Choi Heung Ho

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The ultrasonic image diagnosis method is the one of the tests used to find diseases. The acoustic field characteristic analysis method is one of the ultrasonic probe's performance evaluations. In this paper, the quantitative acoustic field analysis method is suggested for quantitative probe evaluation. A medical ultrasonic probe which is decided abnormal in(More)
A rapid, sensitive, and convenient method is described for determining Lewisite oxide in soil. Samples are initially fortified with phenylarsine oxide (surrogate), then both species are extracted using ascorbic acid solutions containing 1,3-propanedithiol (derivatizing reagent). The corresponding filtered supernatant is sampled using a solid-phase(More)
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