@inproceedings{01J53GVS2V1JNFAX6M5SV66EPP,
  abstract     = {{To increase the efficiency and reduce the cost of Total-Body PET imaging, our group is developing a new system based on flat-panel detectors in between which patients are scanned in a standing position. Its unconventional geometry however complicates the integration of a CT component. Novel carbon nanotube (CNT) sources may be used to create flexible CT geometries, in which alternating activation of sources obviates the need for source and detector rotation. We propose a rectangular CT geometry which obtains 3D tomographic images during a vertical translation movement. In this study, the effects of several geometrical factors on sinogram filling and image quality are studied in order to choose an optimal source-detector arrangement. A raytracing simulation package is developed, and a data processing chain is established to convert the rectangular measurements to sinogram data. Filtered backprojection (FBP) and iterative gradient descent (GD) reconstruction are used to study the image artifacts associated with the different types of gaps in the sinogram. Three geometric variations (varying source spacing, gaps at the source array edges, and only using the detector opposing the source) introduce different types of gaps in the sinogram, and artifacts in the image. GD is able to strongly reduce the artifacts present in the FBP image, but further improvements are required to achieve images of diagnostic quality}},
  author       = {{Vervenne, Boris and Maebe, Jens and Vandenberghe, Stefaan}},
  keywords     = {{PET-CT,non-conventional geometries,CNT sources,limited angle tomography,simulation}},
  language     = {{und}},
  location     = {{Bamberg, Germany}},
  pages        = {{272--275}},
  title        = {{Feasibility Study of a Rectangular CT Geometry for High Throughput Total-Body PET-CT}},
  url          = {{https://www.ct-meeting.org/index.php?p=program}},
  year         = {{2024}},
}