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KMID : 1103720080580050533
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Journal of the Korean Society of Radiology
2008 Volume.58 No. 5 p.533 ~ p.541
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Quality Assessment of Ultrasonographic Equipment Using an ATS-539 Multipurpose Phantom
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Kim Pyo-Nyun
Lim Joo-Won
Kim Hyun-Cheol
Yoon Young-Cheol
Sung Deuk-Jae
Moon Min-Hwan
Kim Jung-Sook
Kim Jong-Chan
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Abstract
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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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KEYWORD
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Ultrasonography, Equipment, Phantom, Quality control, Quality assessment
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