Initial clinical evaluation of gated stationary digital chest tomosynthesis

Lee, Yueh Z.; Gunnell, Elias T.; Inscoe, Christina R.; Puett, Connor; Lü, Jianping; Zhou, Otto

doi:10.1117/12.2293713

Cited by 2 publications

(1 citation statement)

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“…Furthermore, gated imaging can also be performed with the field-emission sources, for either prospectively gating micro-CT for small animal imaging 12 or gated chest tomosynthesis. 13 This paper investigates the feasibility of a stationary head CT (s-HCT) system designed using stationary linear CNT x-ray source arrays and stationary detectors. In our approach, emitters on each linear CNT x-ray source array fire sequentially and provide sufficient coverage in the object domain to fulfill CT image reconstruction requirements.…”

Section: Introductionmentioning

confidence: 99%

Simulation on system configuration for stationary head CT using linear carbon nanotube x-ray source arrays

et al. 2021

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Purpose: The invention of carbon nanotube (CNT) x-ray source arrays has enabled the development of novel imaging systems, including stationary tomosynthesis and stationary computed tomography (CT) with fast data acquisition, mechanically robust structures, and reduced image blur from source-detector motion. In this work, we report the results of simulation studies of potential system configurations for a stationary head CT (s-HCT) using linear CNT x-ray sources and detector arrays.Approach: We explored s-HCT configurations that utilize one, two, and three linear CNT source arrays. Simulations were implemented using three digital phantoms with both CPU and GPU computing. Sinogram coverage was used for qualitative evaluation of the CT projection collection efficiency for each configuration. A modified low-contrast Shepp-Logan (SL) phantom was implemented for image quality assessment using quantitative metrics. Different iterative reconstruction (IR) methods were compared with both qualitative and quantitative assessments.Results: Sinogram coverage of s-HCT configurations was sensitive to the number of CNT source arrays and geometry. The simulations suggest that a s-HCT configuration with three planes gives near complete sinogram coverage. Such a configuration enables accurate reconstruction of the low-contrast SL phantom and considerably diminished artifacts caused by the system geometry.Conclusions: An optimized s-HCT system configuration with three linear CNT x-ray source arrays is feasible. IR algorithms can diminish artifacts caused by sparse and asymmetrical scans. The proposed s-HCT system configuration is currently under construction.

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Section: Introductionmentioning

confidence: 99%