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https://www.readbyqxmd.com/read/28931264/assessment-of-the-accuracy-and-errors-of-head-up-display-by-an-optical-neuronavigation-system-in-brain-tumor-surgery
#1
Kenichiro Asano, Kosuke Katayama, Kiyohide Kakuta, Kanae Oyama, Hiroki Ohkuma
BACKGROUND: A head-up display (HUD) in which navigational information is projected into the microscope view may enable surgeons to perform operations more efficiently. Projecting depictions of both tumor and important intracranial structures on the HUD may facilitate safe surgery. OBJECTIVE: To investigate accuracy and errors regarding important intracranial structures, errors due to brain shifts, and preservation rates for important intracranial structures. METHODS: A total of 184 surgeries in 172 patients were performed using this operation system...
February 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28931252/a-simplified-method-of-accurate-postprocessing-of-diffusion-tensor-imaging-for-use-in-brain-tumor-resection
#2
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/28927224/supraorbital-keyhole-craniotomy-for-basilar-artery-aneurysms-accounting-for-the-cliff-effect
#3
Melissa M Stamates, Andrew K Wong, Anita Bhansali, Ricky H Wong
BACKGROUND: Treatment of basilar artery aneurysms is challenging. While endovascular techniques have dominated, there still remain circumstances where open surgical clipping is required or preferred. Minimally invasive "keyhole" approaches are being used more frequently to provide the durability of surgical clipping with a lower morbidity profile; however, careful patient selection is required. The supraorbital "keyhole" approach has been described for the treatment of basilar artery aneurysms, but careful assessment of the basilar exposure is necessary to ensure proper visualization of the aneurysm and ability to obtain proximal vascular control...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28927210/navigation-and-image-injection-for-control-of-bone-removal-and-osteotomy-planes-in-spine-surgery
#4
Michael Kosterhon, Angelika Gutenberg, Sven Rainer Kantelhardt, Elefterios Archavlis, Alf Giese
BACKGROUND AND IMPORTANCE: In contrast to cranial interventions, neuronavigation in spinal surgery is used in few applications, not tapping into its full technological potential. We have developed a method to preoperatively create virtual resection planes and volumes for spinal osteotomies and export 3-D operation plans to a navigation system controlling intraoperative visualization using a surgical microscope's head-up display. The method was developed using a Sawbone ® model of the lumbar spine, demonstrating feasibility with high precision...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28927206/preoperative-magnetic-resonance-and-intraoperative-computed-tomography-fusion-for-real-time-neuronavigation-in-intramedullary-lesion-surgery
#5
Francesco Costa, Alessandro Ortolina, Andrea Cardia, Marco Riva, Martina Revay, Guido Pecchioli, Carla Daniela Anania, Francesco Asteggiano, Maurizio Fornari
BACKGROUND: Image-guided surgery techniques in spinal surgery are usually based upon fluoroscopy or computed tomography (CT) scan, which allow for a real-time navigation of bony structures, though not of neural structures and soft tissue remains. OBJECTIVE: To verify the effectiveness and efficacy of a novel technique of imaging merging between preoperative magnetic resonance imaging (MRI) and intraoperative CT scan during removal of intramedullary lesions. METHODS: Ten consecutive patients were treated for intramedullary lesions using a navigation system aid...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28921173/maximizing-safe-resections-the-roles-of-5-aminolevulinic-acid-and-intraoperative-mr-imaging-in-glioma-surgery-review-of-the-literature
#6
REVIEW
Eric Suero Molina, S Schipmann, W Stummer
Malignant glioma surgery involves the challenge of preserving the neurological status of patients harboring these lesions while pursuing a maximal tumor resection, which is correlated with overall and progression-free survival. Presently, several tools exist for assisting neurosurgeons in visualizing malignant tissue. Fluorescence-guided surgery (FGS) with 5-aminolevulinic acid (5-ALA) has increasingly been used during the last decade for identifying malignant glioma. Intraoperative magnetic resonance imaging (iMRI), first introduced in the mid-1990s, is being evaluated as a further tool to maximize the extent of resection...
September 18, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28917288/intraoperative-imaging-for-vascular-lesions
#7
REVIEW
Vance L Fredrickson, Jonathan J Russin, Ben A Strickland, Joshua Bakhsheshian, Arun P Amar
Neurovascular surgery is a broad and challenging, yet exciting field within neurologic surgery. The neurovascular surgeon must be meticulous; because the brain and spinal cord are unforgiving to ischemic insults. Along with the pressures of this demanding subspecialty comes the potential to help patients recover from potentially devastating pathology to go on and lead normal, healthy lives. Several intraoperative imaging modalities are available to help maximize treatment success while reducing risk. This article reviews each of these modalities, including digital subtraction angiography, fluorescence angiography, Doppler ultrasonography, laser Doppler, laser speckle contrast imaging, neuronavigation, and neuroendoscopy...
October 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28917286/intraoperative-3d-computed-tomography-spine-surgery
#8
REVIEW
Stephanie E Adamczak, Frank J Bova, Daniel J Hoh
Spinal instrumentation often involves placing implants without direct visualization of their trajectory or proximity to adjacent neurovascular structures. Two-dimensional fluoroscopy is commonly used to navigate implant placement, but with the advent of computed tomography, followed by the invention of a mobile scanner with an open gantry, three-dimensional (3D) navigation is now widely used. This article critically appraises the available literature to assess the influence of 3D navigation on radiation exposure, accuracy of instrumentation, operative time, and patient outcomes...
October 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28917279/imri-during-transsphenoidal-surgery
#9
REVIEW
Prashant Chittiboina
A variety of intraoperative MRI (iMRI) systems are in use during transsphenoidal surgery (TSS). The variations in iMRI systems include field strengths, magnet configurations, and room configurations. Most studies report that the primary utility of iMRI during TSS lies in detecting resectable tumor residuals following maximal resection with conventional technique. Stereotaxis, neuronavigation, and complication avoidance/detection are enhanced by iMRI use during TSS. The use of iMRI during TSS can lead to increased extent of resection for large tumors...
October 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28887277/single-step-resection-of-an-intraosseous-meningioma-and-cranial-reconstruction-technical-note
#10
C E Broeckx, T J J Maal, R D Vreeken, R R M Bos, M Ter Laan
OBJECTIVE: Simultaneous tumour resection and cranial reconstruction can be a challenging task. Surgical navigation is an indispensible tool in making this single-step procedure possible. In this case report we describe a new technique for this procedure to ensure a precise resection and optimal fit of the implant in a patient with an intraosseous meningioma. METHODS: We generated a 3D model of the patients skull based on a CT-scan and created a digital 'resection line' object using 3D Studio Max 2016 software...
September 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28871368/infected-multilocular-hydrocephalus-treated-by-rigid-and-flexible-endoscopes-with-electromagnetic-guided-neuronavigation-a-case-report
#11
Ryuji Ishizaki, Yuzuru Tashiro
BACKGROUND: Endoscopic surgery assisted by a navigation system has greatly aided treatment of infected multilocular hydrocephalus, especially in children. CASE REPORT: We describe a 2-year-old boy with multilocular hydrocephalus caused by repeated shunt infection, presenting with fever and vomiting. Magnetic resonance images (MRI) showed extraventricular cysts and severe ventricular deformity. There were three ventriculoperitoneal shunts and one residual ventricular catheter...
September 4, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28842237/three-dimensional-cortical-surface-reconstruction-versus-operative-findings-their-similarity-and-applications
#12
Krishnapundha Bunyaratavej, Rungsak Siwanuwatn
BACKGOUND: Three-dimensional cortical surface reconstruction (3DCSR) is an important tool for operations involving cerebral cortex, but data on its similarity to actual cortical architecture are lacking. In this study, authors systematically tested the similarity between operative findings and 3DCSR built by a neuronavigation system and illustrated its applications. METHODS: Authors retrospectively retrieved operative photographs and 3DCSR of patients who underwent craniotomy with the aid of 3DCSR and asked four evaluators to perform a series of matching tests...
August 22, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28830029/persistent-uncrossed-corticospinal-connections-in-patients-with-intractable-focal-epilepsy
#13
Harper L Kaye, Roman Gersner, Aaron D Boes, Alvaro Pascual-Leone, Alexander Rotenberg
Corticospinal connections may be bilateral at birth, but a predominantly unilateral and crossed pattern develops by the toddler years. Acquired injury can alter the normal development of laterality such that uncrossed corticospinal connections persist, particularly if the injury is early in life and involves the motor system. Whether other developmental insults, such as childhood epilepsy, affect the development of crossed laterality in the motor system is unknown, although this topic has relevance for understanding the broader impact of epilepsy on brain development...
August 19, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28826862/identification-of-the-facial-nerve-in-relation-to-vestibular-schwannoma-using-preoperative-diffusion-tensor-tractography-and-intraoperative-tractography-integrated-neuronavigation-system
#14
Huan Li, Liang Wang, Shuyu Hao, Da Li, Zhen Wu, Liwei Zhang, Junting Zhang
BACKGROUND: Preoperative visualization of the facial nerve could help neurosurgeons to prevent facial nerve injury during the vestibular schwannoma (VS) surgery. Some studies have addressed diffusion tensor tractography (DTT) for preoperative identification of the facial nerve. However, few studies have focused on tractography-integrated neuronavigation for DTT verification. This study aimed to explore the appropriate DTT tracing parameters and evaluate the effect of intraoperative facial nerve tractography-integrated neuronavigation for verifying the DTT accuracy...
August 18, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28815666/dorsomedial-prefrontal-cortex-repetitive-transcranial-magnetic-stimulation-treatment-of-posttraumatic-stress-disorder-in-eating-disorders-an-open-label-case-series
#15
D Blake Woodside, Patricia Colton, Eileen Lam, Katharine Dunlop, Julia Rzeszutek, Jonathan Downar
Posttraumatic stress disorder (PTSD) is a common comorbid condition in anorexia nervosa (AN) and bulimia nervosa (BN), and may be associated with reduced response to treatment. We report on a case series employing repetitive transcranial magnetic stimulation (rTMS) with a novel target, the dorsomedial prefrontal cortex (DMPFC). Fourteen subjects with eating disorders and comorbid PTSD received 20-30 neuronavigated DMPFC-rTMS treatments on an open-label basis. PTSD symptoms were assessed pretreatment and posttreatment with the PTSD checklist-Civilian (PCL-C) and the Difficulties in Emotional Regulation Scale (DERS)...
August 16, 2017: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/28806496/anterior-superior-alveolar-nerve-injury-after-extended-endoscopic-medial-maxillectomy-a-preclinical-study-to-predict-neurological-morbidity
#16
Alberto Schreiber, Davide Mattavelli, Marco Ferrari, Vittorio Rampinelli, Davide Lancini, Marco Ravanelli, Giacomo Bertazzoni, Luigi Fabrizio Rodella, Barbara Buffoli, Francesco Doglietto, Piero Nicolai
BACKGROUND: Endoscopic medial maxillectomies (EMMs) are used to optimize exposure of the maxillary sinus and retromaxillary areas. Although in type D EMM (Sturmann-Canfield procedure) the anterior superior alveolar nerve (ASAN) is always at risk of injury, only 29% of patients complained of alveolar process and dental anesthesia. The purpose of this anatomical study is to assess the neural anastomotic network of the ASAN (ASAN-NAN) and describe different extensions of type D EMMs in a preclinical setting...
August 14, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28768920/neuronavigation-guided-frameless-stereoelectroencephalography-seeg
#17
Ayataka Fujimoto, Tohru Okanishi, Sotaro Kanai, Keishiro Sato, Mitsuyo Nishimura, Hideo Enoki
Stereoelectroencephalography (SEEG) is an invasive surgical procedure used to identify epileptogenic zones. The combination of both subdural grids and depth electrodes (DEs) is currently used for invasive intracranial monitoring in many epilepsy centers. To perform DE implantation, some centers use frame-based stereotactic techniques and others use stereotactic robotic techniques. However, not all epilepsy centers have access to these tools. We hypothesized that DE implantation using a neuronavigation system can be utilized for subsequent epilepsy surgery...
August 1, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28761527/the-benefits-of-navigated-neuroendoscopy-in-children-with-multiloculated-hydrocephalus
#18
Sergei Afanasievich Kim, German Vladimirovich Letyagin, Vasiliy Evgenievich Danilin, Anna Alekseevna Sysoeva, Jamil Afetovich Rzaev, Galina Ivanovna Moisak
CONTEXT: Multiloculated hydrocephalus remains one of the most challenging neurosurgical problems. In this study, we use frameless navigation during endoscopic interventions to improve the efficiency of operations. SUBJECTS AND METHODS: Nine navigated endoscopic procedures were performed in 8 children with various forms of multiloculated hydrocephalus from March 2013 to June 2014. Preoperatively, the optimal entry point for fenestration of several cysts was determined on the basis of magnetic resonance data...
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28760039/neuronavigation-and-3d-fluoroscopy-guided-lag-screw-reduction-and-osteosynthesis-for-traumatic-spondylolistheses-of-the-axis-a-path-worth-exploring
#19
Jan-Philip Zeden, Jan-Uwe Müller, Ehab Ahmed Mohamed El Refaee, Henry W S Schroeder, Dirk T Pillich
OBJECTIVE In traumatic spondylolistheses of the axis, there is a marked heterogeneity of the observed injury patterns, with a wide range of the severity-from stable fractures, which can be treated conservatively with very good success, to highly unstable fractures, which should be treated surgically. A number of classification systems have been devised to assess the instability of the injuries and to derive a corresponding therapy recommendation. In particular, the results and recommendations regarding medium-severity cases are still inconclusive...
August 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28758183/neuronavigation-guided-endoscopic-endonasal-excision-of-schwannoma-like-chordoma-of-the-meckel-s-cave-a-case-report
#20
Ali Akay, Sercan Göde, M Sedat Çağli
Chordomas are locally aggressive malignant tumors due to their recurrence potential, originating from the embryonic notochord remnants. Chordomas can originate anywhere on the axial skeleton. They are extradural and are spread by bone destruction. Chordomas are locally aggressive tumors which invade the dura mater, and may also present with secondary intradural growth. The Meckel's cave location of chordomas has been very rarely reported in the literature. Chordomas located in the Meckel's cave can be radiologically confused with trigeminal schwannomas...
June 14, 2017: Turkish Neurosurgery
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