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image guided brain surgery

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https://www.readbyqxmd.com/read/29139243/wide-field-spectrally-resolved-quantitative-fluorescence-imaging-system-toward-neurosurgical-guidance-in-glioma-resection
#1
Yijing Xie, Maria Thom, Michael Ebner, Victoria Wykes, Adrien Desjardins, Anna Miserocchi, Sebastien Ourselin, Andrew W McEvoy, Tom Vercauteren
In high-grade glioma surgery, tumor resection is often guided by intraoperative fluorescence imaging. 5-aminolevulinic acid-induced protoporphyrin IX (PpIX) provides fluorescent contrast between normal brain tissue and glioma tissue, thus achieving improved tumor delineation and prolonged patient survival compared with conventional white-light-guided resection. However, commercially available fluorescence imaging systems rely solely on visual assessment of fluorescence patterns by the surgeon, which makes the resection more subjective than necessary...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29121778/intraoperative-image-guided-surgery-in-neuro-oncology-with-specific-focus-on-high-grade-gliomas
#2
Syed O Mahboob, Muftah Eljamel
Surgery is paramount in glioma management and extent of resection is an independent significant prognostic factor. However, these tumors are often invisible intraoperatively. Hence imaging plays an important role in surgical guidance. A critical literature review, using MEDLINE/PubMed service was carried out. It demonstrated a gross total resection (GTR) with neuronavigation (NNS) of 31-36%, adding 5-aminolevulinic acid or fluorescein fluorescence, or intraoperative ultrasound or MRI improved GTR to 69.1, 84...
November 2017: Future Oncology
https://www.readbyqxmd.com/read/29106741/development-and-characterization-of-a-handheld-hyperspectral-raman-imaging-probe-system-for-molecular-characterization-of-tissue-on-mesoscopic-scales
#3
Karl St-Arnaud, Kelly Aubertin, Mathias Strupler, Wendy-Julie Madore, Andrée-Anne Grosset, Kevin Petrecca, Dominique Trudel, Frédéric Leblond
PURPOSE: Raman spectroscopy is a promising cancer detection technique for surgical guidance applications. It can provide quantitative information relating to global tissue properties associated with structural, metabolic, immunological and genetic biochemical phenomena in terms of molecular species including amino acids, lipids, proteins, and nucleic acid (DNA). To date in vivo Raman spectroscopy systems mostly included probes and biopsy needles typically limited to single-point tissue interrogation over a scale between 100 and 500 microns...
November 6, 2017: Medical Physics
https://www.readbyqxmd.com/read/29105281/semi-autonomous-image-guided-brain-tumour-resection-using-an-integrated-robotic-system-a-bench-top-study
#4
Danying Hu, Yuanzheng Gong, Eric J Seibel, Laligam N Sekhar, Blake Hannaford
BACKGROUND: Complete brain tumour resection is an extremely critical factor for patients' survival rate and long-term quality of life. This paper introduces a prototype medical robotic system that aims to automatically detect and clean up brain tumour residues after the removal of tumour bulk through conventional surgery. METHODS: We focus on the development of an integrated surgical robotic system for image-guided robotic brain surgery. The Behavior Tree framework is explored to coordinate cross-platform medical subtasks...
November 3, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29100727/operative-and-therapeutic-advancements-in-breast-cancer-metastases-to-the-brain
#5
REVIEW
Rahul Jandial, Reid Hoshide, J Dawn Waters, George Somlo
Patients with breast cancer are surviving longer as the state of the art for care advances. Because patients are surviving longer with primary breast cancer, the incidence of secondary metastatic disease has risen. Metastatic breast cancer to the brain was once thought to be universally fatal. While it is still quite lethal, its treatment after diagnosis is increasingly safe and effective. Critical progress has been made in understanding the interaction between breast metastases and the neural niche, neuroimaging of functional anatomy, minimally invasive image-guided brain surgery, characterizing subtypes of breast cancer based on molecular and genetic profiles, and individualized pharmaceuticals and immunotherapies...
October 7, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29031866/connectivity-changes-after-laser-ablation-resting-state-fmri
#6
Varina L Boerwinkle, Aditya Vedantam, Sandi Lam, Angus A Wilfong, Daniel J Curry
Resting-state functional magnetic resonance imaging (rsfMRI) is emerging as a useful tool in the multimodal assessment of patients with epilepsy. In pediatric patients who cannot perform task-based fMRI, rsfMRI may present an adjunct and alternative. Although changes in brain activation during task-based fMRI have been described after surgery for epilepsy, there is limited data on the role of postoperative rsfMRI. In this short review, we discuss the role of postoperative rsfMRI after laser ablation of seizure foci...
September 28, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28973406/targeting-accuracy-of-the-subthalamic-nucleus-in-deep-brain-stimulation-surgery-comparison-between-3-t-t2-weighted-magnetic-resonance-imaging-and-microelectrode-recording-results
#7
Andreas Nowacki, Ines Debove, Michael Fiechter, Frédéric Rossi, Markus Florian Oertel, Roland Wiest, Michael Schüpbach, Claudio Pollo
BACKGROUND: Targeting accuracy in deep brain stimulation (DBS) surgery can be defined as the level of accordance between selected and anatomic real target reflected by characteristic electrophysiological results of microelectrode recording (MER). OBJECTIVE: To determine the correspondence between the preoperative predicted target based on modern 3-T magnetic resonance imaging (MRI) and intraoperative MER results separately on the initial and consecutive second side of surgery...
August 2, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28962117/nearly-asymptomatic-intracranial-capillary-hemangiomas-a-case-report-and-literature-review
#8
Xiaoyu Xia, Haoju Zhang, Hongyan Gao, Yi Yang, Yiwu Dai, Yang Jiao, Jianghong He
The present study reported a nearly asymptomatic case of intracranial capillary hemangioma (ICHs), which are rare benign vascular tumors or tumor-like lesions. A 33-year-old female came to the hospital with a complaint of a slight but recurring morning headache concentrated in the left posterior occipital area. These headaches spontaneously resolved without any treatment. Computed tomography and magnetic resonance imaging revealed a mass inside the left occipital lobe. The patient refused to undergo conservative observation at home and insisted on radical therapy...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28961898/a-computerized-microelectrode-recording-to-magnetic-resonance-imaging-mapping-system-for-subthalamic-nucleus-deep-brain-stimulation-surgery
#9
Sunjay S Dodani, Charles W Lu, J Wayne Aldridge, Kelvin L Chou, Parag G Patil
BACKGROUND: Accurate electrode placement is critical to the success of deep brain stimulation (DBS) surgery. Suboptimal targeting may arise from poor initial target localization, frame-based targeting error, or intraoperative brain shift. These uncertainties can make DBS surgery challenging. OBJECTIVE: To develop a computerized system to guide subthalamic nucleus (STN) DBS electrode localization and to estimate the trajectory of intraoperative microelectrode recording (MER) on magnetic resonance (MR) images algorithmically during DBS surgery...
August 5, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28935534/neurosurgical-microscopic-solid-laser-based-light-inhibits-photobleaching-during-fluorescence-guided-brain-tumor-removal-with-5-aminolevulinic-acid
#10
Fumitaka Matsuda, Naokado Ikeda, Yoshinaga Kajimoto, Naosuke Nonoguchi, Koji Takeuchi, Masao Fukumura, Shinji Kawabata, Motomasa Furuse, Tetsuo Sugano, Taku Sato, Kiyoshi Saito, Toshihiko Kuroiwa
BACKGROUND: Fluorescence image guided surgery (FIGS) with 5-aminolevulinic acid for malignant gliomas improves surgical outcome. One of the problems during FIGS is photobleaching under surgical microscopic white light. A solid laser-based white light source for neurosurgery that we developed does not include light with a wavelength of around 405nm, which is strongly absorbed by protoporphyrin IX. In the present study, we examined the efficacy of this light source to prevent the photobleaching of protoporphyrin IX-induced fluorescence...
September 18, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28931252/a-simplified-method-of-accurate-postprocessing-of-diffusion-tensor-imaging-for-use-in-brain-tumor-resection
#11
Phillip A Bonney, Andrew K Conner, Lillian B Boettcher, Ahmed A Cheema, Chad A Glenn, Adam D Smitherman, Nathan A Pittman, Michael E Sughrue
BACKGROUND: Use of diffusion tensor imaging (DTI) in brain tumor resection has been limited in part by a perceived difficulty in implementing the techniques into neurosurgical practice. OBJECTIVE: To demonstrate a simple DTI postprocessing method performed without a neuroscientist and to share results in preserving patient function while aggressively resecting tumors. METHODS: DTI data are obtained in all patients with tumors located within presumed eloquent cortices...
February 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28924572/stereovision-based-integrated-system-for-point-cloud-reconstruction-and-simulated-brain-shift-validation
#12
Xiaochen Yang, Logan W Clements, Ma Luo, Saramati Narasimhan, Reid C Thompson, Benoit M Dawant, Michael I Miga
Intraoperative soft tissue deformation, referred to as brain shift, compromises the application of current image-guided surgery navigation systems in neurosurgery. A computational model driven by sparse data has been proposed as a cost-effective method to compensate for cortical surface and volumetric displacements. We present a mock environment developed to acquire stereoimages from a tracked operating microscope and to reconstruct three-dimensional point clouds from these images. A reconstruction error of 1 mm is estimated by using a phantom with a known geometry and independently measured deformation extent...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28917285/fluorescence-imaging-agents-in-tumor-resection
#13
REVIEW
Walter Stummer, Eric Suero Molina
Intraoperative fluorescence imaging allows real-time identification of diseased tissue during surgery without being influenced by brain shift and surgery interruption. 5-Aminolevulinic acid, useful for malignant gliomas and other tumors, is the most broadly explored compound approved for fluorescence-guided resection. Intravenous fluorescein sodium has recently received attention, highlighting tumor tissue based on extravasation at the blood-brain barrier (defective in many brain tumors). Fluorescein in perfused brain, unselective extravasation in brain perturbed by surgery, and propagation with edema are concerns...
October 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28905504/is-essential-tremor-a-single-entity
#14
REVIEW
F Hopfner, G Deuschl
Essential tremor (ET) is a frequent movement disorder. The new tremor classification has subdivided ET into the classical form with bilateral action tremor of the hands with or without involvement of further tremor locations and without any other explaining signs or symptoms for the tremor and into 'ET plus' which comes additionally with further neurological signs of unknown origin. This will provide a better foundation for subclassifying the condition. The immediate cause of ET is a preformed oscillating network within the central nervous system as revealed with electrophysiological methods...
September 14, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28880999/stereo-eeg-diagnostic-and-therapeutic-tool-for-periventricular-nodular-heterotopia-epilepsies
#15
Laura Mirandola, Roberto F Mai, Stefano Francione, Veronica Pelliccia, Francesca Gozzo, Ivana Sartori, Lino Nobili, Francesco Cardinale, Massimo Cossu, Stefano Meletti, Laura Tassi
OBJECTIVE: Periventricular nodular heterotopias (PNHs) are malformations of cortical development related to neuronal migration disorders, frequently associated with drug-resistant epilepsy (DRE). Stereo-electroencephalography (SEEG) is considered a very effective step of the presurgical evaluation, providing the recognition of the epileptogenic zone (EZ). At the same time, via the intracerebral electrodes it is possible to perform radiofrequency thermocoagulation (SEEG-guided RF-TC) with the aim of ablating and/or disrupting the EZ...
November 2017: Epilepsia
https://www.readbyqxmd.com/read/28872032/atlas-of-electroencephalography-3rd-edition
#16
Ali Akbar Asadi-Pooya, Dennis Dlugos, Christopher Skidmore, Michael R Sperling
Electroencephalography (EEG) is the recording of the electrical activity of the brain. EEG is a reliable test to assess cerebral function. It aids in diagnosis, classification, and management of patients with epilepsy. It also has practical uses in conditions other than epilepsy. Moreover, it is harmless and inexpensive. EEG is an important tool for evaluating patients with epilepsy. It may help classify the syndrome, identify the likely source of focal seizures, and confirm a diagnosis of status epilepticus...
September 5, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28844925/multimodal-18-f-fluciclovine-pet-mri-and-ultrasound-guided-neurosurgery-of-an-anaplastic-oligodendroglioma
#17
Anna Karlberg, Erik Magnus Berntsen, Håkon Johansen, Mariane Myrthue, Anne Jarstein Skjulsvik, Ingerid Reinertsen, Morteza Esmaeili, Hong Yan Dai, Yiming Xiao, Hassan Rivaz, Per Borghammer, Ole Solheim, Live Eikenes
BACKGROUND: Structural magnetic resonance imaging (MRI) and histopathologic tissue sampling are routinely performed as part of the diagnostic workup for patients with glioma. Because of the heterogeneous nature of gliomas, there is a risk of undergrading caused by histopathologic sampling errors. MRI has limitations in identifying tumor grade and type, detecting diffuse invasive growth, and separating recurrences from treatment induced changes. Positron emission tomography (PET) can provide quantitative information of cellular activity and metabolism, and may therefore complement MRI...
August 24, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28842674/hyperspectral-data-processing-improves-ppix-contrast-during-fluorescence-guided-surgery-of-human-brain-tumors
#18
J J Bravo, J D Olson, S C Davis, D W Roberts, K D Paulsen, S C Kanick
Fluorescence guided surgery (FGS) using aminolevulinic-acid (ALA) induced protoporphyrin IX (PpIX) provides intraoperative visual contrast between normal and malignant tissue during resection of high grade gliomas. However, maps of the PpIX biodistribution within the surgical field based on either visual perception or the raw fluorescence emissions can be masked by background signals or distorted by variations in tissue optical properties. This study evaluates the impact of algorithmic processing of hyperspectral imaging acquisitions on the sensitivity and contrast of PpIX maps...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28842233/pattern-of-corticospinal-projections-defined-by-brain-mapping-during-resective-epilepsy-surgery-in-a-patient-with-congenital-hemiparesis-and-intractable-epilepsy
#19
Chen-Ya Yang, Hsin-Hung Chen, Chien Chen, Jan-Wei Chiu, Chen-Liang Chou, Tsui-Fen Yang
BACKGROUND: Congenital or early-onset brain structural lesions often cause contralateral hemiparesis, cognitive deficits, developmental delays, and seizures. Seizure is the most debilitating condition, as it greatly impairs quality of life in both the affected individuals and their caregivers and prevents them from active social participation. CASE DESCRIPTION: A 34-year-old man with hemiparesis and early-onset seizures since childhood owing to a congenital brain lesion developed intractable seizures in the last 2 years and was subsequently admitted for resective epileptic surgery...
November 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28842228/microelectrode-recording-guided-versus-intraoperative-magnetic-resonance-imaging-guided-subthalamic-nucleus-deep-brain-stimulation-surgery-for-parkinson-disease-a-1-year-follow-up-study
#20
Xuemeng Liu, Jibo Zhang, Kai Fu, Rui Gong, Jincao Chen, Jie Zhang
BACKGROUND: Microelectrode recording (MER) and intraoperative magnetic resonance imaging (iMRI) have been used in deep brain stimulation surgery for Parkinson disease (PD), but comparative methodology is lacking. Therefore, we compared the 1-year follow-up outcomes of MER-guided and iMRI-guided subthalamic nucleus (STN) deep brain stimulation (DBS) surgery in PD patients. METHODS: We conducted a review comparing PD patients who underwent MER-guided (n = 76, group A) and iMRI-guided STN DBS surgery (n = 61, group B) in our institution...
November 2017: World Neurosurgery
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