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https://www.readbyqxmd.com/read/27918961/the-promise-of-subtraction-ictal-spect-co-registered-to-mri-for-improved-seizure-localization-in-pediatric-epilepsies-affecting-factors-and-relationship-to-the-surgical-outcome
#1
Catherine Stamoulis, Nishant Verma, Himanshu Kaulas, Jonathan J Halford, Frank H Duffy, Phillip L Pearl, S Ted Treves
OBJECTIVE: Ictal SPECT is promising for accurate non-invasive localization of the epileptogenic brain tissue in focal epilepsies. However, high quality ictal scans require meticulous attention to the seizure onset. In a relatively large cohort of pediatric patients, this study investigated the impact of the timing of radiotracer injection, MRI findings and seizure characteristics on ictal SPECT localizations, and the relationship between concordance of ictal SPECT, scalp EEG and resected area with seizure freedom following epilepsy surgery...
November 30, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27915065/assessment-of-white-matter-transgression-during-neuroendoscopic-procedures-using-dti-fiber-tracking
#2
Sergio García, Jordina Rincon-Torroella, Arnau Benet, Laura Oleaga, José Juan González Sánchez
BACKGROUND: Presurgical planning allows anticipating intraoperative difficulties, increasing efficiency, and reducing risks. Neuroendoscopy is a minimally invasive technique whose related complications have been focused on cortical function and surface vessels injury. However, white matter disruption has been insufficiently acknowledged. OBJECTIVE: To present a new surgical planning method based on diffusion tensor image that allows quantifying subcortical transgression and optimizing neuroendoscopic trajectories...
November 30, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27878636/imaging-of-secretory-tumors-of-the-gastrointestinal-tract
#3
REVIEW
Yehia M ElGuindy, Sanaz Javadi, Christine O Menias, Corey T Jensen, Haitham Elsamaloty, Khaled M Elsayes
Gastrointestinal secretory tumors, or gastroenteropancreatic neuroendocrine tumors, encompass a wide array of endocrine cell tumors. The significance of these tumors lies in their ability to alter physiology through hormone production as we well as in their malignant potential. Functioning tumors may present earlier due to symptomatology; conversely, non-functioning tumors are often diagnosed late as they reach large sizes, causing symptoms secondary to local mass effect. Imaging aids in the diagnosis, staging, and prognosis and provides key information for presurgical planning...
November 23, 2016: Abdominal Radiology
https://www.readbyqxmd.com/read/27865802/improving-the-medical-curriculum-in-predoctoral-dental-education-recommendations-from-the-american-association-of-oral-and-maxillofacial-surgeons-committee-on-predoctoral-education-and-training
#4
Matthew J Dennis, Jeffrey D Bennett, Dean M DeLuke, Erik W Evans, John W Hudson, Anders Nattestad, Gregory M Ness, Allison Yeung
Dental procedures are often performed on patients who present with some level of medical fragility. In many dental schools, the exercise of taking a medical history is all too often a transcription of information to the dental chart, with little emphasis on the presurgical risk assessment and the development of a treatment plan appropriate to the medical status of the dental patient. Changes in dentistry, driven by an increasingly medically complex population of dental patients, combined with treatment advances rooted in the biomedical sciences necessitate the adaptation of our dental education to include a stronger background in systemic health...
October 26, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27833903/virtual-3d-modeling-of-airways-in-congenital-heart-defects
#5
Simone Speggiorin, Saravanan Durairaj, Branko Mimic, Antonio F Corno
The involvement of the airway is not uncommon in the presence of complex cardiovascular malformations. In these cases, a careful inspection of the relationship between the airway and the vasculature is paramount to plan the surgical procedure. Three-dimensional printing enhanced the visualization of the cardiovascular structure. Unfortunately, IT does not allow to remove selected anatomy to improve the visualization of the surrounding ones. Computerized modeling has the potential to fill this gap by allowing a dynamic handling of different anatomies, increasing the exposure of vessels or bronchi to show their relationship...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27824719/radiographic-fractal-and-clinical-resonance-frequency-analyses-of-posterior-mandibular-dental-implants-their-possible-association-with-mandibular-cortical-index-with-12-month-follow-up
#6
Tolga F Tözüm, Erhan Dursun, Serdar Uysal
BACKGROUND: The aim of the present study was to investigate whether the mandibular cortical index (MCI) has a relationship with fractal dimension of bone and/or implant stability, and to justify the possible association between MCI, fractal dimension, and stability. MATERIALS AND METHODS: Eighty-two subjects who received dental implants to replace missing mandibular premolar/molar sites were selected. Three months after surgical placement, implants were restored with fixed ceramic fused metal crowns...
December 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27781402/automated-femoral-landmark-extraction-for-optimal-prosthesis-placement-in-total-hip-arthroplasty
#7
D F Almeida, R B Ruben, J Folgado, P R Fernandes, J Gamelas, B Verhegghe, M De Beule
The automated extraction of anatomical reference landmarks in the femoral volume may improve speed, precision and accuracy of surgical procedures, such as total hip arthroplasty. These landmarks are often hard to achieve, even via surgical incision. In addition, it provides a presurgical guidance for prosthesis sizing and placement. This study presents an automated workflow for femoral orientation and landmark extraction from a 3D surface mesh. The extraction of parameters such as the femoral neck axis, the femoral middle diaphysis axis, both trochanters and the center of the femoral head will allow the surgeon to establish the correct position of bony cuts to restore leg length and femoral offset...
October 25, 2016: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/27768542/why-thyroid-surgeons-are-frustrated-with-radiologists-lessons-learned-from-pre-and-postoperative-us
#8
Sachin S Kumbhar, Ryan B O'Malley, Tracy J Robinson, Suresh Maximin, Neeraj Lalwani, David R Byrd, Carolyn L Wang
Optimal treatment of thyroid cancer is highly dependent on accurate staging of the extent of disease at presentation. Preoperative ultrasonography (US) is the most sensitive method for detecting metastatic lymph nodes and is recommended as part of the standard preoperative workup. Missed findings on preoperative scans may lead to understaging and inadequate surgical management, which subsequently predispose these patients to residual disease postoperatively and a higher risk for recurrence, possibly requiring repeat surgery...
October 21, 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27759998/presurgical-evaluation-of-bony-implant-sites-using-panoramic-radiography-and-cone-beam-computed-tomography-influence-of-medical-education
#9
Michael Dau, Amir Edalatpour, Ralf Schulze, Bilal Al-Nawas, Abdulmonem Alshihri, Peer W Kämmerer
OBJECTIVES: The aim of this study was to compare the subjective quality rating of panoramic radiography (PAN) and cone beam computed tomography (CBCT) in planning of dental implant procedures by clinicians with different educational background. METHODS: Radiographic images (PAN and CBCT) of 42 patients were examined as follows: 10 maxillary (MX) anterior region, 16 MX posterior region and 16 mandibular (MD) posterior region. These sites were used for planning of dental implant insertion...
October 19, 2016: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/27742256/evaluation-of-the-factors-influencing-brain-language-laterality-in-presurgical-planning
#10
Seyed Amir Hossein Batouli, Nafiseh Hasani, Sara Gheisari, Ebrahim Behzad, Mohammad Ali Oghabian
Brain lesions cause functional deficits, and one treatment for this condition is lesion resection. In most cases, presurgical planning (PSP) and the information from laterality indices are necessary for maximum preservation of the critical functions after surgery. Language laterality index (LI) is reliably estimated using functional magnetic resonance imaging (fMRI); however, this measure is under the influence of some external factors. In this study, we investigated the influence of a number of factors on language LI, using data from 120 patients (mean age=35...
October 11, 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27740987/imaging-of-brain-tumors
#11
Mirza A Baig, Joshua P Klein, Laszlo L Mechtler
PURPOSE OF REVIEW: Neuroimaging is an essential tool for the diagnosis and management of brain tumors. RECENT FINDINGS: Advances in neuroimaging have allowed for noninvasive visualization of tumors and have changed how brain tumors are diagnosed and treated. Presurgical planning with the use of functional MRI (fMRI) and diffusion tensor MRI helps to preserve eloquent regions of the brain and fiber tracts, thereby decreasing patients' postsurgical morbidity. With the use of susceptibility-weighted imaging (SWI) filtered phase images, diffusion-weighted studies, and perfusion imaging techniques, deciphering posttreatment effects versus tumor progression can be facilitated...
October 2016: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/27668182/unusual-atypical-language-lateralization
#12
Muhammad T Khan, Roger Oghlakian, Mohamad Z Koubeissi
Determining the language-dominant hemisphere is essential for planning epilepsy surgery. A 60-year-old right-handed woman with epilepsy since age 16 failed a partial right anterior lobectomy at age 21. Later, a brain MRI found extensive right-sided cortical dysplasia and periventricular heterotopia. Subsequently, prolonged video-EEG monitoring localized her seizures to the right temporoparietal region. Functional MRI was inconclusive in lateralizing her language, prompting a Wada test, which strongly lateralized language to the right...
2016: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/27659824/advanced-mr-imaging-in-hemispheric-low-grade-gliomas-before-surgery-the-indications-and-limits-in-the-pediatric-age
#13
Simona Gaudino, Rosellina Russo, Tommaso Verdolotti, Massimo Caulo, Cesare Colosimo
INTRODUCTION: Advanced magnetic resonance imaging (MRI) techniques is an umbrella term that includes diffusion (DWI) and diffusion tensor (DTI), perfusion (PWI), spectroscopy (MRS), and functional (fMRI) imaging. These advanced modalities have improved the imaging of brain tumors and provided valuable additional information for treatment planning. Despite abundant literature on advanced MRI techniques in adult brain tumors, few reports exist for pediatric brain ones, potentially because of technical challenges...
October 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27659823/cerebral-hemispheric-low-grade-glial-tumors-in-children-preoperative-anatomic-assessment-with-mri-and-dti
#14
REVIEW
Charles Raybaud
PURPOSE: The aims of this study are to analyze how the nature and the behavior of low-grade glial tumors (LGGT) in children may correlate with the anatomy of the cerebral hemispheres and to evaluate the consequent impact of diffusion tensor imaging (DTI) techniques in the presurgical assessment. METHODS: This is a combined review of a series of 155 cases of LGGT and of the recent literature on the subject. RESULTS: The cases retrieved from our data bank were divided in central hemispheric tumors (basal ganglia and thalami) (36 cases), glioneuronal cortical-based tumors (49 cases), and glial tumors of the cerebral mantle (70 cases)...
October 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27633639/exploring-effects-of-presurgical-weight-loss-among-women-with-stage-0-ii-breast-cancer-protocol-for-a-randomised-controlled-feasibility-trial
#15
Yuko Tsuruta, Laura Q Rogers, Helen Krontiras, William E Grizzle, Andrew D Frugé, Robert A Oster, Heidi R Umphrey, Lee W Jones, Maria Azrad, Wendy Demark-Wahnefried
INTRODUCTION: Obesity is a known risk factor for postmenopausal breast cancer and is associated with poorer prognosis for premenopausal and postmenopausal patients; however, the aetiological mechanisms are unknown. Preclinical studies support weight loss via caloric restriction and increased physical activity as a possible cancer control strategy, though few clinical studies have been conducted. We undertook a feasibility trial among women recently diagnosed with stage 0-II breast cancer hypothesising that presurgical weight loss would be feasible, safe and result in favourable changes in tumour markers and circulating biomarkers...
September 15, 2016: BMJ Open
https://www.readbyqxmd.com/read/27630506/orthodontic-orthognathic-interventions-in-orthognathic-surgical-cases-paper-surgery-and-model-surgery-concepts-in-surgical-orthodontics
#16
Narayan H Gandedkar, Chai Kiat Chng, Vincent Kok Leng Yeow
Thorough planning and execution is the key for successful treatment of dentofacial deformity involving surgical orthodontics. Presurgical planning (paper surgery and model surgery) are the most essential prerequisites of orthognathic surgery, and orthodontist is the one who carries out this procedure by evaluating diagnostic aids such as crucial clinical findings and radiographic assessments. However, literature pertaining to step-by-step orthognathic surgical guidelines is limited. Hence, this article makes an attempt to provide an insight and nuances involved in the planning and execution...
July 2016: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/27616536/tooth-size-discrepancies-in-patients-requiring-mandibular-advancement-surgery
#17
Andrew Hanna, Edward Ellis
PURPOSE: Numerous studies have shown that tooth size is an important key to ideal occlusion. Bolton (Angle Orthod 28:13, 1958; 48:504, 1962) described a constant ratio between the widths of the upper and lower teeth that must be present to achieve an optimal occlusion. The purpose of this study was to determine the incidence of Bolton discrepancies in patients with Class II malocclusion scheduled for mandibular advancement surgery. PATIENTS AND METHODS: This study included 126 patients (40 male, 86 female) with Class II malocclusion who had at least a mandibular advancement as part of their surgical treatment...
December 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27602255/imaging-techniques-for-clinical-burn-assessment-with-a-focus-on-multispectral-imaging
#18
Jeffrey E Thatcher, John J Squiers, Stephen C Kanick, Darlene R King, Yang Lu, Yulin Wang, Rachit Mohan, Eric W Sellke, J Michael DiMaio
Significance: Burn assessments, including extent and severity, are some of the most critical diagnoses in burn care, and many recently developed imaging techniques may have the potential to improve the accuracy of these evaluations. Recent Advances: Optical devices, telemedicine, and high-frequency ultrasound are among the highlights in recent burn imaging advancements. We present another promising technology, multispectral imaging (MSI), which also has the potential to impact current medical practice in burn care, among a variety of other specialties...
August 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/27599482/canine-atlantoaxial-optimal-safe-implantation-corridors-description-and-validation-of-a-novel-3d-presurgical-planning-method-using-osirix%C3%A2
#19
Guillaume Leblond, Luis Gaitero, Noel M Moens, Alex Zur Linden, Fiona M K James, Gabrielle Monteith, John Runciman
BACKGROUND: Canine ventral atlantoaxial (AA) stabilization is most commonly performed in very small dogs and is technically challenging due to extremely narrow bone corridors. Multiple implantation sites have been suggested but detailed anatomical studies investigating these sites are lacking and therefore current surgical guidelines are based upon approximate anatomical landmarks. In order to study AA optimal safe implantation corridors (OSICs), we developed a method based on computed tomography (CT) and semi-automated three-dimensional (3D) mathematical modelling using OsiriX™ and Microsoft®Excel software...
2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27567464/correlating-magnetoencephalography-to-stereo-electroencephalography-in-patients-undergoing-epilepsy-surgery
#20
Hiroatsu Murakami, Zhong I Wang, Ahmad Marashly, Balu Krishnan, Richard A Prayson, Yosuke Kakisaka, John C Mosher, Juan Bulacio, Jorge A Gonzalez-Martinez, William E Bingaman, Imad M Najm, Richard C Burgess, Andreas V Alexopoulos
Magnetoencephalography and stereo-electroencephalography are often necessary in the course of the non-invasive and invasive presurgical evaluation of challenging patients with medically intractable focal epilepsies. In this study, we aim to examine the significance of magnetoencephalography dipole clusters and their relationship to stereo-electroencephalography findings, area of surgical resection, and seizure outcome. We also aim to define the positive and negative predictors based on magnetoencephalography dipole cluster characteristics pertaining to seizure-freedom...
August 26, 2016: Brain: a Journal of Neurology
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