Srimati Kanuri Santhamma Center for Vitreo-Retinal Diseases, Anant Bajaj Retina Institute, L V Prasad Eye Institute, Hyderabad, Telangana, India.
Indian J Ophthalmol. 2023 Aug;71(8):3118-3119. doi: 10.4103/IJO.IJO_608_23.
Ultrasound biomicroscopy (UBM) is a noninvasive imaging modality that enables in-vivo visualization of the structures of the anterior segment of the eye. Unlike routine ophthalmic diagnostic ultrasound which uses frequencies of 5-10 MHz, UBM utilizes ultrasound frequencies in the range of 50-100 MHz. The high-frequency probes in UBM allows for higher resolution and better visualization of subsurface ocular structures, even in the presence of anatomic or pathological obscuration. UBM has qualitative as well as quantitative applications in various disorders affecting the anterior segment of the eye. Despite its huge importance, many clinicians lack in knowledge about the technique and its clinical usefulness. The current educational video aims to address this gap in knowledge by highlighting the technique and various clinical indications of UBM.
The purpose of this video is to demonstrate the technique of UBM and showcase its quantitative and qualitative implications and importance through various clinical cases.
UBM is an imaging technique that assesses the depth of tissue structures by measuring the time delay of the returning ultrasound signal. This modality is capable of measuring the size of various structures within the eye, such as the cornea, iris, ciliary body, sclera, and the depth of the anterior and posterior chamber. To perform a UBM, a transducer is inserted into a specially designed eye cup filled with distilled water, creating a water bath environment. Axial and longitudinal scans can be performed in a similar fashion as in routine diagnostic B-scan ultrasound. Quantitative indications for UBM depicted in this video include measurements of corneal thickness, depth of the anterior chamber, and the width of the angle. The video also showcases how UBM can aid in the diagnosis and management of various anterior segment disorders like angle-closure glaucoma, plateau iris configuration, secondary glaucoma, and anterior uveitis with complicated cataract. Qualitative indications for UBM highlighted in this video include its role in intermediate uveitis, ocular hypotony, ocular surface tumors, cystic lesions of iris, and identifying the location and type of intraocular foreign bodies in the anterior segment based on the type of artifact seen. Additionally, the video shows the applications of UBM in scleral and episcleral pathologies.
This video will educate clinicians about the technique of UBM and showcase a bouquet of UBM findings in various case scenarios, helping one to better understand the potential of this modality in clinical practice.
超声生物显微镜（UBM）是一种非侵入性成像方式，可在活体中可视化眼前节的结构。与使用 5-10MHz 频率的常规眼科诊断超声不同，UBM 使用 50-100MHz 的超声频率。UBM 中的高频探头允许更高的分辨率和更好的亚表面眼部结构可视化，即使存在解剖或病理遮挡。UBM 在各种影响眼前节的疾病中有定性和定量的应用。尽管它非常重要，但许多临床医生对该技术及其临床应用知之甚少。本教育视频旨在通过突出 UBM 的技术及其各种临床适应证来弥补这一知识空白。
本视频旨在演示 UBM 技术，并通过各种临床病例展示其定量和定性意义和重要性。
UBM 是一种通过测量返回超声信号的时间延迟来评估组织结构深度的成像技术。该模式能够测量眼睛内各种结构的大小，如角膜、虹膜、睫状体、巩膜以及前房和后房的深度。要进行 UBM，将换能器插入充满蒸馏水的特殊设计的眼杯中，形成水浴环境。可以以与常规诊断 B 型超声相似的方式进行轴向和纵向扫描。本视频中描绘的 UBM 的定量适应证包括角膜厚度、前房深度和角度宽度的测量。该视频还展示了 UBM 如何有助于诊断和管理各种眼前段疾病，如闭角型青光眼、平坦型虹膜构型、继发性青光眼和伴有复杂白内障的前葡萄膜炎。本视频中突出的 UBM 的定性适应证包括其在中间葡萄膜炎、眼压低、眼表肿瘤、虹膜囊性病变以及根据看到的伪影类型识别前节内眼内异物的位置和类型中的作用。此外，该视频还展示了 UBM 在巩膜和球结膜病变中的应用。
本视频将使临床医生了解 UBM 技术，并展示各种病例场景中的一系列 UBM 发现，帮助人们更好地理解该模式在临床实践中的潜力。
