Learn More
This work is devoted to studying the influence of chamber response functions on the standard IMRT verification for the different detector technologies available on commercial devices. We have tested three of the most used 2D detector arrays for radiotherapy dosimetry verification, based on air-ionization chambers and diode detectors. The response function(More)
596 Background: A primary goal of therapy for large early stage breast cancers is to achieve breast conserving surgery (BCS) through tumor mass reduction with neoadjuvant chemotherapy. In addition, induction of pathological complete response (pCR) is reported to prolong disease-free survival. Encouraged by results from recent studies of dose-dense(More)
The Chilean School Lunch program, which serves one million children nationwide, was supplied with three 10-g cookies fortified with 6% bovine hemoglobin concentrate, designed to provide 1 mg bioavailable iron per day. A survey of 1000 children was performed after 3 y. Significant differences in hemoglobin concentrations were found in the children from the(More)
We evaluated the effect of iron-supplemented milk on 86 healthy infants who were followed from 3 to 12 months of age. Whole milk was supplemented with 15 mg elementary iron as ferrous sulphate and 100 mg ascorbic acid per 100 g powder. 104 infants received the same milk with no supplement and served as control. All iron nutritional parameters were higher in(More)
School-age children in Chile received 30 g of wheat-flour biscuits daily through a National School Lunch Program. To improve iron nutrition, these biscuits were fortified with 6% of a bovine hemoglobin concentrate. Hemoglobin iron bioavailability, measured with a double isotope technique, showed that heme-iron absorption in fortified biscuits was high(More)
CHARACTERIZATION OF URINARY TRACT SYMPTOMS AND QUALITY OF LIFE IN PATIENTS WITH DOUBLE-PIG-TAILED URETERAL STENTS Objectives: To prospectively assess the prevalence of urinary tract symptoms caused by indwelling ureteral stents and how they affect their quality of life using an specific questionnaire. Material and methods: A total of 100 patients with(More)
In the year 1997 Siemens introduced the virtual wedge in its accelerators. The idea was that a dose profile similar to that of a physical wedge can be obtained by moving one of the accelerator jaws at a constant speed while the dose rate is changing. This work explores the observed behaviour of virtual wedge factors. A model is suggested which takes into(More)
We have studied 87 puerperal women during the first month postpartum. They were liable to ultrasound on the first, second and third day of this period. Eighteen of them were examined on the 15th and 30th day. The measure of the uterine area (pi x 1/2 length x 1/2 width) is seen as the most sensible method for this evaluation. The uterus involutionated(More)
European regulations require the dose delivered to patients in CT examinations to be monitored and checked against reference levels. Dose estimation has traditionally been performed manually. This is time consuming and therefore it is typically performed on just a few patients and the results extrapolated to the general case. In this work an automated(More)