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Thorax contrast CT

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https://www.readbyqxmd.com/read/29742695/anterior-mediastinal-hodgkin-lymphoma-presenting-as-an-extremely-hypervascular-tumor-on-computed-tomography-a-case-report
#1
Soo Jeong Lee, Ji Young Rho, Gwang Il Kim, Joonsuk Park
RATIONALE: In the thorax, Hodgkin lymphoma (HL) most frequently involves the anterior mediastinal and paratracheal regions and tends to spread to contiguous nodal groups. Enlarged lymph nodes typically have homogeneous soft tissue attenuation similar to that of muscle tissue on computed tomography (CT). PATIENT CONCERNS: A contrast-enhanced CT examination of a 19-year-old man with right-sided chest pain showed an intense, heterogeneously enhancing mass with organization of serpentine and dilated blood vessels in the right anterior mediastinum that had invaded the upper lobe of the right lung...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29739328/a-novel-ultrafast-low-dose-computed-tomography-protocol-allows-concomitant-coronary-artery-evaluation-and-lung-cancer-screening
#2
Carlo Gaudio, Gennaro Petriello, Francesco Pelliccia, Alessandra Tanzilli, Alberto Bandiera, Gaetano Tanzilli, Francesco Barillà, Vincenzo Paravati, Massimo Pellegrini, Enrico Mangieri, Paolo Barillari
BACKGROUND: Cardiac computed tomography (CT) is often performed in patients who are at high risk for lung cancer in whom screening is currently recommended. We tested diagnostic ability and radiation exposure of a novel ultra-low-dose CT protocol that allows concomitant coronary artery evaluation and lung screening. METHODS: We studied 30 current or former heavy smoker subjects with suspected or known coronary artery disease who underwent CT assessment of both coronary arteries and thoracic area (Revolution CT, General Electric)...
May 8, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29688026/incidental-pulmonary-embolism-in-oncology-patients-with-current-macroscopic-malignancy-incidence-in-different-tumour-type-and-impact-of-delayed-treatment-on-survival-outcome
#3
Maung Maung Myat Moe, Sridhar Redla
OBJECTIVES: To evaluate the incidence and outcome of incidental PE (iPE) in patients with current macroscopic malignancy and delayed anticoagulation due to late reporting of CT scan. METHODS: Reports of CT thorax with iv contrast done on oncology patients between 01.01.15 and 31.12.15 in two district general hospitals in UK were reviewed. Electronic patient records of iPE patients were reviewed for demographic and treatment information. RESULTS: 26 iPEs were reported in 1,604 scans (731 patients), incidence 1...
April 24, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29679500/a-unified-material-decomposition-framework-for-quantitative-dual-and-triple-energy-ct-imaging
#4
Wei Zhao, Don Vernekohl, Fei Han, Bin Han, Hao Peng, Yong Yang, Lei Xing, James K Min
PURPOSE: Many clinical applications depend critically on the accurate differentiation and classi-fication of different types of materials in patient anatomy. This work introduces a unified framework for accurate nonlinear material decomposition and applies it, for the first time, in the concept of triple-energy CT (TECT) for enhanced material differentiation and classification as well as dual-energy CT METHODS: We express polychromatic projection into a linear combination of line integrals of material-selective images...
April 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29670801/nonoperative-management-of-multiple-penetrating-cardiac-and-colon-wounds-from-a-shotgun-a-case-report-and-literature-review
#5
Paula M Jaramillo, Jaime A Montoya, David A Mejia, Salin Pereira Warr
Introduction: Surgery for cardiac trauma is considered fatal and for wounds of the colon by associated sepsis is normally considered; however, conservative management of many traumatic lesions of different injured organs has progressed over the years. Presentation of the Case: A 65-year-old male patient presented with multiple shotgun wounds on the left upper limb, thorax, and abdomen. On evaluation, he was hemodynamically stable with normal sinus rhythm and normal blood pressure, no dyspnea, or abdominal pain...
2018: Case Reports in Surgery
https://www.readbyqxmd.com/read/29659090/detection-of-intra-cardiac-thrombi-and-congestive-heart-failure-in-cats-using-computed-tomographic-angiography
#6
Kyle P Vititoe, Ryan C Fries, Stephen Joslyn, Laura E Selmic, Mark Howes, Jordan P Vitt, Robert T O'Brien
Arterial thromboembolism is a life-threatening condition in cats most commonly secondary to cardiac disease. Echocardiography is the reference standard to evaluate for presence of a thrombus. In humans, computed tomographic (CT) angiography is becoming widely used to detect left atrial thrombi precluding the use of sedation. The purpose of this prospective, controlled, methods comparison pilot study was threefold: (1) describe new CT angiography protocol used in awake cats with cardiac disease and congestive heart failure; (2) determine accuracy of continuous and dynamic acquisition CT angiography to identify and characterize cardiac thrombi from spontaneous echocardiographic contrast using transthoracic echocardiography as our reference standard; (3) identify known negative prognostic factors and comorbidities of the thorax that CT angiography may provide that complement or supersede echocardiographic examination...
April 16, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29594348/study-of-a-seventeenth-century-french-artificial-mummy-autopsical-native-and-contrast-injected-ct-investigations
#7
Rozenn Colleter, Fabrice Dedouit, Sylvie Duchesne, Patrice Gérard, Laurent Dercle, Pierre Poilpré, Véronique Gendrot, Hervé Rousseau, Éric Crubézy, Norbert Telmon, Fatima-Zohra Mokrane
BACKGROUND: A lead coffin was fortuitously discovered in a church called "Eglise des Toussaints" in Rennes (French Brittany). A collaborative taskforce investigated this extraordinary discovery. A multi-disciplinary team of experts from the National Institute for Preventive Archeological Research (INRAP) and Rangueil University Hospital of Toulouse was created, including anthropologists, archeologists, forensic pathologists, radiologists, and pathologists. The inscription on the lead coffin specified that the body belonged to "Messer Louys de Bruslon, Lord of Plessis," a nobleman who died on November 1, 1661...
March 28, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29489868/quantification-of-abdominal-aortic-calcification-inherent-measurement-errors-in-current-computed-tomography-imaging
#8
Ruben V C Buijs, Eva L Leemans, Marcel Greuter, Ignace F J Tielliu, Clark J Zeebregts, Tineke P Willems
OBJECTIVE: Quantification software for coronary calcification is often used to measure abdominal aortic calcification on computed tomography (CT) images. However, there is no evidence substantiating the reliability and accuracy of these tools in this setting. Differences in coronary and abdominal CT acquisition and presence of intravascular contrast may affect the results of these tools. Therefore, this study investigates the effects of CT acquisition parameters and iodine contrast on automated quantification of aortic calcium on CT...
2018: PloS One
https://www.readbyqxmd.com/read/29455309/right-heart-failure-caused-by-direct-pressure-of-distal-arch-aneurysm
#9
Hironobu Sugiyama, Ryo Tohma, Takuya Misato, Kazuma Okamoto, Taro Hayashi, Satoshi Tobe, Tatsuro Matsuo, Kotaro Tsunemi, Takanori Oka, Nobuhiro Tanimura
We report a rare case of right heart failure caused by distal aortic aneurysm. Although aortopulmonary fistula is a common complication of giant aortic arch aneurysm, right heart failure caused by mechanical pressure by aneurysm is very rare. A 79-year-old female patient presented dyspnea. Contrast computed tomography (CT) of the thorax delineated a 78 mm aortic arch aneurysm pressing the main to left pulmonary artery and a 40 mm pericardial effusion at maximum depth at posterior side. Echocardiography showed the acceleration flow from main to left pulmonary artery and moderate pulmonary hypertension...
February 17, 2018: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29383525/contrast-enhanced-cadaver-specific-computed-tomography-in-gross-anatomy-teaching
#10
Daniel Paech, Kerstin Klopries, Sara Doll, Ralph Nawrotzki, Heinz-Peter Schlemmer, Frederik L Giesel, Thomas Kuner
OBJECTIVES: To establish contrast-enhanced (CE) cadaver-specific post-mortem computed tomography (PMCT) in first-year gross anatomy teaching and quantitatively evaluate its learning benefit. METHODS: 132 first-year medical students were included in this IRB-approved study and randomly assigned to an intervention group (n=59) provided with continuous access to CE and non-enhanced (NE) cadaver-specific PMCT-scans during the first-semester gross anatomy course, and a control group (n=73) that had only NE cadaver-specific PMCT data available...
January 30, 2018: European Radiology
https://www.readbyqxmd.com/read/29371406/a-prospective-study-of-quantitative-spect-ct-for-evaluation-of-hepatopulmonary-shunt-fraction-prior-to-sirt-of-liver-tumors
#11
Helmut J M H Dittmann, Daniel Kopp, Juergen Kupferschlaeger, Diana Feil, Gerd Groezinger, Roland Syha, Matthias Weissinger, Christian La Fougère
Hepatopulmonary shunt fraction (LSF)-estimation using Tc-99m-Macroalbumine (MAA) imaging is performed prior to selective internal radiotherapy (SIRT) of the liver in order to reduce risk of pulmonary irradiation burden. Generally, planar scans are acquired after injection of MAA into the hepatic artery. However, validity of this approach is limited by different attenuation of liver and lung tissue as well as inaccurate segmentation of the organs. Aim of this study was to evaluate quantitative SPECT/CT for LSF-assessment in a prospective clinical cohort...
January 25, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29350048/triple-split-bolus-versus-single-bolus-ct-in-abdominal-trauma-patients-a-comparative-study
#12
Johannes Clemens Godt, Torsten Eken, Anselm Schulz, Cathrine K Johansen, Anette Aarsnes, Johann Baptist Dormagen
Background Split-bolus computed tomography (CT) is a recent development in trauma imaging. Instead of multiple scans in different contrast phases after a single contrast bolus, split-bolus protocols consist of one single scan of the thorax and abdomen after two or three contrast injections at different points of time. Purpose To evaluate and compare image quality and injury findings of a new triple-split-bolus CT (TS-CT) protocol of thorax and abdomen with those of a portal venous phase CT (PV-CT) in the same patient group...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29226123/open-repair-of-a-12-cm-posttraumatic-aneurysm-of-right-subclavian-artery
#13
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
#14
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
#15
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
#16
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...
February 2018: Medical Physics
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
#17
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
#18
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
#19
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/28777164/mr-imaging-of-mediastinal-masses
#20
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
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