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https://www.readbyqxmd.com/read/27911234/ventriculostomy-associated-hemorrhage-a-risk-assessment-by-radiographic-simulation
#1
Faith C Robertson, Muhammad M Abd-El-Barr, Srinivasan Mukundan, William B Gormley
OBJECTIVE Ventriculostomy entry sites are commonly selected by freehand estimation of Kocher's point or approximations from skull landmarks and a trajectory toward the ipsilateral frontal horn of the lateral ventricles. A recognized ventriculostomy complication is intracranial hemorrhage from cortical vessel damage; reported rates range from 1% to 41%. In this report, the authors assess hemorrhagic risk by simulating traditional ventriculostomy trajectories and using CT angiography (CTA) with venography (CTV) data to identify potential complications, specifically from cortical draining veins...
December 2, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27910586/a-novel-method-to-recover-dd-fusion-proton-cr-39-data-corrupted-by-fast-ablator-ions-at-omega-and-the-national-ignition-facility
#2
G D Sutcliffe, L M Milanese, D Orozco, B Lahmann, M Gatu Johnson, F H Séguin, H Sio, J A Frenje, C K Li, R D Petrasso, H-S Park, J R Rygg, D T Casey, R Bionta, D P Turnbull, C M Huntington, J S Ross, A B Zylstra, M J Rosenberg, V Yu Glebov
CR-39 detectors are used routinely in inertial confinement fusion (ICF) experiments as a part of nuclear diagnostics. CR-39 is filtered to stop fast ablator ions which have been accelerated from an ICF implosion due to electric fields caused by laser-plasma interactions. In some experiments, the filtering is insufficient to block these ions and the fusion-product signal tracks are lost in the large background of accelerated ion tracks. A technique for recovering signal in these scenarios has been developed, tested, and implemented successfully...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910309/spatial-resolution-measurements-of-the-advanced-radiographic-capability-x-ray-imaging-system-at-energies-relevant-to-compton-radiography
#3
G N Hall, N Izumi, O L Landen, R Tommasini, J P Holder, D Hargrove, D K Bradley, A Lumbard, J G Cruz, K Piston, J J Lee, E Romano, P M Bell, A C Carpenter, N E Palmer, B Felker, V Rekow, F V Allen
Compton radiography provides a means to measure the integrity, ρR and symmetry of the DT fuel in an inertial confinement fusion implosion near peak compression. Upcoming experiments at the National Ignition Facility will use the ARC (Advanced Radiography Capability) laser to drive backlighter sources for Compton radiography experiments and will use the newly commissioned AXIS (ARC X-ray Imaging System) instrument as the detector. AXIS uses a dual-MCP (micro-channel plate) to provide gating and high DQE at the 40-200 keV x-ray range required for Compton radiography, but introduces many effects that contribute to the spatial resolution...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910305/comparison-of-polystyrene-scintillator-fiber-array-and-monolithic-polystyrene-for-neutron-imaging-and-radiography
#4
R Simpson, T E Cutler, C R Danly, M A Espy, J H Goglio, J F Hunter, A C Madden, D R Mayo, F E Merrill, R O Nelson, A L Swift, C H Wilde, T G Zocco
The neutron imaging diagnostic at the National Ignition Facility has been operating since 2011 generating neutron images of deuterium-tritium (DT) implosions at peak compression. The current design features a scintillating fiber array, which allows for high imaging resolution to discern small-scale structure within the implosion. In recent years, it has become clear that additional neutron imaging systems need to be constructed in order to provide 3D reconstructions of the DT source and these additional views need to be on a shorter line of sight...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27906740/a-new-method-of-measuring-the-occipitocervical-angle-that-could-be-applied-as-an-intraoperative-indicator-during-occipitocervical-fusion
#5
Shingo Nagashima, Masateru Nagae, Yuji Arai, Hitoshi Tonomura, Ryota Takatori, Tsuyoshi Sukenari, Hiroyoshi Fujiwara, Koshiro Sawada, Yasuo Mikami, Toshikazu Kubo
STUDY DESIGN: A method for measuring occipitocervical angle. OBJECTIVE: To develop a new method of measurement for assessing the occipitocervical angle using intraoperative fluoroscopic imaging, and to examine its reliability. SUMMARY OF BACKGROUND DATA: To avoid postoperative complications following occipitocervical fusion, it is vital to obtain a suitable fusion angle between the occipital bone and the upper cervical spine. MATERIALS AND METHODS: The subjects were 30 cases with occipito-atlanto-axial lesions and 30 healthy volunteers...
November 30, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27901480/timp-2-snps-rs7342880-and-rs4789936-are-linked-to-risk-of-knee-osteoarthritis-in-the-chinese-han-population
#6
Pengcheng Xu, Wen Guo, Tianbo Jin, Jihong Wang, Dongsheng Fan, Zengtao Hao, Shangfei Jing, Chao-Qian Han, Jieli Du, Dong Jiang, Shuzheng Wen, Jianzhong Wang
This study aimed to investigate whether functional polymorphisms in the tissue inhibitors of metalloproteinase-2 (TIMP-2) gene are associated with susceptibility to knee osteoarthritis (OA) in the Chinese Han population. Six TIMP-2 single nucleotide polymorphisms (SNPs) were assayed using MassARRAY in 300 patients clinically and radiographically diagnosed with knee OA and in 428 controls. Allelic and genotypic frequencies were compared between groups. Logistic regression adjusting for age and gender was used to estimate risk associations between specific genotypes and knee OA by computing odds ratios (ORs) and 95% confidence intervals (95% CIs)...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27900295/diagnostic-performance-of-volume-and-limited-oblique-mri-of-the-anterior-cruciate-ligament-compared-to-knee-arthroscopy
#7
Paula J Richards, Iain McCall, Alexandra Kraus, Mary Jones, Gayle Maffulli, Stephen Bridgman, Nicola Maffulli
BACKGROUND: Many strategies have been used to improve the visualisation of the ACL including sagittal, coronal oblique sequences, and 3D volume imaging. Nevertheless, the ACL may not always be visualised. METHODS: Two hundred and thirty-one consecutive patients (77 females; 154 males; average age 43.5, range 18 to 82 years; 205 with chronic, 20 acute, and 6 acute on chronic symptoms) underwent knee arthroscopy for mechanical symptoms within a week of MRI. After routine orthogonal sequences, if general MRI radiographers, with over four years experience, were not able to identify the presence of the ACL, then two 3D volume sequences and 2D limited sagittal oblique T1 sequences were performed...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27891451/assessing-the-reliability-of-digitalized-cephalometric-analysis-in-comparison-with-manual-cephalometric-analysis
#8
Mohammed Umar Farooq, Mohd Asadullah Khan, Shahid Imran, Ayesha Sameera, Arshad Qureshi, Syed Afroz Ahmed, Sujan Kumar, Mohd Aziz Ur Rahman
INTRODUCTION: For more than seven decades orthodontist used cephalometric analysis as one of the main diagnostic tools which can be performed manually or by software. The use of computers in treatment planning is expected to avoid errors and make it less time consuming with effective evaluation and high reproducibility. AIM: This study was done to evaluate and compare the accuracy and reliability of cephalometric measurements between computerized method of direct digital radiographs and conventional tracing...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891261/perioprosthetic-and-implant-supported-rehabilitation-of-complex-cases-clinical-management-and-timing-strategy
#9
Luca Landi, Stefano Piccinelli, Roberto Raia, Fabio Marinotti, Paolo Francesco Manicone
Treatment of complex perioprosthetic cases is one of the clinical challenges of everyday practice. Only a complete and thorough diagnostic setup may allow the clinician to formulate a realistic prognosis to select the abutments to support prosthetic rehabilitation. Clinical, radiographic, or laboratory parameters used separately are useless to correctly assign a reliable prognosis to single teeth except in the case of a clearly hopeless tooth. Therefore, it is crucial to gather the greatest quantity of data to determine the role that every single element can play in the prosthetic rehabilitation of the case...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27889406/is-surgeons-experience-important-on-intra-and-inter-observer-reliability-of-classifications-used-for-adult-femoral-neck-fracture
#10
Ali Turgut, Mert Kumbaracı, Önder Kalenderer, Gökhan İlyas, Tayfun Bacaksız, Levent Karapınar
PURPOSE: To evaluate whether surgeons' experience affect inter- and intra-observer reliability among mostly used classification systems for femoral neck fractures. MATERIAL AND METHODS: A power point presentation was prepared with 107 slides which were antero-posterior radiographs of each femoral neck fracture. Five residents, 5 orthopaedic surgeons and 5 senior orthopaedic surgeons reviewed this presentation and classified the fractures according to Garden, Pauwels and AO classifications...
November 23, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27889036/diagnosis-and-diagnostic-imaging-of-anal-canal-cancer
#11
REVIEW
Kristen K Ciombor, Randy D Ernst, Gina Brown
Anal canal cancer is an uncommon malignancy but one that is often curable with optimal therapy. Owing to its unique location, histology, risk factors, and usual presentation, a careful diagnostic approach is warranted. This approach includes an excellent history and physical examination, including digital rectal examination, laboratory data, and comprehensive imaging. Anal cancer staging and formulation of a treatment plan depends on accurate imaging data. Modern radiographic techniques have improved staging quality and accuracy, and a thorough knowledge of anal anatomy is paramount to the optimal multidisciplinary treatment of this disease...
January 2017: Surgical Oncology Clinics of North America
https://www.readbyqxmd.com/read/27888851/aftermath-of-ankle-inversion-injuries-spectrum-of-mr-imaging-findings
#12
REVIEW
Timothy M Meehan, Edgar Leonardo Martinez-Salazar, Martin Torriani
Acute and chronic ankle inversion injuries are a common source of pain and a diagnostic challenge. Several studies have shown a variety of injury patterns after inversion injury both in acute and chronic settings. Although traditional assessment with clinical examination and radiographs is generally accepted for inversion injuries, MR imaging is a useful tool to detect occult injuries and in patients with chronic symptoms. This article examines a range of MR imaging findings that may be present in patients with lateral ankle pain following an acute or chronic inversion injury...
February 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/27885093/proposals-for-the-establishment-of-national-diagnostic-reference-levels-for-radiography-for-adult-patients-based-on-regional-dose-surveys-in-russian-federation
#13
A V Vodovatov, M I Balonov, V Yu Golikov, I G Shatsky, L A Chipiga, C Bernhardsson
In 2009-2014, dose surveys aimed to collect adult patient data and parameters of most common radiographic examinations were performed in six Russian regions. Typical patient doses were estimated for the selected examinations both in entrance surface dose and in effective dose. 75%-percentiles of typical patient effective dose distributions were proposed as preliminary regional diagnostic reference levels (DRLs) for radiography. Differences between the 75%-percentiles of regional typical patient dose distributions did not exceed 30-50% for the examinations with standardized clinical protocols (skull, chest and thoracic spine) and a factor of 1...
November 24, 2016: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/27884861/diagnostic-accuracy-of-the-ottawa-ankle-and-midfoot-rules-a-systematic-review-with-meta-analysis
#14
Paula R Beckenkamp, Chung-Wei Christine Lin, Petra Macaskill, Zoe A Michaleff, Chris G Maher, Anne M Moseley
OBJECTIVE: To review the diagnostic accuracy of the Ottawa Ankle and Midfoot Rules and explore if clinical features and/or methodological quality of the study influence diagnostic accuracy estimates. DESIGN: Systematic review with meta-analysis. DATA SOURCES: MEDLINE, EMBASE, CINAHL, SPORTDiscus and Cochrane Library. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Primary diagnostic studies reporting the accuracy of the Rules in people with ankle and/or midfoot injury were retrieved...
November 24, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27884633/recent-trends-in-imaging-use-in-hospital-settings-implications-for-future-planning
#15
David C Levin, Laurence Parker, Vijay M Rao
PURPOSE: To compare trends in utilization rates of imaging in the three hospital-based settings where imaging is conducted. METHODS: The nationwide Medicare Part B databases for 2004-2014 were used. All discretionary noninvasive diagnostic imaging (NDI) CPT codes were selected and grouped by modality. Procedure volumes of each code were available from the databases and converted to utilization rates per 1,000 Medicare enrollees. Medicare's place-of-service codes were used to identify imaging examinations done in hospital inpatients, hospital outpatient departments (HOPDs), and emergency departments (EDs)...
November 21, 2016: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/27884321/the-role-of-computed-tomography-after-emergent-trauma-operation
#16
Kazuhide Matsushima, Kenji Inaba, Ryan Dollbaum, Desmond Khor, Vidhi Jhaveri, Omar Jimenez, Aaron Strumwasser, Demetrios Demetriades
BACKGROUND: Although computed tomography (CT) has become the preferred diagnostic modality, immediate surgical intervention is often required for severely injured patients with minimum preoperative radiographic evaluation. The utility of postoperative CT (postop-CT) for the identification of undiagnosed injuries and its impact on patient management remain unclear. The purpose of this study was to evaluate the utility of postop-CT for the identification of clinically significant injuries in patients who underwent an emergent life-saving procedure...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27882239/desmoplastic-fibroma-of-the-distal-tibia-a-case-report-of-a-minimally-invasive-histological-diagnosis
#17
Gabriele Levrini, Pierpaolo Pattacini
Desmoplastic fibroma (DF) is a benign, rare fibroblastic intraosseous neoplasm histologically resembling a desmoid soft tissue tumor. Although classified as benign, DF frequently exhibits an aggressive behavior, has a moderate-to-high recurrence rate, and often causes pathological fractures and extensive bone destruction. This case report presents an incidentally detected DF of the tibia, which was diagnosed using a minimally invasive approach. A 36-year-old African female patient was referred to the Department of Diagnostic Imaging of Arcispedale Santa Maria Nuova-IRCCS (Reggio Emilia, Italy), to be examined by a computed tomography scan on an outpatient basis, after an x-ray examination of the tibia, which was performed after an injury to exclude the presence of a fracture, revealed a hyperlucency of unknown origin...
November 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27872724/are-magnetic-resonance-imaging-or-radiographic-findings-correlated-with-clinical-prognosis-in-spinal-cord-neuropathy
#18
Fatemeh Neshat Halati, Alireza Vajhi, Mohammad Molazem, Mohammad Mehdi Dehghan, Fereshteh Ansari
Dogs presented to the Small Animal Hospital of Veterinary Medicine, University of Tehran were included in the present study if spinal or intervertebral disc involvement was suspected. Clinical signs were recorded as well as general information of the patient such as age, breed and sex. Sixty dogs were examined radiographically and two standard orthogonal lateral and ventrodorsal projections were taken from the suspected region. Then magnetic resonance imaging (MRI) was performed for all patients. Agreement between MRI and radiographic findings, comparison of sex and breed with diagnostic imaging grades, comparison between diagnostic imaging grades and mean age, recovery rate after surgery or medical treatment, effects of diagnostic imaging severity grades on surgical or medical referrals were evaluated statistically...
2016: Veterinary Research Forum
https://www.readbyqxmd.com/read/27871582/glucagon-induced-hypertensive-emergency-a-case-report
#19
Aron Legler, Richard K Kim, Nikhil Chawla
Glucagon is well acknowledged as a sphincter of Oddi relaxant for both diagnostic and therapeutic uses in choledocholithiasis, and an empiric treatment for β-blocker overdose. Although it has been implicated in inducing cardiovascular crises in patients with asymptomatic pheochromocytoma, adverse effects in other patient populations have not been characterized. This case report describes a patient with hypertension controlled on β blockers who, after glucagon administration during an intraoperative cholangiography, experienced hypertensive emergency despite adequate pain control...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27863623/tuberculous-lymphadenitis-of-the-head-and-neck-in-canadian-children-experience-from-a-low-burden-region
#20
Jason J Xu, Shazia Peer, Blake C Papsin, Ian Kitai, Evan J Propst
BACKGROUND: Children are more likely than adults to develop extra-pulmonary tuberculosis (EPTB), which often presents as cervical lymphadenopathy. The role of surgery in management is uncertain. We reviewed all head and neck EPTB cases presenting to our tertiary care pediatric institution over a twelve-year period. METHODS: All children 18 years of age and younger with EPTB involving the head and neck were included. We recorded clinical data and age at diagnosis, birth country, BCG vaccination status, as well as radiographic, surgical, histological, and microbiological results...
December 2016: International Journal of Pediatric Otorhinolaryngology
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