11CO2'/> New Imaging Method of Positrons Leaving the Source Application for PET/MR hybrid Scanners -
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IEEE Nuclear Science Symposium;Medical Imaging Conference >New Imaging Method of Positrons Leaving the Source Application for PET/MR hybrid Scanners -
【24h】

New Imaging Method of Positrons Leaving the Source Application for PET/MR hybrid Scanners -

机译：正电子的新成像方法离开了PET / MR混合扫描仪的源应用-

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The 11CO2 tracer is of high interest to study carbon transport in living plants. However, conventional PET images of plant leaves suffer from the poor positron annihilation probability in the targeted structures, thus giving strong bias in reconstructed images. Here, PET/MR hybrid scanner systems offer a new method to detect and quantify escaping positrons as 2D projections by exploiting the directed travelling of positrons parallel to the present B0 field of the MR magnet system. Due to the Lorentz force all emitted positrons propagate on spiral trajectories parallel to the B0 field with tiny gyroradii. The introduction of a thin absorber screen within the field-of-view of the PET scanner, forces the annihilation of almost all incoming positrons inside the absorber. The annihilation photon pairs can be registered as coincidences and thus directly indicate the positron impact point on the screen by interpolating the Lines-of-Response onto the screen. In this way, 2D images are obtained and the amount of positrons leaving the source can be quantified dynamically.
机译：这 11 一氧化碳 2 示踪剂对于研究活植物中的碳迁移具有很高的兴趣。然而，常规的植物叶片PET图像在目标结构中正电子an灭的可能性很低，因此在重建图像中产生了很大的偏差。在这里，PET / MR混合扫描仪系统提供了一种新方法，可通过利用平行于当前B的正电子的定向传播来检测和量化作为2D投影的逃逸正电子。 0 MR磁铁系统的磁场。由于洛伦兹力，所有发射的正电子在平行于B的螺旋轨迹上传播 0 极小的陀螺半径的领域。在PET扫描仪的视野范围内引入了薄的吸收器筛网，从而迫使吸收器内部几乎所有进入的正电子an灭。 an灭光子对可以记录为巧合，因此可以通过将响应线插值到屏幕上来直接在屏幕上指示正电子撞击点。通过这种方式，可以获得2D图像，并且可以动态量化离开源的正电子数量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号