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Segmental anatomy

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https://www.readbyqxmd.com/read/28822820/utility-of-3d-reconstruction-of-2d-liver-computed-tomography-magnetic-resonance-images-as-a-surgical-planning-tool-for-residents-in-liver-resection-surgery
#1
Caitlin T Yeo, Andrew MacDonald, Tamas Ungi, Andras Lasso, Diederick Jalink, Boris Zevin, Gabor Fichtinger, Sulaiman Nanji
OBJECTIVE: A fundamental aspect of surgical planning in liver resections is the identification of key vessel tributaries to preserve healthy liver tissue while fully resecting the tumor(s). Current surgical planning relies primarily on the surgeon's ability to mentally reconstruct 2D computed tomography/magnetic resonance (CT/MR) images into 3D and plan resection margins. This creates significant cognitive load, especially for trainees, as it relies on image interpretation, anatomical and surgical knowledge, experience, and spatial sense...
August 16, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28822527/coronary-artery-disease-in-women
#2
REVIEW
Lekha Adik Pathak, Salil Shirodkar, Ronak Ruparelia, Jaideep Rajebahadur
BACKGROUND: Despite the importance of CAD for women, there is persistent perception that CAD is a man's disease. Contributing to this notion is the observation of differences in incidence rates according to age; the incidence of CAD in women is lower than men, but rises steadily after fifth decade. The distribution of CAD risk factors varies between men and women across age ranges and failure to consider these differences may have contributed to the belief that women are at lower risk of CAD compared with men...
July 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28808803/a-prototype-educational-model-for-hepatobiliary-interventions-unveiling-the-role-of-graphic-designers-in-medical-3d-printing
#3
Ramin Javan, Merissa N Zeman
In the context of medical three-dimensional (3D) printing, in addition to 3D reconstruction from cross-sectional imaging, graphic design plays a role in developing and/or enhancing 3D-printed models. A custom prototype modular 3D model of the liver was graphically designed depicting segmental anatomy of the parenchyma containing color-coded hepatic vasculature and biliary tree. Subsequently, 3D printing was performed using transparent resin for the surface of the liver and polyamide material to develop hollow internal structures that allow for passage of catheters and wires...
August 14, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28808799/transorbital-endoscopic-approach-for-exposure-of-the-sylvian-fissure-middle-cerebral-artery-and-crural-cistern-an-anatomical-study
#4
João Paulo Almeida, Armando S Ruiz-Treviño, Sathwik R Shetty, Sacit B Omay, Vijay K Anand, Theodore H Schwartz
BACKGROUND: The availability of minimal access instrumentation and endoscopic visualization has revolutionized the field of minimally invasive skull base surgery. The transorbital endoscopic approach using an eyelid incision has been proposed as a new minimally invasive technique for the treatment of skull base pathology, mostly extradural tumors. Our study aims to evaluate the anatomical aspects and potential role of the transorbital endoscopic approach for exposure of the sylvian fissure, middle cerebral artery and crural cistern...
August 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28807205/facilitating-surgeon-understanding-of-complex-anatomy-using-a-three-dimensional-printed-model
#5
Barrett P Cromeens, William C Ray, Brad Hoehne, Fikir Abayneh, Brent Adler, Gail E Besner
BACKGROUND: 3-dimensional prints (3DP) anecdotally facilitate surgeon understanding of anatomy and decision-making. However, the actual benefit to surgeons or patients has not been quantified. This study investigates how surgeon understanding of complex anatomy is altered by a 3DP compared to computed tomography (CT) scan or CT + digital reconstruction (CT + DR). MATERIALS AND METHODS: Key anatomic features were segmented from a CT-abdomen/pelvis of pygopagus twins to build a DR and printed in color on a 3D printer...
August 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28806291/revisiting-the-abdominal-donor-site-introducing-a-novel-nomenclature-for-autologous-breast-reconstruction
#6
Jason M Weissler, Frank P Albino, Martin J Carney, Liza C Wu
As abdominally-based free flaps for breast reconstruction continue to evolve, significant effort has been invested in minimizing donor-site morbidity. The impact on the donor-site remains a prevailing principle for breast reconstruction, and thus must be adequately reflected when classifying what is left behind following flap harvest. Although successful in describing the type of flap harvested, the existing nomenclature falls short of incorporating certain critical variables, such as degree of muscular preservation, fascial involvement, mesh implantation, and segmental nerve anatomy...
August 3, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28801253/investigating-the-maturation-of-microstructure-and-radial-orientation-in-the-preterm-human-cortex-with-diffusion-mri
#7
Zach Eaton-Rosen, Benoit Scherrer, Andrew Melbourne, Sebastien Ourselin, Jeffrey J Neil, Simon K Warfield
Preterm birth disrupts and alters the complex developmental processes in the cerebral cortex. This disruption may be a contributing factor to widespread delay and cognitive difficulties in the preterm population. Diffusion-weighted magnetic resonance imaging (DW MRI) is a noninvasive imaging technique that makes inferences about cellular structures, at scales smaller than the imaging resolution. One established finding is that DW MRI shows a transient radial alignment in the preterm cortex. In this study, we quantify this maturational process with the "radiality index", a parameter that measures directional coherence, which we expect to change rapidly in the perinatal period...
August 8, 2017: NeuroImage
https://www.readbyqxmd.com/read/28798376/3d-biomimetic-artificial-bone-scaffolds-with-dual-cytokines-spatiotemporal-delivery-for-large-weight-bearing-bone-defect-repair
#8
Xiaogang Bao, Lingjun Zhu, Xiaodong Huang, Dezhi Tang, Dannong He, Jiangang Shi, Guohua Xu
It is a great challenge to prepare "functional artificial bone" for the repair of large segmental defect, especially in weight-bearing bones. In this study, bioactive HA/PCL composite scaffolds that possess anatomical structure as autogenous bone were fabricated by CT-guided fused deposition modeling technique. The scaffolds can provide mechanical support and possess osteoconduction property. Then the VEGF-165/BMP-2 loaded hydrogel was filled into biomimetic artificial bone spatially to introduce osteoinduction and angioinduction ability via sustained release of these cytokines...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28781835/aberrant-coronary-artery-spasms-cause-st-t-segment-depression-during-endovascular-ablation-of-atrial-flutter
#9
Eva A H Lanters, Adriaan Coenen, Marisa M Lubbers, Koen Nieman, Natasja M S de Groot
ST-T segment depression during right-sided endovascular catheter ablation is not only caused by obstructive coronary artery disease or (induced) tachycardia. Clinicians should also consider coronary artery spasms evoked by manipulation of nearby catheters, especially in patients with abnormal coronary artery anatomy.
August 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28776594/the-inner-retinal-structures-of-the-eyes-of-children-with-a-history-of-retinopathy-of-prematurity
#10
Y-S Lee, S H L Chang, S-C Wu, L-C See, S-H Chang, M-L Yang, W-C Wu
PurposeTo investigate the microstructural differences of the inner retina in the peripapillary and macular areas in children with or without retinopathy of prematurity (ROP).MethodsThis prospective cohort study included school-age children with a history of ROP and age-matched healthy, full-term children. The macular ganglion cell complex (mGCC), peripapillary retinal nerve fiber layer (RNFL), refractive status, and ocular biometry were measured. The metrics of the mGCC and associated anatomical changes were the primary outcomes...
August 4, 2017: Eye
https://www.readbyqxmd.com/read/28769784/cortical-surface-thickness-in-the-middle-aged-brain-with-white-matter-hyperintense-lesions
#11
Ying Zhuang, Xianjun Zeng, Bo Wang, Muhua Huang, Honghan Gong, Fuqing Zhou
Background and purpose: Previous voxel-based morphometry (VBM) studies have suggested that cortical atrophy is regionally distributed in middle-aged subjects with white matter hyperintense (WMH) lesions. However, few studies have assessed cortical thickness in middle-aged WMH subjects. In this study, we examined cortical thickness as well as cortical morphometry associated with the presence of WMH lesion load in middle-aged subjects. Participants and methods: Thirty-six middle-aged subjects with WMH lesions (WMH group) and without clinical cognitive impairment, and 34 demographically matched healthy control subjects (HCS group) participated in the study...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28765690/diarrhea-after-bariatric-procedures-diagnosis-and-therapy
#12
REVIEW
Yves M Borbély, Alice Osterwalder, Dino Kröll, Philipp C Nett, Roman A Inglin
Diarrhea after bariatric procedures, mainly those with malabsorptive elements including Roux-Y Gastric Bypass and Biliopancreatic Diversion, is common and an essential determinant of quality of life and micro- and macronutrient deficiencies. Bariatric surgery is the only sustainably successful method to address morbid obesity and its comorbidities, particularly gaining more and more importance in the specific treatment of diabetic patients. Approximately half a million procedures are annually performed around the world, with numbers expected to rise drastically in the near future...
July 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28764141/morphological-study-of-human-liver-and-its-surgical-importance
#13
Heena J Chaudhari, Minal K Ravat, Vasant H Vaniya, Amul N Bhedi
INTRODUCTION: Liver is the largest abdominal organ located in right hypochondrium, epigastrium and left hypochondrium in upper abdominal cavity. Although the segmental anatomy of the liver has been extensively researched, very few studies have dealt with surface variations of the liver. The major fissures are important landmarks for interpreting the lobar anatomy and locating the liver lesions. AIM: To determine gross anatomical variations of liver and their clinical and surgical implications...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28764139/atlantooccipital-fusion-prevalence-and-its-developmental-and-clinical-correlation
#14
D K Sharma, Deepak Sharma, Vandana Sharma
INTRODUCTION: Atlantooccipital fusion or occipitalization of atlas or assimilation of atlas is a rare or uncommon abnormality recorded in anatomical, morphological and radiological studies. It is usually associated with reduction in dimensions of foramen magnum leading to acute or chronic neurovascular compression and clinical manifestations of varying severity. Though, atlantooccipital fusion is rare but it is important and significant for the physicians and surgeons for their diagnostic and therapeutic approach...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28756622/fully-automatic-multi-organ-segmentation-in-normal-whole-body-magnetic-resonance-imaging-mri-using-classification-forests-cfs-convolutional-neural-networks-cnns-and-a-multi-atlas-ma-approach
#15
Ioannis Lavdas, Ben Glocker, Konstantinos Kamnitsas, Daniel Rueckert, Henrietta Mair, Amandeep Sandhu, Stuart A Taylor, Eric O Aboagye, Andrea G Rockall
PURPOSE: As part of a programme to implement automatic lesion detection methods for whole body magnetic resonance imaging (MRI) in oncology, we have developed, evaluated and compared three algorithms for fully automatic, multi-organ segmentation in healthy volunteers. METHODS: The first algorithm is based on classification forests (CFs), the second is based on 3D convolutional neural networks (CNNs) and the third algorithm is based on a multi-atlas (MA) approach...
July 30, 2017: Medical Physics
https://www.readbyqxmd.com/read/28755923/proximal-sacral-deformity-a-common-element-in-lytic-isthmic-spondylolisthesis-at-l5-and-in-degenerative-spondylolisthesis-at-l4-l5-segment-two-apparently-very-different-etiopathogenic-entities
#16
A Gallego-Goyanes, D Barahona-Lorenzo, M A Díez-Ulloa
A radiographic study was carried out to investigate the relationship between proximal sacral sagittal anatomy (either kyphosis or lordosis) and either isthmic or degenerative spondylolisthesis. In addition, we studied whether there is a relationship between proximal sacral kyphosis and the degree of such listhesis in the case of L5 isthmic spondylolisthesis. Lateral standing x-rays were used from 173 patients, ninety of whom had degenerative spondylolisthesis L4-L5, and eighty-three an isthmic spondylolisthesis of L5 (67 low-grade and 16 high-grade) and compared with a control group of 100 patients adjusted by age and gender, without any type of spondylolisthesis...
July 26, 2017: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/28755161/usefulness-of-three-dimensional-image-navigation-system-for-evaluation-of-hepatic-artery-before-living-donor-liver-transplantation-a-case-report
#17
Michinori Matsumoto, Shigeki Wakiyama, Hiroaki Shiba, Yuichi Ishida, Yoshiaki Kita, Katsuhiko Yanaga
BACKGROUND: The evaluation of the hepatic vascular anatomy in living liver donors is increasingly being performed by three-dimensional (3D) computed tomography (CT) angiography. However, details of hepatic artery anatomy obtained by 3D CT angiography are not always superior to those obtained by angiography. Here, we report a case in which the 3D image navigation system helped to detect segment II, III, and IV arteries (A2, A3, and A4, respectively) that individually originated from the proper hepatic artery (PHA); this could not be detected by 3D CT angiography...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28755036/a-pilot-study-for-segmentation-of-pharyngeal-and-sino-nasal-airway-subregions-by-automatic-contour-initialization
#18
Bala Chakravarthy Neelapu, Om Prakash Kharbanda, Viren Sardana, Abhishek Gupta, Srikanth Vasamsetti, Rajiv Balachandran, Shailendra Singh Rana, Harish Kumar Sardana
PURPOSE: The objective of the present study is to put forward a novel automatic segmentation algorithm to segment pharyngeal and sino-nasal airway subregions on 3D CBCT imaging datasets. METHODS: A fully automatic segmentation of sino-nasal and pharyngeal airway subregions was implemented in MATLAB programing environment. The novelty of the algorithm is automatic initialization of contours in upper airway subregions. The algorithm is based on boundary definitions of the human anatomy along with shape constraints with an automatic initialization of contours to develop a complete algorithm which has a potential to enhance utility at clinical level...
July 28, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28753247/take-away-body-parts-an-investigation-into-the-use-of-3d-printed-anatomical-models-in-undergraduate-anatomy-education
#19
Claire F Smith, Nicholas Tollemache, Derek Covill, Malcolm Johnston
Understanding the three-dimensional (3D) nature of the human form is imperative for effective medical practice and the emergence of 3D printing creates numerous opportunities to enhance aspects of medical and healthcare training. A recently deceased, un-embalmed donor was scanned through high-resolution computed tomography. The scan data underwent segmentation and post-processing and a range of 3D-printed anatomical models were produced. A four-stage mixed-methods study was conducted to evaluate the educational value of the models in a medical program...
July 28, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28742016/intraoperative-ultrasonography-of-the-biliary-tract-using-saline-as-a-contrast-agent-a-fast-and-accurate-technique-to-identify-complex-biliary-anatomy
#20
Abhijit Chandra, Vivek Gupta, Rahul Rahul, Manoj Kumar, Ajeet Maurya
BACKGROUND: Intraoperative assessment of biliary tract anatomy is relevant for a number of benign and malignant hepatobiliary diseases. During biliary reconstruction, drainage of all relevant bile ducts is imperative to prevent atrophy of undrained segment, cholangitis and secondary biliary cirrhosis. Intraoperative cholangiography, though widely used for intraoperative imaging of the biliary tract, involves heavy equipment use, radiation risk and has a limited role in the evaluation of isolated segmental bile ducts...
August 1, 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
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