Ultra-high spatial resolution multi-energy CT using photon counting detector technology

Shuai Leng, R. Gutjahr, Andrea Ferrero, S. Kappler, A. Henning, A. Halaweish, W. Zhou, J. Montoya, Cynthia H McCollough

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

16 Citations (Scopus)

Abstract

Two ultra-high-resolution (UHR) imaging modes, each with two energy thresholds, were implemented on a research, whole-body photon-counting-detector (PCD) CT scanner, referred to as sharp and UHR, respectively. The UHR mode has a pixel size of 0.25 mm at iso-center for both energy thresholds, with a collimation of 32 × 0.25 mm. The sharp mode has a 0.25 mm pixel for the low-energy threshold and 0.5 mm for the high-energy threshold, with a collimation of 48 × 0.25 mm. Kidney stones with mixed mineral composition and lung nodules with different shapes were scanned using both modes, and with the standard imaging mode, referred to as macro mode (0.5 mm pixel and 32 × 0.5 mm collimation). Evaluation and comparison of the three modes focused on the ability to accurately delineate anatomic structures using the high-spatial resolution capability and the ability to quantify stone composition using the multi-energy capability. The low-energy threshold images of the sharp and UHR modes showed better shape and texture information due to the achieved higher spatial resolution, although noise was also higher. No noticeable benefit was shown in multi-energy analysis using UHR compared to standard resolution (macro mode) when standard doses were used. This was due to excessive noise in the higher resolution images. However, UHR scans at higher dose showed improvement in multi-energy analysis over macro mode with regular dose. To fully take advantage of the higher spatial resolution in multi-energy analysis, either increased radiation dose, or application of noise reduction techniques, is needed.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2017
Subtitle of host publicationPhysics of Medical Imaging
PublisherSPIE
Volume10132
ISBN (Electronic)9781510607095
DOIs
StatePublished - 2017
EventMedical Imaging 2017: Physics of Medical Imaging - Orlando, United States
Duration: Feb 13 2017Feb 16 2017

Other

OtherMedical Imaging 2017: Physics of Medical Imaging
CountryUnited States
CityOrlando
Period2/13/172/16/17

Fingerprint

Photons
Macros
Noise
counting
spatial resolution
Pixels
Technology
Detectors
high resolution
detectors
photons
Whole-Body Counting
Imaging techniques
Kidney Calculi
Image resolution
Noise abatement
Chemical analysis
collimation
Dosimetry
Minerals

Keywords

  • Computed tomography (CT)
  • Dual energy
  • High resolution
  • Photon counting detector (PCD)

ASJC Scopus subject areas

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

Cite this

Leng, S., Gutjahr, R., Ferrero, A., Kappler, S., Henning, A., Halaweish, A., ... McCollough, C. H. (2017). Ultra-high spatial resolution multi-energy CT using photon counting detector technology. In Medical Imaging 2017: Physics of Medical Imaging (Vol. 10132). [101320Y] SPIE. https://doi.org/10.1117/12.2255589

Ultra-high spatial resolution multi-energy CT using photon counting detector technology. / Leng, Shuai; Gutjahr, R.; Ferrero, Andrea; Kappler, S.; Henning, A.; Halaweish, A.; Zhou, W.; Montoya, J.; McCollough, Cynthia H.

Medical Imaging 2017: Physics of Medical Imaging. Vol. 10132 SPIE, 2017. 101320Y.

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

Leng, S, Gutjahr, R, Ferrero, A, Kappler, S, Henning, A, Halaweish, A, Zhou, W, Montoya, J & McCollough, CH 2017, Ultra-high spatial resolution multi-energy CT using photon counting detector technology. in Medical Imaging 2017: Physics of Medical Imaging. vol. 10132, 101320Y, SPIE, Medical Imaging 2017: Physics of Medical Imaging, Orlando, United States, 2/13/17. https://doi.org/10.1117/12.2255589
Leng S, Gutjahr R, Ferrero A, Kappler S, Henning A, Halaweish A et al. Ultra-high spatial resolution multi-energy CT using photon counting detector technology. In Medical Imaging 2017: Physics of Medical Imaging. Vol. 10132. SPIE. 2017. 101320Y https://doi.org/10.1117/12.2255589
Leng, Shuai ; Gutjahr, R. ; Ferrero, Andrea ; Kappler, S. ; Henning, A. ; Halaweish, A. ; Zhou, W. ; Montoya, J. ; McCollough, Cynthia H. / Ultra-high spatial resolution multi-energy CT using photon counting detector technology. Medical Imaging 2017: Physics of Medical Imaging. Vol. 10132 SPIE, 2017.
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