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首页> 外文会议>Conference on Medical Imaging: Physics of Medical Imaging >Investigating novel patient bed designs for use in a hybrid dual modality dedicated 3D breast imaging system
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Investigating novel patient bed designs for use in a hybrid dual modality dedicated 3D breast imaging system

机译：调查新型患者床设计，用于混合三种方式专用3D乳房成像系统

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A hybrid SPECT-CT system for dedicated 3D breast cancer imaging (mammotomography) is in development. Using complex 3D imaging acquisition trajectories, the versatile integrated system will be capable of contouring and imaging an uncompressed breast suspended in a 3D volume located below a radio-opaque patient bed, providing co-registered volumetric anatomical and functional information. This study examines tradeoffs involved in the design of the patient bed to satisfy concomitant and competing technical and ergonomic requirements specific to this imaging paradigm. The complementary source-detector arrangement of the CT system is geometrically more restrictive than that of the single detector SPECT system. Additionally, the compact dimensions and size of the CT system components (primarily the x-ray tube) are key constraints on the bed design and so the focus is concentrated there. Using computer-aided design software, several design geometry options are examined to simultaneously consider and optimize the following parameters: image magnification, imaged breast volume, azimuthal imaging span, and patient comfort. Several CT system source to image distances are examined (55-80cm), as well as axial patient tilt up to 35°. An optimal patient bed design for a completely under-bed hybrid imaging system was determined. A 60cm SID, magnification factor of ～1.5, and patient bed angled at ～15° provided the optimal dimensions. Additional bed dimensions allow the CT projection beam to nearly entirely image the chest wall, however at the cost of reduced angular sampling for CT. Acquired x-ray mammotomographic image data is used to assess the feasibility of this reduced angle acquisition approach.
机译：一种用于专用3D乳腺癌成像（乳腺分析）的混合SPECT-CT系统正在开发中。使用复杂的3D成像采集轨迹，多功能集成系统将能够在位于无线电不透明患者床下方的3D体积中悬挂和成像，该未压缩的乳房悬挂在无线电不透明患者床下方，提供共同登记的体积解剖和功能信息。本研究审查了患者床设计中涉及的权衡，以满足这种成像范式特异的伴随和竞争的技术和人体工程学要求。 CT系统的互补源检测器布置比单个检测器SPECT系统的几何上更具限制性。另外，CT系统组件（主要是X射线管）的紧凑尺寸和尺寸是床设计上的关键约束，因此焦点集中在那里。使用计算机辅助设计软件，检查了几种设计几何选项，同时考虑并优化以下参数：图像放大，成像额度，方位角成像跨度和患者舒适度。检查图像距离的几个CT系统源（55-80cm），以及轴向患者倾斜至35°。确定了完全床上床混合成像系统的最佳患者床设计。 60cm SID，放大系数为〜1.5，患者床在〜15°角度提供最佳尺寸。额外的床尺寸允许CT投影光束几乎完全映像胸壁，然而，在CT的角度采样减小的成本下。获取的X射线乳头图图像数据用于评估该减小角度采集方法的可行性。

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