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Main Author:	Gonzalo Walwyn-Salas
Format:	Artículo científico
Language:	es
Published:	Instituto Nacional de Investigaciones en Metrología 2011
Subjects:	Ingeniería Patrones dosimétricos radiología diagnóstica
Online Access:	https://www.redalyc.org/articulo.oa?id=223022208003
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ESTABLECIMIENTO Y DISEMINACIÓN EN CUBA DE PATRONES DOSIMÉTRICOS APLICADOS A RADIOLOGÍA DIAGNÓSTICA. Gonzalo Walwyn-Salas Alina Martínez-González Niurka González-Rodríguez Alex Vergara-Gil Stefan Gutiérrez-Lores Ingeniería Patrones dosimétricos radiología diagnóstica Las prácticas médicas con uso de radiaciones ionizantes son las de mayor contribución a la dosis colectiva de la población mundial. Cerca del 90 % de esta contribucións producto del uso de los equipos de rayos X diagnósticos, así pues la medición de la dosis en pacientes es de vital importancia. Hasta hace algunos años en Cuba no existían patrones dosimétricos para proveer al país de servicios de calibración de dosímetros usados en radiología diagnóstica. El presente trabajo resume la paulatina implementación de los patrones dosimétricos de Kerma en aire aplicados a las mediciones clínicas en haces de rayos X diagnósticos. Tmbién se describe la introducción de métoos de calibración asociados a dichos patrones, considerando las recomendaciones internacionales y las características específicas del escenario cubano. La calidad de los resultados que hoy se emiten en el laboratorio está avalada por resultados satisfactorios en varias intercomparaciones internacionales y la incorporación de las mejores capacidades de medición y calibración a las bases de datos del Buró internacional de Pesas y edidas (BIPM). 2011 artículo científico 0138-8576 https://www.redalyc.org/articulo.oa?id=223022208003 es http://www.redalyc.org/revista.oa?id=2230 Boletín Científico Técnico INIMET application/pdf Instituto Nacional de Investigaciones en Metrología Boletín Científico Técnico INIMET (Cuba) Num.1

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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