Electronically-scanned ophthalmic ultrasound.
A linear-array ultrasonic system has been developed for ophthalmic application. The clinical apparatus gives real-time digital imaging at higher speeds and sensitivity compared to contemporary mechanically-scanned single transducer equipment. The linear-array system is electronically scanned to produce 60 images s-1 with 64 gray-tone levels. The 256 X 580 pixel B-mode image is presented simultaneously with an A-mode display on a television monitor. Fast-frame imaging at high sensitivity has special advantages in ophthalmic differential diagnosis enabling a more comprehensive evaluation of retinal, vitreous and orbital pathology. Imaging of fine blood vessels has improved ultrasonic diagnosis of ocular neoplasms and inflammatory conditions. Clinical advantages of this apparatus and special technical specifications are discussed in this report.
D005128:Eye Diseases / Q000175:diagnosis*; D006801:Humans; D012163:Retinal Detachment / Q000175:diagnosis; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation* / Q000379:methods; D014822:Vitreous Body / Q000033:anatomy & histology