ULTRASONIC INVESTIGATION OF THE EYE WITH A NEW CONTACT METHOD AND WITH THREE DIFFERENT REAL‐TIME PRESENTATIONS
The ultrasound examination was carried out by means of a crystal with a 40° sector scan, which was pressed either against the eyelid or directly against the sclera. The real‐time display was obtained by either A‐mode, B‐mode or combined A/B‐mode scanning. In clinical applications, both the resolution capacity and the sensitivity of the device were good. A‐mode scanning gave the greatest accurary in amplitude measurement, while the A/B‐mode yielded the most concrete topographic picture of the target.
Erkrankungen des Augapfels aus echographischer Sicht
Mit Ultraschall-Biometrie oder Echometrie wird die Messung von akustisch quasi homogenen Langen und Strecken am lebenden Korper mittels Ultraschall bezeichnet, sowie die davon ausgehende Berechnung von Flachen und Rauminhalten der Gewebe. (Der Begriff „Biometrie“wurde der Biomathematik und Biostatistik entlehnt.)
Retrobulbar air injection with planigraphy.
All too frequently the ophthalmologist finds himself at a loss for adequate methods of diagnosis of orbital space-taking lesions. The effective treatment of such patients is greatly aided by the proper localization of the pathology. Various attempts have been made to localize orbital tumors more accurately or to confirm their presence. The exploration of any orbit presents many difficulties unless a definite tumor mass is palpable or routine neurological and x-ray examinations offer suggestions as to localization of the lesion. Even in such cases more exact localization and determination of the limits of extension of the lesion would be of value. The introduction of a contrast medium into the orbit has been advocated by several investigators as a means of establishing the presence and location of space-occupying lesions. Criteria which should be satisfied in selecting a contrast medium include the following: (1) safety for orbital tissues, (2) uniform diffusion throughout