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https://www.readbyqxmd.com/read/29782653/data-driven-gating-in-pet-influence-of-respiratory-signal-noise-on-motion-resolution
#1
Florian Büther, Iris Ernst, Lynn Johann Frohwein, Joost Pouw, Klaus Peter Schäfers, Lars Stegger
PURPOSE: Data-driven gating (DDG) approaches for positron emission tomography (PET) are interesting alternatives to conventional hardware-based gating methods. In DDG, the measured PET data themselves are utilized to calculate a respiratory signal that is subsequently used for gating purposes. The success of gating is then highly dependent on the statistical quality of the PET data. In this study we investigate how this quality determines signal noise and thus motion resolution in clinical PET scans using a center-of-mass-based (COM) DDG approach, specifically with regard to motion management of target structures in future radiotherapy planning applications...
May 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29782280/-left-ventricular-systolic-dysfunction-in-young-subjects-with-marfanoid-habitus
#2
E V Timofeev, E G Malev, E V Zemtsovskiy
BACKGROUND: In Marfan syndrome early impairment of left ventricular systolic function has been reported. Our aim was to evaluate the left ventricular systolic function in young adults with Marfanoid habitus (MH) (includes arachnodactylia, dolichostenomelia, high palate, deformations of the thorax). METHODS: We studied 137 young subjects (mean age 21.3±1.5) - 58 male, 79 female. Transthoracic echocardiography (Vivid 7 Dimension, GE) was performed in 24 asymptomatic MH with excluded Marfan syndrome and 42 healthy control subjects...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29780894/multiple-re-entry-closures-after-tevar-for-ruptured-chronic-post-dissection-thoraco-abdominal-aortic-aneurysm
#3
R Kinoshita, F Ganaha, J Ito, N Ohyama, N Abe, T Yamazato, H Munakata, K Mabuni, T Kugai
Introduction: Although thoracic endovascular aortic repair (TEVAR) has become a promising treatment for complicated acute type B dissection, its role in treating chronic post-dissection thoraco-abdominal aortic aneurysm (TAA) is still limited owing to persistent retrograde flow into the false lumen (FL) through abdominal or iliac re-entry tears. Report: A case of chronic post-dissection TAA treatment, in which a dilated descending FL ruptured into the left thorax, is described...
2018: EJVES Short Reports
https://www.readbyqxmd.com/read/29780046/-study-of-dose-recalculation-method-on-overriding-lung-density-using-cbct-image-in-the-thorax
#4
Hiroshi Watanabe, Shuichi Ozawa, Atsuyuki Ohashi, Koji Ikenaga, Kentaro Miki, Akito Saito, Teiji Nishio, Yuji Murakami, Yasushi Nagata
It is a useful method for the adaptive radiotherapy (ART) to calculate absorbed dose accurately on the image set taken by on-board cone beam computed tomography (CBCT) attached to linac for image-guided radiation therapy (IGRT). For this purpose, a simple and accurate calculation method is necessary. Several papers report that it is possible to calculate easily and accurately by using several methods of researches in the neck and prostate, but the lung density varies greatly depending on patient thorax condition...
2018: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/29774930/-advertent-problems-about-gastric-stump-cancer-surgery
#5
Han Liang
Due to different disease background of gastric stump cancer(GSC) patients (benign or malignant lesion, reconstruction of digestive tract, etc.), the GSC surgical procedure and the difficulty of lymphadenectomy are also different. The extent of radical lymphadenectomy for gastric stump cancer should extend beyond D2 lymphadenectomy, according to the different backgrounds of initial disease, reconstructions, and tumor location. A lymphadenectomy should include the lymph nodes in anterior (No.17) and posterior (No...
May 25, 2018: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/29772057/a-4d-global-respiratory-motion-model-of-the-thorax-based-on-ct-images-a-proof-of-concept
#6
H Fayad, M Gilles, T Pan, D Visvikis
PURPOSE: Respiratory motion reduces the sensitivity and specificity of medical images especially in the thoracic and abdominal areas. It may affect applications such as cancer diagnostic imaging and/or radiation therapy (RT). Solutions to this issue include modelling of the respiratory motion in order to optimize both diagnostic and therapeutic protocols. Personalised motion modeling required patient specific four dimensional (4D) imaging which in the case of 4D computed tomography (4D CT) acquisition is associated with an increased dose...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29765877/gender-related-differences-in-reliability-of-thorax-lumbar-and-pelvis-kinematics-during-gait-in-patients-with-non-specific-chronic-low-back-pain
#7
Rasool Bagheri, Ismail Ebrahimi Takamjani, Mehdi Dadgoo, Amir Ahmadi, Javad Sarrafzadeh, Mohammad Reza Pourahmadi, Amir-Salar Jafarpisheh
Objective: To evaluate test-retest reliability of trunk kinematics relative to the pelvis during gait in two groups (males and females) of patients with non-specific chronic low back pain (NCLBP) using three-dimensional motion capture system. Methods: A convenience sample of 40 NCLBP participants (20 males and 20 females) was evaluated in two sessions. Participants were asked to walk with self-selected speed and kinematics of thorax and lumbar spine were captured using a 6-infrared-cameras motion-analyzer system...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29763860/ants-and-their-nests-as-indicators-for-industrial-heavy-metal-contamination
#8
Oksana Skaldina, Sirpa Peräniemi, Jouni Sorvari
Ants accumulate heavy metals and respond to pollution with modification in species composition, community structure, altered behaviour and immunity. However, the levels of heavy metals in ants' nests and explicit individual-level responses towards heavy metals have not been revealed. We found that red wood ants Formica lugubris accumulate high and correlated values of such heavy metals as Al, Cd, Co, Cu, Fe, Ni, Pb and Zn both in ants and nest material near cobalt smelter in Finland. Relative differences in metal concentrations were higher in nests than in ants...
May 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29762462/the-safety-and-utility-of-fiberoptic-bronchoscopy-in-the-very-elderly
#9
Cameron W McLaughlin, Andrew J Skabelund, Ellis R Easterling, Michael J Morris
BACKGROUND: Flexible bronchoscopy (FB) is a common modality for diagnostic sampling within the thorax. It is utilized often in the elderly population, but there is limited data on the safety and utility of the procedure in the very elderly. METHODS: FBs performed outside the intensive care unit in the San Antonio Military Health System on patients 85 years and older were reviewed. Outcomes including indications, complications, diagnostic yield, and final diagnosis were compared with a control group consisting of patients' ages of 65 to 79 years old...
May 14, 2018: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/29759800/-hypertensive-crisis-and-anticholinergic-toxidrome-secondary-to-accidental-consumption-of-datura-stramonium-in-two-children
#10
D D Batouche, N-F Benatta, K Tabeliouna, S Boudjahfa, Y Touhami, S Hakkoum
OBJECTIVE: To identify a hypertensive clinical form of atropine or anticholinergic toxidrome secondary to accidental consumption of Datura seeds. PATIENTS AND METHODS: We report two cases of Datura intoxication in two children who presented marked anticholinergic syndrome whose diagnosis was made by the anamnesis and the clinic. RESULT: Patient 1: A 5-year-old boy, returns home agitated with balance disorders. He was admitted to pediatric resuscitation unit...
May 11, 2018: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/29759487/clinical-examination-of-proton-pencil-beam-scanning-on-a-moving-anthropomorphic-lung-phantom
#11
Peng Wang, Shikui Tang, Paige A Taylor, David E Cummings, Martin Janson, Erik Traneus, Jared D Sturgeon, Andrew K Lee, Chang Chang
The objective of this study was to examine the use of proton pencil beam scanning for the treatment of moving lung tumors. A single-field uniform dose proton pencil beam scanning (PBS) plan was generated for the standard thorax phantom designed by the Imaging and Radiation Oncology Core (IROC) Houston QA Center. Robust optimization, including range and setup uncertainties as well as volumetric repainting, was used for the plan. Patient-specific quality assurance (QA) measurements were performed using both a water tank and a custom heterogeneous QA phantom...
May 11, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29758181/development-and-validation-of-web-based-nomograms-to-precisely-predict-conditional-risk-of-site-specific-recurrence-for-patients-with-completely-resected-non-small-cell-lung-cancer-a-multi-institutional-study
#12
Yang Zhang, Difan Zheng, Juntao Xie, Yuan Li, Yiyang Wang, Chenguang Li, Jiaqing Xiang, Yawei Zhang, Hong Hu, Yihua Sun, Haiquan Chen
BACKGROUND: There is currently no consensus regarding the optimal postoperative follow-up strategy for completely resected non-small cell lung cancer (NSCLC) patients. We aimed to develop web-based nomograms to precisely predict site-specific postoperative recurrence of NSCLC patients and to guide individual surveillance strategies including when to follow-up and what diagnostic tests to perform. METHODS: We investigated the pattern of recurrence in a series of 2017 NSCLC (squamous cell carcinoma and non-lepidic invasive adenocarcinoma) patients who underwent complete surgical resection in Fudan University Shanghai Cancer Center (development cohort), and developed web-based clinicopathologic prediction models for conditional risk of site-specific recurrence based on Cox regression...
May 11, 2018: Chest
https://www.readbyqxmd.com/read/29757512/description-of-a-new-species-of-nesotriatoma-usinger-1944-from-cuba-and-revalidation-of-synonymy-between-nesotriatoma-bruneri-usinger-1944-and-n-flavida-neiva-1911-hemiptera-reduviidae-triatominae
#13
Jader de Oliveira, José Manuel Ayala, Silvia Andrade Justi, João Aristeu da Rosa, Cleber Galvão
Nesotriatoma confusa sp. nov. (Hemiptera, Reduviidae, Triatominae) is described based on specimens from Cuba. From one male, one female, and eleven nymphs of a then-undescribed species of Nesotriatoma collected in Cuba, a colony was formed and its specimens were used to describe N. confusa sp. nov. Characters were observed on the head, thorax, abdomen, female external genitalia, and male genitalia with optical microscopy and scanning electron microscopy. We concluded that N. bruneri (Usinger, ) was indeed a synonym of N...
June 2018: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/29755815/late-endobronchial-pulmonary-metastasis-in-a-patient-with-breast-cancer
#14
İbrahim Güven Çoşğun, Turgut Kaçan, Gül Erten
The lung is a common location for malignant metastases. However, endobronchial metastases from nonpulmonary neoplasms are rare. Metastatic breast cancer usually occurs in 2-3 years of the disease course. A 65-year-old woman visited our hospital for the evaluation of dry cough. The patient had a history of breast cancer, which was treated with modified radical mastectomy and axillary dissection 10 years ago; she was then treated with aromatase inhibitor for 5 years. Chest X-ray revealed right hilum enlargement...
April 2018: Turkish Thoracic Journal
https://www.readbyqxmd.com/read/29755370/effects-of-ethanol-on-sensory-inputs-to-the-medial-giant-interneurons-of-crayfish
#15
Matthew E Swierzbinski, Jens Herberholz
Crayfish are capable of two rapid, escape reflexes that are mediated by two pairs of giant interneurons, the lateral giants (LG) and the medial giants (MG), which respond to threats presented to the abdomen or head and thorax, respectively. The LG has been the focus of study for many decades and the role of GABAergic inhibition on the escape circuit is well-described. More recently, we demonstrated that the LG circuit is sensitive to the acute effects of ethanol and this sensitivity is likely mediated by interactions between ethanol and the GABAergic system...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29753653/cardiopulmonary-bypass-in-non-cardiac-surgery
#16
Timothy Luke Surman, Michael George Worthington, Jose Martinelli Nadal
BACKGROUND: Cardiopulmonary bypass (CPB) and extracorporeal membrane oxygenation (ECMO) are used to facilitate circulatory support in standard cardiac surgery and emergency intervention, but CPB and ECMO are not used routinely in non-cardiac surgery involving the thorax and major vessels. The primary aim of this study was to identify the type of non-cardiac procedures and bypass used in our institution and review the patient outcomes including perioperative and bypass complications. METHODS: A retrospective study was performed within the Royal Adelaide Hospital Cardiothoracic Surgery Unit (CTSU) that examined all operations between 2006 and 2014...
April 19, 2018: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29752568/morphology-ultrastructure-and-chemical-compounds-of-the-osmeterium-of-heraclides-thoas-lepidoptera-papilionidae
#17
Luis Carlos Martínez, Angelica Plata-Rueda, Guilherme da Silva Neves, Jamile Fernanda Cossolin, Marcelo Henrique Dos Santos, José Cola Zanuncio, José Eduardo Serrão
The osmeterium, found in papilionoid larvae, is an eversible organ with an exocrine gland that produces substances in response to the mechanical disturbances caused by natural enemies. The anatomy, histology and ultrastructure of the osmeterium, and the chemical composition of its secretion in Heraclides thoas (Lepidoptera: Papilionidae) were studied. Heraclides thoas larvae have a Y-shaped osmeterium in the thorax. The surface of the osmeterium has a rough cuticle lining cells with papillae and irregular folds, whereas the cells that limited the gland pores are irregular, folded, and devoid of papillae...
May 11, 2018: Protoplasma
https://www.readbyqxmd.com/read/29752051/effect-of-shoulder-model-complexity-in-upper-body-kinematics-analysis-of-the-golf-swing
#18
M Bourgain, S Hybois, P Thoreux, O Rouillon, P Rouch, C Sauret
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29751199/intrapericardial-gossypiboma-rare-cause-of-intrathoracic-mass
#19
Anil Kumar, Shiv Shankar Paswan, Rajinder Prashad, Rekha Kumari, Bindey Kumar
INTRODUCTION: Gossypiboma is a retained surgical sponge inside our body after surgical intervention. It is most commonly found in abdominal cavity. Its occurrence in thoracic cavity as intrapericardial gossypiboma is extremely rare. PRESENTATION OF CASE: We present a 25 year old male with complaint of chest pain for 1 year. He had a history of total correction of Tetralogy of fallot 14 years back, at another hospital. On clinical examination and investigations including contrast enhanced computed tomography (CECT) of thorax; diagnosis of right anterior mediastinal mass of germ cell tumor was made and planned for thoracotomy...
May 3, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29750934/lung-hydatid-cyst-treatment-with-laparotomy-a-new-and-different-technique
#20
Yener Aydin, Ilker Ince, Atila Turkyilmaz, Atilla Eroglu
We present the case of a patient with a pulmonary hydatid cyst. The patient underwent laparotomy for hepatic and splenic cysts, and we performed cystotomy and capitonnage using a transdiaphragmatic intervention. The pulmonary hydatid cyst was located at the base of the lung and near the diaphragm. The diaphragm was cut about 5 cm at the front and the thorax was entered.The pulmonary cyst was treated intra-abdominally. This technique is effective and safe and prevents the patient from undergoing a second operation...
May 8, 2018: Annals of Thoracic Surgery
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