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2022 Fiscal Year Final Research Report

Development of a new method of ultrasound device that medical staffs can measure the degree of leg edema easily.

Research Project

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Project/Area Number 20H03964
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 58050:Fundamental of nursing-related
Research InstitutionThe University of Shiga Prefecture

Principal Investigator

KOSHIYAMA MASAFUMI  滋賀県立大学, 人間看護学部, 教授 (50724390)

Co-Investigator(Kenkyū-buntansha) 坂本 眞一  滋賀県立大学, 工学部, 准教授 (40449509)
渡邊 友美子  滋賀県立大学, 人間看護学部, 講師 (50647162)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsピクセル / グレースケール / 携帯型超音波診断装置 / 画像解析ソフト / 下肢浮腫 / 浮腫グレード / ヒストグラム / フォトショップ
Outline of Final Research Achievements

The purpose of this study was to find new indices of the grade of leg skin, to study whether or not analyses of the subcutaneous layer of leg skin on ultrasound images using image-editing software program can be used to evaluate it and to digitize it. Images of 282 subcutaneous layers of leg skin in 141 pregnant women were obtained using a B-scan portable ultrasound device. Rectangular photographs (vertical: skin thickness; horizontal:
width of probe) were obtained using an image-editing program, and the luminous intensity (pixel grayscale: 0-255) were calculated using a histogram. There was strong positive correlation between the grade of pitting edema and both the total number of pixels in a rectangle × the average luminous intensity value and the total number of pixels in a rectangle × the standard deviation of the average luminous intensity value (ρ = 0.58 and ρ = 0.59, p < 0.0001, respectively). We could quantitatively evaluate the grade of leg edema by new methods.

Free Research Field

臨床婦人科学・産科学

Academic Significance and Societal Importance of the Research Achievements

現在、臨床の場において下肢浮腫の定性・定量診断は指による圧痕法が主体で、診断者によって結果にバラツキが認められる傾向にある。今回、下肢浮腫の程度を誰が行っても一定で、かつ客観的により正確に測定できる方法を考案した。下肢の皮膚を携帯型超音波診断装置にて撮像して、画像解析ソフトに入力するだけで、浮腫の有無と浮腫の程度を同時に算出できる方法である。現在は、photshopのっ入ったノートパソコンに画像を取り込んで、グレースケールのヒストグラムを描出して下肢浮腫指標を算出するという工程を踏むが、将来的には下肢皮膚の画像を取り込むだけで、連続自動計算するシステムを作成することも夢ではない。

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Published: 2024-01-30  

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