scholarly journals Fusion of intravenous contrast-enhanced C-arm CT and pretreatment imaging for ablation margin assessment of liver tumors: A preliminary study

2012 ◽  
Vol 22 (4) ◽  
pp. 251 ◽  
Author(s):  
Jin Iwazawa ◽  
Takashi Mitani ◽  
Shoichi Ohue ◽  
Naoko Hashimoto
Keyword(s):  
Liver Tumors ◽  
Margin Assessment ◽  
Intravenous Contrast ◽  
Ablation Margin ◽  
Contrast Enhanced ◽  
Preliminary Study

scholarly journals MRA Mapping and Selective Embolization of a Large Uterine Cavity Pseudoaneurysm at 20 Weeks of Gestation

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Jean V. Storey ◽  
Timothy B. Dinh ◽  
Deirdre M. McCullough ◽  
Steven H. Craig ◽  
Christian L. Carlson
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Mortality Risk ◽  
Vascular Malformations ◽  
Uterine Cavity ◽  
Massive Hemorrhage ◽  
Fetal Mortality ◽  
Intravenous Contrast ◽  
Selective Embolization ◽  
Contrast Enhanced

Antepartum uterine cavity pseudoaneurysm rupture can cause massive hemorrhage with high maternal and fetal mortality risk. Invasive placentation can predispose to vascular malformations. We present a novel use of macrocyclic intravenous contrast-enhanced magnetic resonance angiography for preprocedure planning followed by selective low radiation embolization of a uterine cavity pseudoaneurysm in the setting of invasive placentation at 20 weeks of gestation. To our knowledge, this is the first reported case of uterine cavity pseudoaneurysm successfully mapped with MRA and treated with embolization at 20 weeks of gestation.

Abstract 309: Vasovasorum Volume Can Be Measured by Contrast-Enhanced 3D Carotid Duplex Ultrasound: Concept and Design of a Novel Method for Predicting Stroke Risk in Patients With Carotid Artery Stenosis

2014 ◽  
Vol 34 (suppl_1) ◽  
Author(s):  
Isibor J Arhuidese ◽  
Alexander Nodel ◽  
Umair Qazi ◽  
Diana Call ◽  
Bruce Perler ◽  
...  
Keyword(s):  
Stroke Risk ◽  
Duplex Ultrasound ◽  
Population Based ◽  
Severe Stenosis ◽  
Asymptomatic Patients ◽  
Grant Support ◽  
Contrast Enhanced ◽  
Novel Method ◽  
Preliminary Study ◽  
Selection For

Introduction: Stroke remains a leading cause of death and disability. The reliance on the occurrence of symptoms and degree of stenosis for selecting patients with carotid stenosis for intervention is not ideal because it is often seen that patients with severe stenosis remain asymptomatic while many patients with moderate stenosis experience stroke. Furthermore, the majority of patients are asymptomatic until they experience stroke. It is known that intimal neovascularization flourishes as atherosclerotic disease progresses; however no technique in current use adequately correlates neovascularization to stroke risk. Objective: With seed grant support from the Society for Vascular Surgery Foundation we are executing a study based on our hypothesis that Vasovasorum Volume (VVV) measured using CE-3DCDU as a valid tool for mapping stroke risk. Method: We are recruiting symptomatic and asymptomatic patients adjudged to have >50% and >70% stenosis respectively on routine duplex ultrasound. Vasovasorum volume is measured using CE-3DCDU in patients who are eligible for carotid endarterectomy. Plaque removed during surgery is marked, decalcified and immunostained with CD34. Thereafter, VVV is measured in the excised plaque using 3D reconstruction histometry. We then evaluate the reliability and accuracy of CE-3DCDU in relation to the histopathology and compare VVV in symptomatic and asymptomatic patients. Results: The preliminary study included six patients and the results show that VVV measurement in carotid ultrasound and histopathology is feasible and reproducible (Figures 1 and 2). Conclusion: Vasovasorum volume is a promising predictor of stroke risk. By identifying patients who are truly at high risk for stroke, VVV measured by CE-3DCDU will aid precise patient selection for intervention, thus prevent stroke, save lives, limit disability and expend health care resources in an informed manner. The next phase of this project involves the establishment of efficacy and a population based multi-center clinical trial to generate evidence required to incorporate VVV measured using CE-3DCDU into clinical practice.

scholarly journals Risk of acute kidney injury after contrast-enhanced computed tomography in emergency department

2020 ◽  
pp. 102490792091339
Author(s):  
Seda Dağar ◽  
Emine Emektar ◽  
Hüseyin Uzunosmanoğlu ◽  
Şeref Kerem Çorbacıoğlu ◽  
Özge Öztekin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Emergency Department ◽  
Acute Kidney Injury ◽  
Intensive Care ◽  
Contrast Media ◽  
Kidney Injury ◽  
Intravenous Contrast ◽  
Contrast Enhanced ◽  
Enhanced Computed Tomography ◽  
Contrast Enhanced Computed Tomography

Background: Despite its risks associated with renal injury, intravenous contrast media increases diagnostic efficacy and hence the chance of early diagnosis and treatment, which leaves clinicians in a dilemma regarding its use in emergency settings. Objective: The aim of this study was to determine the risk and predictors of contrast-induced acute kidney injury following intravenous contrast media administration for computed tomography in the emergency department. Methods: All patients aged 18 years and older who had a basal creatinine measurement within the last 8 h before contrast-enhanced computed tomography and a second creatinine measurement within 48–72 h after computed tomography scan between 1 January 2015 and 31 December 2017 were included in the study. Characteristics of patients with and without contrast-induced acute kidney injury development were compared. Multivariate regression analysis was used to assess the predictors for contrast-induced acute kidney injury. Results: A total of 631 patients were included in the final statistical analysis. After contrast media administration, contrast-induced acute kidney injury developed in 4.9% ( n = 31) of the patients. When the characteristics of patients are compared according to the development of contrast-induced acute kidney injury, significant differences were detected for age, initial creatinine, initial estimated glomerular filtration rate, and all acute illness severity indicators (hypotension, anemia, hypoalbuminemia, and need for intensive care unit admission). A multivariate logistic regression analysis was performed. The need for intensive care unit admission (odds ratio: 6.413 (95% confidence interval: 1.709–24.074)) and hypotension (odds ratio: 5.575 (95% confidence interval: 1.624–19.133)) were the main factors for contrast-induced acute kidney injury development. Conclusion: Our study results revealed that hypotension, need for intensive care, and advanced age were associated with acute kidney injury in patients receiving contrast media. Therefore, we believe that to perform contrast-enhanced computed tomography in emergency department should not be decided only by checking for renal function tests and that these predictors should be taken into consideration.

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