Spektroskopische bildgebung der menschlichen leber mittels 3D-CSI: Etablierung und anwendung bei patienten mit metastasiertem aderhautmelanom

Translated title of the contribution: Spectroscopic imaging of the human liver using 3D CSI: Optimization and application in patients with metastatic uvea melanoma

Meinrad Beer*, V. Winkelmann, J. C. Becker, P. Terheyden, M. Stenzel, E. B. Bröcker, D. Hahn, H. Köstler

*Corresponding author for this work

Abstract

Purpose: 31P MR spectroscopy (MRS) allows the noninvasive assessment of metabolic alterations in tumors. Due to physical as well as technical limitations, mostly large and single voxels are used. We used a spatially resolved 31P MRS technique to characterize metabolic abnormalities inside and adjacent to liver metastases of patients with uvea melanoma. Materials and Methods: Optimization of 3D chemical shift imaging (3D CSI) was performed in healthy volunteers (n = 19; voxel size 25 ml). Patients (n = 8) with liver metastases were then examined. Cross sectional imagingwas available for all patients. Results: Compared to healthy volunteers, the PME/PDE ratios of patients with liver metastasis were significantly higher (0.56 ± 0.30 vs. 0.39 ± 0.21; p < 0.05). A trend towards increased PME/beta ATP ratios (2.07 ± 1.83 vs. 1.02 ± 0.45; p = 0.12) and decreased Pi/PME ratios (0.57 ± 0.29 vs. 1.06 ± 0.58; p = 0.06) was also observed. Patients with metastases ≥5 cm showed significantly higher PME/PDE ratios (0.68 ± 0.17 vs. 0.45 ± 0.03; p < 0.05). Liver parenchyma adjacent to metastases did not show any significant changes compared to non-diseased tissue. Conclusion: 3D CSI allows the simultaneous analysis of metabolic alterations in diseased as well as in healthy human liver. Metastases show significant metabolic alterations. Thus, 31P MRS opens new possibilities for therapeutic monitoring.

Translated title of the contributionSpectroscopic imaging of the human liver using 3D CSI: Optimization and application in patients with metastatic uvea melanoma
Original languageGerman
JournalRoFo Fortschritte auf dem Gebiet der Rontgenstrahlen und der Bildgebenden Verfahren
Volume181
Issue number1
Pages (from-to)60-66
Number of pages7
ISSN1438-9029
DOIs
Publication statusPublished - 01.2009

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