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https://www.readbyqxmd.com/read/29243077/pulmonary-embolus-as-cause-of-death-in-an-adolescent-demonstration-on-postmortem-ct
#1
Mary P Harty, H Theodore Harcke, Sharon W Gould, Adrienne Sukula-Perlman
Computed tomography (CT) is widely accepted in adult forensic death investigations (determination of cause and manner of death) but is only beginning to play a larger role in the cause of death determination in infants and children. We present a case of an adolescent with nephrotic syndrome who sustained cardiac arrest and died in the emergency department. A postmortem CT was requested by the state Office of the Medical Examiner as part of the medicolegal death investigation. Postmortem CT showed a saddle pulmonary embolus that was confirmed on conventional autopsy, demonstrating a natural manner of death...
December 14, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29243072/volume-based-glucose-metabolic-analysis-of-fdg-pet-ct-the-optimum-threshold-and-conditions-to-suppress-physiological-myocardial-uptake
#2
Osamu Manabe, Markus Kroenke, Tadao Aikawa, Atsuto Murayama, Masanao Naya, Atsuro Masuda, Noriko Oyama-Manabe, Kenji Hirata, Shiro Watanabe, Tohru Shiga, Chietsugu Katoh, Nagara Tamaki
OBJECTIVE: FDG PET/CT plays a significant role in the diagnosis of inflammatory heart diseases and cardiac tumors. We attempted to determine the optimal FDG uptake threshold for volume-based analyses and to evaluate the relationship between the myocardial physiological uptake volume in FDG PET and several clinical factors. METHODS: A total of 190 patients were retrospectively analyzed. The cardiac metabolic volume (CMV) was defined as a volume within the boundary determined by a threshold (SUVmean of blood pool × 1...
December 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29242134/non-contrast-estimation-of-diffuse-myocardial-fibrosis-with-dual-energy-ct-a-phantom-study
#3
Vidhya Kumar, Kevin E McElhanon, James K Min, Xin He, Zhaobin Xu, Eric X Beck, Orlando P Simonetti, Noah Weisleder, Subha V Raman
BACKGROUND: Estimation of diffuse myocardial fibrosis, substrate for adverse events such as heart failure and arrhythmias in patients with various cardiac disorders, is presently done by histopathology or cardiac magnetic resonance. We sought to develop a non-contrast method to estimate the amount of diffuse myocardial fibrosis leveraging dual energy computed tomography (DECT) in phantoms and a suitable small animal model. METHODS AND RESULTS: Phantoms consisted of homogenized bovine myocardium with varying amounts of Type 1 collagen...
December 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29240557/impact-of-motion-compensation-and-partial-volume-correction-for-18f-naf-pet-ct-imaging-of-coronary-plaque
#4
J Cal-González, C Tsoumpas, M L Lassen, S Rasul, L Koller, M Hacker, K Schäfers, T Beyer
Recent studies have suggested that 18F-NaF-PET enables visualization and quantification of plaque micro-calcification in the coronary tree. However, PET imaging of plaque calcification in the coronary arteries is challenging because of the respiratory and cardiac motion as well as partial volume effects. The objective of this work is to implement an image reconstruction framework, which incorporates compensation for respiratory as well as cardiac motion (MoCo) and partial volume correction (PVC), for cardiac 18F-NaF PET imaging in PET/CT...
December 14, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29239297/dynamic-flow-imaging-using-320-detector-row-ct-and-motion-coherence-analysis-in-coronary-aneurysms-associated-with-kawasaki-disease
#5
Yamato Shimomiya, Michinobu Nagao, Yuzo Yamasaki, Takashi Shirasaka, Masatoshi Kondo, Tsukasa Kojima, Akihiro Nishie, Kenichiro Yamamura, Hiroshi Honda
Introduction We propose a new dynamic flow imaging using 320-detector row CT, and investigate the assessment of coronary flow in aneurysms of Kawasaki disease in adulthood. METHODS: Six patients with Kawasaki disease and coronary aneurysms associated (26.7 years old) and six controls were enrolled. Dynamic coronary CT angiography with 320-row CT was continuously performed at mid-diastole throughout 15-25 cardiac cycles with prospective Electrocardiogram gating after injection of contrast media...
December 14, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/29239051/coronary-and-carotid-atherosclerosis-in-asymptomatic-male-marathon-runners
#6
Christof Burgstahler, Hans Cipowicz, Christoph Thomas, Christoph Schabel, Stefanie Mangold, Dominik Ketelsen, Claus D Claussen, Andreas M Niess, Ilias Tsiflikas
The aim of the study was to evaluate the diagnostic accuracy of carotid ultrasound (CU) to predict coronary atherosclerosis in asymptomatic male marathon runners. A total of 49 male marathon runners older than 45 years(mean age 53.3±7.2 years, range 45-74 years) received CU and cardiac CT angiography(CTA) including calcium scoring(CS). Results of CU and CTA were classified binary: 1. Absence of atherosclerosis and 2. presence of atherosclerosis. The extend of atherosclerosis was not primary end-point of the study...
December 14, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29237046/exposure-to-contrast-media-in-the-perioperative-period-confers-no-additional-risk-of-acute-kidney-injury-in-surgical-patients
#7
Ian Zealley, Huan Wang, Peter T Donnan, Samira Bell
Background: Iodinated contrast media (CM) used in angiography and computed tomography (CT) scans is an important cause of acute kidney injury (AKI) in hospitalized patients undergoing surgery. Contrast-induced nephropathy leads to AKI soon after CM administration. The aim of the study was to determine whether the timing of contrast media exposure related to diagnostic imaging during the immediate perioperative period influences the risk of post-operative AKI. Methods: All patients aged 18 years or above who underwent diagnostic imaging within 7 days of non-cardiac surgery between 1 January 2003 and 31 December 2013 in the Tayside region of Scotland, UK were included in the analysis...
December 9, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29236953/applications-of-cardiac-computed-tomography-in-electrophysiology-intervention
#8
S Liddy, U Buckley, H K Kok, B Loo, B Glover, G R Dhillon, O Buckley
Cardiac electrophysiology is an evolving specialty that has seen rapid advances in recent years. Concurrently, there has been much progress in the field of cardiac imaging. Electrophysiologists are increasingly requesting cross-sectional imaging in advance of many procedures. Pulmonary vein isolation and left atrial appendage (LAA) occlusion are now an established treatment options for atrial fibrillation. In patients undergoing pulmonary vein isolation, applications of computed tomography (CT) include evaluating the left atrial and pulmonary venous anatomy, excluding LAA thrombus and assessing for pulmonary vein stenosis...
December 9, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29234608/location-of-ruptured-bullae-in-secondary-spontaneous-pneumothorax
#9
Jinseok Choi, Hyo Yeong Ahn, Yeong Dae Kim, Hoseok, Jeong Su Cho, Jonggeun Lee
Background: The surgical treatment of secondary spontaneous pneumothorax (SSP) can be complicated by fragile lung parenchyma. The preoperative prediction of air leakage could help prevent intraoperative lung injury during manipulation of the lung. Common sites of bulla development and ruptured bullae were investigated based on computed tomography (CT) and intraoperative findings. Methods: The study enrolled 208 patients with SSP who underwent air leak control through video-assisted thoracoscopic surgery (VATS)...
December 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29233634/epicardial-adipose-tissue-density-and-volume-are-related-to-subclinical-atherosclerosis-inflammation-and-major-adverse-cardiac-events-in-asymptomatic-subjects
#10
Markus Goeller, Stephan Achenbach, Mohamed Marwan, Mhairi K Doris, Sebastien Cadet, Frederic Commandeur, Xi Chen, Piotr J Slomka, Heidi Gransar, J Jane Cao, Nathan D Wong, Moritz H Albrecht, Alan Rozanski, Balaji K Tamarappoo, Daniel S Berman, Damini Dey
BACKGROUND: We investigated whether epicardial adipose tissue (EAT) volume and density are related to early atherosclerosis, plaque inflammation and major adverse cardiac events (MACE, cardiac death and myocardial infarction) in asymptomatic subjects. METHODS: EAT volume and density were quantified from non-contrast cardiac CT in 456 asymptomatic individuals (age 60.3 ± 8.3; 68% with CCS>0) from the prospective EISNER trial. EAT volume and density were examined in relation to coronary calcium score (CCS), inflammatory biomarkers and MACE...
November 24, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29233632/rationale-and-design-of-the-worldwide-prospective-multicenter-registry-on-radiation-dose-estimates-of-cardiac-ct-angiography-in-daily-practice-in-2017-protection-vi
#11
Thomas J Stocker, Simon Deseive, Marcus Chen, Jonathon Leipsic, Martin Hadamitzky, Ronen Rubinshtein, Erik L Grove, Xiang-Ming Fang, John Lesser, Pál Maurovich-Horvat, Hugo Marques, Daniele Andreini, Ramzi Tabbalat, Joon-Won Kang, Joachim Eckert, Patricia Dickson, Signe H Forsdahl, Jess Lambrechtsen, Roberto C Cury, Jörg Hausleiter
BACKGROUND: Cardiac computed tomography angiography (cardiac CTA) is an increasingly used versatile imaging method to evaluate coronary and cardiac morphology. Owing to improvements in technology, image quality has continuously improved over the last 10-20 years. At the same time, numerous non-randomized and randomized studies have been performed to reduce the associated radiation exposure. Currently, it is unclear if the advances in technology and knowledge about radiation reduction translated into reduced levels of cardiac CTA radiation dose in daily clinical practice as well as a wide utilization of dose-saving strategies...
December 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29233231/coronary-sinus-ostial-atresia-with-persistent-left-superior-caval-vein-in-a-patient-with-congenitally-corrected-transposition-of-the-great-arteries
#12
Yuchen Zhang, Hugo V Alberdi, Elsie T Nguyen
We present a case of a 57-year-old man with congenitally corrected transposition of great vessels who was found to have coronary ostial atresia with cranial flow through left superior vena cava on CT with contrast injection in coronary tributaries. As such, he was ineligible for cardiac resynchronization therapy.
December 13, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/29231290/cardiovascular-magnetic-resonance-imaging-and-clinical-performance-of-somatostatin-receptor-positron-emission-tomography-in-cardiac-sarcoidosis
#13
Carmen Pizarro, Folke Kluenker, Darius Dabir, Daniel Thomas, Florian C Gaertner, Markus Essler, Christian Grohé, Georg Nickenig, Dirk Skowasch
AIMS: Cardiac affection constitutes a major limiting condition in systemic sarcoidosis. The primary objective of this study was to investigate the persistence rate of cardiac sarcoid involvement by cardiovascular magnetic resonance (CMR) imaging in patients diagnosed with cardiac sarcoidosis (CS). Moreover, we examined the additional insights into myocardial damage's characteristics gained by somatostatin receptor scintigraphy. METHODS AND RESULTS: In a pilot study, we had previously identified cardiac involvement-diagnosed by CMR imaging-to be present in 29 of 188 patients (15...
December 12, 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/29231013/-diagnostic-value-of-postmortem-ct-angiography-in-coronary-atherosclerosis
#14
H Qian, Y Shao, Z D Li, D H Zou, Z Q Qin, L Wan, Y J Chen
OBJECTIVES: To explore the application value of postmortem computed tomography (CT) angiography on diagnosis of coronary atherosclerotic stenosis degree. METHODS: Based on the previous experimental results, the postmortem CT angiography device of human isolated heart was improved. Different coronary atherosclerotic stenosis degree of sudden death cases was selected. Before the cardiac anatomy, hearts were removed out completely and CT angiography was performed immediately...
April 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29226377/two-and-three-dimensional-transthoracic-echocardiographic-assessment-of-superior-vena-cava-crista-terminalis-and-right-atrial-appendage-using-the-right-parasternal-approach
#15
Mohammed J Arisha, Ming C Hsiung, Navin C Nanda, Ankur Gupta, David C George, Ahmed Elkaryoni, Kirolos Barssoum, Ahmed H Mohamed, Swetha Srialluri
BACKGROUND: The noninvasive assessment of superior vena cava (SVC), crista terminalis (CT), and the right atrial appendage (RAA) has clinical implications in determining the right atrium (RA) pressure in adult patients in whom the inferior vena cava cannot be imaged, in planning electrophysiological procedures and for evaluation of thrombi in RA/RAA. It is difficult to image these structures using standard two-dimensional transthoracic echocardiography (2DTTE), but the right parasternal approach has shown promise in the very few studies published so far...
December 11, 2017: Echocardiography
https://www.readbyqxmd.com/read/29225032/calcification-of-thoracic-and-abdominal-aneurysms-is-associated-with-mortality-and-morbidity
#16
Mohammed M Chowdhury, Lukasz P Zieliński, James J Sun, Simon Lambracos, Jonathan R Boyle, Seamus C Harrison, James H F Rudd, Patrick A Coughlin
INTRODUCTION: Cardiovascular events are common in people with aortic aneurysms. Arterial calcification is a recognised predictor of cardiovascular outcomes in coronary artery disease. Whether calcification within abdominal and thoracic aneurysm walls is correlated with poor cardiovascular outcomes is not known. PATIENTS AND METHODS: Calcium scores were derived from computed tomography (CT) scans of consecutive patients with either infrarenal (AAA) or descending thoracic aneurysms (TAA) using the modified Agatston score...
December 7, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29222954/evaluation-of-motion-artifact-metrics-for-coronary-ct-angiography
#17
Hongfeng Ma, Eric Gros, Aniko Szabo, Scott G Baginski, Zachary R Laste, Naveen M Kulkarni, Darin Okerlund, Taly G Schmidt
PURPOSE: This study quantified the performance of coronary artery motion artifact metrics relative to human observer ratings. Motion artifact metrics have been used as part of motion correction and best-phase selection algorithms for Coronary Computed Tomography Angiography (CCTA). However, the lack of ground truth makes it difficult to validate how well the metrics quantify the level of motion artifact. This study investigated five motion artifact metrics, including two novel metrics, using a dynamic phantom, clinical CCTA images, and an observer study that provided ground truth motion artifact scores from a series of pairwise comparisons...
December 9, 2017: Medical Physics
https://www.readbyqxmd.com/read/29222738/ct-based-3d-printing-is-superior-to-transesophageal-echocardiography-for-pre-procedure-planning-in-left-atrial-appendage-device-closure
#18
Edinrin Obasare, Sumeet K Mainigi, D Lynn Morris, Leandro Slipczuk, Igor Goykhman, Evan Friend, Mary Rodriguez Ziccardi, Gregg S Pressman
Accurate assessment of the left atrial appendage (LAA) is important for pre-procedure planning when utilizing device closure for stroke reduction. Sizing is traditionally done with transesophageal echocardiography (TEE) but this is not always precise. Three-dimensional (3D) printing of the LAA may be more accurate. 24 patients underwent Watchman device (WD) implantation (71 ± 11 years, 42% female). All had complete 2-dimensional TEE. Fourteen also had cardiac computed tomography (CCT) with 3D printing to produce a latex model of the LAA for pre-procedure planning...
December 8, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29220755/coronary-artery-calcification-predicts-cardiovascular-complications-after-sepsis
#19
Vedant A Gupta, Matthew Sousa, Nathan Kraitman, Rahul Annabathula, Olga Vsevolozhskaya, Steve W Leung, Vincent L Sorrell
PURPOSE: Sepsis is a highly prevalent and fatal condition, with reported cardiovascular event rates as high as 25-30% at 1year. Risk stratification in septic patients has been extremely limited. MATERIAL AND METHODS: 267 septic patients with detectable troponin levels, APACHE II scores, and CT scans of the chest or abdomen were assessed. Patients with a recent cardiac intervention were excluded. Coronary artery calcification (CAC) was identified as present or absent on body CT scans...
December 2, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29220208/changing-utilization-of-noninvasive-diagnostic-imaging-over-2-decades-an-examination-family-focused-analysis-of-medicare-claims-using-the-neiman-imaging-types-of-service-categorization-system
#20
David A Rosman, Richard Duszak, Wenyi Wang, Danny R Hughes, Andrew B Rosenkrantz
OBJECTIVE: The objective of our study was to use a new modality and body region categorization system to assess changing utilization of noninvasive diagnostic imaging in the Medicare fee-for-service population over a recent 20-year period (1994-2013). MATERIALS AND METHODS: All Medicare Part B Physician Fee Schedule services billed between 1994 and 2013 were identified using Physician/Supplier Procedure Summary master files. Billed codes for diagnostic imaging were classified using the Neiman Imaging Types of Service (NITOS) coding system by both modality and body region...
December 8, 2017: AJR. American Journal of Roentgenology
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