排序方式: 共有138条查询结果,搜索用时 15 毫秒
101.
Brian B. Ghoshhajra MD MBA Manavjot S. Sidhu MD Ahmed El‐Sherief MD Carlos Rojas MD Doreen Defaria Yeh MD Leif‐Christopher Engel MD Richard Liberthson MD Suhny Abbara MD Ami Bhatt MD 《Congenital heart disease》2012,7(6):516-525
Adult congenital heart disease patients present a unique challenge to the cardiac imager. Patients may present with both acute and chronic manifestations of their complex congenital heart disease and also require surveillance for sequelae of their medical and surgical interventions. Multimodality imaging is often required to clarify their anatomy and physiology. Radiation dose is of particular concern in these patients with lifelong imaging needs for their chronic disease. The second‐generation dual‐source scanner is a recently available advanced clinical cardiac computed tomography (CT) scanner. It offers a combination of the high‐spatial resolution of modern CT, the high‐temporal resolution of dual‐source technology, and the wide z‐axis coverage of modern cone‐beam geometry CT scanners. These advances in technology allow novel protocols that markedly reduce scan time, significantly reduce radiation exposure, and expand the physiologic imaging capabilities of cardiac CT. We present a case series of complicated adult congenital heart disease patients imaged by the second‐generation dual‐source CT scanner with extremely low‐radiation doses and excellent image quality. 相似文献
102.
Andy?K.?W.?Chan Maros?FerencikEmail author Suhny?Abbara Brian?Ghoshhajra 《Current cardiovascular imaging reports》2014,7(9):9284
With the increasing use of coronary computed tomography angiography (CCTA) as a noninvasive tool to evaluate for coronary artery disease, physicians who request, perform, or interpret these studies should be aware of the associated potential risks of ionizing radiation. This article provides an overview of radiation issues in CT, the risks of diagnostic-level ionizing radiation, and strategies that can be adopted to minimize exposure to radiation of patients undergoing CCTA. 相似文献
103.
104.
Ferencik M Abbara S Hoffmann U Cury RC Brady TJ Achenbach S 《The American journal of cardiology》2004,93(7):949-951
We systematically studied the thickness of the myocardium in the left ventricular apical region in patients without a history of myocardial infarction and with no hemodynamically significant coronary artery disease, using contrast-enhanced multidetector spiral computed tomography with submillimeter collimation. We confirmed previous pathology data and reliably detected a small confined region of the normal apical myocardium with a thickness of 相似文献
105.
Cury RC Ferencik M Hoffmann U Ferullo A Moselewski F Abbara S Booth SL O'Donnell CJ Brady TJ Achenbach S 《The American journal of cardiology》2004,94(3):348-351
The epidemiology of and association between vascular and valvular calcium as quantified by multidetector computed tomography (MDCT) were studied in 416 elderly subjects with no history of coronary artery disease. Coronary calcium (CC), descending thoracic aortic calcium (DTAC), aortic valve calcium (AVC), and mitral valve calcium (MVC) were present in 282 (68%), 214 (51%), 152 (37%), and 68 (16%) subjects, respectively. Multiple logistic regression analysis showed that after adjusting for age and gender, subjects with AVC (odds ratio [OR] 2.3), MVC (OR 2.81), and DTAC (OR 2.79) were independently and significantly more likely to have CC. Further evidence is provided for the notion that calcifications in those regions are associated and that MDCT can be used as a tool for the global assessment of vascular and valvular calcium. 相似文献
106.
Udo Hoffmann Fabian Moselewski Koen Nieman Ik-Kyung Jang Maros Ferencik Ayaz M Rahman Ricardo C Cury Suhny Abbara Hamid Joneidi-Jafari Stephan Achenbach Thomas J Brady 《Journal of the American College of Cardiology》2006,47(8):1655-1662
OBJECTIVES: The purpose of this study was to assess morphology and composition of culprit and stable coronary lesions by multidetector computed tomography (MDCT). BACKGROUND: Noninvasive identification of culprit lesions has the potential to improve noninvasive risk stratification in patients with acute chest pain. METHODS: Thirty-seven patients with acute coronary syndrome (ACS) or stable angina underwent coronary 16-slice MDCT and invasive selective angiography. In all significant coronary lesions two observers measured the degree of stenosis, plaque area at stenosis, and remodeling index and assessed plaque composition. Differences between culprit lesions in patients with ACS and stable lesions in patients with ACS or stable angina were determined. RESULTS: We analyzed 40 lesions with excellent image quality in 14 patients with ACS and 9 patients with stable angina. Culprit lesions in patients with ACS (n = 14) had significantly greater plaque area and a higher remodeling index than both stable lesions in patients with ACS (n = 13) and in patients with stable angina (n = 13) (17.5 +/- 5.9 mm2 vs. 9.1 +/- 4.8 mm2 vs. 13.5 +/- 10.7 mm2, p = 0.02; and 1.4 +/- 0.3 vs. 1.0 +/- 0.4 vs. 1.2 +/- 0.3, p = 0.04, respectively). The prevalence of non-calcified plaque was 100%, 62%, and 77%, respectively, and the prevalence of calcified plaque was 71%, 92%, and 85%, respectively, in culprit lesions in patients with ACS and in stable lesions in patients with ACS or stable angina. CONCLUSIONS: We introduce the concept of noninvasive detection and characterization of coronary atherosclerotic lesions in patients with ACS by MDCT. We identified differences in lesion morphology and plaque composition between culprit lesions in ACS and stable lesions in ACS or stable angina, consistent with previous intravascular ultrasound studies. 相似文献
107.
108.
109.
110.
Meagan K. Murphy Thomas J. Brady Khurram Nasir G. Scott Gazelle Fabian Bamberg Quynh A. Truong Wilfred S. Mamuya Suhny Abbara Thomas H. Lee Ron Blankstein 《Journal of nuclear cardiology》2010,17(5):881-889