Abstract
Purpose
To demonstrate that fully navigated magnetic resonance spectroscopy (MRS) with inner-volume saturation (IVS) at 3 T results in high-quality spectra that permit evaluating metabolic changes in hepatic metastases without the need for patient compliance.
Methods
Nine patients with untreated, biopsy-proven large hepatic metastases (minimum diameter of 3 cm) were included. In each patient, localized proton MRS was performed in the metastatic lesion and in uninvolved liver parenchyma. To improve quality and consistency of proton MRS, navigator gating was thereby performed not only during acquisition of the spectroscopic data but also during localization imaging and throughout the preparation phases. IVS was utilized to reduce chemical shift displacement between different metabolites and to diminish flow artifacts. Metabolite quantities were normalized relative to the unsuppressed water peak and choline-containing compounds (CCC) to lipid ratios were determined. Wilcoxon signed-rank tests were used to assess differences in the amounts of lipids and CCC as well as the CCC-to-lipid ratios between liver metastases and normal-appearing liver parenchyma.
Results
Fully navigated point-resolved spectroscopy with IVS resulted in high-quality spectra in all patients. Navigator gating during localization imaging and spectroscopic acquisition thereby ensured a precise localization of the spectroscopic voxel. Decreased quantities of lipid and CCC were observed in metastatic tissue compared with uninvolved liver parenchyma. However, the latter trend fell short of statistical significance. Moreover, elevated levels of the CCC-to-lipid ratios were detected in metastatic tissue relative to normal-appearing liver parenchyma.
Conclusions
The present study demonstrates that fully navigated MRS of the liver with IVS at 3 T allows for a precise localization of the spectroscopic voxel and results in high-quality spectra that permit evaluating liver metabolism without the need for patient compliance.
Similar content being viewed by others
References
Jeong YY, Mitchell DG, Kamishima T (2002) Small (<20 mm) enhancing hepatic nodules seen on arterial phase MR imaging of the cirrhotic liver: clinical implications. AJR Am J Roentgenol 178:1327–1334
Soper R, Himmelreich U, Painter D, et al. (2002) Pathology of hepatocellular carcinoma and its precursors using proton magnetic resonance spectroscopy and a statistical classification strategy. Pathology 34:417–422
Kuo YT, Li CW, Chen CY, et al. (2004) In vivo proton magnetic resonance spectroscopy of large focal hepatic lesions and metabolite change of hepatocellular carcinoma before and after transcatheter arterial chemoembolization using 3.0-T MR scanner. J Magn Reson Imaging 19:598–604
Fischbach F, Schirmer T, Thormann M, et al. (2008) Quantitative proton magnetic resonance spectroscopy of the normal liver and malignant hepatic lesions at 3.0 Tesla. Eur Radiol 18:2549–2558
Tyszka JM, Silverman JM (1998) Navigated single-voxel proton spectroscopy of the human liver. Magn Reson Med 39:1–5
Hock A, Valkovic L, Geier A, et al. (2014) Navigator based respiratory gating during acquisition and preparation phases for proton liver spectroscopy at 3 T. NMR Biomed 27:348–355
Edden RA, Schar M, Hillis AE, Barker PB (2006) Optimized detection of lactate at high fields using inner volume saturation. Magn Reson Med 56:912–917
Hock A, MacMillan EL, Fuchs A, et al. (2013) Non-water-suppressed proton MR spectroscopy improves spectral quality in the human spinal cord. Magn Reson Med 69:1253–1260
Hock A, Wilm B, Zandomeneghi G, et al. (2016) Neurochemical profile of the human cervical spinal cord determined by MRS. NMR Biomed 29:1464–1476
Li CW, Kuo YC, Chen CY, et al. (2005) Quantification of choline compounds in human hepatic tumors by proton MR spectroscopy at 3 T. Magn Reson Med 53:770–776
Dagnelie PC, Sijens PE, Kraus DJ, Planting AS, van Dijk P (1999) Abnormal liver metabolism in cancer patients detected by (31)P MR spectroscopy. NMR Biomed 12:535–544
Schulte RF, Henning A, Tsao J, Boesiger P, Pruessmann KP (2007) Design of broadband RF pulses with polynomial-phase response. J Magn Reson 186:167–175
Hock A, Fuchs A, Boesiger P, Kollias SS, Henning A (2013) Electrocardiogram-triggered, higher order, projection-based B(0) shimming allows for fast and reproducible shim convergence in spinal cord (1)H MRS. NMR Biomed 26:329–335
Gruetter R, Tkac I (2000) Field mapping without reference scan using asymmetric echo-planar techniques. Magn Reson Med 43:319–323
Schar M, Kozerke S, Fischer SE, Boesiger P (2004) Cardiac SSFP imaging at 3 Tesla. Magn Reson Med 51:799–806
Ehman RL, Felmlee JP (1989) Adaptive technique for high-definition MR imaging of moving structures. Radiology 173:255–263
Provencher SW (1993) Estimation of metabolite concentrations from localized in vivo proton NMR spectra. Magn Reson Med 30:672–679
Xu L, Liu B, Huang Y, et al. (2013) 3.0 T proton magnetic resonance spectroscopy of the liver: quantification of choline. World J Gastroenterol 19:1472–1477
Bell JD, Cox IJ, Sargentoni J, et al. (1993) A 31P and 1H-NMR investigation in vitro of normal and abnormal human liver. Biochim Biophys Acta 1225:71–77
Cho SG, Kim MY, Kim HJ, et al. (2001) Chronic hepatitis: in vivo proton MR spectroscopic evaluation of the liver and correlation with histopathologic findings. Radiology 221:740–746
Chen CY, Li CW, Kuo YT, et al. (2006) Early response of hepatocellular carcinoma to transcatheter arterial chemoembolization: choline levels and MR diffusion constants–initial experience. Radiology 239:448–456
Tarasow E, Siergiejczyk L, Panasiuk A, et al. (2002) MR proton spectroscopy in liver examinations of healthy individuals in vivo. Med Sci Monit 8:36–40
Barantin L, Le Pape A, Akoka S (1997) A new method for absolute quantitation of MRS metabolites. Magn Reson Med 38:179–182
Heinzer-Schweizer S, De Zanche N, Pavan M, et al. (2010) In-vivo assessment of tissue metabolite levels using 1H MRS and the Electric REference To access In vivo Concentrations (ERETIC) method. NMR Biomed 23:406–413
Akoka S, Barantin L, Trierweiler M (1999) Concentration measurement by proton NMR using the ERETIC method. Anal Chem 71:2554–2557
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Funding
No funding was received for this study.
Conflict of interest
The authors declare that they have no conflict of interest.
Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed consent
Institutional review board approval and waiver for informed consent was obtained for this retrospective study.
Rights and permissions
About this article
Cite this article
Reischauer, C., Hock, A., Kolokythas, O. et al. Fully navigated 3 T proton magnetic resonance spectroscopy of liver metastases with inner-volume saturation. Abdom Radiol 42, 2615–2622 (2017). https://doi.org/10.1007/s00261-017-1173-9
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00261-017-1173-9