Search results for "Ultrasound surgery"

showing 10 items of 13 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
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Computer-Assisted Approaches for Uterine Fibroid Segmentation in MRgFUS Treatments: Quantitative Evaluation and Clinical Feasibility Analysis

2019

Nowadays, uterine fibroids can be treated using Magnetic Resonance guided Focused Ultrasound Surgery (MRgFUS), which is a non-invasive therapy exploiting thermal ablation. In order to measure the Non-Perfused Volume (NPV) for treatment response assessment, the ablated fibroid areas (i.e., Region of Treatment, ROT) are manually contoured by a radiologist. The current operator-dependent methodology could affect the subsequent follow-up phases, due to the lack of result repeatability. In addition, this fully manual procedure is time-consuming, considerably increasing execution times. These critical issues can be addressed only by means of accurate and efficient automated Pattern Recognition ap…

ING-INF/06 - BIOINGEGNERIA ELETTRONICA E INFORMATICAmedicine.medical_specialtyTreatment responseUterine fibroidsComputer scienceMagnetic Resonance guided Focused Ultrasound Surgery0206 medical engineeringThermal ablation02 engineering and technologyClinical feasibility; Computer-assisted medical image segmentation; Magnetic resonance guided focused ultrasound surgery; Non-Perfused volume assessment; Pattern recognition; Uterine fibroidsPattern RecognitionClinical feasibilityING-INF/05 - SISTEMI DI ELABORAZIONE DELLE INFORMAZIONI030218 nuclear medicine & medical imagingMagnetic resonance guided focused ultrasound surgeryMagnetic Resonance guided Focused Ultrasound Surgery Uterine fibroids03 medical and health sciences0302 clinical medicineNon-Perfused Volume assessmentmedicineUterine fibroidSegmentationUterine fibroids Indexed keywordsSettore INF/01 - InformaticaComputer Science (all)INF/01 - INFORMATICAmedicine.disease020601 biomedical engineeringComputer-assisted medical image segmentation; Pattern Recognition; Magnetic Resonance guided Focused Ultrasound Surgery Uterine fibroids; Non-Perfused Volume assessment; Clinical feasibility;Decision Sciences (all)Pattern recognition (psychology)RadiologyUterine fibroidsComputer-assisted medical image segmentation
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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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Is there still a role for lesioning in functional neurosurgery? Preliminary Italian (and world-first) experience with a trans-cranial MRI-guided focu…

2015

Malemedicine.medical_specialtyDeep Brain StimulationEssential TremorFunctional neurosurgeryNeurosurgical Procedures030218 nuclear medicine & medical imaging03 medical and health sciences0302 clinical medicinemedicineHumansUltrasonographybusiness.industryBrainParkinson DiseaseMiddle AgedFocused ultrasound surgeryMagnetic Resonance ImagingItalySurgery Computer-AssistedSurgeryNeurology (clinical)RadiologyTomography X-Ray Computedbusiness030217 neurology & neurosurgeryMri guidedJournal of Neurosurgical Sciences
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Transcranial magnetic resonance-guided focused ultrasound surgery at 1.5T: a technical note.

2019

Magnetic resonance-guided focused ultrasound is one of the emerging non-invasive technologies offering both image guidance and thermal monitoring. In recent years transcranial application of this technology is starting to impact heavily the neuroscience field. We present here the imaging protocol and the technological methods successfully used with a transcranial magnetic resonance-guided focused ultrasound system certified for clinical treatments of functional neurological disorders, integrated for the first time with a 1.5T magnetic resonance scanner. Compared to the body radiofrequency coil (the one commonly used with transcranial magnetic resonance-guided focused ultrasound system integ…

Maleminimally invasive surgical procedureComputer sciencebraininterventionalSignal-To-Noise RatioNeurosurgical ProcedureMagnetic Resonance Imaging InterventionalFocused ultrasoundNeurosurgical Procedures030218 nuclear medicine & medical imagingMagnetic resonance guided focused ultrasound surgery03 medical and health sciences0302 clinical medicinemedicinemagnetic resonance imagingHumansGeneral NeuroradiologyRadiology Nuclear Medicine and imagingImage guidanceAgedmedicine.diagnostic_testtomography X-ray computedMagnetic resonance scannerinterventional magnetic resonance imagingSettore MED/37 - NeuroradiologiaMagnetic resonance imagingTechnical noteGeneral MedicineSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)minimally invasive surgical proceduresstereotactic techniqueTreatment Outcomebrain; high-intensity focused ultrasound ablation; interventional magnetic resonance imaging; minimally invasive surgical procedures; stereotactic techniques; aged; female; high-intensity focused ultrasound ablation; humans; male; neurosurgical procedures; signal-to-noise ratio; tomography X-ray computed; treatment outcome; magnetic resonance imaging; interventionalElectromagnetic coilstereotactic techniquesHigh-Intensity Focused Ultrasound AblationFemaleNeurology (clinical)Settore MED/36 - Diagnostica Per Immagini E RadioterapiaTomography X-Ray Computed030217 neurology & neurosurgeryHumanRadiofrequency coilBiomedical engineeringThe neuroradiology journal
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Hydrodynamic ultrasonic maxillary sinus lift : review of a new technique and presentation of a clinical case

2010

Objectives: Placing implants in the posterior maxillary area has the drawback of working with scarce, poor quality bone in a significant percentage of cases. Numerous advanced surgical techniques have been developed to overcome the difficulties associated with these limitations. Subsequent to reports on the elevation of the maxillary sinus through the lateral approach, there were reports on the use of the crestal approach, which is less aggressive but requires a minimal amount of bone. Furthermore, it is more sensitive to operator technique, as the integrity of the sinus membrane is checked indirectly. The aim of this paper is to review the technical literature on minimally invasive sinus l…

Maxillary sinusSinus liftDentistryUltrasonic Surgical ProceduresSinus liftMinimally invasive surgerymedicineHumansMinimally Invasive Surgical ProceduresGeneral DentistryPiezosurgerySinus (anatomy)business.industryLift (data mining)UltrasoundReview-ArticleSurgical techniqueAlveolar Ridge AugmentationEquipment DesignMaxillary SinusMiddle Aged:CIENCIAS MÉDICAS [UNESCO]Ultrasound surgerymedicine.anatomical_structureOtorhinolaryngologyUNESCO::CIENCIAS MÉDICASHydrodynamicsFemaleSurgeryUltrasonic sensorOral SurgeryPresentation (obstetrics)business
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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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246. Analysis of signal-to-noise ratio for a 2-channels coil developed to enable transcranial Magnetic Resonance-guided Focused Ultrasound Surgery (t…

2018

Abstract Purpose In recent years trans-cranial Magnetic Resonance-guided Focused Ultrasound Surgery (tcMRgFUS) treatments have aroused large scientific and medical interest [1] . Usually, tcMRgFUS systems are integrated with 3 T systems which allow the use of the body RF coil for both real time imaging and MR-thermometry. At University Hospital of Palermo there is the world-first installation of a tcMRgFUS system integrated with a 1.5 T scanner. Here we present the characterization in terms of signal-to-noise ratio (SNR) of a dedicated RF coils suitably developed (by InSightec) to enable tcMRgFUS treatments with 1.5 T MR units. Methods and materials The focused ultrasound equipment (ExAblat…

PhysicsScannerExAblateBiophysicsGeneral Physics and AstronomyGeneral MedicineImaging phantom030218 nuclear medicine & medical imagingMagnetic resonance guided focused ultrasound surgery03 medical and health sciences0302 clinical medicineTransducerSignal-to-noise ratio (imaging)Electromagnetic coil030220 oncology & carcinogenesisRadiology Nuclear Medicine and imagingBiomedical engineeringRadiofrequency coilPhysica Medica
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Is there still a role for lesioning in functional neurosurgery: the Italian experience of delivering focused ultrasound high energy through a 1,5 tes…

2017

Settore MED/27 - NeurochirurgiaSettore MED/37 - NeuroradiologiaSettore MED/36 - Diagnostica Per Immagini E Radioterapiafunctional neurosurgery trans-cranial Magnetic Resonance guided Focused Ultrasound Surgery (tcMRgFUS) Magnetic Resonance Imaging (MRI) High Intensities Focused Ultrasounds (HI-FU)
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MR-guided focused ultrasound application for moving target tumor ablation in abdominal area: Coil selection

2020

PubMed: 32276552

SwineThermal ablationMagnetic Resonance Imaging InterventionalTumor ablationFocused ultrasound030218 nuclear medicine & medical imagingMagnetic resonance guided focused ultrasound surgery03 medical and health sciencesCE marking0302 clinical medicineEcho planar imagingAbdomenAnimalsHumansMedicineRadiology Nuclear Medicine and imagingRadiological and Ultrasound TechnologyEcho-Planar ImagingPhantoms Imagingbusiness.industryCoils magnetic resonance thermometry tracking echo planar imaging magnetic resonance-guided focused-ultrasound surgery CE marking validation verificationTrackingLiver NeoplasmsVerificationSettore MED/37 - NeuroradiologiaCoilsGeneral MedicineFocused ultrasound surgeryDisease Models AnimalLiverMagnetic resonance thermometryElectromagnetic coil030220 oncology & carcinogenesisHigh-Intensity Focused Ultrasound AblationbusinessSettore MED/36 - Diagnostica Per Immagini E RadioterapiaMri guidedMagnetic resonance thermometryBiomedical engineering
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