Search results for " MRgFUS."

showing 7 items of 7 documents

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
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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
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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)
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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
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Combining split-and-merge and multi-seed region growing algorithms for uterine fibroid segmentation in MRgFUS treatments

2016

Uterine fibroids are benign tumors that can affect female patients during reproductive years. Magnetic resonance-guided focused ultrasound (MRgFUS) represents a noninvasive approach that uses thermal ablation principles to treat symptomatic fibroids. During traditional treatment planning, uterus, fibroids, and surrounding organs at risk must be manually marked on MR images by an operator. After treatment, an operator must segment, again manually, treated areas to evaluate the non-perfused volume (NPV) inside the fibroids. Both pre- and post-treatment procedures are time-consuming and operator-dependent. This paper presents a novel method, based on an advanced direct region detection model, …

SpeedupUterine fibroidsImage ProcessingBiomedical EngineeringThermal ablation02 engineering and technologyMagnetic Resonance Imaging InterventionalFocused ultrasound030218 nuclear medicine & medical imaging03 medical and health sciencesComputer-Assisted0302 clinical medicineImage Processing Computer-Assisted0202 electrical engineering electronic engineering information engineeringmedicineHumansSegmentationRadiation treatment planningSplit-and-merge segmentationSettore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniMRgFUS treatmentsInterventionalLeiomyomaMulti-seed adaptive region growingbusiness.industrymedicine.diseaseMagnetic Resonance Imagingfemale genital diseases and pregnancy complicationsComputer Science ApplicationsAutomatic segmentation MRgFUS treatments Multi-seed adaptive region growing Split-and-merge segmentation Uterine fibroids Algorithms Female High-Intensity Focused Ultrasound Ablation Humans Leiomyoma Magnetic Resonance Imaging Magnetic Resonance Imaging Interventional Image Processing Computer-AssistedMRgFUS treatmentRegion growingAutomatic segmentation; MRgFUS treatments; Multi-seed adaptive region growing; Split-and-merge segmentation; Uterine fibroids; Algorithms; Female; High-Intensity Focused Ultrasound Ablation; Humans; Leiomyoma; Magnetic Resonance Imaging; Magnetic Resonance Imaging Interventional; Image Processing Computer-AssistedHigh-Intensity Focused Ultrasound AblationFemale020201 artificial intelligence & image processingAutomatic segmentationbusinessMerge (version control)AlgorithmAlgorithmsUterine fibroidsMedical & Biological Engineering & Computing
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Terapia dei fibromi con ultrasuoni e RMN (FUS)

2013

Titolo corso: “Attualità in ginecologia e ostetricia 2013” Sede: Splendid Hotel La Torre - Palermo (PA) Data: 8 Marzo 2013 Intervento: Terapia dei fibromi con ultrasuoni e RMN (FUS) Relatore: Dott. Cesare Gagliardo

fibromi uterini RM HI-FU MRgFUSSettore MED/36 - Diagnostica Per Immagini E Radioterapia
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A fully automatic 2D segmentation method for uterine fibroid in MRgFUS treatment evaluation

2015

PurposeMagnetic Resonance guided Focused UltraSound (MRgFUS) represents a non-invasive surgical approach that uses thermal ablation to treat uterine fibroids. After the MRgFUS treatment, an operator must manually segment the treated fibroid areas to evaluate the NonPerfused Volume (NPV). This manual approach is operator-dependent, introducing issues of result reproducibility, which could lead to errors in the subsequent follow-up phase. Moreover, manual segmentation is time-consuming, and can have a negative impact on the optimization of both machine-time and operator-time. MethodTo address these issues, in this paper a novel fully automatic method based on the unsupervised Fuzzy C-Means cl…

medicine.medical_specialtyDatabases FactualUterine fibroidsComputer scienceAdaptive thresholdingImage ProcessingAdaptive thresholding; Automatic segmentation; Fuzzy C-Means clustering; MRgFUS treatment; Uterine fibroids; Female; Humans; Image Processing Computer-Assisted; Leiomyoma; Radiography; Algorithms; Databases Factual; Magnetic Resonance Imaging; Ultrasonography InterventionalHealth InformaticsFuzzy logicDatabasesComputer-AssistedImage Processing Computer-AssistedmedicineHumansSegmentationCluster analysisFactualUltrasonography InterventionalUltrasonographySettore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniInterventionalLeiomyomaPixelbusiness.industryPattern recognitionmedicine.diseaseMagnetic Resonance ImagingFuzzy C-Means clusteringComputer Science ApplicationsSurgeryRadiographyTreatment evaluationMRgFUS treatmentFully automaticFemaleManual segmentationArtificial intelligenceAutomatic segmentationAdaptive thresholding Automatic segmentation Fuzzy C-Means clustering MRgFUS treatment Uterine fibroidsbusinessAlgorithmsUterine fibroids
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