Applications of multi-nuclear magnetic resonance spectroscopy at 7T

doi:10.4329/wjr.v3.i4.105

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Apr 28, 2011 (publication date) through Jul 27, 2024

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World Journal of Radiology

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1949-8470

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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World J Radiol. Apr 28, 2011; 3(4): 105-113
Published online Apr 28, 2011. doi: 10.4329/wjr.v3.i4.105

Table 1 Mean Cramer-Rao lower bounds (SD) from LCModel averaged across all subjects

	NAA	Glu	Gln	mI	GABA	Cr	Cho
7T short	2 (0)	2 (0)	6 (1)	5 (1)	9 (2)	3 (2)	2 (0)
3T short	3 (1)	8 (2)	24 (8)	6 (1)	24 (10)	12 (3)	7 (7)
7T long	2 (1)	8 (1)	28 (13)	10 (3)	26 (9)	2 (0)	2 (0)
3T long	3 (1)	16 (5)	40 (15)	13 (6)	50 (20)	12 (5)	5 (1)

NAA: N-acetyl aspartate; Glu: Glutamate; Gln: Glutamine; mI: Myo-Inositol; GABA: γ-aminobutyric acid; Cr: Creatine; Cho: Choline.

Table 2 Mean % coefficients of variation (SD) averaged across all subjects

	NAA	Glu	Gln	mI	GABA	Cr	Cho
Uncorrected
7T short	3 (2)	4 (2)	10 (6)	9 (3)	10 (6)	3 (2)	5 (4)
3T short	5 (3)	8 (6)	29 (11)	8 (4)	21 (14)	10 (4)	16 (16)
7T long	6 (6)	10 (6)	29 (19)	19 (10)	16 (8)	7 (6)	8 (6)
3T long	6 (6)	16 (9)	32 (30)	22 (10)	36 (25)	22 (13)	8 (7)
Tissue corrected
7T short	4 (3)	5 (2)	10 (5)	9 (4)	10 (6)	4 (2)	6 (3)
3T short	6 (4)	8 (6)	29 (12)	8 (5)	22 (15)	10 (5)	17 (16)
7T long	6 (6)	10 (7)	29 (19)	20 (10)	15 (6)	6 (6)	8 (6)
3T long	7 (6)	16 (10)	32 (30)	23 (10)	38 (25)	22 (14)	9 (7)

NAA: N-acetyl aspartate; Glu: Glutamate; Gln: Glutamine; mI: Myo-Inositol; GABA: γ-aminobutyric acid; Cr: Creatine; Cho: Choline.

Table 3 Mean Cramer-Rao lower bounds (SD) from LCModel averaged across all subjects

	NAA	Glu	Gln	mI	GABA	Cr	Cho
CRLB ACC	2 (0)	2 (0)	6 (1)	5 (1)	9 (2)	3 (2)	2 (0)
CRLB Ins	3 (1)	3 (1)	9 (3)	7 (1)	11 (3)	2 (0)	2 (1)

CRLB: Cramer-Rao lower bounds; ACC: Anterior cingulate cortex; NAA: N-acetyl aspartate; Glu: Glutamate; Gln: Glutamine; mI: Myo-Inositol; GABA: γ-aminobutyric acid; Cr: Creatine; Cho: Choline.

Table 4 Mean % coefficients of variation (SD) and % longitudinal variation (SD) averaged across all subjects

	NAA	Glu	Gln	mI	GABA	Cr	Cho
%CV
ACC	4 (3)	5 (2)	10 (5)	9 (4)	10 (6)	4 (2)	6 (3)
Ins	6 (6)	8 (6)	12 (9)	10 (6)	21 (11)	7 (7)	6 (4)
%LV
ACC	6 (3)	8 (7)	11 (9)	13 (13)	16 (13)	8 (9)	9 (10)
Ins	6 (5)	8 (10)	18 (18)	18 (11)	20 (24)	6 (6)	6 (6)

CV: Coefficients of variation; LV: Longitudinal variation; ACC: Anterior cingulate cortex; NAA: N-acetyl aspartate; Glu: Glutamate; Gln: Glutamine; mI: Myo-Inositol; GABA: γ-aminobutyric acid; Cr: Creatine; Cho: Choline.

Table 5 Mean (SD) metabolite levels (AU)

	NAA	Glu	Gln	mI	GABA	Cr	Cho
ACC	6.3 (0.7)	11.0 (1.4)	2.3 (0.4)	3.8 (0.3)	1.7 (0.4)	6.1 (0.6)	1.6 (0.2)
Ins	7.1 (0.6)	12.1 (1.3)	2.5 (0.5)	3.8 (0.5)	1.9 (0.4)	6.5 (0.4)	1.7 (0.2)

ACC: Anterior cingulate cortex; NAA: N-acetyl aspartate; Glu: Glutamate; Gln: Glutamine; mI: Myo-Inositol; GABA: γ-aminobutyric acid; Cr: Creatine; Cho: Choline.

Citation: Stephenson MC, Gunner F, Napolitano A, Greenhaff PL, MacDonald IA, Saeed N, Vennart W, Francis ST, Morris PG. Applications of multi-nuclear magnetic resonance spectroscopy at 7T. World J Radiol 2011; 3(4): 105-113
URL: https://www.wjgnet.com/1949-8470/full/v3/i4/105.htm
DOI: https://dx.doi.org/10.4329/wjr.v3.i4.105