Cálculo de doses em exames de TC abdómen-pélvico em dois hospitais da região de Lisboa
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2013
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Este trabalho tem como objectivo avaliar se os valores de dose recebida pelos doentes que realizam exames de Tomografia Computorizada (TC) Abdómen-pélvicos em dois hospitais da grande Lisboa estão de acordo com os Níveis de Referência de Diagnóstico Europeus (NRD). Foram comparadas também as unidades dosimétricas de exames realizados com corrente modelada e de exames realizados com corrente contínua em ambos os hospitais. O estudo consistiu na recolha de dados de 200 exames de TC Abdómen-pélvicos, 100 em cada hospital. No Hospital A, a média dos valores de DLPfoi 562,34 mGy.cm e a média dos valores de CTDIvol foi 12,06 mGy. No Hospital B, a média dos valores DLPe CTDIvol foi 767,14 mGy.cm e 15,02 mGy, respectivamente. No total da nossa amostra, concluiu-se que em nenhum exame os valores de unidades dosimétricas ultrapassam os valores dos NRD. Verificou-se também que os exames realizados no Hospital B implicam em média uma maior dose de radiação ionizante para o doente.
This work aims to evaluate whether the dose values received by patients submitted to Abdominal-pelvic Computed Tomography (CT) in two hospitals in the Lisbon area do agree with the Diagnostic Reference Levels. The dosimetric units of examinations performed with modulated and continuous current in both hospitals were also compared.The study consisted in collecting data from 200 abdominal - pelvic CT's, obtained in two hospitals (100 per hospital) . In Hospital A, the mean DLP was 562.34 mGy.cm and the average values CTDIvol was 12.06 mGy. In Hospital B, the mean DLPand CTDIvol was 767.14 mGy.cm and 15.02 mGy, respectively.We have concluded that, from this sample, none of the dosimetric units values exceeded the Diagnostic Reference Levels values. It was also noted that tests performed in B involved higher doses of patient exposure to ionizing radiation.
This work aims to evaluate whether the dose values received by patients submitted to Abdominal-pelvic Computed Tomography (CT) in two hospitals in the Lisbon area do agree with the Diagnostic Reference Levels. The dosimetric units of examinations performed with modulated and continuous current in both hospitals were also compared.The study consisted in collecting data from 200 abdominal - pelvic CT's, obtained in two hospitals (100 per hospital) . In Hospital A, the mean DLP was 562.34 mGy.cm and the average values CTDIvol was 12.06 mGy. In Hospital B, the mean DLPand CTDIvol was 767.14 mGy.cm and 15.02 mGy, respectively.We have concluded that, from this sample, none of the dosimetric units values exceeded the Diagnostic Reference Levels values. It was also noted that tests performed in B involved higher doses of patient exposure to ionizing radiation.
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MEDICINA, TOMOGRAFIAS, DOSAGEM DE RADIAÇÃO, TOMOGRAPHIES, RADIATION DOSAGE, MEDICINE, MEIOS DE DIAGNÓSTICO, DIAGNOSTIC PROCEDURES, RADIAÇÃO IONIZANTE, IONIZING RADIATION, RAIOS X, X-RAYS