نتایج جستجو برای: navigator and mendicant
تعداد نتایج: 16827503 فیلتر نتایج به سال:
BACKGROUND Magnetic Resonance Imaging (MRI) 2D phase-contrast flow measurement has been regarded as the gold standard in blood flow measurements and can be performed with free breathing or breath held techniques. We hypothesized that the accuracy of flow measurements obtained with segmented phase-contrast during breath holding, and in particular higher number of k-space segments, would be non-i...
Introduction: The acquisition of Cardiac MR volumes usually requires monitoring diaphragmatic motion to correct for breathing artifacts. In particular navigator echoes and self-respiratory techniques (k0 profiles) can be used to acquire static high-resolution or cine images respectively. However, undesired cardiac motion, field inhomogeneities and high adipose fat signal may reduce the quality ...
Interand intra-specific variations in cytochrome b (Cytb) sequence were assessed in 22 specimens of Sorex palustris Richardson, 1828 and 6 specimens of Sorex bendirii (Merriam, 1884) from 20 locations in western North America. Phylogenetic analyses revealed three distinct clades: Boreal (S. p. palustris), Cordilleran (S. p. brooksi, S. p. navigator), and Coastal (S. b. palmeri, S. b. bendirii)....
Introduction: Respiratory triggering is a technique that reduces motion artifacts by synchronizing the measurement with the breathing cycle of the patient and by placing the data acquisition period into the relatively quiet end expiration phase [1]. The physiological signal needed by the trigger algorithm can be derived from the motion of the abdominal wall with a pneumatic sensor or by measuri...
BACKGROUND Despite increases in HIV testing, only a fraction of people newly diagnosed with HIV infection enter the care system and initiate antiretroviral therapy (ART) in South Africa. We report on the design and initial enrollment of a randomized trial of a health system navigator intervention to improve linkage to HIV care and TB treatment completion in Durban, South Africa. METHODS/DESIG...
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