منابع مشابه
analysis of reading comprehension needs of the students of paramedical studies: the case of the students of health information management (him)
چکیده ندارد.
15 صفحه اولUltrasonic colour Doppler imaging.
Ultrasonic colour Doppler is an imaging technique that combines anatomical information derived using ultrasonic pulse-echo techniques with velocity information derived using ultrasonic Doppler techniques to generate colour-coded maps of tissue velocity superimposed on grey-scale images of tissue anatomy. The most common use of the technique is to image the movement of blood through the heart, a...
متن کاملContinuous wave ultrasonic Doppler tomography.
In continuous wave ultrasonic Doppler tomography (DT), the ultrasonic beam moves relative to the scanned object to acquire Doppler-shifted frequency spectra which correspond to cross-range projections of the scattering and reflecting structures within the object. The relative motion can be circular or linear. These data are then backprojected to reconstruct the two-dimensional image of the obje...
متن کاملStudy of the cardiac arrhythmias by the ultrasonic Doppler method.
The Doppler tracing is a sensitive method for depicting movement of the heart wall, valves, and blood flow. This communication reports the authors' experience with the Doppler method in normal persons and patients with various cardiac arrhythmias. Three main components are recognized in the Doppler tracing: the presystolic component, a; component v, due to systolic movement of the ventricles; a...
متن کاملProtein Studies on the Human Vitreous Body
INVESTIGATIONS of the vitreous body are beset with numerous technical difficulties. Its large water content and the instability of its structure make it difficult to obtain unchanged vitreous body in large amounts. Through the slit lamp and in fixed histological preparations (Lauber, 1936; Baurmann, 1926; Comberg, 1924; Duke-Elder, 1930), the human vitreous body appears as a structured mass. In...
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ژورنال
عنوان ژورنال: Eye
سال: 1988
ISSN: 0950-222X,1476-5454
DOI: 10.1038/eye.1988.18