Renaud de Crevoisier
University of Rennes
CancerInternal medicineRadiologyUrologySurgeryMagnetic resonance imagingOncologyArtificial intelligenceImage registrationPattern recognitionProstateProstate cancerRectumPopulationNuclear medicineComputer visionComputer scienceRadiation therapyMedicineImage-guided radiation therapy
Publications 137
#1Dorota Duda (Bialystok University of Technology)H-Index: 7
#2Marek Kretowski (Bialystok University of Technology)H-Index: 16
Last. Johanne Bezy-Wendling (University of Rennes)H-Index: 12
view all 5 authors...
In the work, a (semi)automatic multi-image texture analysis is applied to the characterization of prostatic tissues from Magnetic Resonance Images (MRI). The method consists in a simultaneous analysis of several images, each acquired under different conditions, but representing the same part of the organ. First, the texture of each image is characterized independently of the others, using the same techniques. Afterwards, the feature values corresponding to the different acquisition conditions ar...
8 CitationsSource
#1Oscar Acosta (University of Rennes)H-Index: 21
#2Jason Dowling (CSIRO: Commonwealth Scientific and Industrial Research Organisation)H-Index: 18
Last. Pascal Haigron (University of Rennes)H-Index: 21
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In prostate cancer radiotherapy, the accurate identification of the prostate and organs at risk in planning computer tomography (CT) images is an important part of the therapy planning and optimization. Manually contouring these organs can be a time-consuming process and subject to intra- and inter-expert variability. Automatic identification of organ boundaries from these images is challenging due to the poor soft tissue contrast. Atlas-based approaches may provide a priori structural informati...
19 CitationsSource
#1Pengcheng Zhang (SEU: Southeast University)H-Index: 2
#2Huazhong Shu (SEU: Southeast University)H-Index: 34
Last. Renaud de Crevoisier (French Institute of Health and Medical Research)H-Index: 28
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The pencil beam method has been frequently used for dose calculations in intensity modulated radiation therapy (IMRT). In this work, a new pencil model is proposed for photon dose calculations in the heterogeneous media. To avoid the bias caused by oblique kernels and reduce the computation time, the dose distributions are calculated in a spherical coordinate system with pencil kernels of the different source to surface distance (SSD). To improve the accuracy of the dose calculations, the scalin...
#1Caroline Lafond (University of Rennes)H-Index: 15
#2Enrique ChajonH-Index: 7
Last. J.-P. Manens (University of Rennes)H-Index: 7
view all 9 authors...
This dosimetric study investigated the impact of multileaf collimators (MLC) leaf width in volumetric-modulated arc therapy (VMAT) for head and neck cancers (HNC), either with a “standard” simultaneously integrated boost technique (S-SIB) or with a “dose painting” SIB technique (DP-SIB). HNC patients were planned either with an S-SIB comprising three dose levels, from 56 to 70 Gy (16 patients), or with a DP-SIB comprising five dose levels, from 56 to 84 Gy (8 patients), in 35 fractions. Two VMAT...
13 CitationsSource
Sep 22, 2013 in MICCAI (Medical Image Computing and Computer-Assisted Intervention)
#1Juan David Ospina (National University of Colombia)H-Index: 8
#2Frederic Commandeur (University of Rennes)H-Index: 13
Last. Oscar Acosta (University of Rennes)H-Index: 21
view all 9 authors...
In prostate cancer radiotherapy the association between the dose distribution and the occurrence of undesirable side-effects is yet to be revealed. In this work a method to perform population analysis by comparing the dose distributions is proposed. The method is a tensor-based approach that generalises an existing method for 2D images and allows for the highlighting of over irradiated zones correlated with rectal bleeding after prostate cancer radiotherapy. Thus, the aim is to contribute to the...
3 CitationsSource
#1Pengcheng ZhangH-Index: 2
#2Renaud de Crevoisier (University of Rennes)H-Index: 28
Last. Huazhong Shu (SEU: Southeast University)H-Index: 34
view all 7 authors...
This work addresses random geometrical uncertainties that are intrinsically observed in radiation therapy by means of a new deconvolution method combining a series expansion and a Butterworth filter. The method efficiently suppresses high-frequency components by discarding the higher order terms of the series expansion and then filtering out deviations on the field edges. An additional approximation is made in order to set the fluence values outside the field to zero in the robust profiles. This...
1 CitationsSource
#1Romain MathieuH-Index: 24
#2Juan David Ospina Arango (National University of Colombia)H-Index: 5
Last. Renaud de Crevoisier (French Institute of Health and Medical Research)H-Index: 28
view all 17 authors...
OBJECTIVE: To analyze late urinary toxicity after prostate cancer radiotherapy (RT): symptom description and identification of patient characteristics or treatment parameters allowing for the generation of nomograms. METHODS: Nine hundred and sixty-five patients underwent RT in seventeen French centers for localized prostate cancer. Median total dose was 70 Gy (range, 65-80 Gy), using different fractionations (2 or 2.5 Gy/day) and techniques. Late urinary toxicity and the corresponding symptoms ...
23 CitationsSource
#1Enrique ChajonH-Index: 13
#2Caroline Lafond (University of Rennes)H-Index: 15
Last. Renaud de Crevoisier (University of Rennes)H-Index: 28
view all 11 authors...
Background The objective was to analyze locoregional (LR) failure patterns in patients with head-and-neck cancer (HNC) treated using intensity-modulated radiotherapy (IMRT) with whole salivary gland-sparing: parotid (PG), submandibular (SMG), and accessory salivary glands represented by the oral cavity (OC).
27 CitationsSource
#1J.-P. Couapel (University of Rennes)H-Index: 5
#2Lotfi Senhadji (University of Rennes)H-Index: 27
Last. Karim Bensalah (University of Rennes)H-Index: 4
view all 7 authors...
UNLABELLED: WHAT'S KNOWN ON THE SUBJECT? AND WHAT DOES THE STUDY ADD?: There is little known about optical spectroscopy techniques ability to evaluate renal tumours. This study shows for the first time the ability of Raman and optical reflectance spectroscopy to distinguish benign and malignant renal tumours in an ex vivo environment. We plan to develop this optical assistance in the operating room in the near future. OBJECTIVE: To evaluate the ability of Raman spectroscopy (RS) and optical refl...
20 CitationsSource
Apr 7, 2013 in ISBI (International Symposium on Biomedical Imaging)
#1Frederic Commandeur (French Institute of Health and Medical Research)H-Index: 13
#1Frederic Commandeur (French Institute of Health and Medical Research)H-Index: 6
Last. Renaud de Crevoisier (French Institute of Health and Medical Research)H-Index: 28
view all 6 authors...
Although accurate delineations of the prostate on computed tomography (CT) images are required for the planning in prostate cancer radiotherapy, these images do not provide the reliable soft tissue contrast. On the contrary, magnetic resonance (MR) images offer the possibility to better delineate both the tumor and healthy prostate tissues. Because CT is still used during the planning, MRICT image registration is an essential step to improve the targeting. In this paper, we propose a new framewo...
1 CitationsSource