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Power Doppler signal calibration in the finger joint between two models of ultrasound machine: a pilot study using a phantom and joints in patients with rheumatoid arthritis

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/71591

Title: Power Doppler signal calibration in the finger joint between two models of ultrasound machine: a pilot study using a phantom and joints in patients with rheumatoid arthritis
Authors: Sakano, Ryosuke Browse this author
Saito, Katsumi Browse this author
Kamishima, Tamotsu Browse this author →KAKEN DB
Nishida, Mutsumi Browse this author →KAKEN DB
Horie, Tatsunori Browse this author
Noguchi, Atsushi Browse this author
Kono, Michihito Browse this author
Sutherland, Kenneth Browse this author →KAKEN DB
Atsumi, Tatsuya Browse this author →KAKEN DB
Keywords: Power Doppler
signal calibration
finger joint
phantom
rheumatoid arthritis
Issue Date: 1-Oct-2017
Publisher: SAGE Publications
Journal Title: Acta radiologica
Volume: 58
Issue: 10
Start Page: 1238
End Page: 1244
Publisher DOI: 10.1177/0284185116685923
PMID: 28084811
Abstract: Background: Despite the advantages of ultrasound (US) in the management of rheumatoid arthritis (RA) patients, power Doppler (PD) US may be highly dependent on the type of US machine used. Purpose: To present a method to calibrate the PD signal of two models of US machines by use of a flow phantom and finger joints of patients with RA. Material and Methods: For the phantom study, the PD signal count was measured in the flow phantom perfusing blood mimicking fluid at various injection rates and pulse repetition frequencies (PRFs). The quantitative PD index was calculated with ImageJ. For the clinical study, the second and third metacarpophalangeal joints of five consecutive patients with RA were examined. The quantitative PD index was measured at various PRFs by use of two models of machine (the same models as the phantom study). Results: For the phantom and clinical studies, negative correlations were found between the PRF and the quantitative PD index when the flow velocity was constant and positive correlations between flow velocity and the quantitative PD index at constant PRF. There was a significant difference in the depiction performance of synovial blood flow between the two models, which can be calibrated by adjusting the PRF values derived from the phantom study in each model. Conclusion: Signal calibration of pannus vascularity between US machines may be possible by adjusting the PRF value according to flow phantom data. Different US machines can thus provide equivalent examination results concerning the pannus vascularity.
Rights: Sakano, Ryosuke; Saito, Katsumi; Kamishima, Tamotsu; Nishida, Mutsumi; Horie, Tatsunori; Noguchi, Atsushi; Kono, Michihito; Sutherland, Kenneth; Atsumi, Tatsuya; Power Doppler signal calibration in the finger joint between two models of ultrasound machine: a pilot study using a phantom and joints in patients with rheumatoid arthritis, Acta radiologica (Volume 58 Isssue 10) pp.1238-1244. Copyright © 2017. Reprinted by permission of SAGE Publications.
Type: article (author version)
URI: http://hdl.handle.net/2115/71591
Appears in Collections:保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 神島 保

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