Repeatability quantification of brain diffusion-weighted imaging for future clinical implementation at a low-field MR-linac

Table 3 Summary of volunteer results

ROI	highRes				highSNR				Literature
ROI	Scan 1	Scan 2	RC	relRC	Scan 1	Scan 2	RC	relRC
Unit	10^–6 mm²/s	10^–6 mm²/s	10^–6 mm²/s	%	10^–6 mm²/s	10^–6 mm²/s	10^–6 mm²/s	%	10^–6 mm²/s
CSF	2264 ± 484	2258 ± 428	167 [117, 293]	7 [5, 12]	2868 ± 624	2878 ± 729	364 [254, 639]	12 [9, 22]	2730–3020
ROI_left	528 ± 104	532 ± 107	62 [43, 108]	12 [8, 20]	680 ± 82	676 ± 82	41 [28, 71]	6 [4, 10]	620–1090
ROI_right	518 ± 105	515 ± 106	66 [46, 116]	13 [9, 23]	673 ± 81	672 ± 80	46 [32, 80]	7 [5, 12]	620–1090
ROI_post	668 ± 144	686 ± 139	70 [49, 123]	11 [8, 19]	816 ± 117	822 ± 122	64 [45, 112]	8 [5, 14]	620–1090
ROI_ant	750 ± 123	748 ± 128	34 [24, 60]	5 [3, 8]	798 ± 92	804 ± 104	41 [29, 72]	5 [4, 9]	620–1090
All 4 cyl. ROIs			53 [44, 68]	9 [8, 12]			44 [36, 56]	6 [5, 7]

The ADCs (mean ± 1σ) within each ROI, averaged over all ten volunteers are reported for both sequence variants and scans, alongside literature values [38]. Additionally, the RC and relRC values with their respective 95% confidence intervals are reported for each ROI separately, and for all four cylindrical ROIs combined

ISSN: 1748-717X