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Radiation coronary angio

Megha Prasad, Andrew Cassar, Kenneth A Fetterly, Malcolm Bell, Heike Theessen, Olivier Ecabert, John F Bresnahan, Amir Lerman
OBJECTIVES: To determine the feasibility of automated co-registration of angiography and intravascular ultrasound (IVUS) to facilitate integration of these two imaging modalities in a synchronous manner. BACKGROUND: IVUS provides cross-sectional imaging of coronary arteries but lacks overview of the vascular territory provided by angiography. Co-registration of angiography and IVUS would increase utility of IVUS in the clinical setting. METHODS: Forty-nine consecutive patients undergoing surveillance for cardiac allograft vasculopathy with angiography and IVUS of the left anterior descending artery (LAD) were enrolled...
November 28, 2015: Catheterization and Cardiovascular Interventions
Juergen Meyhōer, Johanna Ahrens, Michael Neuss, Frank Hōlschermann, Thomas Schau, Christian Butter
OBJECTIVE: To evaluate the clinical value of 3D rotational angiography, as a tool for imaging and measuring 3D anatomy, coupled with transesophageal echocardiogram (TEE) as preinterventional imaging for transcatheter aortic valve implantation (TAVI) procedures. BACKGROUND: TAVI is a growing field in cardiology. An understanding of the 3D anatomy of the aortic root is crucial for patient selection and for the optimal planning and guidance of such procedures. Current techniques include 3D imaging (with MSCT MRI and 3D TEE) combined with multiplane TEE...
April 1, 2012: Catheterization and Cardiovascular Interventions
Olivier Vignaux
TECHNOLOGICAL PROGRESS: Although cardiac magnetic resonance imaging (MRI) is now recognised as the imaging method of choice for the morphological study of the heart, recent technological progress have widened its indications to functional analysis of the heart rate, perfusion and contractility. FUNCTIONAL ASSESSMENT: The possibility of conducting pharmacological stress tests enhances the functional exploration of cardiac perfusion and contractility. The rapid sequences in apnea, tissue marking and injection of contrast products are all elements that help to refine the study of the locoregional consequences of an ischemia: does the myocardial tissue contract normally? Is it sufficiently perfused? Is it still viable? THE BENEFITS OF A NON-INVASIVE TECHNIQUE: The MRI offers clinicians a non-invasive and non-radiating imaging technique that is the perfect supplement to echocardiography...
July 31, 2004: La Presse Médicale
C W Joh, C H Park, H J Kang, Y T Oh, Chun, H S Kim, B I Choi, K B Park, Y M Kim, K H Kim, Y W Vahc, J S Jang, B K Lee
The purpose of this study was to estimate the absorbed dose distribution of Ho-166 endovascular beta irradiation using an angio-catheter. The liquid form of Ho-166 was produced at the Korea Atomic Energy Research Institute (KAERI) by an (n,gamma) reaction. Ho-166 has a half-life of 26.8 h and emits a high-energy beta particle with a maximum energy of 1.85 MeV. GafChromic film was used for the estimation of the absorbed dose of beta particles. A Co-60 teletherapy source and a 6 MV photon beam from a linear accelerator were used to generate dose-optical density calibration curves...
October 2000: Nuclear Medicine Communications
H Lehmkuhl, R Altstidl, T Machnig, B Blunck, K Barth, K Bachmann
The angiocardiographic evaluation of left ventricular end-diastolic (LVEDV) and end-systolic (LVESV) volumes and ejection fraction (EF) is routinely performed by the area-length method (ALM) but may lead to erroneous results. Digital imaging in real time allows densitometric procedures of determining left ventricular (LV) performance to be applied alternatively. In this study, we present densitometric algorithms for the analysis of LVEDV, LVESV, and EF from digital image data, establish accuracy and reproducibility, and determine value and limitations in comparison with ALM in single-plane 30 degrees right anterior oblique (RAO) projection...
September 1996: Clinical Cardiology
A Fontanelli, G Bernardi, G Morocutti, A Di Chiara
We describe the case of a patient (pt) treated with radiotherapy for Hodgkin's lymphoma at the age of 17. Two years later he presented an apical AMI and underwent coronary angiography (CA) for postinfarction angina. A 40% stenosis of the left anterior descending (LAD) was found in the proximal portion and the vessel was occluded at the middle level. Septal and diagonal branches supplied collaterals to the distal LAD and left ventricular function was only mildly reduced (EF angio-ventriculographic = 52%). We successfully performed a first PTCA, but the pt was re-admitted to our hospital few days later for a new large anterior myocardial infarction with refractory hypotension and low output condition...
July 1995: Giornale Italiano di Cardiologia
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