Search results for "MRgFUS"

showing 10 items of 31 documents

TRANS-CRANIAL MRI-GUIDED FOCUSED ULTRASOUND SURGERY (TCMRGFUS): ITALIAN AND WORLD-FIRST EXPERIENCE AT 1.5 TESLA

2016

Introduction: Transcranial magnetic resonance-guided focused ultrasound surgery (tcMRgFUS) is a promising new technology for the noninvasive treatment of various brain disorders. Here, we present our preliminary results achieved with the first Italian installation of a transcranial MRI-guided focused ultrasound surgery (tcMRgFUS) certified system for functional neurosurgery. Technical issues faced to achieve a safe and effective treatment will be discussed focusing on MR high-resolution live imaging and thermometry sequences optimization. Materials and Methods: Patient enrollment was based on indication for functional neurosurgery and evidence of medication-refractory disease; a detailed me…

Engineeringbusiness.industryTCMRGFUS MRI MDCTBiophysicsGeneral Physics and AstronomySettore MED/37 - NeuroradiologiaGeneral MedicineFocused ultrasound surgerySettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Radiology Nuclear Medicine and imagingNuclear medicinebusinessSettore MED/36 - Diagnostica Per Immagini E RadioterapiaMri guided
researchProduct

High Intensity Focused Ultrasound: opportunità e sfide della chirurgia ablativa non invasiva sotto guida a Risonanza Magnetica

2012

MRgFUS
researchProduct

La Sterilità di coppia Oggi: Nuove prospettive

2013

L'intervento verterà sul ruolo della chirurgia non invasiva mediante ultrasuoni focalizzati ad alta intensità su guida RM per il trattamento dei fibromi uterini

MRgFUS RM HI-FU fibromi uteriniSettore MED/36 - Diagnostica Per Immagini E Radioterapia
researchProduct

MRGFUS: LA TECNICA E LA NOSTRA ESPERIENZA FINO AD OGGI NEL TRATTAMENTO SINTOMATICO PALLIATIVO DELLE METASTASI OSSEE

2012

MRgFUS metastasi ossee
researchProduct

Preliminary experience with a transcranial magnetic resonance-guided focused ultrasound surgery system integrated with a 1.5-T MRI unit in a series o…

2018

OBJECTIVETranscranial magnetic resonance–guided focused ultrasound surgery (tcMRgFUS) is one of the emerging noninvasive technologies for the treatment of neurological disorders such as essential tremor (ET), idiopathic asymmetrical tremor-dominant Parkinson’s disease (PD), and neuropathic pain. In this clinical series the authors present the preliminary results achieved with the world’s first tcMRgFUS system integrated with a 1.5-T MRI unit.METHODSThe authors describe the results of tcMRgFUS in a sample of patients with ET and with PD who underwent the procedure during the period from January 2015 to September 2017. A monolateral ventralis intermedius nucleus (VIM) thalamic ablation was pe…

MaleParkinson's diseaseMovement disordershigh-intensity focused ultrasound ablationIntraoperative Neurophysiological Monitoringmedicine.medical_treatmentinterventional030218 nuclear medicine & medical imagingMagnetic resonance guided focused ultrasound surgery0302 clinical medicineThalamusEssential tremorSettore MED/27 - NeurochirurgiaUltrasoundSettore MED/37 - NeuroradiologiaParkinson DiseaseGeneral MedicineMiddle AgedAblationMagnetic Resonance ImagingTreatment OutcomeNeuropathic painBBB = blood-brain barrier; ET = essential tremor; FRFSE = fast recalled FSE; FSE = fast spin echo; FSPGR = fast spoiled gradient echo; FTM = Fahn-Tolosa-Marin; HI-FU = high-intensity focused ultrasound; MRI; MRgFUS; MS = multiple sclerosis; PD = Parkinson’s disease; Parkinson’s disease; QUEST = Quality of Life in Essential Tremor; SWAN = susceptibility-weighted angiography; UPDRS = Unified Parkinson’s Disease Rating Scale; VIM = ventralis intermedius nucleus; brain; essential tremor; high-intensity focused ultrasound ablation; interventional; magnetic resonance–guided focused ultrasound surgery; stereotactic technique; tcMRgFUS = transcranial magnetic resonance–guided focused ultrasound surgerySettore MED/26 - NeurologiaFemaleRadiologymedicine.symptombrain; essential tremor; high-intensity focused ultrasound ablation; interventional; magnetic resonance-guided focused ultrasound surgery; mrgfus; mri; parkinson's disease; stereotactic techniqueMRIAdultmedicine.medical_specialtybrainEssential Tremormagnetic resonance–guided focused ultrasound surgery03 medical and health sciencesmedicineHumansmagnetic resonance-guided focused ultrasound surgeryUltrasonography InterventionalAgedThalamotomybusiness.industryMRgFUSmedicine.diseasestereotactic techniqueparkinson's diseaseParkinson’s diseaseSurgeryNeurology (clinical)businessSettore MED/36 - Diagnostica Per Immagini E Radioterapia030217 neurology & neurosurgeryFollow-Up StudiesNeurosurgical focus
researchProduct

Focused Ultrasound in Neuroscience. State of the Art and Future Perspectives

2021

Transcranial MR-guided Focused ultrasound (tcMRgFUS) is a surgical procedure that adopts focused ultrasounds beam towards a specific therapeutic target through the intact skull. The convergence of focused ultrasound beams onto the target produces tissue effects through released energy. Regarding neurosurgical applications, tcMRgFUS has been successfully adopted as a non-invasive procedure for ablative purposes such as thalamotomy, pallidotomy, and subthalamotomy for movement disorders. Several studies confirmed the effectiveness of tcMRgFUS in the treatment of several neurological conditions, ranging from motor disorders to psychiatric disorders. Moreover, using low-frequencies tcMRgFUS sys…

OpinionComputer scienceNeurodegenerative diseaseFocused ultrasoundlcsh:RC321-57103 medical and health sciences0302 clinical medicineneurodegenerative diseaseslcsh:Neurosciences. Biological psychiatry. Neuropsychiatry030304 developmental biologyBlood-brain barriertcMRgFUSLIFU0303 health sciencesEpilepsySettore MED/27 - NeurochirurgiaGeneral NeuroscienceSettore MED/37 - NeuroradiologiaPsychiatric disorderHIFUpsychiatric disordersfocused ultrasoundSettore MED/26 - NeurologiaSettore MED/36 - Diagnostica Per Immagini E RadioterapiaNeuroscienceneuro-oncology030217 neurology & neurosurgeryBrain Sciences
researchProduct

A Computational Study on Temperature Variations in MRgFUS Treatments Using PRF Thermometry Techniques and Optical Probes

2021

Structural and metabolic imaging are fundamental for diagnosis, treatment and follow-up in oncology. Beyond the well-established diagnostic imaging applications, ultrasounds are currently emerging in the clinical practice as a noninvasive technology for therapy. Indeed, the sound waves can be used to increase the temperature inside the target solid tumors, leading to apoptosis or necrosis of neoplastic tissues. The Magnetic resonance-guided focused ultrasound surgery (MRgFUS) technology represents a valid application of this ultrasound property, mainly used in oncology and neurology. In this paper

Optical fiberMaterials scienceInterferometric optical fibers MRgFUS Proton resonance frequency shift RBF neural networks Referenceless thermometry Temperature variationslcsh:Computer applications to medicine. Medical informaticsImaging phantomlcsh:QA75.5-76.95Article030218 nuclear medicine & medical imaginglaw.invention03 medical and health sciencesinterferometric optical fibers0302 clinical medicinelawMedical imagingRadiology Nuclear Medicine and imaginglcsh:PhotographyElectrical and Electronic EngineeringReferenceless ther-mometryProton resonance frequencytemperature variationsbusiness.industryMRgFUSUltrasoundproton resonance frequency shiftFocused ultrasound surgerylcsh:TR1-1050Computer Graphics and Computer-Aided DesignRBF neural networksClinical PracticeInterferometryreferenceless thermometrylcsh:R858-859.7Computer Vision and Pattern Recognitionlcsh:Electronic computers. Computer sciencebusiness030217 neurology & neurosurgeryInterferometric optical fibers; MRgFUS; Proton resonance frequency shift; RBF neural networks; Referenceless ther-mometry; Temperature variationsBiomedical engineeringJournal of Imaging
researchProduct

MRgFUS Uterine Fibroids treatments in Sicily: Preliminary Results and comparison of a Semi-Automatic and manual contouring

2013

Background: Traditional surgery for uterine fibroids treatments (e.g. myomectomy, hysterectomy) offers very invasive therapeutic approaches, which not always preserve reproductive potential of the woman. MRgFUS (MR guided Focused UltraSound) is a new and non-invasive technique for uterine fibroids treatment, not requiring hospitalization and recovery time [1]. On June 2011 and July 2012 the first treatments were started at HSR-Giglio Hospital in Cefalù and at University Hospital (DIBIMEF) in Palermo. An initial assessment of MRgFUS treatment was made by computing the thermally-ablated volume of uterine fibroid. This volume was evaluated considering the NPV (Non Perfused Volume) on a post-t…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniMRgFUS uterine fibroids segmentationSettore MED/36 - Diagnostica Per Immagini E Radioterapia
researchProduct

Referenceless thermometry using radial basis function interpolation

2014

The Proton Resonance Frequency (PRF) shift provide a method for temperature change measurements during thermotherapy. Conventional PRF thermometry works subtracting one or multiple baseline images. The method leads to artifacts caused by tissue motion and frequency drift. Various works estimating the background phase from each acquired image phase are present in literature. These algorithms are called “referenceless” because they don’t require any subtraction of baseline images for calculating temperature increment. Conventional referenceless methods estimate baseline image by fitting the background phase outside the heated region through a polynomial approach. In this work a background pha…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniMaterials sciencebusiness.industryRadial basis function interpolationThermometry ultrasound thermal ablation referenceless methods RBF interpolation MRgFUSComputer visionArtificial intelligencebusinessComputational physics2014 World Symposium on Computer Applications & Research (WSCAR)
researchProduct

Radial Basis Function Interpolation for Referenceless Thermometry Enhancement

2015

MRgFUS (Magnetic Resonance guided Focused UltraSound) is a new and non-invasive technique to treat different diseases in the oncology field, that uses Focused Ultrasound (FUS) to induce necrosis in the lesion. Temperature change measurements during ultrasound thermo-therapies can be performed through magnetic resonance monitoring by using Proton Resonance Frequency (PRF) thermometry. It measures the phase variation resulting from the temperature-dependent changes in resonance frequency by subtracting one phase baseline image from actual phase. Referenceless thermometry aims to re-duce artefacts caused by tissue motion and frequency drift, fitting the back-ground phase outside the heated reg…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniProton resonance frequencyMaterials sciencemedicine.diagnostic_testbusiness.industryFrequency driftUltrasoundPhase (waves)Magnetic resonance imagingRadial Basis Function Interpolation Referenceless Thermometry Artificial Neural Network MRgFUS.Radial basis function interpolationmedicineRadial basis functionbusinessBiomedical engineeringInterpolation
researchProduct