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https://www.readbyqxmd.com/read/27908174/respiratory-motion-compensation-for-simultaneous-pet-mr-based-on-highly-undersampled-mr-data
#1
Christopher M Rank, Thorsten Heußer, Andreas Wetscherek, Martin T Freitag, Oliver Sedlaczek, Heinz-Peter Schlemmer, Marc Kachelrieß
PURPOSE: Positron emission tomography (PET) of the thorax region is impaired by respiratory patient motion. To account for motion, the authors propose a new method for PET/magnetic resonance (MR) respiratory motion compensation (MoCo), which uses highly undersampled MR data with acquisition times as short as 1 min/bed. METHODS: The proposed PET/MR MoCo method (4D jMoCo PET) uses radial MR data to estimate the respiratory patient motion employing MR joint motion estimation and image reconstruction with temporal median filtering...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27894354/do-mosquitoes-transmit-the-avian-malaria-like-parasite-haemoproteus-an-experimental-test-of-vector-competence-using-mosquito-saliva
#2
Rafael Gutiérrez-López, Josué Martínez-de la Puente, Laura Gangoso, Jiayue Yan, Ramón C Soriguer, Jordi Figuerola
BACKGROUND: The life-cycle of many vector-borne pathogens includes an asexual replication phase in the vertebrate host and sexual reproduction in the insect vector. However, as only a small array of parasites can successfully develop infective phases inside an insect, few insect species are competent vectors for these pathogens. Molecular approaches have identified the potential insect vectors of blood parasites under natural conditions. However, the effectiveness of this methodology for verifying mosquito competence in the transmission of avian malaria parasites and related haemosporidians is still under debate...
November 28, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27891001/rigid-bronchoscopic-management-of-acute-respiratory-failure-in-a-30-year-old-woman
#3
Karan Madan, Ashesh Dhungana, Neha Kawatra Madan, Anant Mohan, Vijay Hadda, Rakesh Garg, Deepali Jain, Randeep Guleria
A 30-year-old woman presented with a history of progressive shortness of breath, cough, and hoarseness. Stridor was audible on examination. Chest X-ray showed normal lung fields and contrast-enhanced computed tomography thorax showed lower tracheal occlusion with endoluminal growth. Diagnostic flexible bronchoscopy demonstrated multiple whitish glistening nodules over both vocal cords and lower tracheal occlusion by whitish nodular growth. In view of critical central airway obstruction, rigid bronchoscopy and excision of the lower tracheal growth were performed...
November 2016: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/27880736/experimental-validation-of-a-multi-energy-x-ray-adapted-scatter-separation-method
#4
A Sossin, V Rebuffel, J Tabary, J M Létang, N Freud, L Verger
Both in radiography and computed tomography (CT), recently emerged energy-resolved x-ray photon counting detectors enable the identification and quantification of individual materials comprising the inspected object. However, the approaches used for these operations require highly accurate x-ray images. The accuracy of the images is severely compromised by the presence of scattered radiation, which leads to a loss of spatial contrast and, more importantly, a bias in radiographic material imaging and artefacts in CT...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27845360/pathophysiological-mechanisms-underlying-phenotypic-differences-in-pulmonary-radioresponse
#5
Isabel L Jackson, Yuji Zhang, Søren M Bentzen, Jingping Hu, Angel Zhang, Zeljko Vujaskovic
Differences in the pathogenesis of radiation-induced lung injury among murine strains offer a unique opportunity to elucidate the molecular mechanisms driving the divergence in tissue response from repair and recovery to organ failure. Here, we utilized two well-characterized murine models of radiation pneumonitis/fibrosis to compare and contrast differential gene expression in lungs 24 hours after exposure to a single dose of whole thorax lung irradiation sufficient to cause minor to major morbidity/mortality...
November 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27813098/four-cases-of-pulmonary-thromboembolism-diagnosed-by-endobronchial-ultrasound
#6
Onur Fevzi Erer, Pinar Cimen, Mehmet Unlu, Nuran Katgi
Endobronchial ultrasound (EBUS) is a technique for the detection of mediastinal abnormalities. A total of 548 EBUS procedures were performed for various indications, and in four cases (0.7%), filling defects in central pulmonary arteries were demonstrated fortuitously during the procedure. Subsequently, all patients underwent contrast-enhanced CT of the thorax to confirm the diagnosis of pulmonary thromboembolism (PTE). In three of the four cases, there was a concomitant lung cancer. PTE can be incidentally detected during EBUS; therefore, pulmonary arteries should be examined carefully during EBUS in all patients, particularly in patients with suspected or proven malignancy...
November 3, 2016: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/27785331/congenital-esophageal-duplication-cyst-a-rare-cause-of-dysphagia-in-an-adult
#7
Nikhil Sonthalia, Samit S Jain, Ravindra G Surude, Ashok R Mohite, Pravin M Rathi
Esophageal duplication cyst is a rare congenital embryonal gastrointestinal (GI) malformation which is diagnosed most commonly in childhood. In adults, they can present with a variety of symptoms ranging from dysphagia, chest pain, epigastric discomfort, and vomiting to more serious complications including infections, hemorrhage, and ulcerations. A 30-year-old male presented with gradually progressive dysphagia to solids for 4 months without significant weight loss. Clinical examination and routine laboratory examination were unrevealing...
October 2016: Gastroenterology Research
https://www.readbyqxmd.com/read/27775076/multiplatform-based-molecular-subtypes-of-non-small-cell-lung-cancer
#8
F Chen, Y Zhang, E Parra, J Rodriguez, C Behrens, R Akbani, Y Lu, J M Kurie, D L Gibbons, G B Mills, I I Wistuba, C J Creighton
Non-small-cell lung cancer (NSCLC) demonstrates remarkable molecular diversity. With the completion of The Cancer Genome Atlas (TCGA), there is opportunity for systematic analyses of the entire TCGA NSCLC cohort, including comparisons and contrasts between different disease subsets. On the basis of multidimensional and comprehensive molecular characterization (including DNA methylation and copy, and RNA and protein expression), 1023 NSCLC cases-519 from TCGA adenocarcinoma (AD) project and 504 from TCGA squamous cell carcinoma (SQCC) project-were classified using a 'cluster-of-clusters' analytic approach...
October 24, 2016: Oncogene
https://www.readbyqxmd.com/read/27749415/incidental-sclerosing-pneumocytoma-detected-on-bone-scintigraphy
#9
Alex Cheen Hoe Khoo, Fadzilah Hamzah, Choo Khoon Ong
Nonosseous uptake in Tc-hydroxymethylene bone scintigraphy should always be evaluated for any possibility of pathological changes. We share interesting images of a 60-year-old woman initially investigated for suspected osteomyelitis of the left femur but found to have an extraosseous uptake in the right hemithorax on bone scintigraphy. Plain chest radiograph followed by contrast-enhanced CT of the thorax revealed the presence of a lung mass in the right lower lobe with no lymphadenopathy. CT-guided biopsy yielded fibrocollagenous tissue, partly lined by benign pneumocytes...
October 5, 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/27696307/optimal-transducer-level-for-atrial-and-pulmonary-arterial-pressure-measurement-in-patients-with-functional-single-ventricle
#10
Yong-Hee Park, Da-Hye Yoo, Eun-Hee Kim, In-Kyung Song, Ji-Hyun Lee, Hee-Soo Kim, Woong-Han Kim, Jin-Tae Kim
This study aimed to investigate the optimal transducer level for accurate measurement of atrial and pulmonary arterial pressures in the supine position for patients with functional single ventricle. Contrast-enhanced chest computed tomographic images of 108 patients who underwent either the bidirectional cavopulmonary shunt (BCPS) placement or the Fontan procedure were reviewed. Vertical distances from the skin of the back to the uppermost levels of fluid in the single atrium or the pulmonary artery confluence and their ratios to the greatest anteroposterior (AP) diameter of the thoracic cage were determined...
October 1, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27666805/endovascular-treatment-of-late-aortic-erosive-lesion-by-pedicle-screw-without-screw-removal-case-report-and-literature-review
#11
Antonio Eduardo Zerati, Dafne Braga Diamante Leiderman, William Gemio Jacobsen Teixeira, Douglas Kenji Narazaki, Alexandre Fogaça Cristante, Nelson Wolosker, Nelson de Luccia, Tarcísio Eloy Pessoa de Barros Filho
OBJECTIVE: To describe the endovascular treatment of late aortic erosive lesion by pedicle screw without screw removal. DESIGN: Case report. METHODS AND RESULTS: A breast cancer patient had a pathological fracture on T10, with spinal cord compression, and a pseudoaneurysm of the aorta in contact with an anterolateral pedicle screw. Endovascular surgery corrected the aortic lesion and allowed decompression, a week later, by posterior arthrodesis (T7-L1), with screw maintainance...
September 22, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27598421/culex-quinquefasciatus-from-rio-de-janeiro-is-not-competent-to-transmit-the-local-zika-virus
#12
Rosilainy Surubi Fernandes, Stéphanie Silva Campos, Anielly Ferreira-de-Brito, Rafaella Moraes de Miranda, Keli Antunes Barbosa da Silva, Marcia Gonçalves de Castro, Lidiane M S Raphael, Patrícia Brasil, Anna-Bella Failloux, Myrna C Bonaldo, Ricardo Lourenço-de-Oliveira
BACKGROUND: The Americas have suffered a dramatic epidemic of Zika since May in 2015, when Zika virus (ZIKV) was first detected in Brazil. Mosquitoes belonging to subgenus Stegomyia of Aedes, particularly Aedes aegypti, are considered the primary vectors of ZIKV. However, the rapid spread of the virus across the continent raised several concerns about the transmission dynamics, especially about potential mosquito vectors. The purpose of this work was to assess the vector competence of the house mosquito Culex quinquefasciatus from an epidemic Zika area, Rio de Janeiro, Brazil, for local circulating ZIKV isolates...
September 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27588815/motion-aware-temporal-regularization-for-improved-4d-cone-beam-computed-tomography
#13
Cyril Mory, Guillaume Janssens, Simon Rit
Four-dimensional cone-beam computed tomography (4D-CBCT) of the free-breathing thorax is a valuable tool in image-guided radiation therapy of the thorax and the upper abdomen. It allows the determination of the position of a tumor throughout the breathing cycle, while only its mean position can be extracted from three-dimensional CBCT. The classical approaches are not fully satisfactory: respiration-correlated methods allow one to accurately locate high-contrast structures in any frame, but contain strong streak artifacts unless the acquisition is significantly slowed down...
September 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27584084/thoracic-splenosis-report-of-a-case-and-review-of-the-diagnostic-workup
#14
Walter Bugiantella, Federico Crusco, Nicola Avenia, Rondelli Fabio
UNLABELLED: Splenosis is the autoimplantation of splenic tissue to ectopic sites after spleen injury. Although splenosis most commonly occurs in the abdomen, it may occur in the thorax in case of diaphragm rupture. Thoracic splenosis (TS) is often asymptomatic and is diagnosed incidentally in the course of chest examination. We describe the case of a man, with a history of thoracoabdominal trauma, undergoing routine chest radiography with the evidence of radio-opaque images close to the inferior left curvature of the cardiac shadow, which resulted to be nodules of TS at the contrast enhanced CT scan...
2016: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/27578939/thoracic-aortic-aneurysm-a-rare-cause-of-elevated-hemidiaphragm
#15
Md Arshad Ejazi, Md Mazhar Alam, Mohammad Shameem, Rakesh Bhargava, C G Adil Wafi, Salauddin
Phrenic nerve palsy causing hemidiaphragm paralysis is a very uncommon feature of thoracic aortic aneurysm. In one case, a 30 year male complained of chronic dull aching chest pain, and hoarseness of voice; posteroanterior view chest radiograph revealed large spherical radiopacity on the left upper lung zone with smooth lobulated margin with elevated left hemidiaphragm. On Colour Doppler sonography, lesion was anechoic on gray scale sonography but on Doppler analysis revealed intense internal vascularity within it with characteristic "Ying Yang" sign...
July 2016: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/27578936/role-of-virtual-and-flexible-bronchoscopy-in-the-management-of-a-case-of-unnoticed-foreign-body-aspiration-presented-as-nonresolving-pneumonia-in-an-adult-female
#16
Ravish Manmohan Kshatriya, Nimit V Khara, Rajiv P Paliwal, Sateesh N Patel
It is not so common to aspirate foreign body in normal adults without any predisposing factors as compared to children and those with the altered neurological state. Endobronchial foreign bodies are one of the causes of obstructive pneumonia and difficult to diagnose as signs and symptoms are often nonspecific. However, once they are diagnosed, they can generally be removed, leading to rapid and drastic resolution of symptoms. Bronchoscopy is the gold standard in the identification and localization of an airway foreign body and also for better management of the ailment...
July 2016: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/27562479/ct-imaging-before-transcatheter-aortic-valve-implantation-tavi-using-variable-helical-pitch-scanning-and-its-diagnostic-performance-for-coronary-artery-disease
#17
Shunsuke Matsumoto, Yoshitake Yamada, Masahiro Hashimoto, Teppei Okamura, Minoru Yamada, Fumiaki Yashima, Kentaro Hayashida, Keiichi Fukuda, Masahiro Jinzaki
OBJECTIVES: To evaluate the effectiveness of CT before TAVI using variable helical pitch (VHP) scanning and its diagnostic performance for coronary artery disease (CAD). METHODS: Sixty patients (84.4 ± 4.6 years) scheduled for TAVI underwent CT using VHP scanning with the contrast material (CM) volume calculated as scanning time × weight [kg] × 0.06 mL. Retrospective electrocardiography (ECG)-gated scanning was utilized to examine the thorax, and non-ECG-gated scanning of the abdomen immediately followed...
August 25, 2016: European Radiology
https://www.readbyqxmd.com/read/27525030/unique-wing-scale-photonics-of-male-rajah-brooke-s-birdwing-butterflies
#18
Bodo D Wilts, Marco A Giraldo, Doekele G Stavenga
BACKGROUND: Ultrastructures in butterfly wing scales can take many shapes, resulting in the often striking coloration of many butterflies due to interference of light. The plethora of coloration mechanisms is dazzling, but often only single mechanisms are described for specific animals. RESULTS: We have here investigated the male Rajah Brooke's birdwing, Trogonoptera brookiana, a large butterfly from Malaysia, which is marked by striking, colorful wing patterns...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/27504353/video-assisted-thoracoscopic-surgery-vats-for-excision-of-an-ectopic-anterior-mediastinal-intra-thymic-parathyroid-adenoma
#19
Dukhabandhu Naik, Kumaradoss Felix Jebasingh, Ramprasath, Gnanamuthu Birla Roy, Mazhuvanchary Jacob Paul
Ectopic anterior mediastinal parathyroid adenoma is a rare cause of Primary Hyperparathyroidism (PHPT). Imaging studies such as Technetium-99m ((99m)Tc) sestamibi parathyroid scan along with a Single Photon Emission Computerized Tomogram (SPECT), and contrast enhanced Computerized Tomogram (CT) of the neck and thorax can precisely localize the ectopic mediastinal parathyroid adenoma. We report a 40-year-old gentleman who presented with persistent pain in the right shoulder following trivial trauma. His biochemical investigations showed an elevated serum calcium of 11...
June 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27497375/dual-energy-computed-tomographic-imaging-of-pulmonary-hypertension
#20
Anne-Lise Hachulla, Frédéric Lador, Paola M Soccal, Xavier Montet, Maurice Beghetti
Dual-energy computed tomography (DECT) angiography of the chest provides a combined morphological and functional analysis of the lung, usually obtained in a single acquisition without extra radiation or injection of extra intravenous iodine contrast. The parenchymal iodine maps generated by DECT are well correlated with scintigraphy, and are becoming an essential tool for evaluating patients with pulmonary vascular diseases. With a single DECT acquisition, complete imaging of pulmonary hypertension is now available, displaying vascular anatomy, parenchymal morphology and functional assessment...
2016: Swiss Medical Weekly
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