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Validation of simulation tool for C-arm X-ray systems: Source and scatter model
KTH, School of Technology and Health (STH). Phelma Grenoble INP.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Continuous improvement of image quality is one of the priorities in medical imaging. Therefore, development of a simulation tool allowing to generate realistic images would be of great value to understand better the impact of the components on the image quality metrics and to choose imaging set-ups or new design features to optimize output of existing systems and to prototype new ones and to formalize the link between objective and subjective image quality metrics.

Therefore, the purpose of this project, was to contribute to adaptation and validation of an existing simulator for simulation of C-arm X-ray imaging.

Firstly, the study of the existing simulation tool was performed to choose further development axes.

Afterwards, preliminary estimations of simulation complexity by evaluating the number of photons for a given imaging examination were performed.

Previous studies[1] showed the determining impact of focal spot on imaging performance (reducing the limiting spatial frequency in common examination conditions) of X-ray interventional imaging systems.  Therefore, the work focused on the improvements of source model, in particular realistic focal spot was defined and simulations of images with close-to-real sharpness were performed and compared to experimentally acquired images.

Finally, a part of this project was dedicated to scatter study. An experimental set-up and "scatter map" analysis were designed to determine the scatter evolution as function of imaging field-of-view.  First simulations were also performed.

[1] Samei, E., Ranger, N., MacKenzie, A., Honey, I., Dobbins, J. and Ravin, C. (2008). Detector or System? Extending the Concept of Detective Quantum Efficiency to Characterize the Performance of Digital Radiographic Imaging Systems 1. Radiology, 249(3), pp.926-937.

Place, publisher, year, edition, pages
2016. , 88 p.
Series
TRITA-STH, 2016:15
Keyword [en]
Simulation, C-arm system, X-ray imaging, focal spot, scattering, image sharpness
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-185766OAI: oai:DiVA.org:kth-185766DiVA: diva2:923597
External cooperation
GE Medical Systems Buc
Subject / course
Medical Engineering
Educational program
Master of Science - Medical Engineering
Presentation
2016-03-11, Stockholm, 11:00 (English)
Supervisors
Examiners
Available from: 2016-04-27 Created: 2016-04-26 Last updated: 2016-04-27Bibliographically approved

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