Results 271 to 280 of about 263,898 (315)

Perfusion Imaging for the Heart

Magnetic Resonance Imaging Clinics of North America
The use of myocardial perfusion imaging during a stress cardiac magnetic resonance (CMR) examination for the evaluation of coronary artery disease is now recommended by both US and European guidelines. Several studies have demonstrated high diagnostic accuracy for the detection of hemodynamically significant coronary artery disease.
Amit R, Patel, Christopher M, Kramer
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Imaging of perfusion using ultrasound

European Journal of Nuclear Medicine and Molecular Imaging, 2010
Ultrasound can be used to image perfusion in two ways: the traditional one using Doppler and the more recent using microbubble contrast agents. Doppler is simple to use and inexpensive but is limited to larger vessels with faster flow rates. It cannot interrogate the microvasculature because bulk tissue movement is faster than capillary flow.
David, Cosgrove, Nathalie, Lassau
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Perfusion Imaging in Liver MRI

Magnetic Resonance Imaging Clinics of North America, 2014
Liver perfusion magnetic resonance (MR) imaging is currently being actively investigated as a functional imaging technique that provides physiologic information on the microcirculation and microenvironment of liver tumors and the underlying liver. It has gained importance in light of antiangiogenic therapy for hepatocellular carcinoma and colorectal ...
Choon Hua, Thng, Tong San, Koh, David, Collins, Dow-Mu, Koh   +3 more
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Cerebral Perfusion Imaging

Journal of Neuro-Ophthalmology, 2005
There are multiple imaging techniques available to assess cerebral perfusion, including positron emission tomography (PET), xenon computed tomography (XeCT), single photon emission computed tomography (SPECT), perfusion-weighted MRI (PWI), and perfusion computed tomography (PCT).
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DIFFUSION AND PERFUSION IMAGING TECHNIQUES

Magnetic Resonance Imaging Clinics of North America, 1995
Diffusion imaging techniques including the Stejskal-Tanner and the stimulated emission of amplitude echoes (STEAM) pulse sequences are discussed. The calculation of apparent diffusion coefficient (ADC) maps is reviewed. The perfusion imaging techniques of blood oxygen level dependent (BOLD) and first pass bolus perfusion techniques as well as the newer
M R, Patel, B, Siewert, S, Warach, R R, Edelman   +3 more
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CT Myocardial Perfusion Imaging

American Journal of Roentgenology, 2015
OBJECTIVE. CT myocardial perfusion imaging is rapidly becoming an important adjunct to coronary CT angiography for the anatomic and functional assessment of coronary artery disease with a single modality. Existing techniques for CT myocardial perfusion imaging include static techniques, which provide a snapshot of the myocardial blood pool, and dynamic
Akos, Varga-Szemes, Felix G, Meinel, Carlo N, De Cecco, Stephen R, Fuller, Richard R, Bayer, U Joseph, Schoepf   +5 more
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Intracranial Perfusion Imaging with Ultrasound

2014
In the last several years, great progress has been made in ultrasound perfusion imaging of the brain. Different approaches have been assessed and shown to be capable of the early detection of cerebral perfusion deficits in stroke patients. Real-time low-mechanical index imaging simplifies the acquisition of perfusion parameters and alleviates many of ...
Stephen, Meairs, Rolf, Kern
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Perfusion Imaging of Cerebrovascular Reserve

Neuroimaging Clinics of North America, 2005
Cerebrovascular reserve reflects the capacity of the brain to maintain adequate blood flow in the face of decreased perfusion pressure. Perfusion imaging, combined with a physiologic or pharmacologic challenge, is a direct method of measuring cerebrovascular reserve.
Clifford J, Eskey, Pina C, Sanelli
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Methodology of brain perfusion imaging

Journal of Magnetic Resonance Imaging, 2001
AbstractNumerous techniques have been proposed in the last 15 years to measure various perfusion‐related parameters in the brain. In particular, two approaches have proven extremely successful: injection of paramagnetic contrast agents for measuring cerebral blood volumes (CBV) and arterial spin labeling (ASL) for measuring cerebral blood flows (CBF ...
E L, Barbier, L, Lamalle, M, Décorps
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Radionuclide imaging of perfusion and hypoxia

European Journal of Nuclear Medicine and Molecular Imaging, 2010
We present a review of radionuclide imaging of tumour vascular physiology as it relates to angiogenesis. We focus on clinical trials in human subjects using PET and SPECT to evaluate tumour physiology, in particular blood flow and hypoxia.A systematic review of literature based on MEDLINE searches updated in February 2010 was performed.Twenty-nine ...
George, Laking, Pat, Price
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