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thorax contrast

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
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
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
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
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
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
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
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
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
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
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
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
Andrew P Santoso, Kwang H Song, Yujiao Qin, Stephen J Gardner, Chang Liu, Indrin J Chetty, Benjamin Movsas, Munther Ajlouni, Ning Wen
BACKGROUND: This study investigates the effect of gantry speed on 4DCBCT image quality and dose for the Varian On-Board Imager®. METHODS: A thoracic 4DCBCT protocol was designed using a 125 kVp spectrum. Image quality parameters were evaluated for 4DCBCT acquisition using Catphan® phantom with real-time position management™ system for gantry speeds varying between 1.0 to 6.0°/s. Superior-inferior motion of the phantom was executed using a sinusoidal waveform with five second period...
2016: Radiation Oncology
E García Garrigós, J J Arenas Jiménez, J Sánchez Payá, M Sirera Matilla, À Gayete Cara
OBJECTIVES: To know the protocols used for staging bronchopulmonary carcinoma by computed tomography in Spain. MATERIAL AND METHODS: Radiologists in 129 hospitals were sent email questionnaires about the organization of their department, scanner type and manufacturer, study extension, techniques employed, and protocol for administering contrast material. RESULTS: A total of 109 hospitals responded with data from 91 teams. Most hospitals were affiliated with a university, and most departments were organized by organ-systems...
July 22, 2016: Radiología
Wolfgang Bothe, Mahmoud Diab, Romanus Ostermann, Michael Schwarzer, Luisa Woelfel, Sabine Bischoff, Harald Schubert, Torsten Doenst
In quadrupeds, the three-dimensional orientation of the heart with respect to the thorax is fundamentally different from humans. We assessed the best surgical approach to the tricuspid valve in sheep. In sheep cadavers different surgical access sites to the tricuspid valve were tested, the anatomy was analyzed and the optimal surgical approach to the tricuspid valve was determined. Afterwards, the surgical strategy was performed in 6 merino female sheep (48±6kg) in vivo using cardiopulmonary bypass and cardioplegic arrest...
July 25, 2016: Journal of Veterinary Science
Grace Tang, Christopher Moussot, Daniel Morf, Edward Seppi, Howard Amols
Most of the treatment units, both new and old models, are equipped with a megavoltage portal imager but its use for volumetric imaging is limited. This is mainly due to the poor image quality produced by the high-energy treatment beam (> 6MV). A linac at our center is equipped with a prototype 2.5 MV imaging beam. This study evaluates the feasibility of low-dose megavoltage cone-beam imaging with the 2.5MV beam and a thick cesium iodide detector, which is a high-efficiency imager. Basic imaging properties such as spatial resolution and modulation transfer function were assessed for the 2...
2016: Journal of Applied Clinical Medical Physics
Michael Åkesson, Leena Lehti, Peter Höglund, Per Åkeson, Johan Wassélius
BACKGROUND: High-quality non-invasive imaging of the deep venous system in the thorax is challenging, but nevertheless required for diagnosis of vascular pathology as well as for patient selection and preoperative planning for endovascular procedures. PURPOSE: To compare the diagnostic quality of Gadofosveset-enhanced thoracic magnetic resonance venography, seven consecutive patients with suspected or known disease affecting the central thoracic veins were compared to seven consecutive magnetic resonance venography using conventional gadolinium-based contrast agents...
July 6, 2016: Phlebology
Chantal B F Vogels, Jelke J Fros, Giel P Göertz, Gorben P Pijlman, Constantianus J M Koenraadt
BACKGROUND: Outbreaks of West Nile virus (WNV) have not occurred in northern Europe despite nearby circulation of WNV in the southern part of the continent. The main vector for WNV, the mosquito Culex (Cx.) pipiens, consists of two behaviorally distinct biotypes, pipiens and molestus, which can form hybrids. Although temperature has been shown to influence vector competence of Cx. pipiens for WNV and biotypes are differentially susceptible towards infection, the interaction between the two has not been elucidated...
2016: Parasites & Vectors
Jun Kuwabara, Yuji Watanabe, You Kojima, Naoyuki Higaki, Yoshiou Ikeda, Kouichi Sato, Motohira Yoshida, Yuji Yamamoto, Satoshi Kikuchi
INTRODUCTION: Spontaneous esophageal rupture is a rare condition with a high mortality rate, and it is generally treated by surgery. In the present report, successful non-surgical closure of spontaneous esophageal rupture by endoscopic ligation with snare loops in a patient with pyopneumothorax and septicemia is presented. CASE DESCRIPTION: The case of an 80-year-old man patient with spontaneous esophageal rupture who was cured by endoscopic ligation with snare loops is reported...
2016: SpringerPlus
Yingming Amy Chen, Vikramaditya Prabhudesai, Helene Castel, Samir Gupta
BACKGROUND: Hepatopulmonary syndrome (HPS) is defined by liver dysfunction, intrapulmonary vascular dilatations, and impaired oxygenation. The gold standard for detection of intrapulmonary vascular dilatations in HPS is contrast echocardiography. However, two small studies have suggested that patients with HPS have larger segmental pulmonary arterial diameters than both normal subjects and normoxemic subjects with cirrhosis, when measured by CT. We sought to compare CT imaging-based pulmonary vasodilatation in patients with HPS, patients with liver dysfunction without HPS, and matching controls on CT imaging...
2016: PloS One
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