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Fig. 1A. Transverse inversion recovery T2-weighted turbo spin-echo MR
images (TR/TE, 5032/30) obtained from 25-year-old male athlete with T2
hyperintensity in semitendinosus muscle show technique for determination of
extent of muscle injury. Measurements of maximal anteroposterior
(arrowheads) and transverse (arrows) dimensions of
intramuscular abnormality were combined with craniocaudal extent as determined
from slice position notation to estimate volume of muscle injury.