Combined 50- and 20-MHz Frequency Ultrasound Imaging in Intermediate Uveitis

Anterior segment biometry with 2 imaging technologies: Very-high-frequency ultrasound scanning versus optical coherence tomography

“…Different applications have been described for this ophthalmic technology; these include intraocular tumors analysis, 6,7 determination of the position of a pIOL, 14,15 planning for refractive surgery retreatment, 16 microkeratome cut analysis in LASIK, 17 study of intraocular pathology, [5][6][7]18 and analysis of some posterior segment structures. 19 As resolution normally improves with frequency, VHF waves are used for most anterior segment imaging, providing an axial resolution of less than 40 mm.…”

“…1 In addition, anterior segment analysis is a valuable tool for a better understanding of the outcomes of cataract surgery (IOL position, capsule opacification) 2 and keratorefractive surgery (corneal transparency, configuration of the flap, corneal thickness profiles) 3,4 as well as anterior segment pathology (tumors, uveitis, aniridia). [5][6][7] These uses have generated great expectations for the field of anterior segment imaging.…”

Estudo comparativo entre imagens ultra-sonográficas obtidas com sondas de 10MHz e 20 MHz na avaliação de anormalidades do segmento posterior do globo ocular

“…A ultra-sonografia ocular é um exame não invasivo, eficaz e versátil, que propicia diagnóstico seguro de uma grande variedade de doenças oculares, e que vem sendo cada vez mais aperfeiçoado com novas tecnologias (7,8) . Há alguns anos, é bem estabelecido o uso de sondas com maiores freqüências para a avaliação do segmento anterior do globo ocular (9,10) , mas as vantagens trazidas por sondas desse tipo não são em todo aplicá-veis para o exame do segmento posterior.…”

Retinal imaging in uveitis

“…The 20-MHz frequency probes can detect the typical snowbank in intermediate uveitis. 50 Ultrasonography is also useful in the detection of posterior vitreous detachment, a common finding in eyes with vitreous inflammation. 51 Ultrasound can be used to monitor serous retinal detachments in VKH disease and sympathetic ophthalmia.…”