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[Thermometry by measuring the chemical shift of lanthanide complex]
P Konstanczak1, P Wust, B Sander
1Strahlenklinik und Poliklinik, Virchow-Klinikum, Medizinische Fakultät, Humboldt-Universität zu Berlin.
Summary
A new praseodymium complex offers accurate, non-invasive temperature measurement for hyperthermia treatments. This spectroscopic method shows promise for clinical use, overcoming limitations of existing magnetic resonance techniques.
Area of Science:
- Biomedical Engineering
- Chemical Physics
- Medical Physics
Context:
- Non-invasive thermometry is crucial for advancing regional hyperthermia treatments.
- Current magnetic resonance tomography (MRT) methods (T1, diffusion, proton resonance frequency) face significant artifacts in pelvic applications.
- These artifacts stem from tissue complexities, physiological movements, and instrumental instabilities.
Purpose:
- To evaluate a novel temperature-sensitive praseodymium complex (Pr-MOE-DO3A) for non-invasive thermometry.
- To determine the relationship between temperature and chemical shift of the praseodymium complex.
- To assess the suitability of this spectroscopic method for clinical hyperthermia monitoring.
Summary:
- A praseodymium complex exhibited a linear, temperature-dependent chemical shift (0.13 ppm/°C) with a resolution of +/-0.6°C.
- Chemical shift imaging (CSI) using this complex demonstrated good signal-to-noise ratios in phantom studies.
- The method showed robustness against common artifacts affecting other MRT-based thermometry techniques.
Impact:
- This praseodymium-based spectroscopic thermometry offers a promising artifact-resistant alternative for clinical hyperthermia.
- It enables more accurate temperature monitoring, potentially improving treatment efficacy and patient outcomes.
- Further investigation into competing non-invasive thermometry methods using MRT/spectroscopy is warranted.