Coleman D Jackson, Silverman Ronald H, Rondeau Mark J, Lloyd Harriet O, Daly Suzanne
Margaret M. Dyson Vision Research Institute, Department of Ophthalmology, Weill Medical College of Cornell University, New York, NY.
Expert Rev Ophthalmol. 2006 Oct 1;1(1):63-76. doi: 10.1586/17469899.1.1.63.
Ultrasound has become as indispensable as indirect ophthalmoscopy or slit lamp in evaluation of the eye. It is an important adjuvant for the clinical assessment of a variety of ocular and orbital diseases. Advances in instrumentation, higher frequencies and more sensitivity and resolution have resulted in continuous improvement in image quality.Very high frequency ultrasound uses frequencies in the range of 35 to 100 MHz to show greater detail of the anterior segment. Penetration is limited for these higher frequencies to only a few millimeters and thus only the anterior vitreous behind the ciliary body and lens can be imaged. High frequency ultrasound in the range of 20 to 30 MHz has a penetration of about 10 mm and can be used for posterior pole evaluation of the retina and choroid.
在眼部评估中,超声已变得与间接检眼镜或裂隙灯一样不可或缺。它是各种眼和眼眶疾病临床评估的重要辅助手段。仪器设备的进步、更高的频率以及更高的灵敏度和分辨率使得图像质量不断提高。甚高频超声使用35至100兆赫兹范围内的频率来显示眼前节的更多细节。这些较高频率的穿透深度仅限制在几毫米,因此只能对睫状体和晶状体后方的前部玻璃体进行成像。20至30兆赫兹范围内的高频超声穿透深度约为10毫米,可用于视网膜和脉络膜的后极评估。