ABSTRACT
The aim of this paper was to develop a thermoluminescent dosimetry method for the absorbed dose determination of 6 MeV high-energy electron beams by thermoluminescent dosimetry. Total body irradiation (TBI) was performed using four dual fields angled at 252° and 285° in high-dose rate (HDR) mode. TBI measurements were investigated to estimate the absorbed dose in different anatomical parts of the patient. Experimental results were obtained using thermoluminescent detectors and solid water phantoms. The TL response of the dosimeters, as a function of the high-energy electron beam (HEEB) absorbed dose, was linear, from 0.1 to 500 cGy. The entrance skin dose (ESD) and isodose distribution on the surface of the treatment were investigated graphically.
Subject(s)
Thermoluminescent Dosimetry/methods , Whole-Body Irradiation/methods , Electrons/therapeutic use , Humans , Mycosis Fungoides/radiotherapy , Phantoms, Imaging , Radiotherapy DosageABSTRACT
Twenty seven patients, inspected by endoscope, and diagnosed as having the Mallory-Weiss syndrome, have been studied taking into account their age, sex, background, clinic presentation, manifestations, number of lacerations, associated lesions and evolution. Twenty three of them were males and 4 females. The age average was 46.7 years. Only 8 patients had intra-abdominal increased pressure, suffering retching and vomiting 7 of them, while one had a cough access. Out of the 21 patients that we controlled, 9 were chronic alcoholism while 3 had ethanol intoxication previously. Immediate prior ingestion of salicylates had taken place in 6 patients. The clinical presentation of 22 of them was gastrointestinal bleeding, that is, 4.9% of all the upper endoscopies carried out within the bleeding patients. Single laceration was present in 22 cases, double one in 4, and triple in 1. We have frequently found endoscopy lesions associated, the most common one (37%), was hiatal hernia. They all were medically treated except one, who was operated because of gastric perforation was associated. Just one of the Mallory-Weiss syndrome patient died, due to an associated diffused bleeding gastritis.
Subject(s)
Mallory-Weiss Syndrome , Esophagogastric Junction/pathology , Female , Gastrointestinal Hemorrhage/etiology , Gastroscopy , Humans , Male , Mallory-Weiss Syndrome/complications , Mallory-Weiss Syndrome/diagnosisABSTRACT
Foram estudados 27 pacientes com diagnostico endoscopico de sindrome de Mallory-Weiss, valorizando os seguintes parametros: idade e sexo, antecedentes, forma de apresentacao, manifestacoes clinicas, numero de dilaceracoes, lesoes associadas e evolucao. Vinte e tres pacientes eram do sexo masculino e 4 do feminino. A idade media foi de 46,5% anos.Somente em 8 foram encontrados antecedentes de aumento de pressao intra-abdominal: 7 com nauseas e vomitos e um com acesso de tosse.Dos 21 doentes controlados nesta serie, 9 eram etilistas cronicos e 3 apresentaram uma intoxicacao alcoolica aguda. Seis contavam uma ingestao recente de salicilatos. Em 22 pacientes a forma de apresentacao foi uma hemorragia digestiva, correspondendo a 4,9% do total de sangrantes nos quais foi realizado endoscopia digestiva alta. Em 22 casos a dilaceracao era unica, em 4 haviam duas dilaceracoes e em um, tres lesoes lineais. Com frequencia foram encontradas lesoes endoscopicas associada, sendo mais comum a hernia hiatal (37%). O tratamento foi medico em todos os casos, salvo em um, no qual foi necessario a cirurgia por uma perfuracao gastrica associada. Um paciente com sindrome de Mallory-Weiss e gastrite erosiva faleceu, sendo a gastrite erosiva a causa principal da hemorragia e do obito