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https://www.readbyqxmd.com/read/28549293/automated-recognition-of-the-pericardium-contour-on-processed-ct-images-using-genetic-algorithms
#1
É O Rodrigues, L O Rodrigues, L S N Oliveira, A Conci, P Liatsis
This work proposes the use of Genetic Algorithms (GA) in tracing and recognizing the pericardium contour of the human heart using Computed Tomography (CT) images. We assume that each slice of the pericardium can be modelled by an ellipse, the parameters of which need to be optimally determined. An optimal ellipse would be one that closely follows the pericardium contour and, consequently, separates appropriately the epicardial and mediastinal fats of the human heart. Tracing and automatically identifying the pericardium contour aids in medical diagnosis...
May 17, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28549261/small-spontaneously-ruptured-gastrointestinal-stromal-tumor-in-the-small-intestine-causing-hemoperitoneum-a-case-report
#2
Shuichi Fukuda, Yoshinori Fujiwara, Tomoko Wakasa, Keisuke Inoue, Kotaro Kitani, Hajime Ishikawa, Masanori Tsujie, Masao Yukawa, Yoshio Ohta, Masatoshi Inoue
INTRODUCTION: Gastrointestinal stromal tumors (GISTs) are clinically asymptomatic until they reach a significant size; therefore, GISTs that are 2cm or less are typically asymptomatic. Patients with symptomatic GISTs typically present with abdominal pain, gastrointestinal bleeding, or a palpable mass but rarely present with hemoperitoneum. PRESENTATION OF CASE: A 72-year-old Japanese man presented to us with acute onset abdominal pain. Physical examination showed peritoneal irritation in the lower abdomen...
May 17, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28549110/thoracic-aortitis-and-aortic-dissection-following-pegfilgrastim-administration
#3
Yuki Sato, Shuichiro Kaji, Hiroyuki Ueda, Keisuke Tomii
The patient was a 67-year-old woman with a history of advanced lung adenocarcinoma. Eight days after pegfilgrastim administration, her computed tomography scan revealed thickened bilateral common carotid arteries and thoracic aorta, which led to the diagnosis of pegfilgrastim-associated aortitis. Thirty-six days after pegfilgrastim administration, asymptomatic Stanford type B aortic dissection was detected. Her serum biomarker analysis suggested that interleukin-6 might be involved in the pathogenesis. Physicians should be aware of these adverse effects of filgrastim...
May 26, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28549022/pictorial-review-of-surgical-anatomy-in-adult-congenital-heart-disease
#4
Carlo N De Cecco, Giuseppe Muscogiuri, José M Madrid Pérez, Marwen Eid, Pal Suranyi, Virginia W Lesslie, Gorka Bastarrika
The survival rate of patients with congenital heart disease (CHD) has dramatically improved over the last 2 decades because of technological and surgical advances in diagnosis and treatment, respectively. The vast majority of CHD patients are, in fact, amenable to treatment by either device closure or surgery. Considering the wide spectrum of surgical procedures and complex native and derived anatomy, continuous and detailed follow-up is of paramount importance. Cardiac magnetic resonance and cardiac computed tomography angiography are the cornerstones of diagnosis and follow-up of CHD, allowing for comprehensive noninvasive assessment of the heart, coronary tree, and intrathoracic great vessels, along with both morphological and functional evaluation...
May 25, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28549021/crus-atrophy-accuracy-of-computed-tomorgraphy-in-diagnosis-of-diaphragmatic-paralysis
#5
Warawut Sukkasem, Sherine G Moftah, Gregory Kicska, J David Godwin, Sudhakar Pipavath, Eric Stern
PURPOSE: The aim of this study was to measure the association between crus atrophy as depicted by computed tomography (CT) and fluoroscopic diagnosis of hemidiaphragmatic paralysis in patients with suspected diaphragmatic dysfunction. MATERIALS AND METHODS: A retrospective review of patient data was approved by our institutional review board and was HIPPA-compliant. We reviewed 90 patients who had undergone diaphragmatic fluoroscopy; 72 had CT scans available for measurement of crus thickness at the levels of the celiac and superior mesenteric arteries and the L1 vertebral body...
May 25, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28549020/lung-density-and-pulmonary-artery-diameter-are-predictors-of-pulmonary-hypertension-in-systemic-sclerosis
#6
Margreet E Bakker, Maarten K Ninaber, Jan Stolk, Lucia J M Kroft, Anne A Schouffoer, Jeska K de Vries Bouwstra, Suzanne E van Wijngaarden, Berend C Stoel
PURPOSE: The aim was to evaluate computed tomography (CT)-measured pulmonary artery diameter (PAD) and lung density as predictors of pulmonary hypertension (PH) in subjects with systemic sclerosis (SSc). We compared these PAD values with normal values and between SSc subgroups with PH and/or interstitial lung disease (ILD). We investigated whether PAD predicts PH and whether lung densitometry, by using the 85th percentile density value (Perc85) as a measure for ILD, can predict PH. MATERIALS AND METHODS: PAD and Perc85 were measured in axial CT scans and compared between 54 SSc and 76 control subjects...
May 25, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28548993/muscle-metabolism
#7
Nicolas Tardif, Jonathan Grip, Olav Rooyackers
PURPOSE OF REVIEW: To review the recent findings on metabolic derangements leading to loss of muscle mass and function. RECENT FINDINGS: Several recent studies investigated methods to assess muscle mass and function and its clinical relevance. These are also included. A few studies confirm that a low muscle mass is related to a worse outcome but also a compromised muscle function at discharge is related to long-term survival. A low quality of muscle assessed by the density of muscle from a computed tomography scan is related to mortality...
May 25, 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28548975/factor-vii-activating-protease-sex-related-association-with-coronary-artery-calcification
#8
Ramshanker Ramanathan, Jørgen B Gram, Niels Peter R Sand, Bjarne L Nørgaard, Axel C P Diederichsen, Frank Vitzthum, Herbert Schwarz, Johannes J Sidelmann
: Factor VII-activating protease (FSAP) may regulate development of cardiovascular disease (CVD). We evaluated sex differences in FSAP measures and examined the association between FSAP and coronary artery calcification (CAC) in a middle-aged population. Participants were randomly selected citizens aged 50 or 60 without CVD, diabetes mellitus, Marburg I polymorphism, or hormone replacement therapy (HRT). FSAP protein concentration (total FSAP), FSAP urokinase-activating capacity (FSAP GP), and FSAP GP/total FSAP (specific FSAP activity) were measured...
May 25, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28548887/effects-of-bone-morphogenetic-protein-2-on-vertical-bone-augmentation-in-a-canine-model
#9
Yung-Ting Hsu, Khalid Al-Hezaimi, Pablo Galindo-Moreno, Francisco O'Valle, Abdulaziz Al-Rasheed, Hom-Lay Wang
BACKGROUND: Vertical bone augmentation (VBA) remains unpredictable and challenging for most clinicians. This study was aimed to compare hard tissue outcomes of VBA, with and without rhBMP-2, under space-making titanium mesh in a canine model. METHODS: Eleven male beagle dogs were used in the study. Experimental ridge defects were created to form atrophic ridges. VBA was performed via guide bone regeneration (GBR) using titanium mesh and allografts. In experimental hemimandibles, rhBMP-2/ACS was well mixed with allografts prior to procedures, whereas a control buffer was applied within controls...
May 26, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28548586/arthroscopic-treatment-of-osteochondral-lesions-of-the-talus-with-allograft-cartilage-matrix
#10
Jamal Ahmad, Mitchell Maltenfort
BACKGROUND: This prospective study evaluated the intermediate-term outcomes of operatively treating primary osteochondral lesions of the talus (OLT) of 1.5 cm(2) or smaller with arthroscopic excision, microfracture, and allograft cartilage extracellular matrix (ECM). METHODS: Between 2012 and 2015, 30 consecutive patients received allograft cartilage ECM at their microfractured OLT of 1.5 cm(2) or smaller after failing nonoperative treatment. Preoperative and postoperative function and pain were graded using the Foot and Ankle Ability Measure (FAAM) and a visual analog scale (VAS), respectively...
May 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28548559/the-yucatan-minipig-tmj-disc-structure-function-relationships-support-its-suitability-for-human-comparative-studies
#11
Natalia Vapniarsky, Ashkan Aryaei, Boaz Arzi, Jerry C Hu, David C Hatcher, Kyriacos A Athanasiou
Frequent involvement of the disc in temporomandibular joint (TMJ) disorders warrants attempts to tissue engineer TMJ disc replacements. Physiologically, a great degree of similarity is seen between humans and farm pigs (FPs), but the pig's rapid growth confers a significant challenge for in vivo experiments. Minipigs have a slower growth rate and are smaller than FPs, but minipig TMJ discs have yet to be fully characterized. The objective of this study was to determine the suitability of the minipig for TMJ studies by extensive structural and functional characterization...
May 26, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28548328/epithelioid-trophoblastic-tumor-of-the-uterus-a-case-report-with-radiologic-pathologic-correlation
#12
Ayumi Ohya, Kayoko Higuchi, Hisashi Shimojo, Yasunari Fujinaga, Masumi Kadoya, Shigeki Shiohara
Herein, we report a rare case of an epithelioid trophoblastic tumor of the uterus with radiologic-pathologic correlation in a 56-year-old postmenopausal woman. On T2-weighted magnetic resonance (MR) imaging, the tumor appeared as a hypointense irregular mass compared with the surrounding myometrium of the uterine corpus and encircled the cavity of the lower uterine segment. On dynamic contrast-enhanced MR images, the tumor appeared as a hypovascular mass and an inhomogeneously hyperintense mass in the delayed phase...
May 26, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28548240/viscoelastic-computational-modeling-of-the-human-head-neck-system-eigenfrequencies-and-time-dependent-analysis
#13
E Boccia, A Gizzi, C Cherubini, M G C Nestola, S Filippi
A subject-specific three-dimensional viscoelastic finite element model of the human head-neck system is presented and investigated based on Computed Tomography and Magnetic Resonance biomedical images. Ad hoc imaging processing tools are developed for the reconstruction of the simulation domain geometry and the internal distribution of bone and soft tissues. Materials viscoelastic properties are characterized point-wise through an image-based interpolating function used then for assigning the constitutive prescriptions of a heterogenous viscoelastic continuum model...
May 26, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28547920/pulmonary-pythiosis-in-a-canine-patient
#14
Darin Kepler, Robert Cole, Tekla Lee-Fowler, Jey Koehler, Stephanie Shrader, Joe Newton
A Staffordshire terrier presented for evaluation of a chronic, nonproductive cough that was unresponsive to antibiotic therapy. A large mass identified in the pulmonary hilum was most consistent with tracheobronchial lymphadenopathy on radiographic and computed tomography (CT) images. Bronchoscopy confirmed a mass compressing the dorsal portion of the intrathoracic trachea. Bronchoscopic biopsies of the tracheal mass revealed necrosuppurative and eosinophilic inflammation with intralesional Pythium insidiousum hyphae...
May 25, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28547827/digital-dissection-of-the-model-organism-xenopus-laevis-using-contrast-enhanced-computed-tomography
#15
Laura B Porro, Christopher T Richards
The African clawed frog, Xenopus laevis, is one of the most widely used model organisms in biological research. However, the most recent anatomical description of X. laevis was produced nearly a century ago. Compared with other anurans, pipid frogs - including X. laevis - exhibit numerous unusual morphological features; thus, anatomical descriptions of more 'typical' frogs do not detail many aspects of X. laevis skeletal and soft-tissue morphology. The relatively new method of using iodine-based agents to stain soft tissues prior to high-resolution X-ray imaging has several advantages over gross dissection, such as enabling dissection of very small and fragile specimens, and preserving the three-dimensional topology of anatomical structures...
May 26, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28547776/anatomical-relationship-of-maxillary-posterior-teeth-with-the-sinus-floor-and-buccal-cortex
#16
J K Jang, S W Kwak, J H Ha, H C Kim
This study aimed to evaluate the possibility of root fenestration or oroantral communication by evaluating the distance from root apex to the sinus floor and buccal cortex in maxillary posterior teeth by using cone-beam computed tomography (CBCT) images. The study included 2,182 roots of the maxillary posterior teeth from 219 patients after reviewing CBCT images of 462 patients according to the location of roots by two endodontists. The distances from each root apex to the maxillary sinus floor and buccal and palatal cortices were evaluated according to sex and age, and the mean values were compared by one-way analysis of variance and Mann-Whitney U test...
May 26, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28547740/biliary-duodenal-anastomosis-using-magnetic-compression-following-massive-resection-of-small-intestine-due-to-strangulated-ileus-after-living-donor-liver-transplantation-a-case-report
#17
Ryusuke Saito, Hiroyuki Tahara, Seiichi Shimizu, Masahiro Ohira, Kentaro Ide, Kohei Ishiyama, Tsuyoshi Kobayashi, Hideki Ohdan
BACKGROUND: Despite the improvements of surgical techniques and postoperative management of patients with liver transplantation, biliary complications are one of the most common and important adverse events. We present a first case of choledochoduodenostomy using magnetic compression following a massive resection of the small intestine due to strangulated ileus after living donor liver transplantation. CASE PRESENTATION: The 54-year-old female patient had end-stage liver disease, secondary to liver cirrhosis, due to primary sclerosing cholangitis with ulcerative colitis...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28547573/results-of-lumbar-spondylodeses-using-different-bone-grafting-materials-after-transforaminal-lumbar-interbody-fusion-tlif
#18
Nicolas Heinz vonderHoeh, Anna Voelker, Christoph-Eckhard Heyde
PURPOSE: Can a mixture of hydroxyapatite (HA) and autologous bone from decompression sites produce similar results when used for transforaminal lumbar interbody fusion (TLIF)? In the current literature, autologous iliac crest bone grafts (ICBGs) have been reported the gold standard for this procedure. Indeed, to date, no clinical data have confirmed that a mixture of equal volumes of HA and local autologous bone produce similar results in term of fusion as the same volume of autologous ICBG alone...
May 25, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28547178/clinical-impact-of-pet-ct-imaging-after-adjuvant-therapy-in-patients-with-oral-cavity-squamous-cell-carcinoma
#19
Huan-Chun Lin, Chung-Jan Kang, Shiang-Fu Huang, Hung-Ming Wang, Chien-Yu Lin, Li-Yu Lee, Chun-Ta Liao, Tzu-Chen Yen
PURPOSE: This single-center retrospective study of prospectively collected data was aimed at comparing the clinical outcomes of positron emission tomography/computed tomography (PET/CT) for patients with oral cavity squamous cell carcinoma (OSCC) with symptomatic recurrences identified by PET/CT imaging following adjuvant therapy (Group A) versus those of cases with asymptomatic recurrences diagnosed through periodic post-adjuvant therapy PET/CT surveillance (Group B). We also sought to establish the priority of salvage therapy in the two study groups...
May 26, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28547134/clinical-radiographic-and-biochemical-characteristics-of-adult-hypophosphatasia
#20
T Schmidt, H Mussawy, T Rolvien, T Hawellek, J Hubert, W Rüther, M Amling, F Barvencik
In this study, we report on clinical, radiographic and biochemical characteristics of 38 patients with adult hypophosphatasia. High-resolution peripheral quantitative computed tomography showed alterations of bone microstructure in a subgroup of 14 patients. Pyridoxal-5-phosphate levels correlated with the occurrence of fractures and the number of symptoms. INTRODUCTION: Hypophosphatasia (HPP) is a rare disorder with a wide range of clinical manifestations. A reduced enzymatic activity of alkaline phosphatase (ALP) is the key marker of the disease, causing an accumulation of ALP substrates such as pyridoxal-5-phosphate (PLP)...
May 25, 2017: Osteoporosis International
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