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首页> 外文会议>Physics of Medical Imaging pt.1; Progress in Biomedical Optics and Imaging; vol.8 no.29; Proceedings of SPIE-The International Society for Optical Engineering; vol.6510 pt.1 >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：研究用于混合双模态专用3D乳房成像系统的新型患者床设计

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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：用于专用3D乳腺癌成像（乳腺X线摄影）的混合SPECT-CT系统正在开发中。使用复杂的3D成像采集轨迹，该多功能集成系统将能够对不透射线的患者床下方3D体积中悬浮的未压缩乳房进行轮廓和成像，从而提供共同注册的体积解剖学和功能信息。这项研究探讨了病床设计中的折衷方案，以满足该成像范例特有的伴随和竞争的技术和人体工程学要求。与单探测器SPECT系统相比，CT系统的互补源探测器结构在几何上更具限制性。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的关键约束，因此重点放在那里。使用计算机辅助设计软件，检查了几种设计几何形状选项，以同时考虑和优化以下参数：图像放大率，成像的乳房体积，方位角成像范围和患者舒适度。检查了几个CT系统源到图像的距离（55-80cm），以及患者轴向最大倾斜35°。确定了用于完全床下混合成像系统的最佳病床设计。 60cm SID，约1.5的放大倍率和约15°的患者床角提供了最佳尺寸。额外的床身尺寸允许CT投射光束几乎完全成像胸壁，但是以减少CT的角度采样为代价。所获取的X射线乳腺摄影图像数据用于评估这种减小角度的获取方法的可行性。

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