| Zugriffsnummer | 48632 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Temperature dependence of the electric properties in MR phantoms |
| Autor(in); Institution |
Zanovello, Umberto; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Kilian, Wolfgang; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Troia, A.; Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.), Torino, ITALY
Arduino, A.; Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.), Torino, ITALY
Ziberti, L.; Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.), Torino, ITALY
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| Quelle/Jahr | Proceedings of the International Society for Magnetic Resonance in Medicine: 30 (2022), 3 S. |
| Artikelnummer | 3861 |
| Availability | [online only] |
| ISSN | 1545-4428 (ONLINE) |
| DOI | |
| Konferenzangaben | 31st Joint Annual Meeting ISMRM-ESMRMB & ISMRT, London, 07-12 May 2022, UK |
| Zusammenfassung | Synopsis Phantom realization represents an important activity for the development and validation of advanced MR-based quantitative imaging techniques such as Magnetic Resonance Fingerprinting or Electrical Properties Tomography. In this regard, phantoms represent a reliable ground truth with the requirement that the sought properties are properly characterised in the variety of conditions at which the phantoms will be finally deployed. In this abstract, measurements of the electrical properties of two different gel-based tissue-mimicking materials are presented as a function of their temperature. A linear dependence with positive (negative) slope between temperature and electrical conductivity (relative permittivity) is observed. INTRODUCTION Phantoms for quantitative MRI have been largely studied thanks to their potential to represent a reliable ground truth against which it is possible to validate the outcomes from quantitative imaging techniques such as Magnetic Resonance Fingerprinting (MRF) or Electrical Properties Tomography (EPT)1-3. A fundamental requirement in this regard is that the relevant physical properties of the tissue-mimicking materials composing such phantoms are properly validated in the variety of conditions at which the phantoms are supposed to be deployed. The electrical properties (EPs) of tissues are found to be a valuable bio-marker, able to provide useful diagnostic information in early tumors detection and in characterization of diseases evolution4-6. This explains the need to develop tissue-mimicking materials whose EPs are tuned to mimic those of selected tissues. A traceable characterisation of these properties opens the door for a reliable validation of the quantitative MR techniques, such as EPT, able to measure them7,8. In this abstract, the measured EPs of two different gel-based tissue-mimicking materials are presented as a function of temperature. The relevance of this study is twofold. It provides a more precise knowledge of the outcomes expected from the MR-based quantitative technique applied to a specific phantom. Furthermore, it allows to investigate the ability of the aforementioned MR techniques to determine the temperature variation via deduction of EP changes, exploiting the dependence of the phantom EPs to temperature9. |
| Themenbereich der Metrologie | Metrologie in der Medizin |