radiación

Introduction: Actinic prurigo is a chronic photodermatosis. It affects the Latin American population more frequently, predominantly women, and involves the sun-exposed areas of the skin, conjunctiva, and lips. Objective: To update the information on the clinical-epidemiological characteristics and treatment of patients with actinic prurigo in Colombia. Materials and methods: We conducted a cross-sectional study including the medical records of patients with actinic prurigo treated in the Photodermatology Service of Hospital Universitario Centro Dermatológico Federico Lleras Acosta between 2011 and 2016...

Objetivo: Describir los efectos cardiovasculares del tratamiento del cáncer infantil en supervivientes mediante métodos clínicos, electrocardiográficos y ecocardiográficos. Material y métodos: Estudio transversal y observacional de casos y controles de 34 pacientes de una clínica de supervivientes de cáncer infantil, evaluados de forma clínica, con electrocardiograma, ecocardiografía convencional y strain. Edad promedio de 13.03 años; dosis acumulada de antracíclicos promedio de 219.5 mg/m2; siete además con radiación a tórax...

ANTECEDENTES: La colitis actínica es una endarteritis obliterante ocasionada por exposición a radiación ionizante. Se manifiesta de manera aguda (primeras semanas) o crónica (hasta 30 años después). CASO CLÍNICO: Paciente tratado por neoplasia rectal mediante quimiorradioterapia y amputación abdominoperineal. En su estudio por cuadros oclusivos se objetiva una estenosis colónica desde la colostomía hasta el ángulo hepático. Se lleva a cabo cirugía resectiva, con resultado favorable...

BACKGROUND: In 2016, the American Society of Colon and Rectal Surgeons published a rectal cancer surgery checklist composed of the essential elements of preoperative, intraoperative, and postoperative care for patients undergoing rectal cancer surgery. OBJECTIVE: The purpose of this study was to assess whether compliance with preoperative checklist elements was associated with improved pathologic and 30-day postoperative outcomes after rectal cancer surgery. DESIGN: This was a retrospective cohort study...

INTRODUCTION: T-cell lymphoid dyscrasia is a group of different, infrequent, epitheliotropic inflammatory dermatosis that precede cutaneous T-cell lymphomas. Treatment with ultraviolet radiation is safe and efficacious. OBJECTIVE: To describe responses to treatment, secondary effects and complications. METHOD: Eleven patients with different T-cell lymphoid dyscrasias were treated. Two received psoralens plus ultraviolet A radiation (PUVA) and nine narrow band ultraviolet B radiation (NB-UVB)...

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No abstract text is available yet for this article.

Information about how the laboratory of Centro de Protección e Higiene de las Radiaciones (CPHR), Cuba establishes its traceability to the International System of Units for the measurement of radionuclides in environmental test items is presented. A comparison among different methodologies of uncertainty calculation, including an analysis of the feasibility of using the Kragten-spreadsheet approach, is shown. In the specific case of the gamma spectrometric assay, the influence of each parameter, and the identification of the major contributor, in the relative difference between the methods of uncertainty calculation (Kragten and partial derivative) is described...

No abstract text is available yet for this article.

The Grup de Física de les Radiacions (GFR) of the Universitat Autònoma de Barcelona (UAB), in collaboration with the Institute for Radiological Protection and Nuclear Safety (IRSN), has developed a passive Bonner sphere system (UAB-BSS), with gold foils as thermal neutron detectors, for application in pulsed neutron fields or in mixed neutron-photon fields with high photon intensities. In such fields, active devices suffer from saturation and dead-time effects. The MCNPX Monte-Carlo code has been used to determine the response to neutrons of different energies of each polyethylene sphere belonging to the BSS...

The Spanish National Reference Database for Ionizing Radiations (BANDRRI) is being implemented by a reasearch team in the frame of a joint project between CIEMAT (Unidad de Metrologia de Radiaciones Ionizantes and Direccion de Informatica) and the Universidad Nacional de Educacion a Distancia (UNED, Departamento de Mecanica y Departamento de Fisica de Materiales). This paper presents the main objectives of BANDRRI, its dynamic and relational data base structure, interactive Web accessibility and its main radionuclide-related contents at this moment...