Table 1 Mean and standard deviation of B0-maps, MRSI spectral linewidth (FWHM), signal-to-noise ratio (SNR), and goodness of fit measure by Cramer-Rao lower bounds (CRLB of tCr) metric, contrast-to-noise ratio (CNR of 2HG), the percentage of voxels with acceptable quality (i.e. FWHM < 0.1 ppm, CRLB < 20%, SNR > 10).

From: An integrated RF-receive/B0-shim array coil boosts performance of whole-brain MR spectroscopic imaging at 7 T

 

ΔB0 (Hz)

FWHM (ppm)

SNR

CRLB (%)

CNR

Voxels (%)

*2SHbox

26.17 ± 1.56

0.071 ± 0.032

21.64 ± 6.95

10.47 ± 15.43

0.58

78.38 ± 7.39

#2SHbrain

21.40 ± 1.29

0.069 ± 0.033

22.35 ± 6.08

10.12 ± 15.34

0.28

84.45 ± 4.60

*2SHbox + AC/DCbrain

14.24 ± 3.03

0.053 ± 0.021

27.83 ± 7.72

8.85 ± 12.03

1.29

93.43 ± 5.36

#2SHbrain + AC/DCbrain

13.34 ± 2.00

0.059 ± 0.024

33.26 ± 5.65

8.54 ± 11.52

1.65

93.55 ± 0.64

§(2SHbrain + AC/DCbrain)joint

11.17

0.051 ± 0.023

28.38 ± 5.38

8.22 ± 11.99

NA

95

  1. The CNR was calculated for tumor 2HG in the mutant IDH1 patient (NA not acquired).
  2. *This shim was measured in four subjects.
  3. #This shim was measured in two subjects.
  4. §This shim was measured in one subject.
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