Gray scale echography with simultaneous a mode presentation a new apparatus for high resolution ultrasonograms
A diagnostic ultrasonic system has been developed for simultaneous display of quantitative A mode and gray scale B mode presentations. An independent calibrator and preset amplification levels allow the apparatus to be calibrated for precise, repeatable examinations. A wide range of echo amplitude information is available to the clinician by the use of selective logarithmic signal compression. Distance measurements in the eye and the orbit are made to 0.1 mm precision and are displayed numerically on the control panel. The newer signal processing techniques provide high‐resolution imaging of ophthalmic structures over a wide system bandwidth. Sensitivity has been improved to image structures heretofore not observable with ultrasonic instruments. This technique is the basis for recently initiated clinical studies.
Vascular studies of the orbital cavity.
The orbital cavity is a dynamic region filled with pulsatile vascular structures. Newly developed ultrasonic-imaging equipment enables the physician to study the in-vivo motion of orbital tissues and their blood vessels to obtain pertinent diagnostic information relating to orbital diseases. Evidence of enhanced vascular activity is observed in endocrine ophthalmopathy and other orbital inflammatory conditions. Blood vessels within tumors help to localize the abnormalities and give clues relating to an accurate tissue diagnosis. These examinations are performed repeatedly and noninvasively in a clinical environment.
Inquiring "Tree of Life" at Home: Persian Classic Literature in English Classes.
The recent decades of English Language Teaching (ELT) appear to be particularly concerned with the marginalisation caused by English linguistic, cultural, and academic colonisation and imperialism. Bold footprints of this academic monopoly can be seen in the wide incorporation of abridged or unabridged British and American literary works in foreign language settings. Such literary products are often legitimised as authentic materials authored by native speakers. Inspired by the idea of incorporating non-native literature and translated first language literature into English classes, the authors of this article sought to explore the possibilities of opening spaces for English translations of Persian classic works of literature in English as foreign language classrooms and tracing the language events that unfolded as a result of incorporating such literature. The participants of this two-semester long action research project were non-English major Iranian female university students, majoring in various fields at Alzahra University, Tehran, Iran. The sense of familiarity the students had with such national literary works led to the emergence of language instances lightened by sparks of virtue, vision, life and art.