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Table 2 Mean ICC and SEm values for US and MRI

From: Validity of ultrasound imaging for intrinsic foot muscle cross-sectional area measurements demonstrated by strong agreement with MRI

Muscle US - ICC3,1
(95% CI)
MRI - ICC3,1
(95% CI)
US - SEm
(95% CI)
MRI - SEm
(95% CI)
Right foot
 FHB 0.994
(0.989, 0.997)
0.998
(0.995, 0.999)
0.028
(1.35, 1.46)
0.020
(1.37, 1.43)
 ABDH 0.997
(0.994, 0.998)
0.998
(0.995, 0.999)
0.031
(2.41, 2.53)
0.023
(2.49, 2.58)
 FDB 0.993
(0.985, 0.996)
0.998
(0.997, 0.999)
0.044
(2.2, 2.37)
0.023
(2.31, 2.4)
 QP 0.997
(0.995, 0.999)
0.999
(0.997, 0.999)
0.032
(1.86, 1.98)
0.019
(1.86, 1.94)
 ADM 0.994
(0.989, 0.997)
0.997
(0.994, 0.998)
0.029
(1.22, 1.33)
0.020
(1.23, 1.31
Left foot
 FHB 0.991
(0.982, 0.995)
0.997
(0.995, 0.999)
0.032
(1.29, 1.42)
0.020
(1.34, 1.41)
 ABDH 0.996
(0.991, 0.998)
0.999
(0.998, 0.999)
0.038
(2.38, 2.53)
0.012
(2.47, 2.54)
 FDB 0.996
(0.993, 0.998)
0.999
(0.997, 0.999)
0.035
(2.2, 2.33)
0.017
(2.28, 2.35)
 QP 0.996
(0.993, 0.998)
0.999
(0.998, 1.00)
0.037
(1.84, 1.99)
0.020
(1.87, 1.95)
 ADM 0.994
(0.989, 0.997)
0.997
(0.993, 0.998)
0.026
(1.24, 1.34)
0.018
(1.25, 1.32)
  1. All values reported in cm2. ICC intraclass correlation coefficients, SEm standard error of the measurement, FHB flexor hallucis brevis, ABDH abductor hallucis, FDB flexor digitorum brevis, QP quadratus plantae, ADM abductor digiti minimi