منابع مشابه
Ultrasonic Imaging
The basic principles of ultrasonic B-mode imaging aresummarized. Tissue features that generate contrast andsystem features that control image quality are reviewed inthe context of breast cancer imaging. Approaches to signalmodeling, including B-mode and Doppler techniques, arereviewed to guide methodological design and clinical eval-uation. The article concludes with a b...
متن کاملUltrasonic Imaging Systems
The use of ultrasonic imaging systems for non-destructive evaluation is increasing, with particular interest being paid to research into real time and quasi-real time imaging systems. Photos are shown which were taken using an electronically scanned and focused real time ultrasonic imaging system. The system can be operated with longitudinal waves, shear waves, Rayleigh waves, and lamb waves in...
متن کاملQuantitative Ultrasonic Tomographic Imaging
An ultrasonic transmission technique is described which images the velocity variation within metal parts. The arrival time of the first ultrasonic pulse to traverse the object is detected and displayed as a gray scale on a cathode ray tube while the part is being scannerJ hori:tontally and vertically. The velocity variation imaged within severa 1 cast turbine parts will be shown. ihe system can...
متن کاملUltrasonic imaging: safety considerations
Modern ultrasound imaging for diagnostic purposes has a wide range of applications. It is used in obstetrics to monitor the progress of pregnancy, in oncology to visualize tumours and their response to treatment, and, in cardiology, contrast-enhanced studies are used to investigate heart function and physiology. An increasing use of diagnostic ultrasound is to provide the first photograph for b...
متن کاملUltrasonic 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...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1964
ISSN: 0001-4966
DOI: 10.1121/1.1939363