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J Korean Radiol Soc. 2008 May;58(5):533-541. Korean. Original Article. https://doi.org/10.3348/jkrs.2008.58.5.533
Kim PN , Lim JW , Kim HC , Yoon YC , Sung DJ , Moon MH , Kim JS , Kim JC .
Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Korea. pnkim@amc.seoul.kr
Department of Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Korea.
Department of Radiology, East-west Neo Medical Center, College of Medicine, Kyung Hee University, Korea.
Department of Radiology, Sam Sung Seoul Hospital, Sung Kyunkwan University, Korea.
Department of Radiology, College of Medicine, Korea University, Korea.
Department of Radiology, College of Medicine, Kwandong University, Korea.
Department of Radiology, Dongguk University International Hospital, Korea.
Korea Industry & Technology Research Institute, Korea.
Abstract

PURPOSE: To determine the rate of congruence and to standardize assessment of US (ultrasound) phantom images with the use of an ATS-539 multipurpose phantom for US equipment currently utilized in Korea MATERIALS AND METHODS: US phantom images were scanned with a 3.0-5.0 MHz convex transducer and were digitized by use of an analogue-digital converter. Members of a committee with consent evaluated the US phantom images from 108 types of ultrasound equipment. The dead zone, vertical and horizontal measurement, axial/lateral resolution, focal zone, sensitivity, functional resolution and gray scale/dynamic range were evaluated. Congruence or incongruence of ultrasound equipment was determined based on the results of dead zone, axial/lateral resolution and gray scale/dynamic range measurements. Other factors were evaluated for the possibility as criteria with the use of the Mann-Whitney U test and receiver operator characteristic (ROC) curve analysis. RESULTS: The dead zone, axial/lateral resolution and gray scale/dynamic range were 91.7%, 94.4% and 76.9%, respectively, for suitable US equipment. Considering all three factors, 78 types of ultrasound equipment were passed. The congruence rate of focal zone and functional resolution were 62.4% and 69.3% of the US equipment, respectively. CONCLUSION: Of the US equipment, 72.2% of the equipment was acceptable based on the dead zone, axial/lateral resolution, and gray scale/dynamic range measurements as determined with the use of an ATS-539 phantom. Focal zone and 8 mm-functional resolution can be useful as a standard in the assessment of a US phantom image.

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