Introduction: Background: Radiotherapy of parotid tumors is achieved by different radiotherapy techniques. So they deliver the dose to organs at risk such as contralateral parotid, temporal lobe & spinal cord. The consequences of high dose to OARs are xerostomia, Temporal lobe necrosis and loss of hearing. Purpose: The aim of this study was to compare different treatment tech...

Introduction: Estimates of myocardial blood flow (MBF) from first-pass contrast-enhanced cardiac magnetic resonance (CMR) imaging require accurate measurement of the arterial input function (AIF) from the left-ventricular (LV) blood pool. Both dual-bolus [1] and dual-sequence [2,3] CMR methods have been proposed to maintain the linearity of the LV signal during the contrast passage. Several stu...

Dry matter intake (DMI) is a primary determinant of milk production in grazing dairy cows and an ability to measure the DMI individual would allow herd managers formulate supplementary rations that consider amount nutrients ingested from grass. The 2 related aims this experiment were define mean number swallowed boli mass Holstein-Friesian cattle offered variety forages commonly fed industry so...

BACKGROUND Mathematical modeling of cardiovascular magnetic resonance perfusion data allows absolute quantification of myocardial blood flow. Saturation of left ventricle signal during standard contrast administration can compromise the input function used when applying these models. This saturation effect is evident during application of standard Fermi models in single bolus perfusion data. Du...

During feeding, solid food is chewed and propelled to the oropharynx, where the bolus gradually aggregates while the larynx remains open and breathing continues. The aggregated bolus in the valleculae is exposed to respiratory airflow, yet aspiration is rare in healthy individuals. The mechanism for preventing aspiration during bolus aggregation is unclear. One possibility is that alterations i...

BACKGROUND In this randomized, double-blind study, the authors investigated the efficacy of continuous and patient-controlled ropivacaine infusions via an infraclavicular perineural catheter in ambulatory patients undergoing moderately painful orthopedic surgery at or distal to the elbow. METHODS Preoperatively, patients (n = 30) received an infraclavicular perineural catheter and nerve block...

Objectives. The efficacy of high dose furosemide as a continuous infusion was compared with a bolus injection of equal dose in patients with severe heart failure. Background. The delivery rate of furosemide into the nephron has been proved to be a determinant of diuretic efficacy in healthy volunteers. Methods. In a randomized crossover study we compared the efficacy of a continuous infusion of...