Xavier Geets

Summary

Country: Belgium

Publications

  1. ncbi Adaptive biological image-guided IMRT with anatomic and functional imaging in pharyngo-laryngeal tumors: impact on target volume delineation and dose distribution using helical tomotherapy
    Xavier Geets
    Department of Radiation Oncology, Universite Catholique de Louvain, Brussels, Belgium
    Radiother Oncol 85:105-15. 2007
  2. ncbi A gradient-based method for segmenting FDG-PET images: methodology and validation
    Xavier Geets
    Department of Radiation Oncology, Center for Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, St Luc University Hospital, 1200, Brussels, Belgium
    Eur J Nucl Med Mol Imaging 34:1427-38. 2007
  3. ncbi Impact of the type of imaging modality on target volumes delineation and dose distribution in pharyngo-laryngeal squamous cell carcinoma: comparison between pre- and per-treatment studies
    Xavier Geets
    Department of Radiation Oncology and Head and Neck Oncology Program, , Brussels, Belgium
    Radiother Oncol 78:291-7. 2006
  4. ncbi Evaluation of the radiobiological impact of anatomic modifications during radiation therapy for head and neck cancer: can we simply summate the dose?
    Jonathan Orban de Xivry
    ICTEAM Institute, Universite Catholique de Louvain, Louvain la Neuve, Belgium
    Radiother Oncol 96:131-8. 2010
  5. ncbi PET-based treatment planning in radiotherapy: a new standard?
    Vincent Gregoire
    Radiation Oncology Department, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    J Nucl Med 48:68S-77S. 2007
  6. ncbi Adaptive radiotherapy of head and neck cancer
    Pierre Castadot
    Department of Radiation Oncology, Center for Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    Semin Radiat Oncol 20:84-93. 2010
  7. ncbi Comparison of 12 deformable registration strategies in adaptive radiation therapy for the treatment of head and neck tumors
    Pierre Castadot
    Department of Radiation Oncology, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    Radiother Oncol 89:1-12. 2008
  8. ncbi Adaptive functional image-guided IMRT in pharyngo-laryngeal squamous cell carcinoma: is the gain in dose distribution worth the effort?
    Pierre Castadot
    Department of Radiation Oncology, Universite Catholique de Louvain, Brussels, Belgium
    Radiother Oncol 101:343-50. 2011
  9. ncbi Is PET-based treatment planning the new standard in modern radiotherapy? The head and neck paradigm
    Vincent Gregoire
    Department of Radiation Oncology and Center for Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    Semin Radiat Oncol 16:232-8. 2006
  10. ncbi Gradient-based delineation of the primary GTV on FDG-PET in non-small cell lung cancer: a comparison with threshold-based approaches, CT and surgical specimens
    Marie Wanet
    Department of Radiation Oncology, Center of Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, Brussels, Belgium
    Radiother Oncol 98:117-25. 2011

Detail Information

Publications18

  1. ncbi Adaptive biological image-guided IMRT with anatomic and functional imaging in pharyngo-laryngeal tumors: impact on target volume delineation and dose distribution using helical tomotherapy
    Xavier Geets
    Department of Radiation Oncology, Universite Catholique de Louvain, Brussels, Belgium
    Radiother Oncol 85:105-15. 2007
    ....
  2. ncbi A gradient-based method for segmenting FDG-PET images: methodology and validation
    Xavier Geets
    Department of Radiation Oncology, Center for Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, St Luc University Hospital, 1200, Brussels, Belgium
    Eur J Nucl Med Mol Imaging 34:1427-38. 2007
    ..A new gradient-based method for segmenting FDG-PET images is described and validated...
  3. ncbi Impact of the type of imaging modality on target volumes delineation and dose distribution in pharyngo-laryngeal squamous cell carcinoma: comparison between pre- and per-treatment studies
    Xavier Geets
    Department of Radiation Oncology and Head and Neck Oncology Program, , Brussels, Belgium
    Radiother Oncol 78:291-7. 2006
    ..CONCLUSIONS: The use of pre-treatment FDG-PET and per-treatment CT or MRI significantly impacts on the delineation of TVs in pharyngo-laryngeal SCC, translating into more normal tissue sparing after conformal radiotherapy planning...
  4. ncbi Evaluation of the radiobiological impact of anatomic modifications during radiation therapy for head and neck cancer: can we simply summate the dose?
    Jonathan Orban de Xivry
    ICTEAM Institute, Universite Catholique de Louvain, Louvain la Neuve, Belgium
    Radiother Oncol 96:131-8. 2010
    ..This study evaluates practically if the accumulation of all of these registered dose fractions must take radiobiology into account in a classical clinical setting...
  5. ncbi PET-based treatment planning in radiotherapy: a new standard?
    Vincent Gregoire
    Radiation Oncology Department, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    J Nucl Med 48:68S-77S. 2007
    ..This review discusses how PET/CT might modify the current state of the art of radiotherapy planning...
  6. ncbi Adaptive radiotherapy of head and neck cancer
    Pierre Castadot
    Department of Radiation Oncology, Center for Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    Semin Radiat Oncol 20:84-93. 2010
    ..This article reviews the causes and discusses potential solutions to circumvent the discrepancies between the planned dose and the actual dose received by patients treated for H&N malignancies...
  7. ncbi Comparison of 12 deformable registration strategies in adaptive radiation therapy for the treatment of head and neck tumors
    Pierre Castadot
    Department of Radiation Oncology, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    Radiother Oncol 89:1-12. 2008
    ..It however requires the use of specific deformable registration (DR) algorithms that requires proper validation on a clinical material...
  8. ncbi Adaptive functional image-guided IMRT in pharyngo-laryngeal squamous cell carcinoma: is the gain in dose distribution worth the effort?
    Pierre Castadot
    Department of Radiation Oncology, Universite Catholique de Louvain, Brussels, Belgium
    Radiother Oncol 101:343-50. 2011
    ....
  9. ncbi Is PET-based treatment planning the new standard in modern radiotherapy? The head and neck paradigm
    Vincent Gregoire
    Department of Radiation Oncology and Center for Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, St Luc University Hospital, Brussels, Belgium
    Semin Radiat Oncol 16:232-8. 2006
    ..Therefore, although integration of PET images into the radiotherapy process seems promising, for the moment it should remain in the research arena...
  10. ncbi Gradient-based delineation of the primary GTV on FDG-PET in non-small cell lung cancer: a comparison with threshold-based approaches, CT and surgical specimens
    Marie Wanet
    Department of Radiation Oncology, Center of Molecular Imaging and Experimental Radiotherapy, Universite Catholique de Louvain, Brussels, Belgium
    Radiother Oncol 98:117-25. 2011
    ..The aim of this study was to validate a gradient-based segmentation method for GTV delineation on FDG-PET in NSCLC through surgical specimen, in comparison with threshold-based approaches and CT...
  11. ncbi Inter-observer variability in the delineation of pharyngo-laryngeal tumor, parotid glands and cervical spinal cord: comparison between CT-scan and MRI
    Xavier Geets
    Department of Radiation Oncology, , St-Luc University Hospital, Brussels, Belgium
    Radiother Oncol 77:25-31. 2005
    ..001) and between modalities (P<0.001) (CT: 34.8, 29.4, and 26.8 ml; MRI: 30.6, 27.9 and 20.4 ml). Similar results were obtained for mean spinal cord volumes (CT: 10.7, 10.6, and 9.5 ml; MRI: 8.7, 8.5 and 8.2 ml; P=0.05)...
  12. ncbi Assessment by a deformable registration method of the volumetric and positional changes of target volumes and organs at risk in pharyngo-laryngeal tumors treated with concomitant chemo-radiation
    Pierre Castadot
    Department of Radiation Oncology, Center for Molecular Imaging and Experimental Radiotherapy IMRE, Universite Catholique de Louvain, Belgium
    Radiother Oncol 95:209-17. 2010
    ..Anatomic (CT) and functional (FDG-PET) imaging were used for the delineation of the GTVs...
  13. ncbi Efficient multi-modal dense field non-rigid registration: alignment of histological and section images
    Aloys du Bois d'Aische
    Communications and Remote Sensing Laboratory, Universite Catholique de Louvain, B 1348 Louvain la Neuve, Belgium
    Med Image Anal 9:538-46. 2005
    ..A further acceleration in speed without cost of accuracy is achieved by using an adaptive mesh refinement strategy...
  14. ncbi Selection and delineation of target volumes in head and neck tumors: beyond ICRU definition
    Vincent Gregoire
    Radiation Oncology Department, Laboratory of Radiobiology, Universite Catholique de Louvain, St Luc University Hospital, Bruxelles, Belgium
    Rays 28:217-24. 2003
    ..The present manuscript intends to review available data on selection and delineation of target volumes for primary tumor and neck nodes. Setup uncertainties and how they influence the PTV delineation are also discussed...
  15. ncbi Lung cancer: Morphological and functional approach to screening, staging and treatment planning
    Emmanuel Coche
    Department of Medical Imaging, Universite Catholique de Louvain, Cliniques Universitaires St Luc, Brussels, Belgium
    Future Oncol 6:367-80. 2010
    ..For treatment planning, flurodeoxglucose PET-CT is playing an increasing role in radiotherapy planning at the target selection and definition steps...
  16. ncbi Edge-preserving filtering of images with low photon counts
    John A Lee
    Molecular Imaging and Experimental Radiotherapy Unit IMRE, Universite Catholique de Louvain, Brussels Belgium
    IEEE Trans Pattern Anal Mach Intell 30:1014-27. 2008
    ..Experiments show that ensuring the photometry invariance leads to comparable denoising performances in terms of the root mean square error computed on the signal...
  17. ncbi Role of 11-C-methionine positron emission tomography for the delineation of the tumor volume in pharyngo-laryngeal squamous cell carcinoma: comparison with FDG-PET and CT
    Xavier Geets
    Department of Radiotherapy, Cliniques Universitaires Saint-Luc, UCL Medical School, Avenue Hippocrate 10, B-1200 Brussels, Belgium
    Radiother Oncol 71:267-73. 2004
    ..On the contrary, MET-PET does not have any additional value since MET volumes are not different from CT volumes, probably because of the high uptake of MET by the normal mucosa and salivary glands surrounding the tumor...
  18. ncbi Comparison of CT- and FDG-PET-defined GT: in regard to Paulino et al. (Int J Radiat Oncol Biol Phys 2005;61:1385-1392)
    Vincent Gregoire
    Int J Radiat Oncol Biol Phys 63:308-9; author reply 309. 2005