Image Processing Reference
In-Depth Information
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100
0
(a)
(b)
900
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100
0
4
3
2
1
p.p.m.
0
−
1
4
3
2
1
0
−
1
p.p.m.
(c)
(d)
FIGURE 12.2
Effects of different time-domain preprocessing on the absorption-mode
spectrum. (a) Original spectrum, (b) increased SNR by line broadening, (c) Lorentz-Gauss
transformation, and (d) removal of broadband components.
1000
900
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500
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300
200
100
0
Cr
NAA
Cho
NAA1
Gln
MI
Tau
4
3.5
3
2.5
2
1.5
p.p.m.
FIGURE 12.3
H MRS spectrum (bold line). Decomposition obtained
by LPSVD method. The contributions of small metabolite (myo-Inosytol [mI], taurine
[Tau], or Glutamate
Simulated TE20
1
glutamine [Gln]), which were not clearly evident on the original
spectrum, were identified and separated by the LPSVD methods.
+
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