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https://www.readbyqxmd.com/read/28537753/radiologic-pathologic-correlation-for-benign-results-after-mri-guided-breast-biopsy
#1
Katharine D Maglione, Amie Y Lee, Kimberly M Ray, Bonnie N Joe, Ronald Balassanian
OBJECTIVE: The majority of MRI-guided breast biopsies yield benign pathology. The purpose of this article is to provide a comprehensive overview of benign pathologic entities commonly encountered at MRI-guided breast biopsy. CONCLUSION: Proper radiologic-pathologic correlation is an integral component of MRI-guided breast biopsy. Familiarity with the spectrum of MRI findings and key histopathologic features of common benign entities will enhance the radiologist's confidence in determining concordance and lead to improved patient management recommendations...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28533806/second-salvage-high-dose-rate-brachytherapy-for-radiorecurrent-prostate-cancer
#2
Metha Maenhout, Marco van Vulpen, Marinus Moerland, Max Peters, Richard Meijer, Maurice van den Bosch, Paul Nguyen, Steven Frank, Jochem van der Voort van Zyp
PURPOSE: Salvage treatments for localized radiorecurrent prostate cancer can be performed safely when a focal and image guided approach is used. Due to the low toxicity, the opportunity exists to investigate a second salvage treatment when a second locally recurrent prostate cancer occurs. Here, we describe a second salvage treatment procedure of 4 patients. MATERIAL AND METHODS: Four patients with a pathologically proven second local recurrence were treated in an outpatient magnetic resonance imaging (MRI)-guided setting with a single fraction of 19 Gy focal high-dose-rate brachytherapy (HDR-BT)...
April 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28521346/real-time-magnetic-resonance-imaging-guided-biopsy-using-smartframe%C3%A2-stereotaxis-in-the-setting-of-a-conventional-diagnostic-magnetic-resonance-imaging-suite
#3
Justin K Scheer, Thomas Hamelin, Leon Chang, Brian Lemkuil, Bob S Carter, Clark C Chen
BACKGROUND: Real-time magnetic resonance imaging (MRI) visualization during stereotactic needle biopsies affords several valuable benefits to the neurosurgeon, including the opportunity to visually confirm the biopsy site at the time of surgery. Until now, reported experiences with this technique have been limited to the setting of intraoperative MRI or dedicated procedural MRI suites with modified ventilation systems. OBJECTIVE: To describe our experience with 11 consecutive patients who underwent real-time MRI-guided biopsy performed using SmartFrame® stereotaxis (MRI Interventions, Irvine, California) in the setting of a conventional diagnostic MRI suite...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28516809/real-time-mri-guided-percutaneous-sclerotherapy-treatment-of-venous-low-flow-malformations-in-the-head-and-neck
#4
Sasan Partovi, Ziang Lu, Lorenna Vidal, Dean A Nakamoto, Ji Buethe, Michael Coffey, Indravadan J Patel
Purpose This manuscript describes the technique of real-time MRI-guided sclerotherapy for low-flow venous malformations in the head and neck based on our institutional experience. Materials and methods Ethanolamine oleate is used as the sclerosant and is mixed with gadolinium for visualization during the procedure. The five procedural steps include: (I) an initial tri-plane T2-weighted sequence to visualize the lesion; (II) a T1 FSE or trueFISP sequence to assess needle placement and advancement within the lesion; (III) a tri-plane T1 FLASH sequence to monitor sclerosant injection; (IV) a T1 FSE or VIBE sequence to assess sclerosant coverage of the malformation before needle removal; (V) a post-procedural tri-plane T1 fat-saturated sequence to confirm sclerosant coverage of the lesion...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28510905/zoomed-mri-guided-by-combined-eeg-meg-source-analysis-a-multimodal-approach-for-optimizing-presurgical-epilepsy-work-up-and-its-application-in-a-multi-focal-epilepsy-patient-case-study
#5
Ü Aydin, S Rampp, A Wollbrink, H Kugel, J -H Cho, T R Knösche, C Grova, J Wellmer, C H Wolters
In recent years, the use of source analysis based on electroencephalography (EEG) and magnetoencephalography (MEG) has gained considerable attention in presurgical epilepsy diagnosis. However, in many cases the source analysis alone is not used to tailor surgery unless the findings are confirmed by lesions, such as, e.g., cortical malformations in MRI. For many patients, the histology of tissue resected from MRI negative epilepsy shows small lesions, which indicates the need for more sensitive MR sequences...
May 16, 2017: Brain Topography
https://www.readbyqxmd.com/read/28509682/new-neurosurgical-approaches-for-tremor-and-parkinson-s-disease
#6
Alfonso Fasano, Andres M Lozano, Esther Cubo
PURPOSE OF REVIEW: The objective of this review is to gather the newest advances in the surgical treatment of tremor and Parkinson's disease. We will briefly discuss the potential applications of the new technologies of deep brain stimulation (DBS), and we will focus on MRI-guided focused ultrasound (MRgFUS). RECENT FINDINGS: Novel DBS devices are being progressively adopted, particularly electrodes allowing a longer stimulating surface (suitable for multiple targets stimulation) and current radial steering (to minimize side effects of stimulation)...
May 13, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28508635/polydopamine-coated-manganese-carbonate-nanoparticles-for-amplified-magnetic-resonance-imaging-guided-photothermal-therapy
#7
Youxing Cheng, Shupeng Zhang, Ning Kang, Jianpan Huang, Xiaolin Lv, Kai Wen, Shefang Ye, Zhiwei Chen, Xi Zhou, Lei Ren
This study reports a multifunctional nanoparticle (NP) that can be used for amplified magnetic resonance image (MRI)-guided photothermal therapy (PTT) due to its surface coating with a polydopamine (PDA) shell. Importantly, by means of introducing the surface coating of PDA, large quantities of water can be trapped around the NPs allowing more efficient water exchange, leading to greatly improved MR contrast signals compared with those from NPs without the PDA coating. Further, a distinct photothermal effect can be obtained arising from the strong absorption of PDA in the near-infrared (NIR) region...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28506485/surgery-for-dysembryoplastic-neuroepithelial-tumors-and-gangliogliomas-in-eloquent-areas-functional-results-and-seizure-control
#8
B Devaux, F Chassoux, E Landré, B Turak, A Laurent, M Zanello, C Mellerio, P Varlet
INTRODUCTION: Dysembryoplastic neuroepithelial tumors and gangliogliomas are developmental glioneuronal tumors usually revealed by partial epilepsy. High epileptogenicity, childhood epilepsy onset, drug-resistance, temporal location, and seizure freedom after complete resection are common characteristics of both tumors. We report the specificity of surgical management, functional results and seizure outcome in cases of a tumor location in eloquent areas. METHODS: Among 150 patients (88 males, 3-55 years) operated on for refractory epilepsy due to a glioneuronal tumor (1990-2015), 30 (20%, dysembryoplastic neuroepithelial tumors=21; gangliogliomas=9) had a tumor located in an eloquent cortex (sensory-motor, insular or language areas)...
May 12, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28505539/revisiting-bilateral-thalamotomy-for-tremor
#9
REVIEW
Jumana Alshaikh, Paul S Fishman
MRI guided focused ultrasound surgery (MRgFUS) has been FDA approved for unilateral treatment of essential tremor (ET). Before this non-incisional lesioning method can be applied to the treatment of both hemispheres the previous experience with bilateral thalamic ablation must be addressed. In particular, the high incidence of worsening of speech and balance associated with bilateral surgical thalamotomy, a rationale for the development of deep brain stimulation. The highest incidence of these complication occurred in the early years of surgery for movement disorders, when neither MRI nor current stereotactic methods were available...
May 1, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28501087/the-role-of-radiotherapy-in-localized-esophageal-and-gastric-cancer
#10
REVIEW
John Ng, Percy Lee
Multimodality management has become a core treatment principle for locally advanced esophageal, gastroesophageal junction (GEJ), and gastric cancer. Radiotherapy serves an important role for optimizing patient outcomes. This article reviews the evolving role of radiotherapy in the multidisciplinary management of esophageal, GEJ, and gastric cancer, summarizing the results of recent clinical trials leading to contemporary accepted treatment approaches. A major theme is the evidence supporting the role of radiotherapy in combined modality management, particularly the trend toward its delivery in the neoadjuvant setting...
June 2017: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/28493526/real-time-mri-guidance-of-cardiac-interventions
#11
Adrienne E Campbell-Washburn, Mohammad A Tavallaei, Mihaela Pop, Elena K Grant, Henry Chubb, Kawal Rhode, Graham A Wright
Cardiac magnetic resonance imaging (MRI) is appealing to guide complex cardiac procedures because it is ionizing radiation-free and offers flexible soft-tissue contrast. Interventional cardiac MR promises to improve existing procedures and enable new ones for complex arrhythmias, as well as congenital and structural heart disease. Guiding invasive procedures demands faster image acquisition, reconstruction and analysis, as well as intuitive intraprocedural display of imaging data. Standard cardiac MR techniques such as 3D anatomical imaging, cardiac function and flow, parameter mapping, and late-gadolinium enhancement can be used to gather valuable clinical data at various procedural stages...
May 11, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28488844/mri-in-prostate-cancer-detection-and-management-a-systematic-review
#12
Fabio Monni, Paolo Fontanella, Angelica Grasso, Peter Wiklund, Yen-Chuan Ou, Marco Randazzo, Bernardo Rocco, Emanuele Montanari, Giampaolo Bianchi
INTRODUCTION: The aim of our work was to evaluate the role of multi-parametric MRI (mpMRI) in detection and management of prostate cancer (PC); specifically investigating the efficacy of mpMRI-based biopsy techniques in terms of diagnostic yield of significant prostate neoplasm and the improved management of patient who choose conservative treatments or active surveillance. EVIDENCE ACQUISITION: A systematic and critical analysis through Medline, Embase, Scopus and Web of Science databases was carried out in March 2016, following the PRISMA ("Preferred Reporting Items for Systematic Reviews and Meta-Analyses") statement...
May 8, 2017: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/28487460/functional-lesional-neurosurgery-for-tremor-a-protocol-for-a-systematic-review-and-meta-analysis
#13
Sebastian R Schreglmann, Joachim K Krauss, Jin Woo Chang, Kailash P Bhatia, Georg Kaegi
INTRODUCTION: The recent introduction of incision-less lesional neurosurgery using Gamma Knife and MRI-guided focused ultrasound has revived interest in lesional treatment options for tremor disorders. Preliminary literature researches reveal that the consistency of treatment effects after lesional neurosurgery for tremor has not formally been assessed yet. Similarly, the efficacy of different targets for lesional treatment and incidence of persistent side effects of lesional neurosurgical interventions has not been comprehensively assessed...
May 9, 2017: BMJ Open
https://www.readbyqxmd.com/read/28480109/deep-brain-stimulation-with-a-pre-existing-cochlear-implant-surgical-technique-and-outcome
#14
Daniel Eddelman, Joshua Wewel, R Mark Wiet, Leo V Metman, Sepehr Sani
BACKGROUND: Patients with previously implanted cranial devices pose a special challenge in deep brain stimulation (DBS) surgery. We report the implantation of bilateral DBS leads in a patient with a cochlear implant. Technical nuances and long-term interdevice functionality are presented. CASE DESCRIPTION: A 70-year-old patient with advancing Parkinson's disease and a previously placed cochlear implant for sensorineural hearing loss was referred for placement of bilateral DBS in the subthalamic nucleus (STN)...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28470744/mri-guided-breast-interventions
#15
Anika L McGrath, Elissa R Price, Peter R Eby, Habib Rahbar
Magnetic resonance imaging (MRI)-guided interventions, including biopsies and wire localizations, are fundamental to any breast imaging practice due to the high sensitivity but limited specificity of breast MRI. The basic steps of MRI-guided biopsies are similar regardless of the vendor or platform, and technical considerations include approach planning, patient preparation and positioning, lesion targeting, and directional sampling using a vacuum-assisted biopsy technique. Unique challenges related to MRI-guided biopsies include vanishing lesions due to contrast washout, obscuration of the biopsy site due to susceptibility artifacts, and limited access to posteromedial lesions...
May 4, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28465861/mri-guided-focused-ultrasound-in-parkinson-s-disease-a-review
#16
REVIEW
Ilana Schlesinger, Alon Sinai, Menashe Zaaroor
MRI-guided focused ultrasound is a new technology that enables intracranial ablation. Since lesioning ameliorates some of the symptoms of PD, this technology is being explored as a possible treatment for medication resistant symptoms in PD patients. The purpose of this paper is to review the clinical use and treatment outcomes of PD patients treated to date with this technology.
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28459678/multi-imager-compatible-mr-safe-remote-center-of-motion-needle-guide-robot
#17
Dan Stoianovici, Changhan Jun, Sunghwan Lim, Pan Li, Doru Petrisor, Stanley Fricke, Karun Sharma, Kevin Cleary
We report the development of a new robotic system for direct image-guided interventions, DIGI (images acquired at the time of the intervention). The manipulator uses our previously reported Pneumatic Step Motors and is entirely made of electrically nonconductive, nonmetallic, and nonmagnetic materials. It orients a needle-guide with 2 degrees of freedom (DoF) about a fulcrum point located below the guide using an innovative Remote Center of Motion (RCM) parallelogram type mechanism. The depth of manual needle insertion is preset with a 3rd DoF, located remotely of the manipulator...
April 25, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28453537/an-efficient-and-robust-mri-guided-radiotherapy-planning-approach-for-targeting-abdominal-organs-and-tumours-in-the-mouse
#18
Veerle Kersemans, John S Beech, Stuart Gilchrist, Paul Kinchesh, Philip D Allen, James Thompson, Ana L Gomes, Zenobia D'Costa, Luke Bird, Iain D C Tullis, Robert G Newman, Aurelien Corroyer-Dulmont, Nadia Falzone, Abul Azad, Katherine A Vallis, Owen J Sansom, Ruth J Muschel, Borivoj Vojnovic, Mark A Hill, Emmanouil Fokas, Sean C Smart
INTRODUCTION: Preclinical CT-guided radiotherapy platforms are increasingly used but the CT images are characterized by poor soft tissue contrast. The aim of this study was to develop a robust and accurate method of MRI-guided radiotherapy (MR-IGRT) delivery to abdominal targets in the mouse. METHODS: A multimodality cradle was developed for providing subject immobilisation and its performance was evaluated. Whilst CT was still used for dose calculations, target identification was based on MRI...
2017: PloS One
https://www.readbyqxmd.com/read/28451112/polydopamine-coated-manganese-oxide-nanoparticles-with-ultrahigh-relaxivity-as-nanotheranostic-agents-for-magnetic-resonance-imaging-guided-synergetic-chemo-photothermal-therapy
#19
Xing Ding, Jianhua Liu, Junqi Li, Fan Wang, Yinghui Wang, Shuyan Song, Hongjie Zhang
Mn-based nanoparticles have been regarded as a new class of probes for magnetic resonance imaging (MRI), but their low relaxivity is the major obstacle for applications in vivo. Herein, we designed and constructed a multifunctional nanotheranostic (FA-Mn3O4@PDA@PEG) for MRI guided combinatorial chemo-/photothermal therapy (PTT) for cancer. The ultrahigh relaxivity of 14.47 mM(-1) s(-1) makes the nanotheranostic an excellent contrast agent for MRI in vitro and in vivo, and provides comprehensive information for tumor diagnosis...
November 1, 2016: Chemical Science
https://www.readbyqxmd.com/read/28447178/an-mri-guided-telesurgery-system-using-a-fabry-perot-interferometry-force-sensor-and-a-pneumatic-haptic-device
#20
Hao Su, Weijian Shang, Gang Li, Niravkumar Patel, Gregory S Fischer
This paper presents a surgical master-slave teleoperation system for percutaneous interventional procedures under continuous magnetic resonance imaging (MRI) guidance. The slave robot consists of a piezoelectrically actuated 6-degree-of-freedom (DOF) robot for needle placement with an integrated fiber optic force sensor (1-DOF axial force measurement) using the Fabry-Perot interferometry (FPI) sensing principle; it is configured to operate inside the bore of the MRI scanner during imaging. By leveraging the advantages of pneumatic and piezoelectric actuation in force and position control respectively, we have designed a pneumatically actuated master robot (haptic device) with strain gauge based force sensing that is configured to operate the slave from within the scanner room during imaging...
April 26, 2017: Annals of Biomedical Engineering
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