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https://www.readbyqxmd.com/read/28590940/simdosect-dose-reporting-software-based-on-monte-carlo-simulation-for-a-320-detector-row-cone-beam-ct-scanner-and-icrp-computational-adult-phantoms
#1
Maria Cros, Raoul Joemai, Jacob Koos Geleijns, Diego Molina, Marçal Salvadó
This study aims to develop and test software for assessing and reporting doses for standard patients undergoing computed tomography (CT) examinations in a 320 detector-row cone-beam scanner. The software, called SimDoseCT, is based on Monte Carlo (MC) simulation code, which was developed to calculate organ- and effective doses in ICRP anthropomorphic adult reference computational phantoms for acquisitions with the Aquilion ONE CT scanner (Toshiba). MC simulation was validated by comparing CTDI measurements within standard CT dose phantoms with results from simulation under the same conditions...
June 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28566083/-a-case-of-coccidioidomycosis-in-turkey-imported-from-the-united-states-of-america
#2
Seniha Başaran, Nilgün Karabıçak, Serap Şimşek Yavuz, Nathan P Wiederhold, Seda Şafak, Aysun Sarıbuğa, Deanna A Sutton, Züleyha Bingöl, Atahan Çağatay, Halit Özsüt, Zeki Kılıçaslan, Haluk Eraksoy
Coccidioidomycosis caused by Coccidioides immitis or Coccidioides posadasii is a rare infectious disease except in endemic regions. In this report the third documented imported case of coccidioidomycosis in Turkey was presented. A thirty-year-old male patient was admitted to our hospital with fever and purulent drainage from his chest tube. He had worked in Arizona, USA, until 4 months before this presentation. While in Arizona, he experienced cough and hemoptysis and was diagnosed as pulmonary coccidioidomycosis...
April 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28529813/difficult-management-of-a-double-lumen-endotracheal-tube-and-difficult-ventilation-during-robotic-thymectomy-with-carbon-dioxide-insufflation
#3
Yuki Sugiyama, Kunihiro Mitsuzawa, Yuki Yoshiyama, Fumiko Shimizu, Satoshi Fuseya, Takashi Ichino, Hiroyuki Agatsuma, Takayuki Shiina, Ken-Ichi Ito, Mikito Kawamata
Robotic surgery with carbon dioxide (CO2) insufflation to the thorax is frequently performed to gain a better operative field of view, although its intraoperative complications have not yet been discussed in detail. We treated two patients with difficult ventilation caused by distal migration of a double-lumen endotracheal tube (DLT) during robotic thymectomy. In the first case, migration of the DLT during one-lung ventilation (OLV) occurred after CO2 insufflation to the bilateral thoraxes was started. Oxygenation rapidly deteriorated because dependent lung expansion was restricted by CO2 insufflation...
2017: Case Reports in Surgery
https://www.readbyqxmd.com/read/28515948/cerebral-air-embolism-associated-with-penetrating-lung-injury-a-case-report-and-review-of-the-literature
#4
Ayumu Yamaoka, Kei Miyata, Eichi Narimatsu, Eiji Sakawaki, Sonoko Sakawaki, Suguru Hirayama, Shuji Uemura, Naoya Yama
CASE: A 44-year-old man intentionally stabbed himself in the anterior neck and left thorax with a fruit knife. Physical examination revealed two open wounds entering the thoracic cavity in the front chest, and a stab wound entering the trachea at the neck. Two chest tubes were initially inserted for the left lung injury with open hemopneumothorax. Nevertheless, the worsening oxygenation required positive pressure ventilation (PPV) with endotracheal intubation. OUTCOME: Right hemiparesis was found during weaning from PPV...
April 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/28512556/pediatric-tuberculosis-in-northern-sardinia
#5
Maria Grazia Clemente, Elena Dore, Lidia Abis, Paola Molicotti, Stefania Zanetti, Paolina Olmeo, Roberto Antonucci
BACKGROUND AND OBJECTIVES: Migration flux is an increasing phenomenon in Italy, and it raises several public health issues and concerns in pediatric infectious diseases. This study investigated the clinical characteristics and outcomes of a pediatric population at high-risk for tuberculosis (TB) and the potential role of immigration as a risk factor. DESIGN: We performed an observational retrospective study of children referred to the only Pediatric Infectious Diseases Unit for Northern Sardinia over a 6-year-period (2009-2014)...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28453660/effect-of-patient-size-anatomical-location-and-modulation-strength-on-dose-delivered-and-image-quality-on-ct-examination
#6
Joël Greffier, Ahmed Larbi, Francesco Macri, Jean-Paul Beregi, Fabricio Pereira
To study the effect of patient size, anatomical location and modulation strength (MS) on image-quality and delivered dose of CT scans acquired with automatic-exposure-control system (AEC). Four anthropomorphic phantoms (three paediatric and one thin adult) were studied, and normal and obese adults were simulated by placing bolus plates around the adult phantom. Thorax and abdomen-pelvis CT were performed using an AEC system equipped with five possible MS. Modulated tube current (mAsmod) was compared to Reference mAs and image-noise was assessed...
April 27, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28408977/mitogenomes-of-giant-skipper-butterflies-reveal-an-ancient-split-between-deep-and-shallow-root-feeders
#7
Jing Zhang, Qian Cong, Xiao-Ling Fan, Rongjiang Wang, Min Wang, Nick V Grishin
Background: Giant-Skipper butterflies from the genus Megathymus are North American endemics. These large and thick-bodied Skippers resemble moths and are unique in their life cycles. Grub-like at the later stages of development, caterpillars of these species feed and live inside yucca roots. Adults do not feed and are mostly local, not straying far from the patches of yucca plants. Methods: Pieces of muscle were dissected from the thorax of specimens and genomic DNA was extracted (also from the abdomen of a specimen collected nearly 60 years ago)...
2017: F1000Research
https://www.readbyqxmd.com/read/28403899/hepato-bronchial-fistula-secondary-to-perforated-sigmoid-diverticulitis-a-case-report
#8
Jun Sunny Yin, Shaylan Govind, Daniele Wiseman, Richard Inculet, Raymond Kao
BACKGROUND: Patients with diverticulitis are predisposed to hepatic abscesses via seeding through the portal circulation. Hepatic abscesses are well-documented sequelae of diverticulitis, however instances of progression to hepato-bronchial fistulization are rare. We present a case of diverticulitis associated with hepatic abscess leading to hepato-bronchial fistulization, which represents a novel disease course not yet reported in the literature. CASE PRESENTATION: A 61-year-old Caucasian man presented with a history of unintentional weight loss and dyspnea both at rest and with exertion...
April 13, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28396224/-%C3%A3-tienne-destot-1864-1918-or-the-other-father-of-french-radiology
#9
N Foray, M Amiel, R Mornex
Étienne Destot is a French physician from Burgundy who benefited, during his studies in Lyon, from the quality of teaching of the best specialists of the time: Augagneur for hygiene, Testut for anatomy, Ollier for surgery, Lépine for the medical applications of electricity and the Lumière brothers for the technological development. During its experiments, he met Despeignes, the first radiation oncologist, Regaud pioneer of radiobiology and Bouchacourt who pointed out individual radiosensitivity. Less than two months after the X-rays discovery by Roentgen, he produced one of the first French radiographic views that were at the origin of our current knowledge in bone and cartilage anatomy and traumatology...
April 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28369306/surgical-management-of-penetrating-thoracic-injuries-during-the-paris-attacks-on-13-november-2015
#10
Guillaume Boddaert, Pierre Mordant, Françoise Le Pimpec-Barthes, Emmanuel Martinod, Sonia Aguir, Pascal Leprince, Mathieu Raux, Jean-Paul Couëtil, Antonio Fiore, Thomas Lescot, Brice Malgras, François Pons, Yves Castier
OBJECTIVES: The Paris terrorist attacks on 13 November 2015 caused 482 casualties, including 130 deaths and 352 wounded. Facing these multisite terrorist attacks, Parisian public and military hospitals simultaneously managed numerous patients with penetrating thoracic injuries. The aim of this study was to analyse this cohort, the injury patterns, and assess the results of this mobilization. METHODS: The clinical records of all patients admitted to Parisian public and military hospitals with a penetrating thoracic injury related to the Paris 13 November terrorist attacks were reviewed...
June 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28345064/pneumocephalus-in-a-patient-with-multiple-stab-wounds
#11
Yusuf Savran, Volkan Karacam, Basak Bayram, Erdem Yaka, Nuri Karabay
Pneumocephalus is a complication of trauma to the chest and many iatrogenic interventions. It may arise due to systemic air embolism or retrograde cerebral venous air embolism which is an extremely rare complication. We report a 26-years-old female patient who presented to the Emergency Department suffering of multiple stab wounds. She was in a state of shock and after first aid and evaluation she was operated successfully. In the early postoperative period generalized tonic clonic convulsions were observed following cardiopulmonary resuscitation due to sudden cardiovascular collapse...
March 2017: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28298944/4-point-ultrasonography-to-confirm-the-correct-position-of-the-nasogastric-tube-in-114-critically-ill-patients
#12
Marianna Zatelli, Norberto Vezzali
PURPOSE: Nasogastric feeding tube is routinely positioned in intensive care units. The complications of misplacement are rare but very dangerous for the patients. The aim of this study is to estimate the diagnostic accuracy of this new technique, 4-point ultrasonography to confirm nasogastric tube placement in intensive care. METHODS: One hundred fourteen critical ill patients monitored in ICU were included. The intensivist provided in real time to perform the exam in four steps: sonography from either the right or left side of the patient's neck to visualize the esophagus, sonography of epigastrium to confirm the passage through the esophagogastric junction and the positioning in antrum, sonography of the fundus...
March 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28290239/an-innovative-design-for-cardiopulmonary-resuscitation-manikins-based-on-a-human-like-thorax-and-embedded-flow-sensors
#13
Mark Thielen, Rohan Joshi, Frank Delbressine, Sidarto Bambang Oetomo, Loe Feijs
Cardiopulmonary resuscitation manikins are used for training personnel in performing cardiopulmonary resuscitation. State-of-the-art cardiopulmonary resuscitation manikins are still anatomically and physiologically low-fidelity designs. The aim of this research was to design a manikin that offers high anatomical and physiological fidelity and has a cardiac and respiratory system along with integrated flow sensors to monitor cardiac output and air displacement in response to cardiopulmonary resuscitation. This manikin was designed in accordance with anatomical dimensions using a polyoxymethylene rib cage connected to a vertebral column from an anatomical female model...
March 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28267541/free-breathing-high-pitch-80kvp-dual-source-computed-tomography-of-the-pediatric-chest-image-quality-presence-of-motion-artifacts-and-radiation-dose
#14
Boris Bodelle, Constanze Fischbach, Christian Booz, Ibrahim Yel, Claudia Frellesen, Martin Beeres, Thomas J Vogl, Jan-Erik Scholtz
OBJECTIVES: To investigate image quality, presence of motion artifacts and effects on radiation dose of 80kVp high-pitch dual-source CT (DSCT) in combination with an advanced modeled iterative reconstruction algorithm (ADMIRE) of the pediatric chest compared to single-source CT (SSCT). MATERIALS AND METHODS: The study was approved by the institutional review board. Eighty-seven consecutive pediatric patients (mean age 9.1±4.9years) received either free-breathing high-pitch (pitch 3...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28263163/-mediastinal-abscesses-caused-by-a-fish-bone
#15
Rói Knudsen, Maria Quisgaard Gaunsbæk
A 72-year-old man presented with left-sided neck pain after eating fish. A flexible fiberolaryngoscopy showed no signs of fish bone or wounds. At the follow-up two days later the patient had developed fever. Direct laryngoscopy and oesophagoscopy revealed no abnormalities. A computed tomography of the neck and thorax showed subcutaneous emphysema and abscesses in the neck and mediastinum originating from the oesophagus. Treatment included incision of the neck, drainage tubes and broad-spectrum IV antibiotics...
March 6, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28168371/improvement-of-image-quality-and-dose-management-in-ct-fluoroscopy-by-iterative-3d-image-reconstruction
#16
Oliver S Grosser, Christian Wybranski, Dennis Kupitz, Maciej Powerski, Konrad Mohnike, Maciej Pech, Holger Amthauer, Jens Ricke
OBJECTIVES: The objective of this study was to assess the influence of an iterative CT reconstruction algorithm (IA), newly available for CT-fluoroscopy (CTF), on image noise, readers' confidence and effective dose compared to filtered back projection (FBP). METHODS: Data from 165 patients (FBP/IA = 82/74) with CTF in the thorax, abdomen and pelvis were included. Noise was analysed in a large-diameter vessel. The impact of reconstruction and variables (e.g. X-ray tube current I) influencing noise and effective dose were analysed by ANOVA and a pairwise t-test with Bonferroni-Holm correction...
February 6, 2017: European Radiology
https://www.readbyqxmd.com/read/28166840/app-based-serious-gaming-for-training-of-chest-tube-insertion-study-protocol-for-a-randomized-controlled-trial
#17
Mirco Friedrich, Christian Bergdolt, Patrick Haubruck, Thomas Bruckner, Karl-Friedrich Kowalewski, Beat Peter Müller-Stich, Michael C Tanner, Felix Nickel
BACKGROUND: Chest tube insertion is a standard intervention for management of various injuries of the thorax. Quick and accurate execution facilitates efficient therapy without further complications. Here, we propose a new training concept comprised of e-learning elements as well as continuous rating using an objective structured assessment of technical skills (OSATS) tool. The study protocol is presented for a randomized trial to evaluate e-learning with app-based serious gaming for chest drain insertion...
February 6, 2017: Trials
https://www.readbyqxmd.com/read/28047535/su-f-i-38-patient-organ-specific-dose-assessment-in-coronary-ct-angiograph-using-voxellaized-volume-dose-index-in-monte-carlo-simulation
#18
Mohammadi Gh Fallal, Alam N Riyahi, Gh Graily, R Paydar
PURPOSE: Clinical use of multi detector computed tomography(MDCT) in diagnosis of diseases due to high speed in data acquisition and high spatial resolution is significantly increased. Regarding to the high radiation dose in CT and necessity of patient specific radiation risk assessment, the adoption of new method in the calculation of organ dose is completely required and necessary. In this study by introducing a conversion factor, patient organ dose in thorax region based on CT image data using MC system was calculated...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047456/mo-de-207a-06-ecg-gated-ct-reconstruction-for-a-c-arm-inverse-geometry-x-ray-system
#19
J M Slagowski, Dap Dunkerley
PURPOSE: To obtain ECG-gated CT images from truncated projection data acquired with a C-arm based inverse geometry fluoroscopy system, for the purpose of cardiac chamber mapping in interventional procedures. METHODS: Scanning-beam digital x-ray (SBDX) is an inverse geometry fluoroscopy system with a scanned multisource x-ray tube and a photon-counting detector mounted to a C-arm. In the proposed method, SBDX short-scan rotational acquisition is performed followed by inverse geometry CT (IGCT) reconstruction and segmentation of contrast-enhanced objects...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046513/tu-h-207a-06-the-effects-of-various-ct-tube-current-modulation-tcm-schemes-on-dose-do-you-really-know-what-your-tcm-scheme-is-doing
#20
K Singhrao, M Bostani, A Hardy, C Cagnon, M McNitt-Gray
PURPOSE: To compare the effects of various tube current modulation (TCM) schemes - including attenuation-based, "organ-based" and combined schemes - on both the resulting tube current values as well as dose savings. METHODS: An anthropomorphic adult thorax phantom was scanned using a Multidetector row CT scanner that offered both attenuation-based and "organ-based" TCM schemes that could be used separately or in combination (Definition AS64, Siemens Healthcare)...
June 2016: Medical Physics
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