Compressed sensing for phase contrast CT

Journal Article · Tue Jul 31 00:00:00 EDT 2012 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4742284· OSTI ID:22069161

Gaass, Thomas; Potdevin, Guillaume; Noeel, Peter B; Tapfer, Arne; Willner, Marian; Herzen, Julia; Bech, Martin; Pfeiffer, Franz; Haase, Axel ^[1]

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1. Zentralinstitut fuer Medizintechnik, Technische Universitaet Muenchen, Garching (Germany)

Modern x-ray techniques opened the possibility to retrieve phase information. Phase-contrast computed tomography (PCCT) has the potential to significantly improve soft tissue contrast. Radiation dose, however, continues to be an issue when moving from bench to bedside. Dose reduction in this work is achieved by sparsely acquiring PCCT data. To compensate for appearing aliasing artifacts we introduce a compressed sensing (CS) reconstruction framework. We present the feasibility of CS on PCCT with numerical as well as measured phantom data. The results proof that CS compensates for under-sampling artifacts and maintains the superior soft tissue contrast and detail visibility in the reconstructed images.

• OSTI ID: 22069161
• Journal Information: AIP Conference Proceedings, Vol. 1466, Issue 1; Conference: International workshop on X-ray and neutron phase imaging with gratings, Tokyo (Japan), 5-7 Mar 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
60 APPLIED LIFE SCIENCES
ANIMAL TISSUES
DOSIMETRY
IMAGE PROCESSING
IMAGES
PHANTOMS
PHOTON COMPUTED TOMOGRAPHY
RADIATION DOSES
SAMPLING
VISIBILITY
X RADIATION