RTK/Meetings/OnImageQualityInStaticCBCT: Difference between revisions
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* Philipp Steininger, radART / MedPhoton, Salzburg, Austria | * Philipp Steininger, radART / MedPhoton, Salzburg, Austria | ||
* Sébastien Brousmiche, IBA, Louvain-La-Neuve, Belgium | * Sébastien Brousmiche, IBA, Louvain-La-Neuve, Belgium | ||
* Geoff Hugo, VCU, USA | * Geoff Hugo, VCU, USA | ||
* Yu Liu, ETHZ, Switzerland | * Yu Liu, ETHZ, Switzerland | ||
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= Problems addressed = | = Problems addressed = | ||
* X-ray tube (geometric blurring, focal spot movements, fluctuations, heel effect) | |||
* Detector lag | * Detector lag | ||
* Scatter glare | * Scatter glare | ||
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* Statistical noise | * Statistical noise | ||
* Geometric calibration | * Geometric calibration | ||
* Truncation | |||
= Agenda = | = Agenda = | ||
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* 14h45 - Quantum noise | * 14h45 - Quantum noise | ||
* 15h30 - Break | * 15h30 - Break | ||
* 16h00 - Discussion (summary and action points) | * 16h00 - Geometric calibration | ||
* 16h45 - Discussion (summary and action points) | |||
= Existing RTK solutions = | = Existing RTK solutions = | ||
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* [http://en.wikipedia.org/wiki/Savitzky%E2%80%93Golay_filter Savitzky–Golay filter] | * [http://en.wikipedia.org/wiki/Savitzky%E2%80%93Golay_filter Savitzky–Golay filter] | ||
* [http://dx.doi.org/10.1088/0031-9155/55/22/007 Scatter Kernel Superposition ( | * [http://dx.doi.org/10.1007/s003300050710 Scatter Kernel Superposition (SKS)] and [http://dx.doi.org/10.1088/0031-9155/55/22/007 Scatter Kernel Superposition (ASKS)] | ||
* [http://dx.doi.org/10.1118/1.4923179 Scatter correction using prior scatter-free CT] | * [http://dx.doi.org/10.1118/1.4923179 Scatter correction using prior scatter-free CT] | ||
Latest revision as of 03:14, 31 July 2015
Date
Friday, July 31, 2015
Venue
- Salle Marcel Dargent, 2ème étage, centre Léon Bérard, Lyon, France. The room has a videoconference equipment.
- Information on how to come to the Léon Bérard center is available here.
- Hotels: there are a few options around at a walking distance of the Léon Bérard center, any option along the metro line metro D is good.
Attending
- Simon Rit, CREATIS, Lyon, France
- Jean Michel Létang, CREATIS, Lyon, France
- Gloria Vilches Freixas, CREATIS, Lyon, France
- Philipp Steininger, radART / MedPhoton, Salzburg, Austria
- Sébastien Brousmiche, IBA, Louvain-La-Neuve, Belgium
- Geoff Hugo, VCU, USA
- Yu Liu, ETHZ, Switzerland
- Mathieu Dupont, CPPM, France
- Thibault Notargiacomo, GIPSA / Thales, France
- Edward Romero, Safran, France
Problems addressed
- X-ray tube (geometric blurring, focal spot movements, fluctuations, heel effect)
- Detector lag
- Scatter glare
- Patient scatter
- Beam hardening
- Statistical noise
- Geometric calibration
- Truncation
Agenda
- 9h00 - Welcome coffee, round table
- 9h30 - Presentation of cone-beam CT systems, review of characteristics (x-ray source, flat panel, geometry)
- 10h00 - Summary of artefact sources
- 10h45 - Break
- 11h00 - Detector effects (lag and glare)
- 11h45 - Beam hardening
- 12h30 - Lunch
- 13h30 - Scatter
- 14h45 - Quantum noise
- 15h30 - Break
- 16h00 - Geometric calibration
- 16h45 - Discussion (summary and action points)
Existing RTK solutions
- Look up table for linearizing input projection values, see, e.g., this work
- Boellaard's scatter correction algorithm
- Empirical cupping correction
- Scatter glare removal
- Lag correction
- Windowing in the ramp filter
- Iterative reconstruction algorithms
State-of-the-art algorithms that are missing
- Savitzky–Golay filter
- Scatter Kernel Superposition (SKS) and Scatter Kernel Superposition (ASKS)
- Scatter correction using prior scatter-free CT
Solutions under development / Being investigated
- Monte Carlo scatter correction (Simon Rit)