New high resolution radiation dose mapping of special type polymer-gel dosimeters using mini-MRI scanner of high (4.7 Tesla) magnetic field

使用高（4.7 特斯拉）磁场微型 MRI 扫描仪对特殊类型聚合物凝胶剂量计进行新型高分辨率辐射剂量测绘

• 批准号: LP0348841
• 负责人: A/Prof Moshi Geso
• 金额: $ 5.7万
• 依托单位: RMIT University
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-12-31 至 2007-08-19
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP0348841
• 关键词: New; resolution; radiation; dose; mapping

Gel dosimeters main advantage is dose determination in 3-dimensions. Their main limitation is low spatial-resolution. We propose fabrication of special-type gels and for the first time use the 4.7 Tesla mini-scanner for dose mapping. Increased magnetic field combined with a small aperture for field dissipation will greatly improve spatial resolution down to micrometers (micro-dosimetry). This new technique will render gel-dosimeters suitable for applications in radiotherapy, industrial and all other radiation fields. Moreover, we will employ new parameter for dose mapping, which is expected to be more sensitive to radiation than the currently used relaxation times

凝胶剂量计的主要优点是在三维剂量测定。它们的主要限制是空间分辨率低。我们建议制造特殊类型的凝胶，并首次使用4.7特斯拉的微型扫描仪进行剂量分布。 增加的磁场与用于场耗散的小孔相结合将大大提高空间分辨率，低至微米（微剂量测定）。 这项新技术将使凝胶剂量计适用于放射治疗，工业和所有其他辐射领域的应用。此外，我们将采用新的参数进行剂量映射，预计该参数比目前使用的弛豫时间对辐射更敏感