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Table 4 Descriptive statistics of repeatedly scanned patient brain volumes.

From: Parallel imaging: is GRAPPA a useful acquisition tool for MR imaging intended for volumetric brain analysis?

    BET/Sienax BMAP/Volstat
iPAT scan   BPF GM WM CSF BPF GM WM CSF
2 1 Mean 72.9% 662 504 432 73.5% 657 417 386
2 2 Mean 73.2% 664 507 427 73.6% 656 419 385
4 1 Mean 73.2% 596 564 425 75.5% 670 448 361
4 2 Mean 73.0% 596 562 428 75.4% 670 444 363
2 1 SD 3.8% 77 61 57 2.7% 71 53 45
2 2 SD 4.2% 78 54 69 3.0% 71 50 55
4 1 SD 4.1% 62 62 72 2.8% 60 50 55
4 2 SD 3.9% 61 57 70 2.9% 59 51 56
2 1 CoV 0.5% 11.6% 12.0% 13.2% 0.4% 10.6% 11.2% 15.1%
2 2 CoV 0.6% 11.7% 10.8% 16.1% 0.4% 10.5% 11.7% 12.5%
4 1 CoV 0.6% 10.4% 10.9% 16.9% 0.4% 9.2% 11.9% 14.3%
4 2 CoV 0.5% 10.2% 10.2% 16.3% 0.4% 9.0% 12.1% 14.6%
  1. Data of 15 patient images are included in the acceleration factor two comparison and of 13 patients in the acceleration factor four comparison. Volumes were measured using the BET and Sienax algorithms of FSL in addition to the BMAP/Volstat in-house software. Volumes are measured in cm3 with the exception of BPF, which is unitless.