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Ct angiography

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https://www.readbyqxmd.com/read/28644100/influence-of-smoking-on-aneurysm-recurrence-after-endovascular-treatment-of-cerebrovascular-aneurysms
#1
John Futchko, Jordan Starr, Darryl Lau, Matthew R Leach, Christopher Roark, Aditya S Pandey, B Gregory Thompson
OBJECTIVE Smoking is a known risk factor for aneurysm development and aneurysmal subarachnoid hemorrhage, as well as subsequent vasospasm in both untreated individuals and patients who have undergone surgical clipping of cerebrovascular aneurysms. However, there is a lack of data in the current scientific literature about the long-term effects that smoking has on the integrity of endovascular repairs of cerebral aneurysms. This study was designed to determine if any smoking history increased the risk of poorer outcomes and/or aneurysm recurrence in patients who have had endovascular repair of cerebral aneurysms...
June 23, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28641503/embolization-of-a-large-progressive-symptomatic-desmoid-tumor-in-the-rectus-muscle-of-a-female-patient-with-multiple-sclerosis-a-case-report
#2
I Diebels, M Blockhuys, P Willemsen, Y Pirenne
INTRODUCTION: Desmoid tumors are benign tumors, yet can lead to significant morbidity due to aggressive local expansions. Treatment starts with a wait-and-see policy, however, more aggressive treatments like broad margin resection surgery might be necessary in case of tumor progression. PATIENTS AND METHODS: We report the case of a 26-year-old female with a symptomatic desmoid tumor in the left rectus muscle. The initial wait-and-see policy led to an increase in tumor size and progression of symptoms...
June 22, 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28639400/motion-estimation-for-cardiac-functional-analysis-using-two-x-ray-computed-tomography-scans
#3
George S K Fung, Luisa Ciuffo, Hiroshi Ashikaga, Katsuyuki Taguchi
PURPOSE: This work concerns computed tomography (CT)-based cardiac functional analysis (CFA) with a reduced radiation dose. As CT-CFA requires images over the entire heartbeat, the scans are often performed at 10-20% of the tube current settings that are typically used for coronary CT angiography. A large image noise then degrades the accuracy of motion estimation. Moreover, even if the scan was performed during the sinus rhythm, the cardiac motion observed in CT images may not be cyclic with patients with atrial fibrillation...
June 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28637997/positional-relationships-of-abdominal-aortic-branches-for-contrast-radiography-of-the-inferior-mesenteric-artery-using-the-coeliac-trunk-and-superior-mesenteric-artery-as-landmarks
#4
Yusuke Nakayama, Shogo Hayashi, Kyoko Takeuchi, Shinichi Kawata, Ning Qu, Masahiro Itoh
PURPOSE: To establish a method by which angiography of the inferior mesenteric artery (IMA) can be performed smoothly, we investigated the relative locations of the coeliac trunk (CT), superior mesenteric artery (SMA), IMA, and left renal artery (LtRA). METHODS: From a total of 60 cadavers, 32 cadavers with few arteriosclerotic lesions and little vascular tortuosity were selected for the study. The abdominal aorta (Ao) were removed and incised on both lateral side, along the vertical axis and transected into the ventral and dorsal sides...
2017: Okajimas Folia Anatomica Japonica
https://www.readbyqxmd.com/read/28637960/pacemaker-induced-metallic-artifacts-in-coronary-computed-tomography-angiography-clinical-feasibility-of-single-energy-metal-artifact-reduction-technique
#5
Tomoya Takayanagi, Takehiro Arai, Makoto Amanuma, Tomonari Sano, Masato Ichiba, Kazumasa Ishizaka, Takako Sekine, Hideyuki Matsutani, Hitomi Morita, Shinichi Takase
BACKGROUND: Coronary computed tomography angiography (CCTA) in patients with pacemaker suffers from metallic lead-induced artifacts, which often interfere with accurate assessment of coronary luminal stenosis. The purpose of this study was to assess a frequency of the lead-induced artifacts and artifact-suppression effect by the single energy metal artifact reduction (SEMAR) technique. METHODS: Forty-one patients with a dual-chamber pacemaker were evaluated using a 320 multi-detector row CT (MDCT)...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28629625/what-exactly-regression-of-atherosclerosis-or-foreign-body-reaction-with-hyaline-arteriosclerosis-drives-transient-scaffolding-of-coronary-arteries-a-pooled-analysis-of-observational-absorb-studies-with-a-serial-multimodality-imaging-substudy-of-absorb-cohort
#6
Alexander N Kharlamov, John A Feinstein, John A Cramer, John A Boothroyd
OBJECTIVES: We aimed to estimate the trends of the artery remodeling after transient scaffolding. BACKGROUND: At least 2.62% reduction of the per cent atheroma volume (PAV) or plaque burden (PB) performed in ABSORB B trial at 60months. METHODS: The detailed multiple serial imaging evaluation was performed by intravascular ultrasound (IVUS) in comparison with quantitative coronary angiography (QCA), multislice CT (MSCT) and optical coherence tomography (OCT) thru 24months in the ABSORB cohort B1 trial (n=45) with the pooled analysis in ABSORB A and B trials (n=131)...
June 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28626825/phace-s-syndrome-report-of-a-case-with-new-ocular-and-systemic-manifestations
#7
Raheleh Assari, Vahid Ziaee, Sasan Moghimi, Mohammad Reza Akbari, Arash Mirmohammadsadeghi
PURPOSE: To describe an infant with PHACE(S) syndrome [posterior fossa anomalies (P), hemangiomas (H), arterial anomalies (A), cardiac abnormalities and coarctation of aorta (C), eye abnormalities (E), and the sternal defects (S)] with unusual strabismus, congenital glaucoma, and new systemic manifestations. METHODS: A 6-month-old girl was referred with large hemangiomas on the left side of the face. RESULTS: In the ocular examination, right esotropia and hypotropia, and limitation of elevation in adduction in the right eye were seen...
June 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28620616/the-impact-of-combining-a-low-tube-voltage-acquisition-with-iterative-reconstruction-on-total-iodine-dose-in-coronary-ct-angiography
#8
Toon Van Cauteren, Gert Van Gompel, Kaoru Tanaka, Douwe E Verdries, Dries Belsack, Koenraad H Nieboer, Inneke Willekens, Paul Evans, Sven Macholl, Guy Verfaillie, Steven Droogmans, Johan de Mey, Nico Buls
OBJECTIVES: To assess the impact of combining low-tube voltage acquisition with iterative reconstruction (IR) techniques on the iodine dose in coronary CTA. METHODS: Three minipigs underwent CCTA to compare a standard of care protocol with two alternative study protocols combining low-tube voltage and low iodine dose with IR. Image quality was evaluated objectively by the CT value, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) in the main coronary arteries and aorta and subjectively by expert reading...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28619833/ct-angiography-aspects-predicts-outcome-much-better-than-noncontrast-ct-in-patients-with-stroke-treated-endovascularly
#9
F Sallustio, C Motta, S Pizzuto, M Diomedi, B Rizzato, M Panella, F Alemseged, M Stefanini, S Fabiano, R Gandini, R Floris, P Stanzione, G Koch
BACKGROUND AND PURPOSE: Noncontrast CT ASPECTS has been investigated as a predictor of outcome in patients with acute ischemic stroke. Our purpose was to investigate whether CTA source images are a better predictor of clinical and radiologic outcomes than NCCT ASPECTS in candidates for endovascular stroke therapy. MATERIALS AND METHODS: CT scans of patients (n = 124) were independently evaluated by 2 readers for baseline NCCT and CTA source image ASPECTS and for follow-up ASPECTS...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28617686/imaging-adult-patients-with-coarctation-of-the-aorta
#10
Akanksha N Thakkar, Ponraj Chinnadurai, C Huie Lin
PURPOSE OF REVIEW: To provide an overview of current recommendations and techniques used to image coarctations of the aorta. RECENT FINDINGS: Imaging of coarctation of the aorta in adults is moving away from conventional techniques such as echocardiography and invasive angiography. Echocardiography may assist in making the diagnosis but is limited in its ability to quantify the severity of coarctations. Current guidelines recommend that every patient with a coarctation must undergo a computed tomography (CT) or MRI scan for accurate delineation of morphology...
June 15, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28613933/quantification-of-radiation-dose-reduction-by-reducing-z-axis-coverage-in-320-detector-coronary-ct-angiography
#11
D J Murphy, A Keraliya, N Himes, A Aghayev, R Blankstein, M L Steigner
OBJECTIVES: To quantify the radiation dose reduction achievable by minimizing z-axis coverage in 320-detector coronary computed tomography angiography (CCTA). METHODS: We retrospectively reviewed 130 CCTAs performed on 320-detector CT that offers up to 16cm z-axis coverage (adjustable in 2cm increments), allowing complete coverage of the heart in a single gantry rotation. For each CT we obtained the radiation dose (CTDIvol and DLP), measured the z-axis field of view and measured the craniocaudal cardiac size (distance from the left main coronary artery to the cardiac apex)...
June 14, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28612276/clinical-risk-stratification-of-acute-pulmonary-embolism-comparing-the-usefulness-of-cta-obstruction-score-and-pulmonary-perfusion-defect-score-with-dual-energy-ct
#12
Wei-Fang Kong, Yu-Ting Wang, Long-Lin Yin, Hong Pu, Ke-Yan Tao
To compare the ability of CT angiography (CTA) obstruction score and perfusion defect score on dual energy CT perfusion imaging (DEPI) for clinical risk stratification of patients with acute pulmonary embolism (PE). 55 patients diagnosed as acute PE either by CTA or DEPI were retrospectively enrolled. Patients were grouped into high-, intermediate-, and low-risk groups in accordance to the renewed guidelines of 2014. Consistency between DEPI and CTA in diagnosis of PE were assessed. Correlations between CT parameters and right-to-left ventricular (RV/LV) diameter ratio were evaluated...
June 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28611006/intensive-versus-moderate-atorvastatin-therapy-and-one-year-graft-patency-after-cabg-rationale-and-design-of-the-active-aggressive-cholesterol-therapy-to-inhibit-vein-graft-events-randomized-controlled-trial-nct01528709
#13
Alexander Kulik, Amy M Abreu, Viviana Boronat, Marc Ruel
RATIONALE: Saphenous vein graft disease remains a major limitation of coronary artery bypass graft surgery (CABG). Statin therapy inhibits the development of vein graft disease and improves outcomes after CABG. However, it is unclear whether treatment with high-dose statins will further slow the process of vein graft disease and improve graft patency, as compared to conventional moderate doses. Therefore, the goal of this study will be to evaluate the efficacy of high-dose statin therapy versus moderate-dose statin therapy for the prevention of saphenous vein graft occlusion following CABG...
June 10, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28607546/histologic-sequelae-of-apical-hypertrophic-cardiomyopathy-dystrophic-calcification
#14
Shahryar G Saba, John N Makaryus, Navid Rahmani, Ram Jadonath
We present cardiac computed tomography (CT) findings demonstrating apical hypertrophic cardiomyopathy with dystrophic calcification of the left ventricular apex. The absence of significant epicardial coronary artery disease demonstrated by coronary CT angiography suggests that increased wall tension and decreased microvascular perfusion over time account for the dyskinetic apical myocardium, rather than myocardial infarction secondary to atherosclerotic plaque rupture. These observations support CT as the imaging modality of choice to visualize the deposition of calcium in injured myocardial tissue, a recognized occurrence in chronically infarcted myocardium...
2017: Clinical Medicine Insights. Cardiology
https://www.readbyqxmd.com/read/28607128/relationship-of-hypertension-to-coronary-atherosclerosis-and-cardiac-events-in-patients-with-coronary-computed-tomographic-angiography
#15
Rine Nakanishi, Lohendran Baskaran, Heidi Gransar, Matthew J Budoff, Stephan Achenbach, Mouaz Al-Mallah, Filippo Cademartiri, Tracy Q Callister, Hyuk-Jae Chang, Kavitha Chinnaiyan, Benjamin J W Chow, Augustin DeLago, Martin Hadamitzky, Joerg Hausleiter, Ricardo Cury, Gudrun Feuchtner, Yong-Jin Kim, Jonathon Leipsic, Philipp A Kaufmann, Erica Maffei, Gilbert Raff, Leslee J Shaw, Todd C Villines, Allison Dunning, Hugo Marques, Gianluca Pontone, Daniele Andreini, Ronen Rubinshtein, Jeroen Bax, Erica Jones, Niree Hindoyan, Millie Gomez, Fay Y Lin, James K Min, Daniel S Berman
Hypertension is an atherosclerosis factor and is associated with cardiovascular risk. We investigated the relationship between hypertension and the presence, extent, and severity of coronary atherosclerosis in coronary computed tomographic angiography and cardiac events risk. Of 17 181 patients enrolled in the CONFIRM registry (Coronary CT Angiography Evaluation for Clinical Outcomes: An International Multicenter Registry) who underwent ≥64-detector row coronary computed tomographic angiography, we identified 14 803 patients without known coronary artery disease...
June 12, 2017: Hypertension
https://www.readbyqxmd.com/read/28606197/dynamic-four-dimensional-ct-angiography-for-the-assessment-of-pulmonary-perfusion-in-an-adult-patient-with-pulmonary-artery-occlusion-and-major-aortopulmonary-collateral-after-multistage-repair-of-fallot-s-pentalogy
#16
Dirk Loßnitzer, Stefan Baumann, Thomas Henzler
Dynamic CT angiography provides haemodynamic assessment combined with detailed information on complex cardiac anatomy in patients with congenital malformations such as multistage correction of Fallot's Pentalogy.
June 13, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28604373/blunt-hepatic-and-splenic-trauma-a-single-center-experience-using-a-multidisciplinary-protocol
#17
Paolo Ruscelli, Farncesco Buccoliero, Susanna Mazzocato, Giulio Belfiori, Claudio Rabuini, Pierluigi Sperti, Massimiliano Rimini
AIM: The aim of this retrospective study was to describe more than 10 years experience of a single Trauma Center about non operative management of abdominal organ injuries in hemodynamically stable patients MATERIAL OF STUDY: Between January 2001 and December 2014 ,732 consecutive patients were admitted with blunt abdominal trauma, involving liver and/or spleen and/or kidney, at the Bufalini Cesena Hospital .Management of patients included a specific institutional developed protocol :hemodynamic stability was evaluated in shock room according to the patients response to fluid challenge and the patients were classified into three categories A,B,and C...
2017: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/28602902/case-report-a-durable-open-repair-of-a-rare-profunda-aneurysm
#18
Pouria Parsa, Anthony Rios, Kristha Cantu, John Eidt, Dennis Gable, Gregory Pearl
Profunda femoris artery aneurysms (PFAAs) are rare and difficult to diagnose in the early stages of development due to location and encasement in the deep thigh musculature. We report the case of a 74-year-old male who was discovered to have a right PFAA during evaluation for progressively worsening short distance claudication. He had undergone an angioplasty of the left iliofemoral system several months ago with no improvement of his symptoms. The PFAA was diagnosed through CT angiography and repaired via syndactylization of profunda femoris branches and interposition grafting with a polytetrafluoroethylene stretch graft...
June 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28602809/potential-of-%C3%AE-7-nachr-pet-imaging-in-atherosclerosis
#19
REVIEW
P F Ellen Boswijk, Matthias Bauwens, Felix M Mottaghy, Joachim E Wildberger, Jan Bucerius
Atherosclerotic events are usually acute and often strike otherwise asymptomatic patients. Although multiple clinical risk factors have been associated with atherosclerosis up to date, no further individual prediction can be made as to who will acutely suffer from its consequences based on traditional imaging methods like CT, MRI or angiography, or biomarkers. Previously, non-invasive imaging with (18)F-fluorodeoxyglucose ((18)F-FDG) PET was shown to potentially fill this niche as it offers high sensitive detection of metabolic processes associated with inflammatory changes in atherosclerotic plaques...
June 7, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28600674/-value-of-cardiac-ct-in-the-diagnostic-work-up-of-coronary-artery-disease-update-2017
#20
M Meyer, T Henzler
The quantification of coronary calcifications using noncontrast-enhanced computed tomography (CT) as well as coronary CT angiography (cCTA) have rapidly evolved in the recent years. Nowadays, both techniques are increasingly clinically accepted regarding risk stratification and accurate exclusion of significant coronary artery disease (CAD). The higher acceptance of cCTA is mainly based on the higher robustness, lower radiation exposure through continuous technical innovations as well as by the growing scientific evidence...
June 9, 2017: Der Radiologe
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