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Segmental anatomy

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https://www.readbyqxmd.com/read/29458187/mri-techniques-to-measure-arterial-and-venous-cerebral-blood-volume
#1
Jun Hua, Peiying Liu, Tae Kim, Manus Donahue, Swati Rane, J Jean Chen, Qin Qin, Seong-Gi Kim
The measurement of cerebral blood volume (CBV) has been the topic of numerous neuroimaging studies. To date, however, most in vivo imaging approaches can only measure CBV summed over all types of blood vessels, including arterial, capillary and venous vessels in the microvasculature (i.e. total CBV or CBVtot). As different types of blood vessels have intrinsically different anatomy, function and physiology, the ability to quantify CBV in different segments of the microvascular tree may furnish information that is not obtainable from CBVtot, and may provide a more sensitive and specific measure for the underlying physiology...
February 16, 2018: NeuroImage
https://www.readbyqxmd.com/read/29454128/preoperative-3-dimensional-angiography-data-and-intraoperative-real-time-vascular-data-integrated-in-microscope-based-navigation-by-automatic-patient-registration-applying-intraoperative-computed-tomography
#2
Barbara Carl, Miriam Bopp, Somar Chehab, Siegfried Bien, Christopher Nimsky
OBJECTIVE: To establish a workflow integrating preoperative 3-D angiography data, as well as intraoperative real-time vascular information in microscope-based navigation for aneurysm and arteriovenous malformation surgery. PATIENTS & METHODS: In 7 patients (3 arteriovenous malformations, 4 aneurysms) preoperative 3-D rotational angiography or computed tomography (CT) or magnetic resonance angiography data were navigated applying a 32-slice movable CT scanner for low-dose registration scanning...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29452689/measurements-of-lumen-areas-and-diameters-of-proximal-and-middle-coronary-artery-segments-in-subjects-without-coronary-atherosclerosis
#3
Jaroslaw Skowronski, Jerzy Pregowski, Gary S Mintz, Mariusz Kruk, Cezary Kepka, Pawel Tyczynski, Ilona Michalowska, Lukasz Kalinczuk, Maksymilian P Opolski, Michal Ciszewski, Rafal Wolny, Zbigniew Chmielak, Adam Witkowski
There are plenty of data on morphology and lumen dimensions of diseased coronary arteries. However, information on normal coronary vessel anatomy is scarce. We provided computed tomography angiography-derived reference values of lumen dimensions in proximal and middle coronary segments in a healthy population with respect to gender and vessel dominance. Consecutive 2,849 computed tomography angiography examinations were reviewed to identify 201 subjects (77 men, patient age 50 ± 13 years) whose coronary arteries were free from any sign of atherosclerosis (calcium score 0, no detectable plaque)...
February 2, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29450611/high-spatial-resolution-navigated-3d-t1-weighted-hepatobiliary-mr-cholangiography-using-gd-eob-dtpa-for-evaluation-of-biliary-anatomy-in-living-liver-donors
#4
Jei Hee Lee, Bohyun Kim, Hye Jin Kim, Bong-Wan Kim, Hee-Jung Wang, Jai Keun Kim
PURPOSE: To determine the feasibility of high-resolution navigated three-dimensional (3D) T1-weighted hepatobiliary MR cholangiography (Nav T1 MRC) using Gd-EOB-DTPA for biliary visualization in living liver donors and to assess added value of 3D T1-weighted hepatobiliary MRCs in improving the confidence and diagnostic accuracy of biliary anatomy in complementary to T2-weighted MRCs. METHODS: Twenty-nine right liver donors underwent 3D T2 MRC, 2D T2 MRC, breath-hold T1-weighted hepatobiliary MRC (BH T1 MRC), and Nav T1 MRC...
February 15, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29444206/grimmiaceae-in-the-early-cretaceous-tricarinella-crassiphylla-gen-et-sp-nov-and-the-value-of-anatomically-preserved-bryophytes
#5
Adolfina Savoretti, Alexander C Bippus, Ruth A Stockey, Gar W Rothwell, Alexandru M F Tomescu
Background and Aims: Widespread and diverse in modern ecosystems, mosses are rare in the fossil record, especially in pre-Cenozoic rocks. Furthermore, most pre-Cenozoic mosses are known from compression fossils, which lack detailed anatomical information. When preserved, anatomy significantly improves resolution in the systematic placement of fossils. Lower Cretaceous (Valanginian) deposits on Vancouver Island (British Columbia, Canada) contain a diverse anatomically preserved flora including numerous bryophytes, many of which have yet to be characterized...
February 10, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29437910/modern-diagnosis-of-gerd-the-lyon-consensus
#6
REVIEW
C Prakash Gyawali, Peter J Kahrilas, Edoardo Savarino, Frank Zerbib, Francois Mion, André J P M Smout, Michael Vaezi, Daniel Sifrim, Mark R Fox, Marcelo F Vela, Radu Tutuian, Jan Tack, Albert J Bredenoord, John Pandolfino, Sabine Roman
Clinical history, questionnaire data and response to antisecretory therapy are insufficient to make a conclusive diagnosis of GERD in isolation, but are of value in determining need for further investigation. Conclusive evidence for reflux on oesophageal testing include advanced grade erosive oesophagitis (LA grades C and D), long-segment Barrett's mucosa or peptic strictures on endoscopy or distal oesophageal acid exposure time (AET) >6% on ambulatory pH or pH-impedance monitoring. A normal endoscopy does not exclude GERD, but provides supportive evidence refuting GERD in conjunction with distal AET <4% and <40 reflux episodes on pH-impedance monitoring off proton pump inhibitors...
February 3, 2018: Gut
https://www.readbyqxmd.com/read/29437509/3d-printed-models-of-cleft-lip-and-palate-for-surgical-training-and-patient-education
#7
Pang-Yun Chou, Rami R Hallac, Ellen Shih, Jenny Trieu, Anjani Penumatcha, Priyanka Das, Clark A Meyer, James R Seaward, Alex A Kane
BACKGROUND: Sculpted physical models and castings of the anatomy of cleft lip and palate are used for parent, patient, and trainee education of cleft lip and palate conditions. In this study, we designed a suite of digital 3-dimensional (3D) models of cleft lip and palate anatomy with additive manufacturing techniques for patient education. METHODS: CT scans of subjects with isolated cleft palate, unilateral and bilateral cleft lip and palate, and a control were obtained...
March 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29435671/a-new-spect-ct-reconstruction-algorithm-reliability-and-accuracy-in-clinical-routine-for-non-oncologic-bone-diseases
#8
Olivier Delcroix, Philippe Robin, Maelenn Gouillou, Alexandra Le Duc-Pennec, Zarrin Alavi, Pierre-Yves Le Roux, Ronan Abgral, Pierre-Yves Salaun, David Bourhis, Solène Querellou
BACKGROUND: xSPECT Bone® (xB) is a new reconstruction algorithm developed by Siemens® in bone hybrid imaging (SPECT/CT). A CT-based tissue segmentation is incorporated into SPECT reconstruction to provide SPECT images with bone anatomy appearance. The objectives of this study were to assess xB/CT reconstruction diagnostic reliability and accuracy in comparison with Flash 3D® (F3D)/CT in clinical routine. Two hundred thirteen consecutive patients referred to the Brest Nuclear Medicine Department for non-oncological bone diseases were evaluated retrospectively...
February 12, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29432979/a-novel-multi-atlas-strategy-with-dense-deformation-field-reconstruction-for-abdominal-and-thoracic-multi-organ-segmentation-from-computed-tomography
#9
Bruno Oliveira, Sandro Queirós, Pedro Morais, Helena R Torres, João Gomes-Fonseca, Jaime C Fonseca, João L Vilaça
Anatomical evaluation of multiple abdominal and thoracic organs is generally performed with computed tomography images. Owing to the large field-of-view of these images, automatic segmentation strategies are typically required, facilitating the clinical evaluation. Multi-atlas segmentation (MAS) strategies have been widely used with this process, requiring multiple alignments between the target image and the set of known datasets, and subsequently fusing the alignment results to obtain the final segmentation...
February 2, 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29425527/approaches-to-pulmonary-atresia-with-major-aortopulmonary-collateral-arteries
#10
REVIEW
David J Barron, Phil Botha
Pulmonary atresia with major aortopulmonary collateral arteries (MAPCAs) is one of the most challenging surgical conditions to manage-not only because of the technical complexity of the surgery but also in terms of defining the anatomy of the pulmonary vasculature, the timing of surgery, and decision making on staged vs complete repair. The importance of early definition of pulmonary blood supply is paramount, establishing which areas of the lung are supplied by MAPCAs alone and which have dual supply with the native system (noting that 20% of patients have absent intrapericardial native vessels)...
March 2018: Seminars in Thoracic and Cardiovascular Surgery. Pediatric Cardiac Surgery Annual
https://www.readbyqxmd.com/read/29416855/recent-advances-in-understanding-vertebrate-segmentation
#11
REVIEW
Tomás Pais-de-Azevedo, Ramiro Magno, Isabel Duarte, Isabel Palmeirim
Segmentation is the partitioning of the body axis into a series of repeating units or segments. This widespread body plan is found in annelids, arthropods, and chordates, showing it to be a successful developmental strategy for growing and generating diverse morphology and anatomy. Segmentation has been extensively studied over the years. Forty years ago, Cooke and Zeeman published the Clock and Wavefront model, creating a theoretical framework of how developing cells could acquire and keep temporal and spatial information in order to generate a segmented pattern...
2018: F1000Research
https://www.readbyqxmd.com/read/29409173/characteristics-of-anterior-inferior-calcaneal-cortex
#12
T Harnroongroj, S Jiamamornrat, T Tharmviboonsri
BACKGROUND: Minimal invasive surgery of calcaneal fracture provided satisfactory outcomes. In tongue type calcaneal fracture, percutaneous screw usually purchases in anterior inferior calcaneal cortex. However, there was no detail about the cortex of anterior inferior calcaneus so the surface anatomy and cortical thickness of this area were studied. METHODS: 88 calcaneus from embalmed cadavers were enrolled. Anterior part of the inferior cortex was identified. Surface anatomy was examined...
December 24, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29407456/a-stereotaxic-breed-averaged-symmetric-t2w-canine-brain-atlas-including-detailed-morphological-and-volumetrical-data-sets
#13
Björn Nitzsche, Johannes Boltze, Eberhard Ludewig, Thomas Flegel, Martin J Schmidt, Johannes Seeger, Henryk Barthel, Olivia W Brooks, Matthew J Gounis, Michael H Stoffel, Sabine Schulze
Stereotaxic systems and automatic tissue segmentation routines enable neuronavigation as well as reproducible processing of neuroimage datasets. Such systems have been developed for humans, non-human-primates, sheep, and rodents, but not for dogs. Although dogs share important neurofunctional and -anatomical features with humans, and in spite of their importance in translational neuroscience, little is known about the variability of the canine brain morphology and, possibly related, function. Moreover, we lack templates, tissue probability maps (TPM), and stereotaxic brain labels for implementation in standard software utilities such as Statistical Parametric Mapping (SPM)...
January 30, 2018: NeuroImage
https://www.readbyqxmd.com/read/29404409/the-influence-of-dat1-comt-and-bdnf-genetic-polymorphisms-on-total-and-subregional-hippocampal-volumes-in-early-onset-heavy-cannabis-users
#14
Albert Batalla, Valentina Lorenzetti, Yann Chye, Murat Yücel, Carles Soriano-Mas, Sagnik Bhattacharyya, Marta Torrens, José A S Crippa, Rocío Martín-Santos
Introduction: Hippocampal neuroanatomy is affected by genetic variations in dopaminergic candidate genes and environmental insults, such as early onset of chronic cannabis exposure. Here, we examine how hippocampal total and subregional volumes are affected by cannabis use and functional polymorphisms of dopamine-relevant genes, including the catechol-O-methyltransferase (COMT), dopamine transporter (DAT1), and the brain-derived neurotrophic factor (BDNF) genes. Material and Methods: We manually traced total hippocampal volumes and automatically segmented hippocampal subregions using high-resolution MRI images, and performed COMT, DAT1, and BDNF genotyping in 59 male Caucasian young adults aged 18-30 years...
2018: Cannabis and Cannabinoid Research
https://www.readbyqxmd.com/read/29403349/group-analysis-in-mne-python-of-evoked-responses-from-a-tactile-stimulation-paradigm-a-pipeline-for-reproducibility-at-every-step-of-processing-going-from-individual-sensor-space-representations-to-an-across-group-source-space-representation
#15
Lau M Andersen
An important aim of an analysis pipeline for magnetoencephalographic data is that it allows for the researcher spending maximal effort on making the statistical comparisons that will answer the questions of the researcher, while in turn spending minimal effort on the intricacies and machinery of the pipeline. I here present a set of functions and scripts that allow for setting up a clear, reproducible structure for separating raw and processed data into folders and files such that minimal effort can be spend on: (1) double-checking that the right input goes into the right functions; (2) making sure that output and intermediate steps can be accessed meaningfully; (3) applying operations efficiently across groups of subjects; (4) re-processing data if changes to any intermediate step are desirable...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29401088/safe-zone-quantification-of-the-third-sacral-segment-in-normal-and-dysmorphic-sacra
#16
John S Hwang, Mark C Reilly, Mohammad K Shaath, Stuart Changoor, Jonathan Eastman, Milton Lee Chip Routt, Michael S Sirkin, Mark R Adams
OBJECTIVE: To quantify the osseous anatomy of the dysmorphic third sacral segment and assess its ability to accommodate internal fixation DESIGN:: Retrospective chart review of a trauma database SETTING:: University Level 1 Trauma Center PATIENTS:: Fifty-nine patients over the age of 18 with computed tomography (CT) scans of the pelvis separated into two groups: a group with normal pelvic anatomy and a group with sacral dysmorphism. MAIN OUTCOME MEASUREMENTS: The sacral osseous area was measured on CT scans in the axial, coronal, and sagittal planes in normal and dysmorphic pelves...
January 26, 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29395197/zone-zero-thoracic-endovascular-aortic-repair-a-proposed-modification-to-the-classification-of-landing-zones
#17
Eric E Roselli, Jay J Idrees, Douglas R Johnston, Matthew J Eagleton, Milind Y Desai, Lars G Svensson
OBJECTIVE: Endovascular stent-grafting provides an alternative treatment option for high-risk patients with ascending aortic disease. The feasibility of this approach has been demonstrated before. We assess the updated experience with ascending thoracic endovascular aortic repair and propose a modification of the landing zone classification based on the outcomes. METHODS: From 2006 to 2016, 39 patients deemed very high risk for open replacement underwent endovascular repair of ascending aorta for acute type A dissection (12, 31%), intramural hematoma (2, 5%), pseudoaneurysm (22, 56%), and chronic dissection suture line entry tear (3, 8%)...
November 22, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29392098/patient-specific-coronary-blood-supply-territories-for-quantitative-perfusion-analysis
#18
Constantine Zakkaroff, John D Biglands, John P Greenwood, Sven Plein, Roger D Boyle, Aleksandra Radjenovic, Derek R Magee
Myocardial perfusion imaging, coupled with quantitative perfusion analysis, provides an important diagnostic tool for the identification of ischaemic heart disease caused by coronary stenoses. The accurate mapping between coronary anatomy and under-perfused areas of the myocardium is important for diagnosis and treatment. However, in the absence of the actual coronary anatomy during the reporting of perfusion images, areas of ischaemia are allocated to a coronary territory based on a population-derived 17-segment (American Heart Association) AHA model of coronary blood supply...
2018: Computer Methods in Biomechanics and Biomedical Engineering. Imaging & Visualization
https://www.readbyqxmd.com/read/29384863/myocardial-perfusion-at-rest-in-uncomplicated-type-2-diabetes-patients-without-coronary-artery-disease-evaluated-by-320-multidetector-computed-tomography-a-pilot-study
#19
Xiangyi Cai, Shuihua Zhang, Dabiao Deng, Honglin Li, Xueqing Guan, Jin Fang, Quan Zhou
Using computed tomography myocardial perfusion imaging (CTP) to investigate resting myocardial perfusion alterations in uncomplicated type 2 diabetes mellitus (T2DM) patients without obstructive coronary artery disease (CAD).A total of 34 participants with 544 myocardial segments were included prospectively: 17 uncomplicated T2DM patients with no significant coronary artery stenosis on coronary computed tomography angiography and 17 healthy controls. Myocardial perfusion was evaluated by transmural perfusion ratio (TPR)...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29380518/ocular-anatomy-of-the-black-pacu-colossoma-macropomum-gross-histologic-and-diagnostic-imaging
#20
Kate A Gustavsen, Joanne R Paul-Murphy, Ernest Scott Weber, Allison L Zwingenberger, Freeland H Dunker, Richard R Dubielzig, Christopher M Reilly, Christopher J Murphy
OBJECTIVE: To describe the ocular anatomy of the black pacu (Colossoma macropomum), a freshwater teleost fish of the Amazon River basin, including an unusual choroid laden with adipose tissue. PROCEDURES: Three adult black pacu were anesthetized and examined clinically and with ocular ultrasonography, then euthanized. Three fish were euthanized and their heads imaged immediately postmortem using computed tomography. One fish was euthanized and its exenterated eyes imaged by high-resolution magnetic resonance imaging...
January 30, 2018: Veterinary Ophthalmology
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