Keita Suzuki    Department   Kawasaki University of Medical Welfare  ,    Position   Instructor
Article types	原著
Language	English
Peer review	Peer reviewed
Title	Influence of the ultrasound transducer tilt on muscle thickness and echo intensity of the rectus femoris muscle of healthy subjects.
Journal	Formal name：Journal of physical therapy science Abbreviation：J Phys Ther Sci ISSN code：09155287/09155287
Domestic / Foregin	Foregin
Volume, Issue, Page	29(12),pp.2190-2193
Author and coauthor	Hiroshi Ishida, Tadanobu Suehiro, Keita Suzuki, Tsuyoshi Yoneda, Susumu Watanabe
Publication date	2017/12
Summary	[Purpose] This study aimed to assess the influence of ultrasound (US) transducer tilt on muscle thickness and echo intensity of the rectus femoris muscle (RF) in healthy subjects. [Subjects and Methods] Fourteen healthy male subjects (20.8 ± 0.8 years) participated in this study. Transducer tilt was measured during US, with a digital angle gauge. Muscle thickness and echo intensity were measured in 4 transducer tilt conditions: reference angle; +3°; +6°; and +9° cranial from the reference angle. [Results] All differences in transducer tilt relative to the reference condition were larger than the minimal detectable change (MDC) of the reference condition. All differences in muscle thickness relative to the reference condition were not larger than the MDC of the reference condition. All differences in the echo intensity relative to the reference condition, except between the reference and the +3° condition, were larger than the MDC of the reference condition. [Conclusion] Our results indicated that an examiner should maintain a precise transducer tilt during repeated US measurements to quantify the minimal change in the echo intensity of the RF.
DOI	10.1589/jpts.29.190
PMID	29643602