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Segmental anatomy

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https://www.readbyqxmd.com/read/28319535/validation-of-therapeutic-anatomy-oriented-classification-in-endosseous-dental-implant-treatment-a-pilot-study
#1
Marius Kubilius, Yagmur Deniz Ilarslan, Tolga F Tözüm, Hom-Lay Wang, Ričardas Kubilius, Gintaras Juodzbalys
BACKGROUND: The purpose of the study was to validate a newly proposed therapeutic anatomically based clinical and radiological classification for dental implant treatment. METHODS: Eighty-one patients with at least 1 edentulous jaw segment (EJS) from 2 dental clinics were included in this study. Both clinical and radiological parameters were assessed in aesthetic and nonaesthetic zones. The data were then compared at preoperative, intraoperative, and postoperative (subdivided into early and late stage) study stages...
April 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28317393/structural-analysis-of-two-different-stent-configurations
#2
M Simão, J M Ferreira, J Mora-Rodriguez, H M Ramos
Two different stent configurations (i.e. the well known Palmaz-Schatz (PS) and a new stent configuration) are mechanically investigated. A finite element model was used to study the two geometries under combining loads and a computational fluid dynamic model based on fluid structure interaction was developed investigating the plaque and the artery wall reactions in a stented arterial segment. These models determine the stress and displacement fields of the two stents under internal pressure conditions. Results suggested that stent designs cause alterations in vascular anatomy that adversely affect arterial stress distributions within the wall, which have impact in the vessel responses such as the restenosis...
March 20, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28316884/three-dimensional-visualisation-of-the-internal-anatomy-of-the-sparrowhawk-accipiter-nisus-forelimb-using-contrast-enhanced-micro-computed-tomography
#3
Fernanda Bribiesca-Contreras, William I Sellers
BACKGROUND: Gross dissection is a widespread method for studying animal anatomy, despite being highly destructive and time-consuming. X-ray computed tomography (CT) has been shown to be a non-destructive alternative for studying anatomical structures. However, in the past it has been limited to only being able to visualise mineralised tissues. In recent years, morphologists have started to use traditional X-ray contrast agents to allow the visualisation of soft tissue elements in the CT context...
2017: PeerJ
https://www.readbyqxmd.com/read/28306694/real-world-use-of-ticagrelor-and-prasugrel-in-patients-with-nstemi-undergoing-percutaneous-coronary-intervention
#4
Vincenzo Sucato, Egle Corrado, Carmelo Castellana, Michele Carella, Simona Raso, Giuseppe Coppola, Giuseppe Andolina, Giuseppina Novo, Salvatore Evola, Salvatore Novo
OBJECTIVE: This retrospective observational study sought to describe the safety and efficacy profile of prasugrel and ticagrelor in patients with non-ST-segment elevation myocardial infarction (NSTEMI), who were admitted to the coronary intensive care unit (CICU) and underwent primary percutaneous coronary intervention (PCI). BACKGROUND AND METHODS: Dual antiplatelet therapy is mandatory for all the patients with acute coronary syndrome, who underwent PCI. Our study includes 111 patients with NSTEMI, who underwent PCI, in a maximum time of 72 h after their ischemic event...
March 16, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28306191/biomechanical-markers-and-theoretical-concepts-related-to-haemophilic-ankle-and-subtalar-joint-arthropathy-introducing-the-term-haemophilic-tarsal-pan-arthropathy
#5
REVIEW
S Lobet, A McCarthy, C Hermans, K Peerlinck, G A Matricali, F Staes, K Deschamps
BACKGROUND: Although regular factor replacement can reduce the incidence of joint bleeds and slow down the development of haemophilic arthropathy, the ankle joint remains particularly vulnerable even in children with haemophilia on primary or secondary prophylaxis and is now the primary joint affected. The heterogeneity in the pathoaetiology of haemophilic ankle arthropathy means that the functional consequences of early stage of ankle arthropathy are difficult to define as early morphological and structural changes can be observed in clinically asymptomatic ankles...
March 17, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28302642/pregnancy-and-the-risk-of-spontaneous-coronary-artery-dissection-an-analysis-of-120-contemporary-cases
#6
Ofer Havakuk, Sorel Goland, Anil Mehra, Uri Elkayam
BACKGROUND: Because of the rarity of this condition, information on pregnancy-associated spontaneous coronary artery dissection is limited. We reviewed a large number of contemporary pregnancy-associated spontaneous coronary artery dissection cases in an attempt to define the clinical characteristics and provide management recommendations. METHODS AND RESULTS: A literature search for cases of pregnancy-associated spontaneous coronary artery dissection reported between 2000 and 2015 included 120 cases; 75% presented with ST-segment-elevation myocardial infarction, and 80% had anterior myocardial infarction...
March 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28299676/bioresorbable-scaffolds-for-coronary-stenosis-when-and-how-based-upon-current-studies
#7
REVIEW
Alexandre Abizaid, J Ribamar Costa
PURPOSE OF REVIEW: First-generation bioresorbable scaffolds (BRS), largely represented by the poly-l-lactic acid (PLLA) ABSORB (Abbott Vascular, Temecula, Illinois, US), have demonstrated, in low to moderate lesion complexity, similar efficacy to current generation metallic drug-eluting stents. However, a trend toward more device thrombosis has been observed, especially when the scaffolds are used in off-label situations. In this review, we address the most relevant drawbacks of these devices and, based on the available scientific data, we visit the scenarios where there is more uncertainty about their indication, trying to identify the lesions/patients to whom this technology should be voided at its current stage of development...
March 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28295386/an-integrated-segmentation-and-shape-based-classification-scheme-for-distinguishing-adenocarcinomas-from-granulomas-on-lung-ct
#8
Mehdi Alilou, Niha Beig, Mahdi Orooji, Anant Madabhushi, Prabhakar Rajiah, Michael Yang, Robert Gilkeson, Philip Linden, Vamsidhar Velcheti, Sagar Rakshit, Niyoti Reddy, Frank Jacono
PURPOSE: Distinguishing between benign granulmoas and adenocarcinomas is confounded by their similar visual appearance on routine CT scans. Unfortunately, owing to the inability to discriminate these lesions radigraphically, many patients with benign granulomas are subjected to unnecessary surgical wedge resections and biopsies for pathologic confirmation of cancer presence or absence. This suggests the need for improved computerized characterization of these nodules in order to distinguish between these two classes of lesions on CT scans...
March 14, 2017: Medical Physics
https://www.readbyqxmd.com/read/28295313/peripheral-and-central-anatomical-organization-of-cutaneous-afferent-subtypes-in-a-rat-nociceptive-intersegmental-spinal-reflex
#9
Hyun Joon Lee, Jason M White, Jumi Chung, Keith E Tansey
Stimulation of rat segmental dorsal cutaneous nerves (DCNs) evokes the nociceptive intersegmental cutaneus trunci muscle (CTM) reflex. The reflex consists of early and late responses, mediated by Aδ and C fibers respectively based on required stimulation strengths, and shows segmental differences in terms of amplitude and duration. We have now investigated whether the peripheral or central anatomy of nociceptive afferent subtypes in different DCNs also vary in a segmental manner. The numbers of different axon subtypes, determined by axon diameter, were analyzed across peripheral DCNs from T6 to L1...
March 11, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28291210/-long-association-tracts-of-the-human-white-matter-an-analysis-of-18-hemisphere-dissections-and-in-vivo-hardi-csd-tractography
#10
S A Goryainov, A V Kondrashov, M F Gol'dberg, A I Batalov, R A Sufianov, N E Zakharova, I N Pronin, D A Gol'bin, V Yu Zhukov, G F Dobrovol'sky, S Yu Shelyakin, V N Vorob'ev, S S Dadykin, A A Potapov
BACKGROUND: Anatomy of the conduction tracts of the cerebral cortex has been studied for a long time. Invention of diffusion tensor tractography renewed interest in this subject. The objectives of this work were to develop and improve protocols for dissection of the long association tracts of the human brain with studying the features of their segmentation, topography, and variability, compare the obtained data with the MR tractography data, and prepare for further clinical and anatomical studies...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28288907/in-vivo-quantification-of-amygdala-subnuclei-using-4-7-t-fast-spin-echo-imaging
#11
Arash Aghamohammadi-Sereshki, Yushan Huang, Fraser Olsen, Nikolai V Malykhin
The amygdala (AG) is an almond-shaped heterogeneous structure located in the medial temporal lobe. The majority of previous structural Magnetic Resonance Imaging (MRI) volumetric methods for AG measurement have so far only been able to examine this region as a whole. In order to understand the role of the AG in different neuropsychiatric disorders, it is necessary to understand the functional role of its subnuclei. The main goal of the present study was to develop a reliable volumetric method to delineate major AG subnuclei groups using ultra-high resolution high field MRI...
March 10, 2017: NeuroImage
https://www.readbyqxmd.com/read/28287966/deep-learning-segmentation-of-optical-microscopy-images-improves-3d-neuron-reconstruction
#12
Rongjian Li, Tao Zeng, Hanchuan Peng, Shuiwang Ji
Digital reconstruction, or tracing, of 3-dimensional (3D) neuron structure from microscopy images is a critical step toward reversing engineering the wiring and anatomy of a brain. Despite a number of prior attempts, this task remains very challenging, especially when images are contaminated by noises or have discontinued segments of neurite patterns. An approach for addressing such problems is to identify the locations of neuronal voxels using image segmentation methods prior to applying tracing or reconstruction techniques...
March 8, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28281726/anastomotic-loop-between-common-hepatic-artery-and-gastroduodenal-artery-in-coexistence-with-an-aberrant-right-hepatic-artery
#13
Konstantinos Natsis, Maria Piagkou, Theodosis Stamatopoulos, Ioannis Spyridakis, Stylianos Apostolidis
Anatomical variations of the hepatic arteries are not uncommon. The anomalous hepatic arterial supply is of paramount importance in hepatobiliary, pancreatic or liver transplantation and in laparoscopic surgery. We describe an unusual case of a 66-year-old Greek male cadaver, where a rare anastomosis (in the form of an enlarged arterial loop, 4.84 mm in diameter) between the common hepatic artery (6.42 mm) and the gastroduodenal artery (GDA) (4.82 mm) coexisted with an aberrant right hepatic artery (ARHA) (6...
March 10, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28279769/lumbar-facet-tropism-a-comprehensive-review
#14
REVIEW
Fernando Alonso, Christina M Kirkpatrick, William Jeong, Christian Fisahn, Sameera Usman, Tarush Rustagi, Marios Loukas, Jens R Chapman, Rod J Oskouian, R Shane Tubbs
Scattered reports exist in the medical literature regarding facet tropism. However, this finding has had mixed conclusions regarding its origin and impact on the normal spine. Herein, we review the anatomy, embryology, biomechanics, and pathology related to lumbar facet tropism. Facet tropism is most commonly found at L4-L5 vertebral segments and there is some evidence that this condition may lead to facet degenerative spondylolisthesis, intervertebral disc disease, and other degenerative conditions.
March 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28276071/cfd-and-bernoulli-based-pressure-drop-estimates-a-comparison-using-patient-anatomies-from-heart-and-aortic-valve-segmentation-of-ct-images
#15
Jürgen Weese, Angela Lungu, Jochen Peters, Frank M Weber, Irina Waechter-Stehle, D Rodney Hose
PURPOSE: An aortic valve stenosis is an abnormal narrowing of the aortic valve (AV). It impedes blood flow and is often quantified by the geometric orifice area of the AV (AVA) and the pressure drop (PD). Using the Bernoulli equation, a relation between the PD and the effective orifice area (EOA) represented by the area of the vena contracta (VC) downstream of the AV can be derived. We investigate the relation between the AVA and the EOA using patient anatomies derived from cardiac computed tomography (CT) angiography images and computational fluid dynamic (CFD) simulations...
March 9, 2017: Medical Physics
https://www.readbyqxmd.com/read/28275581/clinical-anatomy-of-the-liver-review-of-the-19th-meeting-of-the-japanese-research-society-of-clinical-anatomy
#16
REVIEW
Yoshihiro Sakamoto, Norihiro Kokudo, Yoshikuni Kawaguchi, Keiichi Akita
Precise clinical knowledge of liver anatomy is required to safely perform a hepatectomy, for both open and laparoscopic surgery. At the 19th meeting of the Japanese Research Society of Clinical Anatomy (JRSCA), we conducted special symposia on essential issues of liver surgery, such as the history of hepatic segmentation, the glissonean pedicle approach, application of 3-D imaging simulation and fluorescent imaging using indocyanine green solution, a variety of segmentectomies including caudate lobectomy, the associating liver partition and portal vein embolization for stage hepatectomy and harvesting liver grafts for living donor liver transplantation...
February 2017: Liver Cancer
https://www.readbyqxmd.com/read/28274212/analysis-of-the-three-dimensional-anatomical-variance-of-the-distal-radius-using-3d-shape-models
#17
Sebastian F Baumbach, Jakob Binder, Alexander Synek, Fabian G Mück, Yan Chevalier, Ekkehard Euler, Georg Langs, Lukas Fischer
BACKGROUND: Various medical fields rely on detailed anatomical knowledge of the distal radius. Current studies are limited to two-dimensional analysis and biased by varying measurement locations. The aims were to 1) generate 3D shape models of the distal radius and investigate variations in the 3D shape, 2) generate and assess morphometrics in standardized cut planes, and 3) test the model's classification accuracy. METHODS: The local radiographic database was screened for CT-scans of intact radii...
March 9, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28269725/computational-models-of-non-invasive-brain-and-spinal-cord-stimulation
#18
Pedro C Miranda, Ricardo Salvador, Cornelia Wenger, Sofia R Fernandes
Non-invasive brain and spinal cord stimulation techniques are increasingly used for diagnostic and therapeutic purposes. Knowledge of the spatial distribution of the induced electric field is necessary to interpret experimental results and to optimize field delivery. Since the induced electric field cannot be measured in vivo in humans, computational models play a fundamental role in determining the characteristics of the electric field. We produced computational models of the head and trunk to calculate the electric field induced in the brain and spinal cord by transcranial magnetic stimulation, transcranial direct current stimulation and transcutaneous spinal cord direct current stimulation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269513/short-association-bundle-atlas-based-on-inter-subject-clustering-from-hardi-data
#19
C Roman, M Guevara, D Duclap, A Lebois, C Poupon, J-F Mangin, P Guevara
This paper is focused on the study of short brain association fibers. We present an automatic method to identify short bundles of the superficial white matter based on inter-subject hierarchical clustering. Our method finds clusters of similar fibers, belonging to the different subjects, according to a distance measure between fibers. First, the algorithm obtains representative bundles and subsequently we perform an automatic labeling based on the anatomy, of the most stable connections. The analysis was applied to two independent groups of 37 subjects...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267978/identification-of-essential-components-of-thoracoscopic-lobectomy-and-targets-for%C3%A2-simulation
#20
Mark K Ferguson, Cathy Bennett
BACKGROUND: Fewer than 50% of lobectomies for lung cancer are performed using thoracoscopic (video-assisted thoracic surgery [VATS]) techniques. This situation could be mitigated through the use of simulation training. Using a Delphi process, this study identified essential components of VATS right upper lobectomy most amenable to focused simulation. METHODS: Experienced VATS surgeons were randomly selected for participation. A custom Internet interface permitted anonymous voting, commenting, and the ability to modify and propose new components...
March 4, 2017: Annals of Thoracic Surgery
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