Results 251 to 260 of about 825,159 (286)
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Magnetic Resonance in Medicine, 1992
AbstractMeasurement of tissue perfusion is important for the functional assessment of organs in vivo. Here we report the use of 1H NMR imaging to generate perfusion maps in the rat brain at 4.7 T. Blood water flowing to the brain is saturated in the neck region with a sliceselective saturation imaging sequence, creating an endogenous tracer in the form
J A, Detre +3 more
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AbstractMeasurement of tissue perfusion is important for the functional assessment of organs in vivo. Here we report the use of 1H NMR imaging to generate perfusion maps in the rat brain at 4.7 T. Blood water flowing to the brain is saturated in the neck region with a sliceselective saturation imaging sequence, creating an endogenous tracer in the form
J A, Detre +3 more
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The Annals of Thoracic Surgery, 2007
Aortic arch surgery necessitates interrupted brain perfusion and carries a risk of brain injury. Various brain protective techniques have been advocated to reduce risk including hypothermic arrest and retrograde or selective antegrade perfusion. Knowledge of the pathophysiologic consequences of deep hypothermia, may aid the surgeon in deciding when to ...
Deborah K, Harrington +2 more
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Aortic arch surgery necessitates interrupted brain perfusion and carries a risk of brain injury. Various brain protective techniques have been advocated to reduce risk including hypothermic arrest and retrograde or selective antegrade perfusion. Knowledge of the pathophysiologic consequences of deep hypothermia, may aid the surgeon in deciding when to ...
Deborah K, Harrington +2 more
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British Medical Bulletin, 1989
The term perfusion has varied connotations in different situations. The word perfusion comes from the Latin to pour or diffuse through or over. Myocardial perfusion depends on (a) coronary artery or vessel flow, and (b) myocardial or muscle flow.
A C, Tweddel, W, Martin, I, Hutton
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The term perfusion has varied connotations in different situations. The word perfusion comes from the Latin to pour or diffuse through or over. Myocardial perfusion depends on (a) coronary artery or vessel flow, and (b) myocardial or muscle flow.
A C, Tweddel, W, Martin, I, Hutton
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Journal of Magnetic Resonance Imaging, 2013
MRI has become a reliable tool in medical imaging for assessing morphological and functional details of the human body in a noninvasive manner. Perfusion is an important parameter to assess status and functionality of tissue and organs. This review summarizes the different approaches to measure perfusion based on MRI.
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MRI has become a reliable tool in medical imaging for assessing morphological and functional details of the human body in a noninvasive manner. Perfusion is an important parameter to assess status and functionality of tissue and organs. This review summarizes the different approaches to measure perfusion based on MRI.
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Nature, 1991
Perfusion chromatography is a technique based on fluid dynamics for reducing stagnant mobile phase mass transfer in liquid chromatography. This is achieved by using supports with large pores that allow mobile phase to flow through particles.
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Perfusion chromatography is a technique based on fluid dynamics for reducing stagnant mobile phase mass transfer in liquid chromatography. This is achieved by using supports with large pores that allow mobile phase to flow through particles.
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Increased Pulmonary Perfusion Worsens Ventilation-Perfusion Matching
Anesthesiology, 1993Severe exercise and administration of vasopressors may adversely affect pulmonary gas exchange in humans. The role of increases in pulmonary perfusion in worsening ventilation-perfusion (VA/Q) relationships is unclear, however, because concomitant changes in ventilation and alveolar gas composition occur.
K B, Domino +3 more
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Extracorporeal lung perfusion (ex-vivo lung perfusion)
Current Opinion in Organ Transplantation, 2016The number of patients listed for lung transplantation largely exceeds the number of available transplantable organs because of both a shortage of organ donors and a low utilization rate of lungs from those donors. A novel strategy of donor lung management, ex-vivo lung perfusion (EVLP), that keeps the organ at physiological protective conditions has ...
Marcelo, Cypel, Shaf, Keshavjee
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Ventilation/perfusion relationships
Clinical Physiology, 1980Summary. Over the last 10 years the investigation of V̇A/Q̇ relationships has been significantly advanced as a result of the application of computer‐assisted engineering techniques to the traditional concepts and equations of gas exchange. The price paid for this increase in ability to measure V̇A/Q̇ relationships has been an increase in the ...
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Transmural myocardial perfusion
Progress in Cardiovascular Diseases, 1987The predilection for subendocardial underperfusion and ischemia is great and must be considered in the management of any patient, especially if there is coronary artery disease or ventricular hypertrophy. Although the mechanisms of subendocardial ischemia remain to be fully defined, they are clearly associated with the transmural distribution of ...
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Digital Perfusion Phantoms for Visual Perfusion Validation
American Journal of Roentgenology, 2012Despite the increasingly broad use of perfusion applications, we still have no generally accessible means for their verification: The common sense of perfusion maps and "bona fides" of perfusion software vendors remain the only grounds for acceptance.
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