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https://www.readbyqxmd.com/read/29226123/open-repair-of-a-12-cm-posttraumatic-aneurysm-of-right-subclavian-artery
#1
Konstantinos Tigkiropoulos, Omiros Chalvatzoulis, Eleftherios Chalvatzoulis, Kyriakos Stavridis, Dimitrios Karamanos, Ioannis Lazaridis, Andreas Efstathiou, Nikolaos Saratzis
Purpose: To present a rare case of a patient with a 12-cm posttraumatic right subclavian artery aneurysm successfully treated with aneurysmectomy and innominate-axillary bypass. Case report: A 54-year-old man presented to the emergency department due to progressive dyspnea and hoarseness of voice. His medical record was unremarkable except that he had right-sided pneumothorax and multiple rib fractures from a car accident 16 years ago. A chest X-ray showed a mass in the upper lobe of the right lung, and the patient was hospitalized for further investigation...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/29218226/hamman-s-syndrome-in-diabetic-ketoacidosis
#2
Alexandra Rose Pain, Josh Pomroy, Andrea Benjamin
Hamman's syndrome (spontaneous subcutaneous emphysema and pneumomediastinum) is a rare complication of diabetic ketoacidosis (DKA), with a multifactorial etiology. Awareness of this syndrome is important: it is likely underdiagnosed as the main symptom of shortness of breath is often attributed to Kussmaul's breathing and the findings on chest radiograph can be subtle and easily missed. It is also important to be aware of and consider Boerhaave's syndrome as a differential diagnosis, a more serious condition with a 40% mortality rate when diagnosis is delayed...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29179706/intralobar-pulmonary-sequestration-expanding-toward-the-contralateral-thorax-two-case-reports
#3
Hizuru Amano, Jun Fujishiro, Akinari Hinoki, Hiroo Uchida
BACKGROUND: Intralobar pulmonary sequestration (ILS) is defined as a portion of parenchyma that is contained within the normal pleural investment of the lung but not connected to the tracheobronchial tree, and supplied by anomalous systemic arteries. As ILS is enveloped within the lobe of the normal lung, it is extremely rare for ILS to invade into the mediastinum. We report two atypical cases of infants with ILS expanded toward the posterior mediastinum and contralateral thorax through the pulmonary ligament...
November 28, 2017: BMC Surgery
https://www.readbyqxmd.com/read/29178486/developing-and-characterizing-mr-ct-visible-materials-used-in-qa-phantoms-for-mrgrt-systems
#4
Angela Steinmann, R Jason Stafford, Gabriel Sawakuchi, Zhifei Wen, Laurence Court, Clifton D Fuller, David Followill
PURPOSE: Synthetic tissue equivalent (STE) materials currently used to simulate tumor and surrounding tissues for IROC-Houston's anthropomorphic head and thorax QA phantoms cannot be visualized using magnetic resonance (MR) imaging. The purpose of this study was to characterize dual MR/CT visible STE materials that can be used in an end-to-end QA phantom for MR guided radiotherapy (MRgRT) modalities. METHODS: Over 80 materials' MR, CT, and dosimetric STE properties were investigated for use in MRgRT QA phantoms...
November 27, 2017: Medical Physics
https://www.readbyqxmd.com/read/29145905/-a-girl-with-a-tumour-on-the-thorax
#5
M B Notenboom-Kool, W Opstelten
A healthy 1-year old girl visits her general practitioner with a solitary dome-shaped tumour on her thorax. The lesion is about one cm in diameter and is present since several months. Pathological research reveals a solitary giant molluscum contagiosum. This is a common viral disease of the childhood. In contrast to this case, mollusca contagiosa typically present as several small papules.
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28987652/dual-energy-computed-tomography-in-patients-with-cutaneous-malignant-melanoma-comparison-of-noise-optimized-and-traditional-virtual-monoenergetic-imaging
#6
Simon S Martin, Julian L Wichmann, Hendrik Weyer, Moritz H Albrecht, Tommaso D'Angelo, Doris Leithner, Lukas Lenga, Christian Booz, Jan-Erik Scholtz, Boris Bodelle, Thomas J Vogl, Renate Hammerstingl
OBJECTIVE: The aim of this study was to investigate the impact of noise-optimized virtual monoenergetic imaging (VMI+) reconstructions on quantitative and qualitative image parameters in patients with cutaneous malignant melanoma at thoracoabdominal dual-energy computed tomography (DECT). MATERIALS AND METHODS: Seventy-six patients (48 men; 66.6±13.8years) with metastatic cutaneous malignant melanoma underwent DECT of the thorax and abdomen. Images were post-processed with standard linear blending (M_0...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28941215/analysis-of-testing-with-multiple-choice-versus-open-ended-questions-outcome-based-observations-in-an-anatomy-course
#7
Cheryl A Melovitz Vasan, David O DeFouw, Bart K Holland, Nagaswami S Vasan
The pedagogical approach for both didactic and laboratory teaching of anatomy has changed in the last 25 years and continues to evolve; however, assessment of student anatomical knowledge has not changed despite the awareness of Bloom's taxonomy. For economic reasons most schools rely on multiple choice questions (MCQ) that test knowledge mastered while competences such as critical thinking and skill development are not typically assessed. In contrast, open-ended question (OEQ) examinations demand knowledge construction and a higher order of thinking, but more time is required from the faculty to score the constructed responses...
September 22, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28937491/improved-calcium-scoring-at-dual-energy-computed-tomography-angiography-using-a-high-z-contrast-element-and-novel-material-separation-technique
#8
Jack W Lambert, Yuxin Sun, Karen G Ordovas, Robert G Gould, Sizhe Wang, Benjamin M Yeh
OBJECTIVES: The aim of this study was to compare the accuracy of existing dual-energy computed tomography (CT) angiography coronary artery calcium scoring methods to those obtained using an experimental tungsten-based contrast material and a recently described contrast material extraction process (CMEP). METHODS: Phantom coronary arteries of varied diameters, with different densities and arcs of simulated calcified plaque, were sequentially filled with water, iodine, and tungsten contrast materials and scanned within a thorax phantom at rapid-kVp-switching dual-energy CT...
September 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28929810/dynamic-contrast-enhanced-perfusion-area-detector-ct-preliminary-comparison-of-diagnostic-performance-for-n-stage-assessment-with-fdg-pet-ct-in-non-small-cell-lung-cancer
#9
COMPARATIVE STUDY
Yoshiharu Ohno, Yasuko Fujisawa, Naoki Sugihara, Yuji Kishida, Shinichiro Seki, Hisanobu Koyama, Takeshi Yoshikawa
OBJECTIVE: The objective of our study was to directly compare the capability of dynamic first-pass contrast-enhanced (CE) perfusion area-detector CT (ADCT) and FDG PET/CT for differentiation of metastatic from nonmetastatic lymph nodes and assessment of N stage in patients with non-small cell lung carcinoma (NSCLC). SUBJECTS AND METHODS: Seventy-seven consecutive patients, 45 men (mean age ± SD, 70.4 ± 5.9 years) and 32 women (71.2 ± 7.7 years), underwent dynamic first-pass CE-perfusion ADCT at two or three different positions for covering the entire thorax, FDG PET/CT, surgical treatment, and pathologic examination...
November 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28901616/regularization-of-nonlinear-decomposition-of-spectral-x-ray-projection-images
#10
Nicolas Ducros, Juan Felipe Perez-Juste Abascal, Bruno Sixou, Simon Rit, Françoise Peyrin
PURPOSE: Exploiting the x-ray measurements obtained in different energy bins, spectral computed tomography (CT) has the ability to recover the 3-D description of a patient in a material basis. This may be achieved solving two subproblems, namely the material decomposition and the tomographic reconstruction problems. In this work, we address the material decomposition of spectral x-ray projection images, which is a nonlinear ill-posed problem. METHODS: Our main contribution is to introduce a material-dependent spatial regularization in the projection domain...
September 2017: Medical Physics
https://www.readbyqxmd.com/read/28802566/alcohol-use-and-cardiovascular-disease-risk-in-patients-with-nonalcoholic-fatty-liver-disease
#11
Lisa B VanWagner, Hongyan Ning, Norrina B Allen, Veeral Ajmera, Cora E Lewis, John Jeffrey Carr, Donald M Lloyd-Jones, Norah A Terrault, Juned Siddique
BACKGROUND & AIMS: Cardiovascular disease (CVD) is the leading cause of death among patients with nonalcoholic fatty liver disease (NAFLD). Moderate drinking (vs abstinence) is associated with lower risk of CVD in the general population. We assessed whether alcohol use is associated with CVD risk in patients with NAFLD. METHODS: We analyzed data from participants in the Coronary Artery Risk Development in Young Adults longitudinal cohort study of 5115 black and white young adults, 18-30 years old, recruited from 4 cities in the United States from 1985 through 1986...
November 2017: Gastroenterology
https://www.readbyqxmd.com/read/28777164/mr-imaging-of-mediastinal-masses
#12
REVIEW
Brett W Carter, Sonia L Betancourt, Marcelo F Benveniste
The mediastinum contains vital vascular and nonvascular structures and organs, and a wide variety of abnormalities may arise from this region of the thorax. Although mediastinal masses may be initially detected on chest radiography, cross-sectional imaging plays an important role in the identification and evaluation of mediastinal lesions, enabling the formulation of focused differential diagnoses and ultimately guiding management. Computed tomography (CT) is considered the imaging modality of choice for evaluating most mediastinal masses; however, the role of magnetic resonance (MR) imaging continues to expand, as it is superior to CT in differentiating between cystic and solid masses, identifying cystic and solid components within complex lesions, and distinguishing thymic hyperplasia and normal thymus from thymic epithelial neoplasms and other neoplasms...
August 2017: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/28747938/computed-tomography-angiography-for-imaging-results-of-neochordal-mitral-valve-repair
#13
Radosław Zwoliński, Anna Marcinkiewicz, Konrad Szymczyk, Jarosław Drożdż, Ryszard Jaszewski, Bogdan Jegier
INTRODUCTION: Degenerative mitral regurgitation is currently the most frequent indication for mitral valve repair. AIM: To visualize and assess the mid-term results of mitral valve repair with neochordae implantation, using computed tomography angiography (CTA) imaging. MATERIAL AND METHODS: The CTA with ECG gating and without modulation was applied in 10 patients to assess the results of a mitral valve sparing procedure. The results of 3 patients are presented...
June 2017: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/28730151/comparison-of-thoracic-radiography-and-computed-tomography-in-calves-with-naturally-occurring-respiratory-disease
#14
Jennifer Fowler, Susanne M Stieger-Vanegas, Jorge A Vanegas, Gerd Bobe, Keith P Poulsen
OBJECTIVE: To evaluate the severity and extent of lung disease using thoracic computed radiography (CR) compared to contrast-enhanced multi-detector computed tomography (MDCT) of the thorax in calves with naturally occurring respiratory disease and to evaluate the feasibility and safety of performing contrast-enhanced thoracic multi-detector MDCT examinations in sedated calves. Furthermore, to evaluate if combining CR or MDCT with respiratory scoring factors will improve prediction of the chronicity of pulmonary disease in calves...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28687285/a-jafroc-study-of-nodule-detection-performance-in-ct-images-of-a-thorax-acquired-during-pet-ct
#15
J D Thompson, A Wareing, K R Szczepura, S Vinjamuri, P Hogg
PURPOSE: Two types of CT images (modalities) are acquired in PET/CT: for attenuation correction (AC) and diagnosis. The purpose of the study was to compare nodule detection and localization performance between these two modalities. METHODS: CT images, using both modalities, of an anthropomorphic chest phantom containing zero or more simulated spherical nodules of 5, 8, 10 and 12 mm diameters and contrasts -800, -630 and 100 HU were acquired. An observer performance study using nine observers interpreting 45 normal (zero nodules) images and 47 abnormal images (1-3 nodules; average 1...
August 2017: Radiography
https://www.readbyqxmd.com/read/28668419/dose-reduction-techniques-in-coronary-calcium-scoring-the-effect-of-iterative-reconstruction-combined-with-low-tube-voltage-on-calcium-scores-in-a-thoracic-phantom
#16
Marleen Vonder, Gert Jan Pelgrim, Mathias Meyer, Thomas Henzler, Matthijs Oudkerk, Rozemarijn Vliegenthart
OBJECTIVES: To define a dose-reduced coronary calcium CT protocol that provides similar calcium score values as a conventional 120kVp protocol. METHODS: A thorax phantom containing 100 calcifications was scanned with the reference protocol (120kVp, 90 ref mAs, FBP) and 30 dose-reduced protocols (70-110kVp, 90 ref mAs, FBP and iterative reconstruction (IR) levels 1-5) with 3rd generation dual-source CT. For protocols that yielded similar detectability and calcium scores as the reference protocol, additional scans were acquired at reduced ref mAs...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28658505/fast-kvp-switching-dual-energy-contrast-enhanced-thorax-and-cardiac-ct-a-phantom-study-on-the-accuracy-of-iodine-concentration-and-effective-atomic-number-measurement
#17
Antonios E Papadakis, John Damilakis
PURPOSE: To assess the effect of vessel diameter and exposure parameters on the estimation accuracy of concentration and effective atomic number (Zeff ) of iodine (I) in contrast-enhanced thorax and cardiac dual-energy CT using a modern fast kVp-switching CT scanner. METHODS: A standard semi-anthropomorphic cardiac CT phantom devised to simulate the human chest at three different body habitus i.e., medium-sized, large-sized, and obese, was scanned using a fast kVp-switching Revolution-GSI GE CT scanner...
June 28, 2017: Medical Physics
https://www.readbyqxmd.com/read/28623748/occupant-thorax-response-variations-due-to-arm-position-and-restraint-systems-in-side-impact-crash-scenarios
#18
Donata Gierczycka, Duane S Cronin
Recent epidemiological studies have identified that thoracic side airbags may vary in efficacy to reduce injury severity in side impact crash scenarios, while previous experimental and epidemiological studies have presented contrasting results. This study aimed to quantify the variations in occupant response in side impact conditions using a human body computational model integrated with a full vehicle model. The model was analyzed for a Moving Deformable Barrier side impact at 61km/h to assess two pre-crash arm positions, the incorporation of a seatbelt, and a thorax air bag on thorax response...
June 13, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28615080/locomotor-circumvention-strategies-are-altered-by-stroke-ii-postural-coordination
#19
Anuja Darekar, Anouk Lamontagne, Joyce Fung
BACKGROUND: Locomotor strategies for obstacle circumvention require appropriate postural coordination that depends on sensorimotor integration within the central nervous system. It is not known how these strategies are affected by a stroke. The objective of this study was to contrast postural coordination strategies used for obstacle circumvention between post-stroke participants (n = 12) and healthy controls (n = 12). METHODS: Participants walked towards a target in a virtual environment (11 × 8 m room) with cylindrical obstacles that were stationary or approaching from head-on, or diagonally 30° left/right...
June 15, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28615044/comparison-of-transportation-related-injury-mechanisms-and-outcome-of-young-road-users-and-adult-road-users-a-retrospective-analysis-on-24-373-patients-derived-from-the-traumaregister-dgu-%C3%A2
#20
MULTICENTER STUDY
Thomas Brockamp, Uli Schmucker, Rolf Lefering, Manuel Mutschler, Arne Driessen, Christian Probst, Bertil Bouillon, Paola Koenen
BACKGROUND: Most young people killed in road crashes are known as vulnerable road users. A combination of physical and developmental immaturity as well as inexperience increases the risk of road traffic accidents with a high injury severity rate. Understanding injury mechanism and pattern in a group of young road users may reduce morbidity and mortality. This study analyzes injury patterns and outcomes of young road users compared to adult road users. The comparison takes into account different transportation related injury mechanisms...
June 14, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
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