Power Doppler signal calibration between ultrasound machines by use of a capillary-flow phantom for pannus vascularity in rheumatoid finger joints

2014 Fiscal Year Final Research Report

• Project/Area Number: 24591437
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: 膠原病・アレルギー・感染症内科学
• Research Institution: Hokkaido University
• Principal Investigator: KAMISHIMA Tamotsu 北海道大学, 保健科学研究院, 教授 (10399868)
• Co-Investigator(Kenkyū-buntansha): ATSUMI Tatsuya 北海道大学, 大学院医学研究科, 教授 (20301905) ; TERAE Satoshi 北海道大学, 大学院医学研究科, 准教授 (40240634) ; NISHIDA Mutsumi 北海道大学病院, 検査輸血部, 副技師長 (90404722)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 関節超音波

Outline of Final Research Achievements

Ultrasound allows the detection and grading of inflammation in rheumatology. Despite these advantages of ultrasound in the management of rheumatoid patients, it is well known that there are significant machine-to-machine disagreements regarding signal quantification. In this study, we tried to calibrate the power Doppler (PD) signal of two models of ultrasound machines by using a capillary-flow phantom. In Aplio 500 and Avius, we found negative correlations between the PRF and the QPD index when the flow velocity was constant, and a positive correlation between flow velocity and the QPD index at constant PRF. The equation for the relationship of the PRF between Aplio 500 and Avius was: y = 0.023x + 0.36 [y = PRF of Avius (kHz), x = PRF of Aplio 500 (kHz)]. Our results suggested that the signal calibration of various models of ultrasound machines is possible by adjustment of the PRF setting.

Free Research Field

画像診断学