Abstract. Flow Theory has been discussed in several aspects
PurposeCalypso® 4D Localization System is a system based on electromagnetic transponders detection enabling precise 3D localisation and continuous tracking of tumour target. This review intended to provide information in order to (1) show how Calypso® 4D Localization System works, (2) to present advantages and disadvantages of this system, (3) to gather information from several clinical studies and, finally, (4) to refer Calypso® System as a tool in dynamic multileaf collimator studies for target motion compensation.MethodsA structured search was carried out on B-On platform. The key words used in this research were ‘Calypso’, ‘Transponder’, ‘Electromagnetic Localization’, ‘Electromagnetic Tracking’, ‘Target Localization’, ‘Intrafraction Motion’ and ‘DMLC’.ReviewTreatment the implanted transponders are excited by an electromagnetic field and resonate back. These frequencies are detected and Calypso® software calculates the position of the transponders. If the movement detected is larger than the limits previously defined, irradiation can be stopped. The system has been proven to be submillimetre accurate.DiscussionCalypso® System has been presented as an accurate tool in prostate radiotherapy treatments. The application of this system to other clinical sites is being developed.ConclusionThe Calypso® System allows real-time localisation and monitoring of the target, without additional ionising radiation administration. It has been a very useful tool in prostate cancer treatment.
The Chalcolithic time is a period widely debated in Southwestern Iberia Late Prehistory. During the last few decades, the number of contexts known has grown, especially with the discovery and publication of several ditched enclosures from Southern Portugal. To contribute to ongoing discussions, three Chalcolithic pits –13, 16, 54– from the Complex of ditched enclosures of Monte das Monte das Cabeceiras 2, in Beja, were analysed from a zooarchaeological and taphonomical perspective. The results are combined with information from the material culture, human remains and stratigraphy in order to discuss infilling sequences. Hypothesis on the possible meaning of social practices related to the management of animals are addressed. Bovine, caprine, swine, cervids, leporids and canids were identified with different abundances. A possible feasting or offerings of bovine –including auroch– and to a lesser extent red deer, wild boar and domestic species is suggested for pit 13, where a burial was also identified. Pottery and animal depositions were recorded in this pit, and the contiguous pit 54 that also had human remains. Pit 16 had a possible selection of horns and antlers from bovine, caprine and cervids, as well as a deposition of canid limb bones inside a large pot. The pits analysed can be framed in the wider Southwestern Iberian Peninsula phenomena of ditched enclosures where structured deposits including animal remains are recurrent.
Resumo. É sabido que a disciplina de Matemática é considerada uma das
Procedimento de Lecompte para a correção de transposição das grandes artérias, associada à comunicação interventricular e obstrução de via de saída do ventrículo esquerdo Lecompte procedure for correction of the transposition of the great arteries associated with ventricular septal defect and left ventricle outflow tract obstruction Abstract Objective: To evaluate the Lecompte procedure used for the correction of transposition of the great arteries (TGA) associated with ventricular septal defect (VSD) and left ventricle outflow tract obstruction (LVOTO) and to present the intermediate and long-term results of the surgery. Methods: Between February 1994 and July 2005, seven patients with ages between 2 and 8 years (median: 3.0) suffering from TGA, VSD and LVOTO underwent corrective surgery. In six cases, the Lecompte procedure was performed. This technique consists in right ventriculotomy, extensive resection of the conal septum and construction of a ventricular tunnel connecting the left ventricle to the aorta (LV-Ao). The remaining case presented with obstruction of a valvular prosthesis implanted between the right ventricle and the pulmonary artery (RV-PA) and RV failure. This case was converted to the Lecompte procedure. Results: The cardiopulmonary bypass time varied from 105 to 194 minutes (Median: 130) and the aortic clamping time varied from 65 to 90 minutes (Median: 78). There was one death in the immediate post-operative period due to coagulopathy followed by RV failure. Six patients were released from hospital between the 5th to 30th postoperative days (Median: 11) and the follow up period was from 12 to 144 months (Median: 73.6). Conclusions: The Lecompte procedure presents the following advantages: 1. Surgical indication for infants, 2. Low morbidity and mortality rates, 3. Free from reoperation over the long term. 4. Possibility of conversion of the Rastelli procedure into the Lecompte procedure.
O artigo pretende uma discussão sobre o direito de governar dos potentados locais como princípio lógico da teoria de poder português de soberania compartilhada. Do direito consuetudinário de mando que se estabelece no sertão do São Francisco, referenciado pelas práticas de poder do capitão mor Manuel Nunes Viana e das suas redes clientelares demonstradas num dos maiores conflitos contra a nomeação do governador à capitania das Minas, o estopim da Guerra dos Emboabas, até os inúmeros motins como estratégia de consolidação de um governo dos súditos. Os Territórios de Mando são analisados como uma categoria histórica para a capitania das Minas, donde a prática de poder e de domínio dos homens rústicos, tornam-se experiências históricas na construção da ideia de comunidade política participativa, auferida pela própria teoria de poder português de liberalidade política dos súditos. Este exercício de poder local compartilhado foi praticado pelos potentados locais e se constituirá como o cimento da cultura política republicana no futuro.
A retrospective study was undertaken of patients with hypoplastic right ventricles, either with pulmonary atresia and intact ventricular septum or critical pulmonary valvar stenosis, and duct-dependent pulmonary blood flow who were investigated at the Royal Brompton Hospital between January 1976 and December 1990. The diagnosis was made on the basis of at least one diagnostic method (cross-sectional echocardiography, cardiac catheterization and angiography, or autopsy). Of the patients, 56 (82%) were found to have an imperforate pulmonary valve or infundibulum (pulmonary atresia), while 12(18%) had critical pulmonary valvar stenosis. The ratio of the diameters of the tricuspid and mitral valvar orifices was measured angiographically during diastole, and the right ventricle was analyzed according to the presence or overgrowth of the inlet, apical trabecular and oudet components. A correlation was made between the severity of the disease and the outcome. The overall mortality was 53% when those not undergoing any surgery were excluded, and significant differences were found between the group dying and those who survived. The incremental risk factors for death were a ratio between the diameter of the tricuspid and mitral valves of less than 0.6; the presence of fistulous communications with die coronary arteries; and obliteration of the apical trabecular component of the right ventricle. There was no significant difference between the group with pulmonary valvar atresia and the group with critical stenosis of the pulmonary valve.Key words: Pulmonary atresia with intact septum; critical pulmonary stenosis; analysis of results P ulmonary atresia with intact ventricular septum is a relatively rare malformation accounting for approximately 1% of all congenital heart diseases. 1 It is important because of its continuing high mortality. 12 Studies of natural history show that about 50% of the patients die in the first two weeks of life, 1 with survival depending on the patency and size of the arterial duct. Right ventricular hypoplasia, either in the presence of critical pulmonary valvar stenosis or in pulmonary atresia with intact ventricular septum, can vary in degree from mild to severe, the latter being characterized by the presence of heavy fibromuscular trabeculations, particularly in the apex, which obliterate the apical trabecular component and often, the infundibulum. The size of the tricuspid valve is direcdy related to that of the right ventricular cavity. 3
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.