Digital Signal Processing Reference
In-Depth Information
MULTIPLETS in MRS : PADE SHAPE SPECTRA with PARTIAL SIGNAL LENGTH N
P
= 800 (COMPONENTS: TOP, TOTAL: BOTTOM)
SPECTRAL CROWDING and OVERLAPS : FREQUENCY BANDS with FOCUS ON DOUBLETS and TRIPLETS
Absorption Component Shape Spectra : Malignant Prostate Tissue
700
ν
L
= 500 MHz
PADE : FPT
(−)
600
B
0
≈
11.7 T
K = 400, N
P
= 800
CONVERGED
500
400
300
200
100
0
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
2.4
(i) Chemical shift (ppm)
Absorption Total Shape Spectrum : Malignant Prostate Tissue
700
ν
L
= 500 MHz
PADE : FPT
(−)
600
B
0
11.7 T
≈
K = 400, N
P
= 800
CONVERGED
500
400
300
200
100
0
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
2.4
(ii) Chemical shift (ppm)
FIGURE 11.9
Converged Pade absorption component shape spectra (panel (i)) and con
verged absorption total shape spectra (panel (ii)) for malignant prostate using
in vitro MRS data derived from Ref. [443].
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