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- W2002187071 abstract "Abstract Skeletal muscle contains intramyocellular lipid droplets within the cytoplasm of myocytes as well as intermuscular adipocytes. These depots exhibit physiological and pathological variation which has been revealed with the advent of diagnostic imaging approaches: magnetic resonance ( MR ) imaging, MR spectroscopy and computed tomography ( CT ). CT uses computer‐processed X‐rays and is now being applied in muscle physiology research. The purpose of this review is to present CT methodologies and summarize factors that influence muscle radiation attenuation, a parameter which is inversely related to muscle fat content. Pre‐defined radiation attenuation ranges are used to demarcate intermuscular adipose tissue [from −190 to −30 H ounsfield units ( HU )] and muscle (−29 HU to +150 HU ). Within the latter range, the mean muscle radiation attenuation [muscle ( radio ) density] is reported. Inconsistent criteria for the upper and lower HU cut‐offs used to characterize muscle attenuation limit comparisons between investigations. This area of research would benefit from standardized criteria for reporting muscle attenuation. Available evidence suggests that muscle attenuation is plastic with physiological variation induced by the process of ageing, as well as by aerobic training, which probably reflects accumulation of lipids to fuel aerobic work. Pathological variation in muscle attenuation reflects excess fat deposition in the tissue and is observed in people with obesity, diabetes type II , myositis, osteoarthritis, spinal stenosis and cancer. A poor prognosis and different types of morbidity are predicted by the presence of reduced mean muscle attenuation values in patients with these conditions; however, the biological features of muscle with these characteristics require further investigation." @default.
- W2002187071 created "2016-06-24" @default.
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- W2002187071 date "2014-02-06" @default.
- W2002187071 modified "2023-10-16" @default.
- W2002187071 title "Measurement of skeletal muscle radiation attenuation and basis of its biological variation" @default.
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- W2002187071 doi "https://doi.org/10.1111/apha.12224" @default.
- W2002187071 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4309522" @default.
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