Using 1 MHz pulse-echo ultrasound externally applied to detect mastoid effusion: Cadaver experiments

Chin Kuo Chen, Yung Liang Wan, Po Hsiang Tsui, Wen Ta Chiu, Fang Jui

研究成果: 雜誌貢獻文章同行評審

3 引文 斯高帕斯(Scopus)


The objective of this study is to explore the feasibility of using ultrasound to detect mastoid effusion (ME). In the past, ultrasound has been used to measure middle ear effusion (MEE) by injecting water into the external ear canal to measure echoes from the tympanic membrane, which is uncomfortable for the patient. It has been shown that air cells in the mastoid of patients with MEE are filled with fluid, which implies that ME could be a useful indicator of MEE. This study suggests using ultrasound to detect ME as a potentially noninvasive approach for MEE detection. In vitro experiments were performed on ten cadaver samples of the human ear. A single-element 1 MHz transducer was used to measure the mastoid of each cadaver before and after injecting water into the mastoid. The experimental results showed that the relative amplitudes of ultrasonic signals differed significantly between before (0.24 ± 0.09, mean ± standard deviation) and after (0.15 ± 0.03) the water injection (p <0.05, t-test), demonstrating that the ultrasonic reflection can be used to detect ME. The location of the human mastoid under the skin behind the ear allows external measurements, and hence ultrasound-based ME detection may be an alternative, noninvasive diagnostic approach to detecting MEE in the future, providing an examination that avoids discomfort.

頁(從 - 到)663-667
出版狀態已發佈 - 7月 2012

ASJC Scopus subject areas

  • 聲學與超音波


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