Table 4 Fatty infiltration measurement outcomes for individual studies
Citation | Fat Infiltration Qualitative/Quantitative Classification system | Divided into compartments Yes/No |
|---|---|---|
Agten et al., 2017 [68] | Qualitative G | N |
Belzunce et al., 2020 [53] | Quantitative Ratio of muscle and fat value pixels | N |
Belzunce et al., 2021 [91] | Quantitative Ratio of muscle and fat value pixels | N |
Berber et al., 2015 [122] | Qualitative similar to G | N |
Bravo et al., 2013 [90] | Quantitative Skeletal muscle lipid concentration (g /100 mL) | N |
Bremer et al., 2011 [93] | Qualitative Similar to G | Y Gmed & Gmin: AMP |
Burian et al., 2020 [54] | Quantitative Using a water-fat separation algorithm | N |
Chi et al., 2015 [72] | Qualitative G | N |
Cowan et al., 2019 [19] | Qualitative G | Y Gmed & Gmin: AP |
De Anta-Diaz et al., 2016 [94] | Qualitative Grade 1: no fat or mild atrophy Grade 2: moderate or severe fatty atrophy | N |
Ebert et al., 2019 [71] | Qualitative G | Y Gmed & Gmin: AMP |
Engelken et al., 2014 [42] | Qualitative G & Q | N |
Kawasaki et al., 2017 [75] | Qualitative Q | N |
Kheterpal et al., 2020 [44] | Qualitative G & Q | N |
Kim et al., 2014 [74] | Qualitative Similar to G | N |
Kivle et al., 2018 [67] | Qualitative G | Y Gmed & Gmin: AMP |
Klemt et al., 2021 [120] | Qualitative G & Q & Bal and Lowe classification | N |
Koch et al., 2021 [26] | Quantitative Pixel intensity values from the fat only images and the water only images Muscle fat index = fat/(fat + water) | Y Gmed: AMP Gmin: AP |
Kovalak et al., 2018 | Qualitative G | N |
Makridis et al., 2014 [127] | Qualitative G | N |
Marcon et al., 2016 [89] | Quantitative Fat Signal Fraction % = 100 × fat /(water + fat) | N |
Muller et al., 2010 [56] | Qualitative G | Y Gmin: AMP |
Muller et al., 2011a[58] | Qualitative G | Y Gmed & Gmin: AMP |
Muller et al., 2011b [57] | Qualitative G | Y Gmed & Gmin: AMP |
Peiris et al., 2020 [46] | Qualitative Grade 0: no fat infiltration grade 1: 1–10% fat infiltration grade 2: 11–50% fat infiltration grade 3: > 50% fat infiltration | N |
Pfirrmann et l., 2005 [69] | Qualitative G | Y Gmed & Gmin: AMP |
Ruckenstuhl et al., 2020 [49] | Qualitative G | N |
Rykov et al., 2021 [92] | Qualitative G | N |
Sutter et al., 2013 [85] | Qualitative G | N |
Takada et al., 2018 [80] | Qualitative G | N |
Takada et al., 2021 [81] | Qualitative G | N |
Thaunat et al., 2018 [96] | Qualitative G | Y Gmed: AMP |
Tran et al., 2021 [121] | Quantitative Intramuscular lipid concentration | N |
Unis et al., 2013 [87] | Qualitative Presence/absence | N |
Vasarhelyi et al., 2020 [48] | Quantitative Muscle/fat intensity scores | N |
von Roth et al., 2014 [60] | Quantitative % fat content: “…the quotient of the number of fat-value-pixels and the number of fat-value-pixels added to the number of muscle-value pixels.” | Y Gmed: AMP |
Winkler et al., 2018 [61] | Quantitative % fat content = ratio of pixels of fat-value and muscle value pixels | N |
Zacharias et al., 2016 [22] Zacharias et al., 2018 [21] | Qualitative G | N |
Zhao et al., 2020 [47] | Qualitative G | N |