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sector scan

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sec·tor scan

in ultrasonography, a system in which the transducer or transmitted ultrasound beam is rotated through an angle, resulting in a wedge-shaped image.
Farlex Partner Medical Dictionary © Farlex 2012

sec·tor scan

(sek'tŏr skan)
ultrasonography A system in which the transducer or transmitted ultrasound beam is rotated through an angle, resulting in a wedge shaped image.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive
It is suggested to refer to literature [13] for further classification of specific MS type, such as circular scan, sector scan, raster scan, and helical scan.
In Chapter 8, the theory of radar tracking and measurements is presented, starting with brief summaries of conical scan and sector scan trackers, and proceeding to more detailed considerations of monopulse systems.
As shown in Figure 6, the EW receiver will observe a scan pattern similar to the sector scan of the TWS radar, but the peak amplitude of the main beam will vary with the elevation of each scan relative to the receiver's location.
According to EPRI, the technique greatly reduces the number of false calls because of the improved resolution created by the one-degree increment sector scan.
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