Search results for "High-Intensity Focused Ultrasound Ablation"

showing 10 items of 17 documents

Is Transcranial Magnetic Resonance Imaging-Guided Focused Ultrasound a Repeatable Treatment Option? Case Report of a Retreated Patient With Tremor Co…

2019

Introduction In recent years, transcranial Magnetic Resonance Imaging-guided Focused Ultrasound (tcMRgFUS) treatments for functional neurological disorders are giving a new thrust to the field of therapeutic brain lesioning. Objective To present the case of a patient affected by tremor combined with Parkinsonism who underwent a second tcMRgFUS thalamotomy because of relapsing tremor after a few months from the first tcMRgFUS treatment. Methods A 72-yr-old, right-handed man, came to our observation because of a disabling tremor affecting his upper limbs, refusing any invasive surgical procedure and already treated by tcMRgFUS left Vim thalamotomy. However, clinical benefit had brief duration…

Malemedicine.medical_specialtyInterventional magnetic resonance imagingmedicine.medical_treatmentEssential TremorFocused ultrasoundParkinsonian DisordersTremorMedicineHumansAgedmedicine.diagnostic_testbusiness.industryPatient affectedThalamotomySettore MED/27 - NeurochirurgiaParkinsonismSettore FIS/01 - Fisica SperimentaleTreatment optionsSettore MED/37 - NeuroradiologiaMagnetic resonance imagingmedicine.diseaseMagnetic Resonance ImagingTreatment OutcomeStereotaxic techniqueSurgerySettore MED/26 - NeurologiaNeurology (clinical)RadiologyHigh-intensity focused ultrasound ablation Minimally invasive surgical procedures Stereo- taxic techniques Tremor Parkinsonian disorders Interventional magnetic resonance imaging Intraoperative monitoringbusinessSettore MED/36 - Diagnostica Per Immagini E Radioterapia
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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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Transcranial Magnetic Resonance-Guided Focused Ultrasound Surgery for Brain Tumor Ablation: Are We Ready for This Challenging Treatment?

2018

The treatment of high-grade gliomas (HGGs) remains a challenge for modern therapy. The prognosis for these patients has been poor. The median patient survival after diagnosis has been ∼1 year with surgery and/or radiotherapy and temozolomide.1 The need for a histological diagnosis of tumor tissue in each case and the importance of decompression in symptomatic patients are well established, and extensive surgical resection has been shown to significantly prolong survival. Several factors play a role in the prognosis of patients with HGG, including age, performance status using the Karnofsky performance scale, and the extent of resection.2, 3 At present, the standard therapy for HHG consists …

medicine.medical_specialtymedicine.medical_treatmentBrain tumor01 natural sciencesMagnetic resonance guided focused ultrasound surgeryBrain Neoplasm03 medical and health sciences0302 clinical medicine0103 physical sciencesmedicineHumans010306 general physicsSettore MED/27 - Neurochirurgiabusiness.industryBrain NeoplasmsSettore MED/37 - NeuroradiologiaBrainAblationmedicine.diseaseMagnetic Resonance Imagingbrain; brain neoplasms; high-intensity focused ultrasound ablation; humans; magnetic resonance imagingHigh-Intensity Focused Ultrasound AblationSurgeryNeurology (clinical)RadiologySettore MED/36 - Diagnostica Per Immagini E Radioterapiabusiness030217 neurology & neurosurgeryHumanWorld neurosurgery
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[Non-invasive trans-cranial magnetic resonance imaging-guided focused ultrasounds surgery to treat neurologic disorders]

2016

Negli anni passati le applicazioni non invasive degli ultrasuoni focalizzati guidati da risonanza magnetica per il trattamento dei disordini neurologici sono state osta- colate da limiti tecnici oggi finalmente superati. In Italia, nel corso del 2015, sono stati effettuati i primi trattamenti utilizzando per la prima volta al mondo un comune scanner di risonanza magnetica da 1.5T. I risultati a oggi ottenuti con questa nuova metodica e le sue future possibili appli- cazioni sono molto promettenti e aprono la strada verso nuove opzioni terapeutiche, sicure ed efficaci, un tempo impensabili. In past years non-invasive clinical applications of magnetic resonance-guided focused ultrasound for t…

Treatment OutcomeItalySettore MED/27 - NeurochirurgiaHumansHigh-Intensity Focused Ultrasound AblationSettore MED/37 - NeuroradiologiaNervous System DiseasesMagnetic Resonance ImagingHuman
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Chirurgia trans-cranica mediante ultrasuoni focalizzati ad alta intensità su guida RM: esperienza preliminare a 1,5T

2015

Da qualche anno la chirurgia mediante ultrasuoni focalizzati ad alta intensità guidati da Risonanza Magnetica (Magnetic Resonance guided Focused Ultrasound Surgery, MRgFUS) si sta diffondendo anche in Italia per la palliazione del dolore da metastasi ossee, per il trattamento di tumori ossei primitivi (benigni e non), dei fibromi e dell’adenomiosi uterina; sono già stati inoltre pubblicati i risultati preliminari del trattamento di alcuni tumori epatici, pancreatici, prostatici e della mammella mediante MRgFUS. Questa innovativa tecnica prevede l’utilizzo di un’apparecchiatura di Risonanza Magnetica per il monitoraggio della procedura e sfrutta le caratteristiche fisico- meccaniche degli …

Settore MED/27 - NeurochirurgiaBrain High-Intensity Focused Ultrasound ablation Interventional Magnetic Resonance Imaging Minimally Invasive Surgical Procedures Stereotactic TechniquesSettore MED/37 - Neuroradiologia
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Transcranial magnetic resonance imaging-guided focused ultrasound treatment at 1.5 T: a retrospective study on treatment and patient-related paramete…

2020

Objective: To present a retrospective analysis of patient- and sonication-related parameters of a group of patients treated with a transcranial magnetic resonance imaging (MRI)-guided focused ultrasound (tcMRgFUS) system integrated with a 1.5-T MRI unit. Methods: The data obtained from 59 patients, who underwent the tcMRgFUS procedure from January 2015 to April 2019, were retrospectively reviewed for this study. The following data, among others, were mainly collected: skull density ratio (SDR), skull area (SA), number of available transducer elements (Tx), and estimated focal power at target (FP). For each of the four different treatment stages, we calculated the number of sonication proces…

Interventional magnetic resonance imagingMaterials Science (miscellaneous)medicine.medical_treatmentParkinson's diseaseEssential TremorBiophysicsGeneral Physics and Astronomy01 natural sciencesFocused ultrasound0103 physical sciencesmedicinePlane orientationInterventional Magnetic Resonance ImagingPhysical and Theoretical Chemistry010306 general physicsMathematical Physicsmedicine.diagnostic_testbusiness.industryThalamotomySettore MED/27 - NeurochirurgiaSettore MED/37 - NeuroradiologiaMagnetic resonance imagingRetrospective cohort studystereotaxic techniqueslcsh:QC1-999Settore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Parkinson Disease.essential tremor; high-intensity focused ultrasound ablation; interventional magnetic resonance imaging; Parkinson's disease; stereotaxic techniquesCoronal planeStereotaxic techniqueHigh-Intensity Focused Ultrasound AblationStereotaxic TechniqueSettore MED/26 - NeurologiaNuclear medicinebusinessSettore MED/36 - Diagnostica Per Immagini E Radioterapialcsh:Physics
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Preoperative imaging findings in patients undergoing transcranial magnetic resonance imaging-guided focused ultrasound thalamotomy

2021

AbstractThe prevalence and impact of imaging findings detected during screening procedures in patients undergoing transcranial MR-guided Focused Ultrasound (tcMRgFUS) thalamotomy for functional neurological disorders has not been assessed yet. This study included 90 patients who fully completed clinical and neuroradiological screenings for tcMRgFUS in a single-center. The presence and location of preoperative imaging findings that could impact the treatment were recorded and classified in three different groups according to their relevance for the eligibility and treatment planning. Furthermore, tcMRgFUS treatments were reviewed to evaluate the number of transducer elements turned off after…

Maletranscranial magnetic resonance; thalamotomy; neurological disordersParkinson's diseasemedicine.medical_treatmentneurological disordersNeuropathic paintranscranial magnetic resonance030218 nuclear medicine & medical imaging0302 clinical medicineThalamusMass ScreeningRadiation treatment planningScreening proceduresAged 80 and overeducation.field_of_studyMultidisciplinarymedicine.diagnostic_testSettore MED/27 - NeurochirurgiaQRSettore MED/37 - NeuroradiologiaDisease ManagementMiddle AgedMagnetic Resonance ImagingSurgery Computer-AssistedMedicineStereotaxic TechniqueSettore MED/26 - NeurologiaFemaleRadiologyAdultmedicine.medical_specialtyEssential TremorScienceClinical Decision-MakingPopulationNeuroimagingArticleFocused ultrasoundMultiple sclerosisYoung Adult03 medical and health sciencesComputed TomographyMedical researchParkinson’s Disease.Preoperative CaremedicineHumansInterventional Magnetic Resonance ImagingIn patientMovement disorderseducationHigh-intensity Focused Ultrasound AblationUltrasonography InterventionalAgedThalamotomybusiness.industryMagnetic resonance imagingthalamotomySettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Diseases of the nervous systemSettore MED/36 - Diagnostica Per Immagini E RadioterapiaTomography X-Ray ComputedbusinessMR-guided Focused Ultrasound030217 neurology & neurosurgeryNeurosciencePreoperative imaging
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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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Transcranial magnetic resonance-guided focused ultrasound thalamotomy as a safe treatment option in multiple sclerosis patients with essential tremor

2020

Transcranial magnetic resonance-guided focused ultrasound is a recently introduced incisionless treating option for essential tremor and tremor-dominant idiopathic Parkinson disease. There is preliminary evidence that it may result in a promising effective treatment option for other movement disorders too. Here, we report on two patients with multiple sclerosis with medication refractory debilitating essential tremor comorbidity who successfully underwent unilateral Vim tcMRgFUS thalamotomy for tremor control. Patients' clinical condition and expanded disability status scale scores showed no changes during the 1-year follow-up period with no evidence of multiple sclerosis activity or progre…

medicine.medical_specialtyNeurologyMovement disordersMagnetic Resonance SpectroscopyMultiple Sclerosismedicine.medical_treatmentEssential TremorDermatologyStereotaxic Techniques03 medical and health sciences0302 clinical medicinePhysical medicine and rehabilitationThalamusMultiple SclerosimedicineHumansInterventional Magnetic Resonance Imaging030212 general & internal medicineExpanded Disability Status Scalemedicine.diagnostic_testEssential tremorThalamotomybusiness.industrySettore MED/27 - NeurochirurgiaMultiple sclerosisSettore MED/37 - NeuroradiologiaMagnetic resonance imagingGeneral Medicinemedicine.diseaseMagnetic Resonance Imagingnervous system diseasesPsychiatry and Mental healthTreatment OutcomeStereotaxic techniqueHigh-Intensity Focused Ultrasound AblationSettore MED/26 - NeurologiaNeurology (clinical)medicine.symptombusinessSettore MED/36 - Diagnostica Per Immagini E Radioterapia030217 neurology & neurosurgery
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MRgFUS results Italy

2017

PURPOSE: To present our preliminary results achieved with the first Italian installation of a trans-cranial MRI-guided Focused Ultrasound Surgery (tcMRgFUS) certified system for functional neurosurgery. Moreover, to our knowledge, this is the world-first tcMRgFUS system ever installed on a 1.5T MRI unit. Technical issues faced to achieve a safe and effective treatment will be discussed focusing on MR high-resolution live imaging and thermometry sequences optimization. METHOD AND MATERIALS: Patient enrollment was based on indication for functional neurosurgery and evidence of medication-refractory disease; a detailed medical history has been collected together with a complete clinical examin…

Stereotaxic TechniquesBrain; High-Intensity Focused Ultrasound ablation; Magnetic Resonance Imaging Interventional; Minimally Invasive Surgical Procedures; Stereotaxic TechniquesHigh-Intensity Focused Ultrasound ablationSettore MED/27 - NeurochirurgiaBrainSettore MED/37 - NeuroradiologiaSettore MED/26 - NeurologiaMinimally Invasive Surgical ProcedureMagnetic Resonance Imaging InterventionalSettore MED/36 - Diagnostica Per Immagini E Radioterapia
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