Article Figures & Data
Figures
- fig 1.
A–G, Patient with a pineocytoma: six MR spectra (A–F) represent voxels outlined on the axial, contrast-enhanced T1-weighted MR image (G). Only voxels covering contrast-enhancing parts of the lesion showed pathologic MR spectra.
- fig 2.
←A–Q, Patient with a cystic high-grade glioma: the images show the heterogeneity of spectra across the lesion. A is an axial, contrast-enhanced T1-weighted MR image with the measurement area and voxels represented by the MR spectra in B–Q outlined; B–I represent voxels in the vertical row (top to bottom) and (J–Q) represent voxels in the horizontal row (left to right). The spectrum representing the intersection of the vertical and horizontal rows is shown twice (H and P)
- fig 3.
Scattergram of signal ratios in stereotactic biopsy target points for different tumor types. LA = low-grade astrocytoma (n = 4), HA = high-grade astrocytoma (n = 11), LY = lymphoma (n = 3)
- fig 4.
MR spectroscopic scout images and corresponding spectra represent the stereotactic biopsy target points in a high-grade (A and B) and a low-grade (C and D) astrocytoma. The two spectra are almost identical, and signal ratios could not be used to grade the tumors
Tables
- TABLE 3:
Signal ratios in neuroradiologically normal-appearing tissue and in the stereotactic target point (mean ± SD)
- TABLE 4:
Influence of MR spectroscopy on diagnostic accuracy as compared with neuroradiologic diagnosis based on distribution pattern of pathologic spectra
- TABLE 5:
Number of cases with true, histopathologically verified diagnoses for the different observers and different ranks
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