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Segmental anatomy

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https://www.readbyqxmd.com/read/29665044/comparative-anatomy-and-development-of-pectoral-and-pelvic-girdles-in-hylid-anurans
#1
Mónica C Soliz, María Laura Ponssa, Virginia Abdala
The development of the tetrapod pectoral and pelvic girdles is intimately linked to the proximal segments of the fore- and hindlimbs. Most studies on girdles are osteological and provide little information about soft elements such as muscles and tendons. Moreover, there are few comparative developmental studies. Comparative data gleaned from cleared-and-stained whole mounts and serial histological sections of 10 species of hylid frogs are presented here. Adult skeletal morphology, along with bones, muscles, and connective tissue of both girdles and their association with the proximal portions of the anuran fore- and hindlimbs are described...
April 17, 2018: Journal of Morphology
https://www.readbyqxmd.com/read/29664855/restoration-of-the-patient-specific-anatomy-of-the-proximal-and-distal-parts-of-the-humerus-statistical-shape-modeling-versus-contralateral-registration-method
#2
Lazaros Vlachopoulos, Marcel Lüthi, Fabio Carrillo, Christian Gerber, Gábor Székely, Philipp Fürnstahl
BACKGROUND: In computer-assisted reconstructive surgeries, the contralateral anatomy is established as the best available reconstruction template. However, existing intra-individual bilateral differences or a pathological, contralateral humerus may limit the applicability of the method. The aim of the study was to evaluate whether a statistical shape model (SSM) has the potential to predict accurately the pretraumatic anatomy of the humerus from the posttraumatic condition. METHODS: Three-dimensional (3D) triangular surface models were extracted from the computed tomographic data of 100 paired cadaveric humeri without a pathological condition...
April 18, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29663370/deformable-torso-phantoms-of-chinese-adults-for-personalized-anatomy-modelling
#3
Hongkai Wang, Xiaobang Sun, Tongning Wu, Congsheng Li, Zhonghua Chen, Meiying Liao, Mengci Li, Wen Yan, Hui Huang, Jia Yang, Ziyu Tan, Libo Hui, Yue Liu, Hang Pan, Yue Qu, Zhaofeng Chen, Liwen Tan, Lijuan Yu, Hongcheng Shi, Li Huo, Yanjun Zhang, Xin Tang, Shaoxiang Zhang, Changjian Liu
In recent years, there has been increasing demand for personalized anatomy modelling for medical and industrial applications, such as ergonomics device development, clinical radiological exposure simulation, biomechanics analysis, and 3D animation character design. In this study, we constructed deformable torso phantoms that can be deformed to match the personal anatomy of Chinese male and female adults. The phantoms were created based on a training set of 79 trunk computed tomography (CT) images (41 males and 38 females) from normal Chinese subjects...
April 16, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29660812/tremor-severity-in-parkinson-s-disease-and-cortical-changes-of-areas-controlling-movement-sequencing-a-preliminary-study
#4
Julián Benito-León, J Ignacio Serrano, Elan D Louis, Ales Holobar, Juan P Romero, P Povalej-Bržan, Félix Bermejo-Pareja, M Dolores Del Castillo, Ignacio J Posada, Eduardo Rocon
There remains much to learn about the changes in cortical anatomy that are associated with tremor severity in Parkinson's disease (PD). For this reason, we used a combination of structural neuroimaging to measure cortical thickness and neurophysiological studies to analyze whether PD tremor was associated with cortex integrity. Magnetic resonance imaging and neurophysiological assessment were performed in 13 nondemented PD patients (9 women, 69.2%) with a clearly tremor-dominant phenotype. Cortical reconstruction and volumetric segmentation were performed with the Freesurfer image analysis software...
April 16, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29660062/minimally-invasive-exposure-of-the-maxillary-artery-at-the-anteromedial-infratemporal-fossa
#5
Roberto Rodriguez Rubio, Olivia Kola, Ali Tayebi Meybodi, Halima Tabani, Xuequan Feng, Jan-Karl Burkhardt, Sonia Yousef, Michael T Lawton, Arnau Benet
BACKGROUND: The maxillary artery (MA) has been described as a reliable donor for extracranial-intracranial high-flow bypass. Existing techniques to harvest MA require brain retraction and drilling of the middle fossa (with or without a zygomatic osteotomy), carrying the potential risks of venous bleeding, injury to the branches of the maxillary or mandibular nerves, muscular transection, or temporomandibular junction disorders. OBJECTIVE: To describe a novel technique to expose the MA without bony drilling and with minimal impact to surrounding structures...
April 12, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29652231/endoscopic-endonasal-transoculomotor-triangle-approach-for-adenomas-invading-the-parapeduncular-space-surgical-anatomy-technical-nuances-and-case-series
#6
Cristian Ferrareze Nunes, Stefan Lieber, Huy Q Truong, Georgios Zenonos, Eric W Wang, Carl H Snyderman, Paul A Gardner, Juan C Fernandez-Miranda
OBJECTIVE Pituitary adenomas may extend into the parapeduncular space by invading through the roof of the cavernous sinus. Currently, a transcranial approach is the preferred choice, with or without the combination of an endonasal approach. In this paper the authors present a novel surgical approach that takes advantage of the natural corridor provided by the tumor to further open the oculomotor triangle and resect tumor extension into the parapeduncular space. METHODS Six injected specimens were used to demonstrate in detail the surgical anatomy related to the approach...
April 13, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29652167/computational-phantoms-icrp-icru-and-further-developments
#7
M Zankl, J Becker, C Lee, W E Bolch, Y S Yeom, C H Kim
Phantoms simulating the human body play a central role in radiation dosimetry. The first computational body phantoms were based upon mathematical expressions describing idealised body organs. With the advent of more powerful computers in the 1980s, voxel phantoms have been developed. Being based on three-dimensional images of individuals, they offer a more realistic anatomy. Hence, the International Commission on Radiological Protection (ICRP) decided to construct voxel phantoms representative of the adult Reference Male and Reference Female for the update of organ dose coefficients...
January 1, 2018: Annals of the ICRP
https://www.readbyqxmd.com/read/29627044/fundamental-and-practical-aspects-of-airway-anatomy-from-glottis-to-segmental-bronchus
#8
REVIEW
Reza J Mehran
The surgical anatomy of the airways from the glottis to segmental bronchi is reviewed with a focused review on pertinent anatomic findings surrounding common surgical procedures. The knowledge of the anatomy of the trachea while performing tracheostomy, tracheal and sleeve carinal resection, and bronchoplastic procedures is addressed. Pertinent anatomic relationships as evident on common computed tomographic imagery are emphasized.
May 2018: Thoracic Surgery Clinics
https://www.readbyqxmd.com/read/29624551/three-dimensional-modeling-for-crohn-s-fistula-in-ano-a-novel-interactive-approach
#9
David Lam, Eric Yong, Basil D'Souza, Rodney Woods
BACKGROUND: Pelvic MRI allows for clear delineation of anatomy in Crohn's fistula-in-ano, although its interpretation is often difficult for nonradiologists. OBJECTIVE: The aim was to develop a 3-dimensional model where fistula tracts and their relationship to the sphincter complex can be accurately defined, which can then be rotated in multiple axes by the surgeon. DESIGN: A 3-dimensional model was created based on MRI images. An additional 3-dimensional T2-weighted sequence was added to the existing MRI protocol to obtain high-resolution images...
May 2018: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/29622979/anomalous-origin-of-left-main-coronary-artery-from-the-right-sinus-of-valsalva-presenting-as-non-st-elevation-acute-coronary-syndrome-a-case-report
#10
Anish Hirachan, Arun Maskey, Gopi Prasad Hirachan, Madhu Roka
Congenital anomalies of the coronary arteries are a cause of sudden cardiac death. Of the known anatomic variants, anomalous origination of a coronary artery from an opposite sinus of Valsalva (ACAOS) remains a major clinical issue and a challenging condition to treat. Congenital coronary anomalies are likely to be under-recognized, as completing an anatomic assessment in a very large portion of the population would seem unfeasible. However, we present a case report with image of a 49 year old male presented with acute non-ST elevation ACS for which he underwent diagnostic angiography of the coronary system which revealed a common origin of both right and left main coronary artery from right sinus of Valsalva with significant obstructive lesion in the mid segment of right coronary artery...
September 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
https://www.readbyqxmd.com/read/29621973/comparison-of-ventral-organ-development-across-pycnogonida-arthropoda-chelicerata-provides-evidence-for-a-plesiomorphic-mode-of-late-neurogenesis-in-sea-spiders-and-myriapods
#11
Georg Brenneis, Gerhard Scholtz, Barbara S Beltz
BACKGROUND: Comparative studies of neuroanatomy and neurodevelopment provide valuable information for phylogenetic inference. Beyond that, they reveal transformations of neuroanatomical structures during animal evolution and modifications in the developmental processes that have shaped these structures. In the extremely diverse Arthropoda, such comparative studies contribute with ever-increasing structural resolution and taxon coverage to our understanding of nervous system evolution...
April 5, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29621960/experimental-uterus-transplant-in-various-models-review-of-surgical-techniques
#12
Jalal Arvin, Maryam Ashrafi, Saeedeh Lotfi, Arash Dadvand Meshgin Shahr, Elvira Schomann, Kristina Scheerer, Elke Schulmeyer
Uterus transplantation may become the surgical therapeutic modality of choice for uterine factor infertility. However, this procedure still faces technical, therapeutic, and immunologic challenges that limit its success and clinical application. Experimental studies are therefore still needed to address various challenges in the field of uterus transplantation. Among various laboratory animals, small animals are ideal models for the purpose of experimental uterus transplant. However, clinical success in small animal models is not generalizable to clinical application and treatment for uterine factor infertility in humans...
April 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29616497/malformed-vertebrae-a-clinical-and-imaging-review
#13
REVIEW
Apeksha Chaturvedi, Nina B Klionsky, Umakanthan Nadarajah, Abhishek Chaturvedi, Steven P Meyers
A variety of structural developmental anomalies affect the vertebral column. Malformed vertebrae can arise secondary to errors of vertebral formation, fusion and/or segmentation and developmental variation. Malformations can be simple with little or no clinical consequence, or complex with serious structural and neurologic implications. These anomalies can occasionally mimic acute trauma (bipartite atlas versus Jefferson fracture, butterfly vertebra versus burst fracture), or predispose the affected individual to myelopathy...
April 3, 2018: Insights Into Imaging
https://www.readbyqxmd.com/read/29614354/bony-dehiscence-of-the-horizontal-petrous-ica-canal-an-anatomic-study-with-surgical-implications
#14
Alexander Spiessberger, Fabian Baumann, Karl Friedrich Kothbauer, Mohammed Aref, Serge Marbacher, Javier Fandino, Edin Nevzati
OBJECTIVE: The cervical carotid segment is routinely used as donor site for high flow bypass procedures. The horizontal petrous segment would offer a shorter graft distance, complete graft protection intracranially and avoid the need for surgical neck exposure. In a morphometric cadaveric study we aim to investigate variations of the petrous carotid anatomy, especially the incidence of bony dehiscence of the roof of the horizontal petrous carotid segment canal, which may facilitate exposure of the vessel and thereby potentially lower the morbidity of high flow bypass procedures...
March 31, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29611724/velocity-vector-imaging-for-the-assessment-of-segmental-ventricular-function-in-children-with-a-single-right-ventricle-after-cavopulmonary-anastomosis
#15
Li-Jun Chen, Yu-Qi Zhang, Sheng-Fang Bao, Shu-Wen Zhong, Ai-Min Sun, Zhi-Fang Zhang
OBJECTIVE: Ventricular function assessment is very important for the treatment and prognostic classification of children with a single right ventricle (SRV) after cavopulmonary anastomosis (CPA). However, unusual ventricular shapes can result in inaccurate measurements. The aim of this study was to evaluate velocity vector imaging (VVI) for assessing segmental ventricular function in children with SRV after CPA. METHODS: Twenty-one children with SRV after CPA and 21 age- and sex-matched children with normal biventricular anatomy and function were included...
April 3, 2018: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29609953/determination-of-prostate-volume-a-comparison-of-contemporary-methods
#16
Adam Bezinque, Andrew Moriarity, Crystal Farrell, Henry Peabody, Sabrina L Noyes, Brian R Lane
RATIONALE AND OBJECTIVES: Prostate volume (PV) determination provides important clinical information. We compared PVs determined by digital rectal examination (DRE), transrectal ultrasound (TRUS), magnetic resonance imaging (MRI) with or without three-dimensional (3D) segmentation software, and surgical prostatectomy weight (SPW) and volume (SPV). MATERIALS AND METHODS: This retrospective review from 2010 to 2016 included patients who underwent radical prostatectomy ≤1 year after multiparametric prostate MRI...
March 30, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29607159/application-of-3d-printing-in-the-surgical-planning-of-hypertrophic-obstructive-cardiomyopathy-and-physician-patient-communication-a-preliminary-study
#17
Hong-Chang Guo, Yang Wang, Jiang Dai, Chang-Wei Ren, Jin-Hua Li, Yong-Qiang Lai
Background: The aim of this study was to evaluate the effect of 3-dimensional (3D) printing in treatment of hypertrophic obstructive cardiomyopathy (HOCM) and its roles in doctor-patient communication. Methods: 3D-printed models were constructed preoperatively and postoperatively in seven HOCM patients received surgical treatment. Based on multi-slice computed tomography (CT) images, regions of disorder were segmented using the Mimics 19.0 software (Materialise, Leuven, Belgium)...
February 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29600345/tips-and-tricks-for-a-laparoscopic-approach-to-paracaval-liver-segments
#18
G Fiorentini, F Ratti, F Cipriani, M Catena, M Paganelli, L Aldrighetti
BACKGROUND: A dramatic spread of laparoscopic liver surgery has been experienced over the last years. The approach to paracaval liver segments 1 and 9 is still poorly described in literature, mainly due to its technical demands. OBJECTIVE: The aim of this article was to introduce a safe and effective approach to paracaval liver segments through laparoscopy. METHODS: A minimally invasive approach to resection of Segments 1 and 9 is presented, and an operative set-up is depicted...
March 29, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29595145/feasibility-of-online-impt-adaptation-using-fast-automatic-and-robust-dose-restoration
#19
Kinga Bernatowicz, Xavier Geets, Ana Barragan, Guillaume Janssens, Kevin Souris, Edmond Sterpin
Intensity-modulated proton therapy (IMPT) offers excellent dose conformity and healthy tissue sparing, but it can be substantially compromised in the presence of anatomical changes. A major dosimetric effect is caused by density changes, which alter the planned proton range in the patient. Three different methods, which automatically restore an IMPT plan dose on a daily CT image were implemented and compared: (1) simple dose restoration (DR) using optimization objectives of the initial plan, (2) voxel-wise dose restoration (vDR), and (3) isodose volume dose restoration (iDR)...
March 29, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29594536/use-of-black-bone-mri-in-the-diagnosis-of-the-patients-with-posterior-plagiocephaly
#20
Linda Kuusela, Ada Hukki, Nina Brandstack, Taina Autti, Junnu Leikola, Anne Saarikko
PURPOSE: Ionising radiation exposure is especially harmful to brain development. The purpose of this study was to evaluate whether black-bone (BB) magnetic resonance imaging (MRI), a non-ionising imaging method, offers an alternative to ionising imaging methods such as computed tomography (CT) in the examination of cranial deformities. METHODS: From 2012 to 2014, a total of 408 children were referred to the Craniofacial Centre at the Helsinki University Hospital for further examination due to flatness of the posterior skull...
March 29, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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