This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.2967/jnumed.113.129007 in citations.
Comparison of $^{18}$F-FET PET and perfusion weighted MR imaging: a PET-MR imaging hybrid study in patients with brain tumors.
Comparison of $^{18}$F-FET PET and perfusion weighted MR imaging: a PET-MR imaging hybrid study in patients with brain tumors.
PET using O-(2-$^{18}$F-fluoroethyl)-L-tyrosine ($^{18}$F-FET) provides important diagnostic information in addition to that from conventional MR imaging on tumor extent and activity of cerebral gliomas. Recent studies suggest that perfusion-weighted MR imaging (PWI), especially maps of regional cer...
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Personal Name(s): | Filss, Christian (Corresponding author) |
---|---|
Galldiks, Norbert / Stoffels, Gabriele / Sabel, M. / Wittsack, H. J. / Turowski, B. / Antoch, G. / Zhang, Ke / Fink, Gereon Rudolf / Coenen, Heinrich Hubert / Shah, N. J. / Herzog, Hans / Langen, Karl-Josef | |
Contributing Institute: |
Kognitive Neurowissenschaften; INM-3 JARA-BRAIN; JARA-BRAIN Nuklearchemie; INM-5 Physik der Medizinischen Bildgebung; INM-4 |
Published in: | Journal of Nuclear Medicine Journal of nuclear medicine, 55 55 (2014 2014) 4 4, S. 540-545 540-545 |
Imprint: |
Reston, Va.
SNM
2014
2014-02-27 2014-04-01 2014-04-01 |
PubMed ID: |
24578243 |
DOI: |
10.2967/jnumed.113.129007 |
Document Type: |
Journal Article |
Research Program: |
Neuroimaging Imaging the Living Brain Pathophysiological Mechanisms of Neurological and Psychiatric Diseases |
Publikationsportal JuSER |
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520 | |a PET using O-(2-$^{18}$F-fluoroethyl)-L-tyrosine ($^{18}$F-FET) provides important diagnostic information in addition to that from conventional MR imaging on tumor extent and activity of cerebral gliomas. Recent studies suggest that perfusion-weighted MR imaging (PWI), especially maps of regional cerebral blood volume (rCBV), may provide similar diagnostic information. In this study, we directly compared $^{18}$F-FET PET and PWI in patients with brain tumors. Methods: Fifty-six patients with gliomas were investigated using static $^{18}$F-FET PET and PWI. For comparison, 8 patients with meningiomas were included.We generated a set of tumor and reference volumes of interest (VOIs) based on morphologic MR imaging and transferred these VOIs to the corresponding $^{18}$F-FET PET scans and PWI maps. From these VOIs, tumor-to-brain ratios (TBR) were calculated, and normalized histograms were generated for $^{18}$F-FET PET and rCBV maps. Furthermore, in rCBV maps and in $^{18}$F-FET PET scans, tumor volumes, their spatial congruence, and the distance between the local hot spots were assessed. Results: For patients with glioma, TBR was significantly higher in $^{18}$F-FET PET than in rCBV maps (TBR, 2.28 ± 0.99 vs. 1.62 ± 1.13; P < 0.001). Histogram analysis of the VOIs revealed that $^{18}$F-FET scans could clearly separate tumor from background. In contrast, deriving this information from rCBV maps was difficult. Tumor volumes were significantly larger in $^{18}$F-FET PET than in rCBV maps (tumor volume, 24.3 ± 26.5 mL vs. 8.9 ± 13.9 mL; P < 0.001). Accordingly, spatial overlap of both imaging parameters was poor (congruence, 11.0%), and mean distance between the local hot spots was 25.4 ± 16.1 mm. In meningioma patients, TBR was higher in rCBV maps than in $^{18}$F-FET PET (TBR, 5.33 ± 2.63 vs. 2.37 ± 0.32; P < 0.001) whereas tumor volumes were comparable. Conclusion: In patients with cerebral glioma, tumor imaging with $^{18}$F-FET PET and rCBV yields different information. $^{18}$F-FET PET shows considerably higher TBRs and larger tumor volumes than rCBV maps. The spatial congruence of both parameters is poor. The locations of the local hot spots differ considerably. Taken together, our data show that metabolically active tumor tissue of gliomas as depicted by amino acid PET is not reflected by rCBV as measured with PWI. | ||
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