&lt;title&gt;Development of a low-cost computed tomography image processing system&lt;/title&gt;

Hughes, S. H. C.; Slocum, Robert E.

doi:10.1117/12.47770

Cited by 1 publication

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“…To meet the above-described needs, various efforts have been made, including adapting real-time radiography (RTR) systems [4], using C-arms for cone-beam CT (CBCT) [5] or extending earlier CT designs [6]. However, to our best knowledge, there is no commercial medical CT scanner available that is at a really low cost, such as < $150 K. In the current medical CT scanners, various scanning strategies were developed, all of which are based on the rotation of an x-ray source and an associated xray detector array.…”

Section: Introductionmentioning

confidence: 99%

Top-level design and pilot analysis of low-end CT scanners based on linear scanning for developing countries

Liu

Cong

et al. 2014

Journal of X-Ray Science and Technology: Clinical Applications

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The goal is to develop new architectures for computed tomography (CT) which are at an ultra-low-cost for developing countries, especially in rural areas. The proposed general scheme is inspired by the recently developed compressive sensing and interior tomography techniques, where the data acquisition system targets a region of interest (ROI) to acquire limited and truncated data. Similar to linear tomosynthesis, the source and detector are translated in opposite directions but in contrast to conventional tomosynthesis, our proposal is for either ROI reconstruction with one or more localized linear scans or global reconstruction by combining multiple ROI reconstructions. In other words, the popular slip ring is replaced by a translation based setup, and the instrumentation cost is reduced by a relaxation of the imaging speed requirement. The various translational scanning modes are theoretically analyzed, and the scanning parameters are optimized. The numerical simulation results from different numbers of linear scans confirm the feasibility of the proposed scheme, and suggest two preferred low-end systems for horizontal and vertical patient positions respectively. Ultra-low-cost x-ray CT is feasible with our proposed combination of linear scanning, compressive sensing, and interior tomography. The proposed architecture can be tailored into permanent, movable, or reconfigurable systems as desirable. Advanced image registration and spectral imaging features can be included as well.

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Section: Introductionmentioning

confidence: 99%