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View article: Detection and estimation of rigid patient motion during SPECT acquisition with exponential data consistency conditions
Detection and estimation of rigid patient motion during SPECT acquisition with exponential data consistency conditions Open
International audience
View article: Prediction of image noise in two-step K-edge CT imaging using variance reconstruction of the Cramér-Rao lower bound
Prediction of image noise in two-step K-edge CT imaging using variance reconstruction of the Cramér-Rao lower bound Open
International audience
View article: Twelve Years of LabEx PRIMES (2012-2024)
Twelve Years of LabEx PRIMES (2012-2024) Open
An overview of the research performed in the Auvergne Rhône Alpes Region within theLaboratoire d’Excellence Physics, Radiobiology, Medical Imaging, and Simulation
View article: Ion and secondary imaging
Ion and secondary imaging Open
International audience
View article: Experimental evaluation of rigid patient motion detection and correction in SPECT with exponential data consistency conditions
Experimental evaluation of rigid patient motion detection and correction in SPECT with exponential data consistency conditions Open
International audience
View article: Erratum to “The role of Monte Carlo simulation in understanding the performance of proton computed tomography” [Z Med Phys 32 (2022) 23–38]
Erratum to “The role of Monte Carlo simulation in understanding the performance of proton computed tomography” [Z Med Phys 32 (2022) 23–38] Open
View article: Refraction simulation for optimisation of X-Ray Phase Contrast imaging
Refraction simulation for optimisation of X-Ray Phase Contrast imaging Open
International audience
View article: Image Reconstruction With Local Directional Total Variation Regularization Using Tomographic Incompleteness Maps
Image Reconstruction With Local Directional Total Variation Regularization Using Tomographic Incompleteness Maps Open
International audience
View article: Detection and correction of rigid patient motion in SPECT with exponential data consistency conditions
Detection and correction of rigid patient motion in SPECT with exponential data consistency conditions Open
International audience
View article: Comparison of saddle and helical trajectories of a mobile cone beam computed tomography scanner with online calibration correction
Comparison of saddle and helical trajectories of a mobile cone beam computed tomography scanner with online calibration correction Open
International audience
View article: Reconstruction Toolkit (RTK) v2, an Insight Toolkit (ITK) module for tomographic reconstruction
Reconstruction Toolkit (RTK) v2, an Insight Toolkit (ITK) module for tomographic reconstruction Open
International audience
View article: Simulation of diffraction and scattering using the Wigner distribution function
Simulation of diffraction and scattering using the Wigner distribution function Open
We present a new, to the best of our knowledge, method to simulate diffraction images accounting for both coherent and incoherent effects, based on the Wigner distribution function of the exit wave. This permits the simulation of wave and …
View article: Taking into account wave effects in Monte Carlo simulation of phase contrast imaging using the Wigner distribution function
Taking into account wave effects in Monte Carlo simulation of phase contrast imaging using the Wigner distribution function Open
International audience
View article: Simulation of diffraction and scattering using the Wigner Distribution Function
Simulation of diffraction and scattering using the Wigner Distribution Function Open
X-ray phase-contrast imaging enhances soft tissue visualization by leveraging the phase shift of X-rays passing through materials. It permits to minimize radiation exposure due to high contrast, as well as high resolution imaging limited b…
View article: Combining Wave and Particle Effects in the Simulation of X-ray Phase Contrast—A Review
Combining Wave and Particle Effects in the Simulation of X-ray Phase Contrast—A Review Open
X-ray phase-contrast imaging (XPCI) is a family of imaging techniques that makes contrast visible due to phase shifts in the sample. Phase-sensitive techniques can potentially be several orders of magnitude more sensitive than attenuation-…
View article: Reduction of cone‐beam CT artifacts in a robotic CBCT device using saddle trajectories with integrated infrared tracking
Reduction of cone‐beam CT artifacts in a robotic CBCT device using saddle trajectories with integrated infrared tracking Open
Background Cone beam computed tomography (CBCT) is widely used in many medical fields. However, conventional CBCT circular scans suffer from cone beam (CB) artifacts that limit the quality and reliability of the reconstructed images due to…
View article: Proceedings of the XX-th international conference on the use of computers in radiation therapy (ICCR)
Proceedings of the XX-th international conference on the use of computers in radiation therapy (ICCR) Open
International audience
View article: Extension of the cone‐beam CT field‐of‐view using two complementary short scans
Extension of the cone‐beam CT field‐of‐view using two complementary short scans Open
Background Robotic C‐arm cone‐beam computed tomography (CBCT) scanners provide fast in‐room imaging in radiotherapy. Their mobility extends beyond performing a gantry rotation, but they might encounter obstructions to their motion which li…
View article: Image quality improvement of a one-step spectral CT reconstruction on a prototype photon-counting scanner
Image quality improvement of a one-step spectral CT reconstruction on a prototype photon-counting scanner Open
Objective . X-ray spectral computed tomography (CT) allows for material decomposition (MD). This study compared a one-step material decomposition MD algorithm with a two-step reconstruction MD algorithm using acquisitions of a prototype CT…
View article: Image reconstruction from truncated fan-beam projections along a circular trajectory using the virtual fan-beam method
Image reconstruction from truncated fan-beam projections along a circular trajectory using the virtual fan-beam method Open
Objective. In this paper, we investigate how the virtual fan-beam (VFB) method can be used to perform mathematically correct 2D reconstruction in a region-of-interest (ROI), using truncated fan-beam projections acquired on a circular scan,…
View article: Systematic Review on Learning-Based Spectral CT
Systematic Review on Learning-Based Spectral CT Open
Spectral computed tomography (CT) has recently emerged as an advanced version of medical CT and significantly improves conventional (single-energy) CT. Spectral CT has two main forms: dual-energy computed tomography (DECT) and photon-count…
View article: Mesure d'incomplétude tomographique pour les géométries de scanner
Mesure d'incomplétude tomographique pour les géométries de scanner Open
National audience
View article: Equal parallel and cone-beam projections: a curious property of D-symmetric object functions
Equal parallel and cone-beam projections: a curious property of D-symmetric object functions Open
In tomographic image reconstruction, the object density function is the unknown quantity whose projections are measured by the scanner. In the three-dimensional case, we define the D-reflection of such a density function as the object obta…
View article: Hybrid geometric calibration in 3D cone-beam with sources on a plane
Hybrid geometric calibration in 3D cone-beam with sources on a plane Open
International audience
View article: The INFN proton computed tomography system for relative stopping power measurements: calibration and verification
The INFN proton computed tomography system for relative stopping power measurements: calibration and verification Open
Objective . This paper describes the procedure to calibrate the three-dimensional (3D) proton stopping power relative to water (SPR) maps measured by the proton computed tomography (pCT) apparatus of the Istituto Nazionale di Fisica Nuclea…
View article: Characterization of the INFN proton CT scanner for cross-calibration of x-ray CT
Characterization of the INFN proton CT scanner for cross-calibration of x-ray CT Open
Objective . The goal of this study was to assess the imaging performances of the pCT system developed in the framework of INFN-funded (Italian National Institute of Nuclear Physics) research projects. The spatial resolution, noise power sp…
View article: Cone-Beam Pair-Wise Data Consistency Conditions in Helical CT
Cone-Beam Pair-Wise Data Consistency Conditions in Helical CT Open
Data consistency conditions (DCC) are mathematical equations characterizing the redundancy in X-ray projections. They have been used to correct inconsistent projections before computed tomography (CT) reconstruction. This article investiga…
View article: A tomographic reconstruction algorithm for cross-sectional imaging of IMRT beams from six projections
A tomographic reconstruction algorithm for cross-sectional imaging of IMRT beams from six projections Open
Objective . Patient-specific Quality Assurance (QA) measurements are of key importance in radiotherapy for safe and efficient treatment delivery and allow early detection of clinically relevant errors. Such QA processes remain challenging …
View article: Scatter correction of 4D cone beam computed tomography to detect dosimetric effects due to anatomical changes in proton therapy for lung cancer
Scatter correction of 4D cone beam computed tomography to detect dosimetric effects due to anatomical changes in proton therapy for lung cancer Open
Background The treatment of moving tumor entities is expected to have superior clinical outcomes, using image‐guided adaptive intensity‐modulated proton therapy (IMPT). Purpose For 21 lung cancer patients, IMPT dose calculations were perfo…
View article: Dosimetric impact of 3D motion-compensated SPECT reconstruction for SIRT planning
Dosimetric impact of 3D motion-compensated SPECT reconstruction for SIRT planning Open