Changes to Muscle T₂after Single-finger Exercise Measured with 0.2T MR Imaging

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 smal...

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Bibliographic Details
Published in:Magnetic resonance in medical sciences 2015, Vol.14 (4), p.359-366
Main Authors: Takamori, Masayoshi, Akiyama, Sumikazu, Yoshida, Kazuya, Imaizumi-Ohashi, Yoshie, Yokoi-Hayakawa, Mika, Yamazaki, Fumie, Ootsuka, Hiroshi, Haishi, Tomoyuki, Seo, Yoshiteru
Format: Article
Language:English
Subjects:
Adult
Anatomy, Cross-Sectional - methods
Exercise - physiology
Female
Fingers - physiology
Forearm - physiology
Humans
Image Enhancement - methods
Magnetic Resonance Imaging - instrumentation
Magnetic Resonance Imaging - methods
Male
Metacarpophalangeal Joint - physiology
Middle Aged
Muscle Contraction - physiology
Muscle Relaxation - physiology
Muscle, Skeletal - physiology
Wrist Joint - physiology
Young Adult
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Summary: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.
ISSN:1880-2206
DOI:10.2463/mrms.2014-0090