Dual source CT (DSCT) imaging of obese patients

Evaluation of ct number accuracy, uniformity and noise

A. Walz-Flannigan, B. Schmidt, A. Apel, C. Eusemann, L. Yua, Cynthia H McCollough

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Obese patients present challenges in obtaining sufficient x-ray exposure over reasonable time periods for acceptable CT image quality. To overcome this limitation, the exposure can be divided between two x-ray sources using a dualsource (DS) CT system. However, cross-scatter issues in DS CT may also compromise image quality. We evaluated a DS CT system optimized for imaging obese patients, comparing the CT number accuracy and uniformity to the same images obtained with a single-source (SS) acquisition. The imaging modes were compared using both solid cylindrical PMMA phantoms and a semi-anthropomorphic thorax phantom fitted with extension rings to simulate different size patients. Clinical protocols were used and CTDIvol and kVp were held constant between SS and DS modes. Results demonstrated good agreement in CT number between SS and DS modes in CT number, with the DS mode showing better axial uniformity for the largest phantoms.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7258
DOIs
StatePublished - 2009
EventMedical Imaging 2009: Physics of Medical Imaging - Lake Buena Vista, FL, United States
Duration: Feb 9 2009Feb 12 2009

Other

OtherMedical Imaging 2009: Physics of Medical Imaging
CountryUnited States
CityLake Buena Vista, FL
Period2/9/092/12/09

Fingerprint

Image quality
Noise
Imaging techniques
X rays
evaluation
Polymethyl Methacrylate
X-Rays
Clinical Protocols
thorax
x ray sources
Thorax
acquisition
rings
x rays

Keywords

  • Beam-hardening
  • CT
  • CT number
  • Dual-source CT
  • Image quality
  • Obese
  • Scatter correction
  • Uniformity

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Walz-Flannigan, A., Schmidt, B., Apel, A., Eusemann, C., Yua, L., & McCollough, C. H. (2009). Dual source CT (DSCT) imaging of obese patients: Evaluation of ct number accuracy, uniformity and noise. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7258). [72585N] https://doi.org/10.1117/12.813737

Dual source CT (DSCT) imaging of obese patients : Evaluation of ct number accuracy, uniformity and noise. / Walz-Flannigan, A.; Schmidt, B.; Apel, A.; Eusemann, C.; Yua, L.; McCollough, Cynthia H.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7258 2009. 72585N.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Walz-Flannigan, A, Schmidt, B, Apel, A, Eusemann, C, Yua, L & McCollough, CH 2009, Dual source CT (DSCT) imaging of obese patients: Evaluation of ct number accuracy, uniformity and noise. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7258, 72585N, Medical Imaging 2009: Physics of Medical Imaging, Lake Buena Vista, FL, United States, 2/9/09. https://doi.org/10.1117/12.813737
Walz-Flannigan A, Schmidt B, Apel A, Eusemann C, Yua L, McCollough CH. Dual source CT (DSCT) imaging of obese patients: Evaluation of ct number accuracy, uniformity and noise. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7258. 2009. 72585N https://doi.org/10.1117/12.813737
Walz-Flannigan, A. ; Schmidt, B. ; Apel, A. ; Eusemann, C. ; Yua, L. ; McCollough, Cynthia H. / Dual source CT (DSCT) imaging of obese patients : Evaluation of ct number accuracy, uniformity and noise. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7258 2009.
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