A5001019562- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Breast Cancer Treatment Studies
- Radiation Dose and Imaging
- Advances in Oncology and Radiotherapy
- Advanced X-ray and CT Imaging
- Radiation Effects and Dosimetry
- Radiation Detection and Scintillator Technologies
- Head and Neck Cancer Studies
- Radiomics and Machine Learning in Medical Imaging
- MRI in cancer diagnosis
- Lung Cancer Diagnosis and Treatment
- Brain Metastases and Treatment
- Effects of Radiation Exposure
- Advanced MRI Techniques and Applications
- Management of metastatic bone disease
- Digital Radiography and Breast Imaging
- Cardiac pacing and defibrillation studies
- Prostate Cancer Diagnosis and Treatment
- Cardiac electrophysiology and arrhythmias
- Cardiac Arrhythmias and Treatments
- Vascular Malformations Diagnosis and Treatment
- Meningioma and schwannoma management
- Nonmelanoma Skin Cancer Studies
Centre Oscar Lambret
2015-2025
Institut d'électronique de microélectronique et de nanotechnologie
2023
Université de Lille
2012-2023
Ghent University
2007-2009
Ghent University Hospital
2007-2009
Background: Stereotactic body radiotherapy (SBRT) has been reported as a safe and efficient therapy for treating refractory ventricular tachycardia (VT) despite optimal medical treatment catheter ablation. However, data on the use of SBRT in patients with electrical storm (ES) is lacking. The aim this study was to assess clinical outcomes associated context ES. Methods: This retrospective included who underwent ES from March 2020 2021 one tertiary center (CHU Lille). target volume delineated...
The purpose of this study was the investigation perturbation factors for microionization chambers in small field dosimetry and influence penumbra different spot sizes. To purpose, correlated sampling implemented EGSnrc Monte Carlo (MC) user code cavity: CScavity. CScavity first benchmarked against results literature an NE2571 chamber. An efficiency increase 17 attained calculation a realistic chamber factor water phantom. Calculations have been performed type PinPoint 31006 31016 full...
Manufacturer-integrated quality control (MIQC) systems are often used but not considered standard in codes-of-practice (COP), such as TG148/306 or NCS27, for helical radiotherapy. MIQC can lead to false positive results and generally lacks external validation. Energy (QC) conditions defined COPs, manuals, using various field sizes, phantoms, indicators assuming equal response functions energy changes. This study investigated the accuracy of A clinical treatment unit was detuned terms energy,...
A surface imaging system, Catalyst (C‐Rad), was compared with laser‐based positioning and daily mega voltage computed tomography (MVCT) setup for breast patients nodal involvement treated by helical TomoTherapy. Catalyst‐based performed better than positioning. The respective modalities resulted in a standard deviation (SD), 68% confidence interval (CI) of left–right, craniocaudal, anterior–posterior, roll: 2.4 mm, 2.7 0.9° positioning, 6.1 3.8 4.9 1.1° respectively. MVCT‐based precision is...
We present an application of the industrial Constant-Work-In-Progress (ConWIP) principle to radiotherapy treatments: from Operations Research in practice. Radiotherapy involves a chain preparation steps before treatment. The time periods between patient referral, initial Computed Tomography (CT) scan, and treatment should always be as short possible. This is important order not allow further tumor growth capture correct anatomy for Therefore, high-in-demand limited machine capacity...
Liquid ionization chambers (LICs) offer an interesting tool in the field of small beam dosimetry, allowing better spatial resolution and reduced perturbation effects. However, some aspects remain to be addressed, such as higher recombination effects from materials detector. Our aim was investigate these issues their impact. The first step evaluation Measurements were performed at different SSDs vary dose per pulse, collection efficiency obtained. BEAMnrc code then used model Cyberknife head....
Abstract ORCID: 0000–0001-6019–7309 . In the treatment of breast cancer, intensity-modulated radiation therapy (IMRT) reportedly reduces high-dose irradiation at-risk organs and decreases frequency adverse events (AEs). Comparisons with conventional radiotherapy have shown that IMRT is associated lower frequencies acute late-onset AEs. Here, we extended a prospective, observational, single-center study safety to second investigating center. Patients scheduled for adjuvant after partial or...
The purpose of this investigation was the verification both measured data and quality implementation add-on ModuLeaf miniature multileaf collimator (ML mMLC) into clinical treatment planning system for conformal stereotactic radiosurgery treatment. To end head with ML mMLC modeled in BEAMnrc Monte Carlo (MC) code. 6 MV photon beams used setup were first benchmarked a set measurements. A total transmission 1.13% 10 × cm2 open field dose reproduced BEAMnrc/DOSXYZnrc Correspondence between...
Accelerated partial breast irradiation (APBI) is a new treatment modality aiming to reduce time using hypo fractionation. Compared conventional whole that takes 5 6 weeks, APBI reported induce worse cosmetic outcomes both when three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated (IMRT). These late normal tissue effects may be attributed the dose volume effect because large portion of non-target (NTBTV) receives high dose. In context APBI, non-coplanar beams could spare...
Radiotherapy after breast conserving surgery and mastectomy with node positive disease has been shown to reduce risk of recurrence mortality in the treatment cancer. Intensity-modulated radiation therapy (IMRT) conservative offers several advantages over conventional RT including improved acute late toxicity quality life (QoL). We undertook this study prospectively evaluate (≤90 days last dose radiotherapy) long-term (>90 days) cutaneous, esophageal, fibrosis QoL cancer patients treated by...
Background The choice between different diffusion‐weighted imaging (DWI) techniques is difficult as each comes with tradeoffs for efficient clinical routine and apparent diffusion coefficient (ADC) accuracy. Purpose To quantify signal‐to‐noise‐ratio (SNR) efficiency, ADC accuracy, artifacts, distortions DWI acquisition techniques, coils, scanners. Study Type Phantom, in vivo intraindividual biomarker accuracy independent ratings. Population/Phantoms NIST phantom. 51 Patients: 40 prostate...
The purpose of this investigation was the creation a new protocol allowing more precise dose calculations on megavoltage CT (MVCT) images for tomotherapy, both adaptive and StatRT planning. Daily MVCT offer, next to positioning purposes, possibility daily check Dose use image value density table (IVDT) calculate physical densities from Hounsfield Units (HUs). These measured HUs change over time, leading calculation error. We noticed variations due IVDT changes of: 0.2% during day, up 1.6%...
To evaluate the accuracy/agreement of a three-camera Catalyst Surface Guided Radiation Therapy (SGRT) system on closed-gantry Halcyon for Free-Breathing (FB) and Deep Inspiration Breath Hold (DIBH) breast-only treatments.The SGRT positioning agreement with couch cone-beam computed tomography (CBCT) was evaluated phantom by evaluation 2401 FB 855 DIBH treatment sessions. The using programmable moving support. Dose manual SGRT-assisted beam interruption arc interruption.Geometrical < 0.4 mm....
Conventional workflows for dose calculations require conversions between Hounsfield Units (HU) and the mass or electron density Computed Tomography (CT) images in Treatment Planning System (TPS). These are scanner- mostly kVp-dependent. A representation reconstruction at CT level can potentially simplify workflow. This study aimed to investigate agreement these two methods patients different calculation algorithms.Density conventional HU-density were first established using phantoms with...
The purpose of this study is to obtain a better operational knowledge Stereotactic Body Radiotherapy (SBRT) treatments with CyberKnife(r). An analysis both In-room Times (IRT) and technical interventions 5 years was performed, during which more than 1600 patients were treated for various indications, including liver (21%), lung (29%), intracranial (13%), head neck (11%) prostate (7%). Technical recorded along the time failure, intervention, complexity duration repair. Analyses Time Between...
The purpose of this study was both putting forward a statistically correct model for film calibration and the optimization process. A reliable is needed in order to perform accurate reference dosimetry with radiographic (Gafchromic) film. Sometimes, an ordinary least squares simple linear (in parameters) regression applied dose-optical-density (OD) curve dose as function OD (inverse regression) or sometimes prediction). application fit invalid method because heteroscedasticity data not taken...
This study examined the performance of a bladder volume measuring device, BladderScan (BS) BVI9400. The use BS offers possibility assessing before positioning patient and performing daily image-guided radiotherapy procedure. Patients often cannot lie down entering treatment vault. Therefore, was also assessed in standing position.The repeatability precision first evaluated, which is variability immediate repeated measures with same operator subject. followed by reproducibility subjects...