title: Changes to Muscle T₂after Single-finger Exercise Measured with 0.2T MR Imaging.
abstract: We constructed an arm holder for muscle exercise from a forearm-shaped plastic shell and magnetic resonance (MR) imaging position markers and determined the echo time (39 ms) for T₂-weighted spin-echo MR imaging from T₂values of the exercised (50 ms) and resting (32 ms) muscle at 0.2 tesla. The smallest detectable muscle was the extensor digiti minimi muscle (cross-sectional area 25 mm²). This combination could be useful to monitor finger exercise in patients undergoing physical therapy.
authors.affiliation: Department of Regulatory Physiology, Dokkyo Medical University School of Medicine.
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Takamori
authors.forename: Sumikazu
authors.initials: S
authors.lastname: Akiyama
authors.forename: Kazuya
authors.initials: K
authors.lastname: Yoshida
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Imaizumi-Ohashi
authors.forename: Mika
authors.initials: M
authors.lastname: Yokoi-Hayakawa
authors.forename: Fumie
authors.initials: F
authors.lastname: Yamazaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ootsuka
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Haishi
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Seo
mesh_terms: D000328:Adult; D019412:Anatomy, Cross-Sectional / Q000379:methods; D015444:Exercise / Q000502:physiology*; D005260:Female; D005385:Fingers / Q000502:physiology*; D005542:Forearm / Q000502:physiology; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008662:Metacarpophalangeal Joint / Q000502:physiology; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology; D009126:Muscle Relaxation / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology*; D014955:Wrist Joint / Q000502:physiology; D055815:Young Adult