Search results for " Nuclear Magnetic Resonance relaxometry"

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Correlation between ferrous ammonium sulfate concentration, sensitivity and stability of Fricke gel dosimeters exposed to clinical X-ray beams

2014

Abstract This work describes the characterization of various Fricke-Agarose-Xylenol gels (FXG) dosimeters using NMR relaxometry and MRI analysis. Using X-rays from a clinical linear accelerator (LINAC), the gels were irradiated in the dose range from 0 Gy to 20 Gy. The photon sensitivity of the FXGs was measured in terms of NMR relaxation rates; its dependence on radiation dose was determined as a function of ferrous ammonium sulfate contents (from 0.5 mM to 5 mM). Furthermore, the stability of the NMR signal was monitored over several days after irradiation. These measurements were aided by Magnetic Resonance Imaging (MRI) scans which allowed three-dimensional (3D) dose mapping. In order t…

Nuclear and High Energy PhysicsRelaxometryPhotonDosimetermedicine.diagnostic_testChemistrySettore ING-IND/20 - Misure E Strumentazione NucleariDetectorSettore FIS/01 - Fisica SperimentaleMagnetic resonance imagingSignalLinear particle acceleratorSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Nuclear magnetic resonancemedicineIrradiationSettore MED/36 - Diagnostica Per Immagini E RadioterapiaInstrumentationGel dosimeter Agarose Nuclear Magnetic Resonance relaxometryMagnetic Resonance Imaging clinical photons beam
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