and periods of drug administration were structured to meet national and international protocols …”

Ultrasound methods used for planning for cataract surgery in dogs

“…Ophthalmic ultrasounds provide information on echogenicity and echotexture as well as on lens thickness, length, and position (BENTLEY et al, 2003;MCMULLEN et al, 2006;LAUS, 2007;HERRERA, 2008, MARTINS et al, 2011. Ophthalmic ultrasounds are useful not only in surgical planning, but also to assess the position of the synthetic lens inserted after phacoemulsification (HERRERA, 2008).…”

“…Ophthalmic ultrasounds are useful not only in surgical planning, but also to assess the position of the synthetic lens inserted after phacoemulsification (HERRERA, 2008). Studies on lens thickness in dogs with cataract have were performed (WILLIAMS, 2004;MARTINS et al, 2011).…”

“…Probes of 20MHz are the most commonly used in veterinary ophthalmology frequencies range from 15 to 20 MHz (MARTINS et al, 2011). Smaller transducers of sector, micro-convex, or linear types are preferable.…”

Extraction of Canine Cataract Object for Developing Handy Pre-diagnostic Tool with Fuzzy Stretching and ART2 Learning

“…The first step in diagnosing cataract and other eye-related diseases for pet dogs is to identifying abnormalities of lens structure while the final decision whether and when the surgery is necessary is up to the veterinarian. Many computer-assisted techniques have been developed such as ultrasonography [6,7], magnetic resonance imaging (MRI) [8], and even very recent endoscopic evaluation technique [9] to assist the medical expert. And, if we can extract characteristic features for the diagnosis, we may apply machine learning techniques in this field [10].…”