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Bhanu Gogia, Vinodh A Kumar, Lakshmi S Chavali, Leena Ketonen, Jill Hunter, Sujit S Prabhu, Donald Schomer, L Anne Hayman
PURPOSE: Our purpose is to describe the thalamic veins using a novel approach named venous gliography in cases with primary or secondary gliomas of the thalamus. Venous gliography is defined by authors as a method to visualize veins on MRI Brain T1-weighted post contrast scans containing gliomas which have induced regional venous congestion. METHODS: Routine clinical MR Imaging studies were reviewed to assess the presence of thalamic veins in 29 glioma cases. In addition, confocal reconstruction techniques (Anatom-e and Osirix) were used in cases that had thin sections (1...
November 15, 2016: Journal of the Neurological Sciences
Daniel Schober, Nicole Schwendener, Wolf-Dieter Zech, Christian Jackowski
Segmentation of the lungs using post-mortem computed tomography (PMCT) data was so far not feasible due to post-mortem changes such as internal livores. Recently, an Osirix plug-in has been developed allowing automatically segmenting lungs also in PMCT data. The aim of this study was to investigate if the Hounsfield unit (HU) profiles obtained in PMCT data of the segmented lung tissue present with specific behaviour in relation to the cause of death. In 105 PMCT data sets of forensic cases, the entire lung volumes were segmented using the Mia Lite plug-in on Osirix...
October 20, 2016: International Journal of Legal Medicine
Cenk Murat Özer, Ibrahim Ilker Öz, Ismail Şerifoğlu, Mustafa Çağatay Büyükuysal, Çağatay Barut
The orbital aperture is the entrance to the orbit in which most important visual structures such as the eyeball and the optic nerve are found. It is vital not only for the visual system but also for the evaluation and recognition of the face. Eyeball volume is essential for diagnosing microphthalmos or buphthalmos in several eye disorders. Knowing the length of the optic nerve is necessary in selecting the right instruments for enucleation. Therefore, the aim of this study was to evaluate eyeball volume, orbital aperture, and optic nerve dimensions for a morphological description in a Turkish population sample according to gender and body side...
October 14, 2016: Journal of Craniofacial Surgery
M Savolainen, A Ritvanen, J Hukki, P Vuola, J Telkkä, J Leikola
Correction of calvarial defects after calvarial vault reconstruction (CVR) is challenging in craniosynostosis patients of advanced age and typically employs autologous bone. Demineralized bone matrix (DBM) is a potential alternative material for autologous bone, but its use has not been extended to correct calvarial defects. CVR patients operated at the Department of Plastic Surgery, Helsinki University Hospital, during 2008-2010 were retrospectively reviewed. Inclusion criteria of the study were CVR patients who received DBM plate, with or without bone dust, on calvarial defects and who had suitable uncovered defect on the contralateral side as control...
September 20, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
P Clavert, G Koch, L Neyton, P Metais, J Barth, G Walch, L Lafosse
BACKGROUND: Standard radiography with an antero-posterior view and Bernageau's glenoid profile view is the method most widely reported in the literature to assess coracoid bone block position and fusion. OBJECTIVE: The aim of this cadaver study was to determine whether the antero-posterior and Bernageau's radiographs provide a reliable and reproducible evaluation of the position of a coracoid bone block and its fixation screws. METHOD: An isolated scapula showing no evidence of osteoarthritis or other abnormalities was used...
October 4, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Eduardo Pinheiro Domingues, Rafael Fernandes Ribeiro, Martinho Campolina Rebello Horta, Flávio Ricardo Manzi, Maurício Greco Côsso, Elton Gonçalves Zenóbio
OBJECTIVE: Using computed tomography, to compare vertical and volumetric bone augmentation after interposition grafting with bovine bone mineral matrix (GEISTLICH BIO-OSS(®) ) or hydroxyapatite/tricalcium phosphate (STRAUMANN(®) BONECERAMIC) for atrophic posterior mandible reconstruction through segmental osteotomy. MATERIAL AND METHODS: Seven patients received interposition grafts in the posterior mandible for implant rehabilitation. The computed tomography cone beam images were analysed with OsiriX Imaging Software 6...
October 4, 2016: Clinical Oral Implants Research
Hanif Esmail, Tolu Oni, Friedrich Thienemann, Nashreen Omar-Davies, Robert J Wilkinson, Mpiko Ntsekhe
BACKGROUND: Cardiovascular disorders are common in HIV-1 infected persons in Africa and presentation is often insidious. Development of screening algorithms for cardiovascular disorders appropriate to a resource-constrained setting could facilitate timely referral. Cardiothoracic ratio (CTR) on chest radiograph (CXR) has been suggested as a potential screening tool but little is known about its reproducibility and stability. Our primary aim was to evaluate the stability and the inter-observer variability of CTR in HIV-1 infected outpatients...
2016: PloS One
Pedro Pedrosa Rebouças Filho, Paulo César Cortez, Antônio C da Silva Barros, Victor Hugo C Albuquerque, João Manuel R S Tavares
The World Health Organization estimates that 300 million people have asthma, 210 million people have Chronic Obstructive Pulmonary Disease (COPD), and, according to WHO, COPD will become the third major cause of death worldwide in 2030. Computational Vision systems are commonly used in pulmonology to address the task of image segmentation, which is essential for accurate medical diagnoses. Segmentation defines the regions of the lungs in CT images of the thorax that must be further analyzed by the system or by a specialist physician...
September 5, 2016: Medical Image Analysis
Paulo Eduardo Miamoto Dias, Geraldo Elias Miranda, Thiago Leite Beaini, Rodolfo Francisco Haltenhoff Melani
The oral cavity's importance in defining the facial region makes it a primary feature for forensic facial reconstruction (FFR). The aim of this study is to construct a pattern of reference for dimensions and proportions of the lips and establish parameters that may help estimate the vermilion borders' height dimensions and the mouth's width. By means of cone beam computed tomography, divided into two samples: sample 1 (n = 322; 137 male, 185 female) verified the linear distances delimited by anatomical landmarks in soft tissue...
2016: PloS One
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
Daniel Rotariu, Alexandru Budu, Ziyad Faiyad, Ion Poeata
AIM: Evaluate the role and accuracy of the virtual endoscopy realized using commercially available software, OsiriX, as a method of planning of surgical interventions. MATERIAL AND METHODS: The CTs of 22 patients with pituitary adenomas proposed for endoscopic approach were reconstructed using OsiriX. VE was performed prior surgery to assess the surgical corridor and particular anatomy. We have evaluated the following landmarks: inferior and middle turbinate, sphenoid ostia (SO), choanal arch (Ch), sphenoethmoidal recess (SER), sphenoid septa, sella turcica, carotid prominences and opticocarotid recesses (OCR)...
January 25, 2016: Turkish Neurosurgery
Toine M Lodewick, Carsten W K P Arnoldussen, Max J Lahaye, Kim M C van Mierlo, Ulf P Neumann, Regina G Beets-Tan, Cornelis H C Dejong, Ronald M van Dam
BACKGROUND: Volumetric assessment of the liver is essential in the prevention of postresectional liver failure after partial hepatectomy. Currently used methods are accurate but time-consuming. This study aimed to test a new automated method for preoperative volumetric liver assessment. METHODS: Patients who underwent a contrast enhanced portovenous phase CT-scan prior to hepatectomy in 2012 were included. Total liver volume (TLV) and future remnant liver volume (FRLV) were measured using TeraRecon Aquarius iNtuition(®) (autosegmentation) and OsiriX(®) (manual segmentation) software by two observers for each software package...
September 2016: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
Andreas Hellak, Nicola Schmidt, Michael Schauseil, Steffen Stein, Thomas Drechsler, Heike Maria Korbmacher-Steiner
BACKGROUND: The aim of this study was to use three-dimensional datasets to identify associations between treatment for adult crowding using Invisalign and interproximal enamel reduction (IER) and changes in the bone volume. METHODS: A total of 60 digital cone beam computed tomography (CBCT) scans from 30 patients (28 women, two men; 30 CBCTs pretreatment, 30 posttreatment) were examined retrospectively in order to record bone volume three-dimensionally before and after treatment...
2016: BMC Oral Health
Qasam M Ghulam, Kim K Bredahl, Jørgen B Gram, Lars Lönn, Jens P Goetze, Henrik H Sillesen, Jonas P Eiberg
OBJECTIVES: Disruption of the endothelial lining may be one of the events linking intraluminal thrombus and abdominal aortic aneurysm growth. In the present study, we examined whether von Willebrand factor activity in plasma, contact proteins of blood coagulation, and inflammatory biomarkers may be associated with intraluminal thrombus volume in search of a biochemical marker of endothelial damage and thrombus size. DESIGN: Prospective study, correlating potential endothelial biomarkers and intraluminal thrombus volume acquired by computed tomography angiography...
August 2016: Vascular and Endovascular Surgery
David S C Soon, Michael P Chae, Charles H C Pilgrim, Warren Matthew Rozen, Robert T Spychal, David J Hunter-Smith
INTRODUCTION AND BACKGROUND: Three dimensional (3D) printing has gained popularity in the medical field because of increased research in the field of haptic 3D modeling. We review the role of 3D printing with specific reference to liver directed applications. METHODS: A literature search was performed using the scientific databases Medline and PubMed. We performed this in-line with the PRISMA [20] statement. We only included articles in English, available in full text, published about adults, about liver surgery and published between 2005 and 2015...
September 2016: Annals of Medicine and Surgery
Ha Nguyen, Karl Janich, Ashish Sharma, Mohit Patel, Wade Mueller
INTRODUCTION: The fate of the bone flap is a significant decision during surgical treatment of acute subdural hematoma (SDH). A general guideline revolves around the surgeon's concern for brain edema. However, limited studies have focused on the factors that contribute to perioperative brain edema. We proposed that assessment of brain volume via CT imaging in patients without bone flaps is a reasonable model to study brain edema. METHODS: From 2012 to 2015, 38 patients who underwent decompressive craniectomy for acute SDH were reviewed...
July 28, 2016: World Neurosurgery
Shumei Murakami, Rinus G Verdonschot, Miyoshi Kataoka, Naoya Kakimoto, Hiroaki Shimamoto, Sven Kreiborg
OBJECTIVES: Metallic compounds present in the oral and maxillofacial regions (OMRs) cause large artefacts during MR scanning. We quantitatively assessed these artefacts embedded within a phantom according to standards set by the American Society for Testing and Materials (ASTM). METHODS: Seven metallic dental materials (each of which was a 10-mm(3) cube embedded within a phantom) were scanned [i.e. aluminium (Al), silver alloy (Ag), type IV gold alloy (Au), gold-palladium-silver alloy (Au-Pd-Ag), titanium (Ti), nickel-chromium alloy (NC) and cobalt-chromium alloy (CC)] and compared with a reference image...
August 19, 2016: Dento Maxillo Facial Radiology
Mika Salmi
Most of the 3D printing applications of preoperative models have been focused on dental and craniomaxillofacial area. The purpose of this paper is to demonstrate the possibilities in other application areas and give examples of the current possibilities. The approach was to communicate with the surgeons with different fields about their needs related preoperative models and try to produce preoperative models that satisfy those needs. Ten different kinds of examples of possibilities were selected to be shown in this paper and aspects related imaging, 3D model reconstruction, 3D modeling, and 3D printing were presented...
2016: Journal of Medical Engineering
Ha Son Nguyen, Luyuan Li, Mohit Patel, Wade Mueller
BACKGROUND: Extra-axial hematoma can cause significant brain compression. Guidelines for surgical evacuation include imaging findings (midline shift and hematoma thickness/volume) in conjunction with Glasgow Coma Scale (GCS) scores and/or intracranial pressure (ICP) monitoring. Physiologically, overall brain density should also change with compression. In our observational study, we explored whether overall brain density, defined using computed tomography Hounsfield Units (CT HU), changes after surgical evacuation of extra-axial hematoma...
October 2016: Neuroradiology Journal
Teddy Y Wu, Oluwaseun Sobowale, Robert Hurford, Gagan Sharma, Søren Christensen, Nawaf Yassi, Turgut Tatlisumak, Patricia M Desmond, Bruce C V Campbell, Stephen M Davis, Adrian R Parry-Jones, Atte Meretoja
INTRODUCTION: Haematoma and oedema size determines outcome after intracerebral haemorrhage (ICH), with each added 10 % volume increasing mortality by 5 %. We assessed the reliability of semi-automated computed tomography planimetry using Analyze and Osirix softwares. METHODS: We randomly selected 100 scans from 1329 ICH patients from two centres. We used Hounsfield Unit thresholds of 5-33 for oedema and 44-100 for ICH. Three raters segmented all scans using both softwares and 20 scans repeated for intra-rater reliability and segmentation timing...
September 2016: Neuroradiology
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