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KMID : 0357520150380010007
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Journal of Radiological Science and Technology
2015 Volume.38 No. 1 p.7 ~ p.15
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Influence to the Doppler Images by the Defects of SAE in the Probe of Medical Ultrasonic Scanners
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Lee Kyung-Sung
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Abstract
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A ultrasonic probe is veryimportant in medical ultrasonic image, but the frequency of probe defects are often. Therefore practical tools for probe based ultrasonic QA should be developed. Advanced research on the effects of the probe defects on the quality of ultrasonic images is required. This study has investigated the effects of the defects in the probe elements influence Doppler images in the medical ultrasonic scanners. Especially the defects in a set of adjacent elements(SAE) electrically disconnected influence Doppler images were tested.
The results show Doppler brightness and velocity became rapidly reduced as the defected elements is located centrally, as the defected elements is activated. The more the defected elements increased, the more Doppler brightness and velocity increased. As a set of the element disconnected moved, it appeared Doppler velocity starting to decrease and then was followed by brightness. The strength is not consistent with the velocity in the number and location of the defected elements. The defects in the probe elements influence Doppler velocity when the defected elements got out of the elements activated at Doppler mode.
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KEYWORD
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Ultrasonic QA, SAE, Defected elements, Doppler image
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