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Comparison of morphometric and morphological OCT Visante and UBM potential in anterior segment imaging
Author(s) -
MILKA M,
WYLEGALA E
Publication year - 2009
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2009.3338.x
Subject(s) - medicine , ophthalmology , ultrasound biomicroscopy , anterior chamber angle , optical coherence tomography , glaucoma , ultrasound , nuclear medicine , radiology
Purpose To compare anterior segment modalities such as Visante OCT and UBM as an important tool for assessing anterior segment examination. Methods 166 patients (96 women and 70 men, mean age 54,32± 9,92 years) various pathologies in anterior segment area and after refractive and glaucoma surgery were examined with both OCT Visante (Zeiss) and UBM (QuantelMedical). In the above examination, we have compared sectored b‐scan image, made by 50Hz UBM head (patient in horizontal position) to scan image displaying anterior chamber (ac‐scan), made by OCT Visante device (patient sitting). Results Both devices promise quantitative information and imaging of corneal pathologies, keratoplasty results and follow up also anterior chamber imaging, direct angle visualization, lens pathologies, diagnostic and postoperative results of cataract and glaucoma. Bland&Altman analysis has shown, that results obtained by UBM in comparison to Visante OCT in anterior chamber depth measurement (AC) were averagely higher by 0.21mm (± 1.96 SD= 0.30) in case of PKP and 0.2mm (± 1.96 SD= 0.23) in case of lamellar keratoplasty. The results for filtration angle measurement, were averagely higher by 3.3 degrees(± 1.96 SD= 4.30) in case of PKP, and 3.4 degrees(± 1.96 SD= 3.9) in case of lamellar keratoplasty. Calculations obtained by ultrasound biomicroscope were slightly higher, however there was no significant statistic difference. Conclusion Both used devices are helpful in clinical practice, however OCT Visante, with high resolution scanes and as a non contact device with shorter examination time is more usefull in every day practice. Moreover UBM is an indispensable tool for anterior segment tumors involving ciliary body.