Upload
phoebe-bonner
View
44
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Choline/NAA Spatial Variation. Lars Ewell Radiation Oncology University of Arizona Medical Center. 1/25/08. Cho/NAA Spatial Variation. Cho/NAA has potential for necrosis/disease discrimination. Weybright et al., Neuroradiology (2004) 46: 541–549. Patient 1: Scanned 3/23/07. S26. S46. - PowerPoint PPT Presentation
Citation preview
Choline/NAA Spatial Variation
Lars Ewell
Radiation Oncology University of Arizona Medical Center
1/25/08
1
Cho/NAA Spatial VariationMetabolite Ratios for Different Tissue
0
0.51
1.5
2
2.53
3.5
44.5
5
1 2 3
Ratio
Cho/Cr
Cho/NAA
NAA/Cr
RadiationInduced Necrosis
WhiteMatter
RecurrentTumor
Cho/NAA has potential for necrosis/disease discrimination
Weybright et al., Neuroradiology (2004) 46: 541–549
Patient 1: Scanned 3/23/07
S26 S46
Patient 1, Cho/NAA 3/23/07
• Highest ratio near center of disease/radiation.
• Dark blue not zero, ambiguous, indeterminate spectra.
Patient 1, Cho/NAA 5/8/07
• Highest ratio moved posterior relative to 3/23/07 spectra.
• Dark blue not zero, ambiguous, indeterminate spectra.
Patient 1: Row and Columns1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Cho/NAA Ratio: Spatial Variation - Row 11
0.00
0.20
0.40
0.60
0.80
1.00
0.00 1.00 2.00 3.00
Dist. from Inferior Slice (cm )
Cho
/NA
ACho/NAA Column 5
Cho/NAA Column 11
Cho/NAA Column 6
Cho/NAA Column 7
Cho/NAA Column 8
Cho/NAA Column 9
Cho/NAA Column 10
• Central Increase going from Inferior to Superior Slice: Columns 6, 7, 8
•Peripheral Decrease going from Inferior to Superior Slice: Columns 5, 10, 11
• Similar behavior for row number 12
Cho/NAA Ratio: Spatial Variation - Row 12
0.00
0.20
0.40
0.60
0.80
1.00
0.00 1.00 2.00 3.00
Dist. from Inferior Slice (cm )
Cho/
NAA
Cho/NAA Column 5
Cho/NAA Column 11
Cho/NAA Column 7
Cho/NAA Column 8
Cho/NAA Column 9
Cho/NAA Column 10
• Closer to lesion, different behavior Cho/NAA Ratio: Spatial Variation - Row 7
0.00
0.20
0.40
0.60
0.80
1.00
0.00 1.00 2.00 3.00
Dist. from Inferior Slice (cm )
Cho/
NAA
Cho/NAA Column 5
Cho/NAA Column11
Cho/NAA Column 6