Establishing Cutoff Values for a Quality Assurance Test Using an Ultrasound Phantom in Screening Ultrasound Examinations for Hepatocellular Carcinoma An Initial Report of a Nationwide Survey in Korea
- Title
- Establishing Cutoff Values for a Quality Assurance Test Using an Ultrasound Phantom in Screening Ultrasound Examinations for Hepatocellular Carcinoma An Initial Report of a Nationwide Survey in Korea
- Author
- 정우경
- Keywords
- hepatocellular carcinoma; phantom; quality assurance; ultrasound
- Issue Date
- 2011-09
- Publisher
- AMER INST ULTRASOUND MEDICINE, SUBSCRIPTION DEPT, 14750 SWEITZER LANE, STE 100, LAUREL, MD 20707-5906 USA
- Citation
- JOURNAL OF ULTRASOUND IN MEDICINE, Vol.30, No.9 [2011], p1221-1229
- Abstract
- Objectives-The purpose of this study was to evaluate the results of ultrasound (US) device testing using a US phantom and to determine cutoff values for phantom quality assurance tests in US examinations for the screening of hepatocellular carcinoma in Korea.Methods-Ultrasound phantom images were acquired from the general hospitals in Korea that participated in the National Cancer Screening Program for hepatocellular carcinoma. Ultrasound images of the phantom were acquired with a 3.0- to 5.0-MHz convex transducer and evaluated in terms of the dead zone, vertical and horizontal measurement, axial and lateral resolution, sensitivity, and gray scale/dynamic range. Appropriate cutoff values were determined to guarantee minimal qualifications for the performance of the US scanners.Results-Three hundred fifty-seven US scanners were tested using the following cutoff values: less than 2 mm for the dead zone, 5% discrepancy in the vertical measurement, 7.5% discrepancy in the horizontal measurement, all I 1 identifiable line targets for axial and lateral resolution, more than 14 cm for sensitivity, and more than 4 cylindrical structures for gray scale/dynamic range. With these criteria, 283 US scanners (79.3%) passed the tests. The most common cause of disqualification was the dynamic range/gray scale. No statistical difference was observed in the disqualification rate between 3 groups based on different years of manufacture.Conclusions-Through this study, we have defined cutoff values for phantom images acquired with US scanners. These will be used in performing screening US examinations for hepatocellular carcinoma in Korea.
- URI
- https://onlinelibrary.wiley.com/doi/abs/10.7863/jum.2011.30.9.1221http://hdl.handle.net/20.500.11754/37420
- ISSN
- 0278-4297
- DOI
- 10.7863/jum.2011.30.9.1221
- Appears in Collections:
- COLLEGE OF MEDICINE[S](의과대학) > MEDICINE(의학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML