Table 1 The mean and SD of multi-parametric MRI parameters for the femoral and tibial subchondral bone marrow.

From: Knee subchondral bone perfusion and its relationship to marrow fat and trabeculation on multi-parametric MRI and micro-CT in experimental CKD

			Week 0	Week 8	Week 12	Week 16	Week 24	Week 30	Week 36	Week 44
			Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD
Control	Femoral	A	0.543 ± 0.054	0.543 ± 0.057	0.537 ± 0.054	0.504 ± 0.082	0.529 ± 0.069	0.527 ± 0.073	0.499 ± 0.062	0.474 ± 0.057
		k _el	0.436 ± 0.027	0.432 ± 0.020	0.434 ± 0.019	0.437 ± 0.017	0.429 ± 0.025	0.422 ± 0.038	0.397 ± 0.033	0.398 ± 0.037
		k _ep	7.425 ± 0.591	7.627 ± 0.470	7.810 ± 0.474	7.737 ± 0.550	7.945 ± 0.617	8.168 ± 0.326	7.913 ± 0.873	7.795 ± 0.417
		FF	0.134 ± 0.056	0.484 ± 0.077	0.528 ± 0.039	0.534 ± 0.046	0.532 ± 0.046	0.553 ± 0.060	0.619 ± 0.075	0.575 ± 0.091
		WF	0.866 ± 0.055	0.516 ± 0.035	0.472 ± 0.081	0.466 ± 0.046	0.468 ± 0.064	0.447 ± 0.083	0.381 ± 0.058	0.425 ± 0.091
		T2*	11.05 ± 1.122	11.53 ± 1.361	11.88 ± 1.008	11.47 ± 1.101	11.20 ± 1.018	11.93 ± 1.643	11.75 ± 1.492	12.88 ± 1.639
	Tibial	A	0.465 ± 0.084	0.467 ± 0.074	0.434 ± 0.063	0.421 ± 0.082	0.435 ± 0.053	0.424 ± 0.083	0.441 ± 0.090	0.380 ± 0.061
		k _el	0.420 ± 0.021	0.423 ± 0.042	0.418 ± 0.030	0.420 ± 0.021	0.420 ± 0.025	0.411 ± 0.026	0.392 ± 0.036	0.379 ± 0.048
		k _ep	7.493 ± 0.970	7.580 ± 0.983	7.743 ± 0.871	7.950 ± 0.547	7.952 ± 0.548	7.948 ± 0.544	7.810 ± 0.699	7.903 ± 0.393
		FF	0.127 ± 0.056	0.421 ± 0.142	0.492 ± 0.099	0.492 ± 0.084	0.493 ± 0.126	0.546 ± 0.110	0.519 ± 0.074	0.562 ± 0.060
		WF	0.873 ± 0.044	0.579 ± 0.071	0.508 ± 0.084	0.508 ± 0.091	0.507 ± 0.081	0.454 ± 0.046	0.481 ± 0.080	0.438 ± 0.081
		T2*	10.88 ± 1.338	10.56 ± 1.337	10.94 ± 0.572	10.54 ± 1.148	11.69 ± 1.089	11.45 ± 0.862	11.69 ± 1.741	12.29 ± 1.029
CKD	Femoral	A	0.701 ± 0.073	0.515 ± 0.041	0.430 ± 0.064	0.397 ± 0.086	0.347 ± 0.074	0.333 ± 0.085	0.344 ± 0.069	0.261 ± 0.087
		k _el	0.429 ± 0.046	0.416 ± 0.035	0.383 ± 0.039	0.374 ± 0.036	0.359 ± 0.034	0.362 ± 0.026	0.333 ± 0.024	0.296 ± 0.038
		k _ep	7.698 ± 0.470	7.658 ± 0.796	8.038 ± 0.742	8.173 ± 0.547	8.200 ± 0.518	7.707 ± 0.486	9.152 ± 0.476	9.587 ± 1.081
		FF	0.109 ± 0.068	0.379 ± 0.081	0.341 ± 0.122	0.359 ± 0.086	0.355 ± 0.074	0.344 ± 0.093	0.297 ± 0.092	0.275 ± 0.086
		WF	0.891 ± 0.045	0.621 ± 0.129	0.659 ± 0.086	0.641 ± 0.085	0.645 ± 0.091	0.656 ± 0.075	0.703 ± 0.075	0.725 ± 0.060
		T2*	11.41 ± 1.185	11.16 ± 0.892	12.35 ± 1.013	13.51 ± 1.299	15.76 ± 1.802	16.39 ± 2.093	16.31 ± 1.896	16.68 ± 1.386
	Tibial	A	0.618 ± 0.077	0.429 ± 0.035	0.295 ± 0.082	0.264 ± 0.072	0.252 ± 0.066	0.276 ± 0.064	0.274 ± 0.045	0.204 ± 0.072
		k _el	0.428 ± 0.033	0.402 ± 0.022	0.381 ± 0.031	0.380 ± 0.020	0.346 ± 0.040	0.345 ± 0.035	0.317 ± 0.036	0.290 ± 0.057
		k _ep	7.442 ± 0.821	7.775 ± 0.441	8.005 ± 0.898	8.018 ± 1.009	8.280 ± 0.965	8.485 ± 0.966	8.882 ± 0.883	9.417 ± 0.865
		FF	0.104 ± 0.062	0.297 ± 0.077	0.329 ± 0.084	0.324 ± 0.085	0.315 ± 0.065	0.285 ± 0.053	0.266 ± 0.077	0.259 ± 0.087
		WF	0.896 ± 0.021	0.703 ± 0.129	0.671 ± 0.073	0.676 ± 0.116	0.685 ± 0.092	0.715 ± 0.109	0.734 ± 0.139	0.741 ± 0.136
		T2*	11.20 ± 1.359	11.15 ± 1.429	11.61 ± 1.402	13.48 ± 1.356	15.03 ± 1.578	15.12 ± 1.972	15.88 ± 1.933	16.01 ± 1.844

Abbreviations: A: amplitude; k _el: elimination constant; k _ep: permeability rate constant; FF: fat fraction; WF: water fraction; T2*: relaxation time.

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Table 1 The mean and SD of multi-parametric MRI parameters for the femoral and tibial subchondral bone marrow.

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