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https://www.readbyqxmd.com/read/29782617/patient-specific-neurosurgical-phantom-assessment-of-visual-quality-accuracy-and-scaling-effects
#1
Felipe Wilker Grillo, Victor Hugo Souza, Renan Hiroshi Matsuda, Carlo Rondinoni, Theo Zeferino Pavan, Oswaldo Baffa, Helio Rubens Machado, Antonio Adilton Oliveira Carneiro
Background: Training in medical education depends on the availability of standardized materials that can reliably mimic the human anatomy and physiology. One alternative to using cadavers or animal bodies is to employ phantoms or mimicking devices. Styrene-ethylene/butylene-styrene (SEBS) gels are biologically inert and present tunable properties, including mechanical properties that resemble the soft tissue. Therefore, SEBS is an alternative to develop a patient-specific phantom, that provides real visual and morphological experience during simulation-based neurosurgical training...
2018: 3D printing in medicine
https://www.readbyqxmd.com/read/29774873/-application-of-intraoperative-mri-combined-with-neuronavigation-in-microsurgical-resection-for-insular-glioma
#2
Quanwei Zhou, Li Xia, Kejun He, Sheng Yan, Xiaoping Xu, Xixi Li, Zhengsong Huang, Nu Zhang
To evaluate the value of intraoperative magnetic resonance imaging (iMRI) combined with neuronavigation for the resection of insular gliomas.
 Methods: From August 2014 to October 2017 in the First Hospital Affiliated to Sun Yat-sen University, clinical data of 41 patients with insular glioma, who underwent the surgery assisted with 3.0T iMRI and neuronavigation, were analyzed retrospectively, and the resection extent, complications and prognosis were evaluated.
 Results: Subtotal tumor resection was achieved in 21 patients and partial resection was done in 20 after iMRI scanning...
April 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29762886/automatic-m1-so-montage-headgear-for-transcranial-direct-current-stimulation-tdcs-suitable-for-home-and-high-throughput-in-clinic-applications
#3
Helena Knotkova, Alexa Riggs, Destiny Berisha, Helen Borges, Henry Bernstein, Vaishali Patel, Dennis Q Truong, Gozde Unal, Denis Arce, Abhishek Datta, Marom Bikson
OBJECTIVES: Non-invasive transcranial direct current stimulation (tDCS) over the motor cortex is broadly investigated to modulate functional outcomes such as motor function, sleep characteristics, or pain. The most common montages that use two large electrodes (25-35 cm2 ) placed over the area of motor cortex and contralateral supraorbital region (M1-SO montages) require precise measurements, usually using the 10-20 EEG system, which is cumbersome in clinics and not suitable for applications by patients at home...
May 15, 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29754996/dce-mri-in-human-gliomas-a-surrogate-for-assessment-of-invasive-hypoxia-marker-hif-1%C3%AE-based-on-mri-neuronavigation-stereotactic-biopsies
#4
Qian Xie, Juan Wu, Zunguo Du, Ningning Di, Ren Yan, Haopeng Pang, Teng Jin, Hua Zhang, Yue Wu, Yong Zhang, Zhenwei Yao, Xiaoyuan Feng
RATIONALE AND OBJECTIVES: The purpose of this study was to correlate dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters with data from a specific marker of hypoxia, hypoxia-inducible factor 1α (HIF-1α), in human gliomas on a point-to-point basis by using coregistered magnetic resonance imaging and frameless stereotactic biopsies. MATERIALS AND METHODS: Thirty-four patients with treatment-naive gliomas underwent DCE, axial T1-weighted, T2-weighted, T2-weighted fluid acquisition of inversion recovery, and three-dimensional T1-weighted brain volume with gadolinium contrast enhancement sequences on a 3...
May 10, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29753080/palatal-position-of-patient-tracker-for-magnetic-neuronavigation-system-technical-note
#5
Giuseppe Catapano, Francesco Giovanni Sgulò, Piedad Elizabeth Acurio Padilla, Pietro Spennato, Giuseppe Di Nuzzo, Vincenzo Boniello, Matteo de Notaris
OBJECTIVE: Recently, the neuronavigation system (NS) has become an essential intraoperative tool for many neurosurgical procedures allowing for precise lesion localization. For such reason, it is particularly important to avoid errors during the navigation process. In the present study focus on a novel technique with the palatal position of patient tracker to ensure an optimal accuracy during magnetic navigation in different neurosurgical procedures. METHODS: The present retrospective study included a total of 34 patients treated in our Institution between June 2017 and January 2018...
May 9, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29750900/robot-guided-neuronavigated-repetitive-transcranial-magnetic-stimulation-rtms-in-central-neuropathic-pain-an-update-of-long-term-follow-up
#6
Charles Quesada, Benjamin Pommier, Camille Fauchon, Claire Bradley, Christelle Créac'h, François Vassal, Roland Peyron
OBJECTIVE: To confirm and extend previous results involving repetitive transcranial magnetic stimulation (rTMS) aimed at alleviating refractory central neuropathic pain(CNP). To evaluate pain relief in detail and to assess ongoing benefits after one year of treatment. DESIGN: Prospective observational study. SETTING: University hospital. Outpatient settings. PARTICIPANTS: 80 patients with chronic central pain after brain or spinal cord injuries...
May 8, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29750275/endoscopic-endonasal-transclival-approach-to-the-ventral-brainstem-anatomic-study-of-the-safe-entry-zones-combining-fiber-dissection-technique-with-7-tesla-magnetic-resonance-guided-neuronavigation
#7
Alessandro Weiss, Paolo Perrini, Matteo De Notaris, Guadalupe Soria, Alarcon Carlos, Maura Castagna, Lodovico Lutzemberger, Orazio Santo Santonocito, Giuseppe Catapano, Amin Kassam, Alberto Prats Galino
BACKGROUND: Treatment of intrinsic lesions of the ventral brainstem is a surgical challenge that requires complex skull base antero- and posterolateral approaches. More recently, endoscopic endonasal transclival approach (EETA) has been reported in the treatment of selected ventral brainstem lesions. OBJECTIVE: In this study we explored the endoscopic ventral brainstem anatomy with the aim to describe the degree of exposure of the ventral safe entry zones. In addition, we used a newly developed method combining traditional white matter dissection with high-resolution 7T magnetic resonance imaging (MRI) of the same specimen coregistered using a neuronavigation system...
May 10, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29733992/neuronavigation-guided-corticospinal-tract-mapping-in-brainstem-tumor-surgery-better-preservation-of-motor-function
#8
Zhibao Li, Mingran Wang, Liwei Zhang, Xing Fan, Xiaorong Tao, Lei Qi, Miao Ling, Xiong Xiao, Yuliang Wu, Dongze Guo, Hui Qiao
BACKGROUND: A new method in brainstem surgery, neuronavigation (NN)-guided corticospinal tract (CST) mapping, was used in a retrospective study of patients undergoing brainstem tumor surgery. METHODS: We studied 40 patients with a brainstem tumor who were enrolled in this study. Patients whose worst preoperative muscle strength of the four limbs was greater than three levels from normal on the Lovett scale were divided into two groups: a treatment group of 21 patients that included NN-guided CST mapping and routine intraoperative neurophysiology monitoring (IONM), and a control group of 19 patients that included routine NN and routine IONM...
May 4, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29733990/flat-panel-detector-computed-tomography-fdct-guided-placement-of-external-ventricular-drains-using-the-brainlab-%C3%A2-headband-and-the-precalibrated-disposable-stylet-instrument-a-cadaveric-feasibility-study
#9
Julian Feulner, Stefan Lang, Thomas Buder, Tobias Struffert, Michael Buchfelder, Sebastian Brandner
BACKGROUND: The standard freehand method for the insertion of external ventricular drains (EVD) is associated with high rates of incorrect placement. The use of neuronavigation has been shown to reduce the rates of inaccurately positioned EVDs. We present a novel neuronavigation-based approach for EVD placement using flat panel detector computed tomography (FDCT) imaging. METHODS: Four cadaveric heads were used for neuronavigated placement of EVDs using the BrainLAB® reference Headband in combination with laser surface registration and the precalibrated disposable Stylet...
May 4, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29733410/perioperative-multimodal-evaluation-and-surgical-tactics-of-tumor-related-epilepsy-2-dimensional-operative-video
#10
Chengxin Ma, Rui Feng, N U Farrukh Hameed, Jie Zhang, Dongxiao Zhuang, Jinsong Wu
Treatment of tumor-related epilepsy (TRE), especially for tumors near critical areas, requires surgeons to strike a balance between the epileptic benefit and functional outcome after surgery. Here, we present a case in which multimodal evaluation facilitated the achievement of such surgical balance. Informed patient consent was obtained. A 17-yr-old female presented with seizure attacks for 2 yr. Magnetic resonance imaging (MRI) revealed a right parietal mass lesion with hypointense signal on T1W imaging, hyperintense signal on T2W imaging, and homogeneous enhancement...
May 4, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29728818/the-3d-reconstructions-of-female-pelvic-autonomic-nerves-and-their-related-organs-based-on-mri-a-first-step-towards-neuronavigation-during-nerve-sparing-radical-hysterectomy
#11
Pengfei Li, Ping Liu, Chunlin Chen, Hui Duan, Wenjun Qiao, Oldevie Hugueth Ognami
OBJECTIVES: To present in vivo female pelvic autonomous innervation and the relationship between nerves and their related organs by three-dimensional (3D) reconstruction based on magnetic resonance imaging (MRI). METHODS: Thirty patients with cervical cancer who underwent pelvic MRI and agreed to undergo additional magnetic resonance neurography (MRN) sequences were enrolled in the present study. MRI images from the same patient were acquired using T2-weighted fat saturation (T2W FS) and 3D-STIR-SPACE sequences...
May 4, 2018: European Radiology
https://www.readbyqxmd.com/read/29726781/microsurgical-anatomy-of-the-subthalamic-nucleus-correlating-fiber-dissection-results-with-3-t-magnetic-resonance-imaging-using-neuronavigation
#12
Abuzer Güngör, Şevki Serhat Baydın, Vanessa M Holanda, Erik H Middlebrooks, Cihan Isler, Bekir Tugcu, Kelly Foote, Necmettin Tanriover
OBJECTIVE Despite the extensive use of the subthalamic nucleus (STN) as a deep brain stimulation (DBS) target, unveiling the extensive functional connectivity of the nucleus, relating its structural connectivity to the stimulation-induced adverse effects, and thus optimizing the STN targeting still remain challenging. Mastering the 3D anatomy of the STN region should be the fundamental goal to achieve ideal surgical results, due to the deep-seated and obscure position of the nucleus, variable shape and relatively small size, oblique orientation, and extensive structural connectivity...
May 4, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29719137/real-time-imaging-of-brain-tumor-for-image-guided-surgery
#13
REVIEW
Shuang Hu, Homan Kang, Yoonji Baek, Georges El Fakhri, Anren Kuang, Hak Soo Choi
The completion of surgical resection is a key prognostic factor in brain tumor treatment. This requires surgeons to identify residual tumors in theater as well as to margin the proximity of the tumor to adjacent normal tissue. Subjective assessments, such as texture palpation or visual tissue differences, are commonly used by oncology surgeons during resection to differentiate cancer lesions from normal tissue, which can potentially result in either an incomplete tumor resection, or accidental removal of normal tissue...
May 2, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29718471/microarteriovenous-malformations-value-of-indocyanine-green-fluorescence-and-nuances-of-surgical-excision-2-dimensional-operative-video
#14
Thomas J Sorenson, Lucas Carlstrom, Giuseppe Lanzino
MicroAVMs (microarteriovenous malformation) are arteriovenous shunts with a nidus smaller than 1 centimeter.1 They are typically diagnosed after hemorrhage. When the nidus is very small, diagnosis can be challenging even on catheter angiography and careful examination of the arterial and capillary phases is required to identify the early shunt. Because of the very small size, identification and localization of the actual AV shunt can be problematic during surgical exploration. Advances in frameless stereotactic neuronavigation and the introduction of intraoperative indocyanine green (ICG) fluorescein provide useful adjuncts in the surgical treatment of these relatively uncommon lesions...
April 27, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29682070/capsuloganglionic-germinoma-a-rare-site-for-uncommon-childhood-tumor
#15
Kuntal Kanti Das, Jeena Joseph, Amit Kumar Singh, Pradeep Sharma, Jayesh Sardhara, Kamlesh Singh Bhaisora, Anant Mehrotra, Arun Kumar Srivastava, Sushila Jaiswal, Rabi Narayan Sahu, Awadhesh Kumar Jaiswal, Sanjay Behari
Germ cell tumors (GCTs) are rare intracranial tumors with a strong predilection for children. Commonly, these tumors arise either in the suprasellar or the pineal region. The basal ganglia-thalamus complex represents a rare site of nonmidline intracranial GCTs. Such basal ganglionic GCTs have been reported to produce certain interesting clinico-radiological features, the knowledge of which may provide important diagnostic clues preoperatively. We present the case of a 9.5-year-old boy who presented with right hemiparesis and precocious puberty...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29682064/awake-craniotomy-with-noninvasive-brain-mapping-by-3-tesla-functional-magnetic-resonance-imaging-for-excision-of-low-grade-glioma-a-case-of-a-young-patient-from-pakistan
#16
Atta Ul Aleem Bhatti, Nasir Khan Jakhrani, Maria Adnan Parekh
The past few years have seen increasing support for gross total resection in the management of low-grade gliomas (LGGs), with a greater extent of resection correlated with better overall survival, progression-free survival, and time to malignant transformation. There is consistent evidence in literature supporting extent of safe resection as a good prognostic indicator as well as positively affecting seizure control, symptomatic relief in pressure symptoms, and longer progression-free and total survival. The operative goal in most LGG cases is to maximize the extent of resection for these benefits while avoiding postoperative neurologic deficits...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29682061/transcranial-and-epidural-approach-for-spontaneous-cerebrospinal-fluid-leakage-due-to-meningoencephalocele-of-the-lateral-sphenoid-sinus
#17
Ryosuke Shintoku, Masahiko Tosaka, Tatsuya Shimizu, Yuhei Yoshimoto
We experienced a case of sphenoid sinus type meningoencephalocele manifesting as severe cerebrospinal fluid (CSF) rhinorrhea. A 35-year-old man became aware of serous nasal discharge 1 year previously, which had gradually worsened. The nasal discharge was diagnosed as CSF rhinorrhea. Head computed tomography (CT) showed several small depressions in the bone of the left middle cranial fossa, and the largest depression extended through the bone to the lateral sphenoid sinus. Head magnetic resonance imaging revealed that the meningoencephalocele projected to the lateral sphenoid sinus, through this small bone defect of the middle cranial fossa...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29675717/electromagnetic-neuronavigation-for-the-percutaneous-treatment-of-trigeminal-neuralgia-with-balloon-compression-technical-note-and-cadaveric-validation-study
#18
Anthony Wiggins, Megan Lonie, Iona Pimentil, Nicola Newall, Peter Bodkin, Asha Venkatesh
BACKGROUND: Several techniques have been described for the percutaneous treatment of trigeminal neuralgia; however, each has significant drawbacks. We propose a new technique for percutaneous balloon compression of the trigeminal ganglion and distal trigeminal nerve using electromagnetic (EM) neuronavigation. METHODS: The procedure was performed in 17 consecutive patients with trigeminal neuralgia. Patients were then followed up with telephone interview. We also performed a cadaveric validation study to further investigate the accuracy of the technique using dye...
April 19, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29673199/thoracic-lumbar-and-sacral-pedicle-screw-placement-using-stryker-ziehm-virtual-screw-technology-and-navigated-stryker-cordless-driver-3-technical-note
#19
Praveen Satarasinghe, Kojo D Hamilton, Michael J Tarver, Robert J Buchanan, Michael T Koltz
OBJECT: Utilization of pedicle screws (PS) for spine stabilization is common in spinal surgery. With reliance on visual inspection of anatomical landmarks prior to screw placement, the free-hand technique requires a high level of surgeon skill and precision. Three-dimensional (3D), computer-assisted virtual neuronavigation improves the precision of PS placement and minimization steps. METHODS: Twenty-three patients with degenerative, traumatic, or neoplastic pathologies received treatment via a novel three-step PS technique that utilizes a navigated power driver in combination with virtual screw technology...
April 17, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29666822/accuracy-and-precision-of-a-veterinary-neuronavigation-system-for-radiation-oncology-positioning
#20
Isabelle F Vanhaezebrouck, Elizabeth A Ballegeer, Stephen Frey, Rob Sieffert
Conformal radiation treatment plans such as IMRT and other radiosurgery techniques require very precise patient positioning, typically within a millimeter of error for best results. CT cone beam, real-time navigation, and infrared position sensors are potential options for success but rarely present in veterinary radiation centers. A neuronavigation system (Brainsight Vet, Rogue Research) was tested 22 times on a skull for positioning accuracy and precision analysis. The first 6 manipulations allowed the authors to become familiar with the system but were still included in the analyses...
2018: Journal of Veterinary Medicine
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