Abstract
Objective
The effects of aging, magnetic field and the voxel localization on measured concentrations of citrate (Cit), creatine (Cr), cholines (Cho) and polyamines (PA) in a healthy prostate were evaluated.
Materials and methods
36 examinations at both 1.5T and 3T imagers of 52 healthy subjects aged 19–71 years were performed with PRESS 3D-CSI sequences (TE = 120 and 145 ms). Concentrations in laboratory units and their ratios to citrate were calculated using the LCModel technique. Absolute concentrations were also obtained after the application of correction coefficients. Statistical analysis was performed using a robust linear mixed effects model.
Results
Significant effects of aging, the magnetic field strength and the voxel position in central (CZ) or peripheral (PZ) zones on all measured metabolites were found. The concentrations (mmol/kg wet tissue) including prediction intervals in a range of 20–70 years were found: Cit: 7.9–17.2; Cho: 1.4–1.7; Cr: 2.8-2.5; PA (as spermine): 0.6–2.1 at 3T in CZ. In PZ, the concentrations were higher by about 10 % as compared to CZ.
Conclusion
Increasing citrate and spermine concentrations with age are significant and correlate well with a recently described increase of zinc in the prostate. These findings should be considered in decision-making if the values obtained from a subject are in the range of control values.
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Acknowledgments
The study was supported by the Ministry of Health of the Czech Republic: Internal Grant Agency No. NT13017 and the grant project for development of research organization 00023001IKEM, Institutional support. We give thanks to Siemens for providing us with Work-In-Progress sequence GRESHIM.
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Dezortova, M., Jiru, F., Skoch, A. et al. The aging effect on prostate metabolite concentrations measured by 1H MR spectroscopy. Magn Reson Mater Phy 30, 65–74 (2017). https://doi.org/10.1007/s10334-016-0584-x
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DOI: https://doi.org/10.1007/s10334-016-0584-x