Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana

One of the main issues in radiology is image analysis and report. The two stages of this process are the extraction of the information from the image and the diagnostic exercise. This paper is a theoretical analysis of image interpretation from a quantitative perspective, using information theory an...

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Autor principal:	Canals L.,Mauricio
Lenguaje:	Spanish / Castilian
Publicado:	Sociedad Médica de Santiago 2003
Materias:	Bayesian analysis Evidence-based medicine Radiology
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872003000500012
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spelling	oai:scielo:S0034-988720030005000122004-12-13Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesianaCanals L.,Mauricio Bayesian analysis Evidence-based medicine Radiology One of the main issues in radiology is image analysis and report. The two stages of this process are the extraction of the information from the image and the diagnostic exercise. This paper is a theoretical analysis of image interpretation from a quantitative perspective, using information theory and Bayesian inference, and relating it to the concepts of evidence based medicine. It is concluded that the amount of information is dependent on the previous state of knowledge and the acquaintance with the clinical history and complementary exams. The three determined stages of the diagnostic process are a priori, conditioned by the image and a posteriori analyses. The first stage is related to the degree of information and knowledge of the case. The second stage is dependent on the conditional probability for the presence of image signs of the disease and it is thus directly dependent on the sensitivity and specificity of the exam. The third stage is dependent of the previous stages, that in the simplest case can be expressed in function of the odds or likelihood ratios. These three stages allow to reach a decision about the usefulness of a given exam and they orient the questions that a given image may answer. They also orient the research on image analysis for an adequate decision making, minimizing diagnostic uncertainty (Rev Méd Chile 2003; 131: 553-61).info:eu-repo/semantics/openAccessSociedad Médica de SantiagoRevista médica de Chile v.131 n.5 20032003-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872003000500012es10.4067/S0034-98872003000500012
institution	Scielo Chile
collection	Scielo Chile
language	Spanish / Castilian
topic	Bayesian analysis Evidence-based medicine Radiology
spellingShingle	Bayesian analysis Evidence-based medicine Radiology Canals L.,Mauricio Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
description	One of the main issues in radiology is image analysis and report. The two stages of this process are the extraction of the information from the image and the diagnostic exercise. This paper is a theoretical analysis of image interpretation from a quantitative perspective, using information theory and Bayesian inference, and relating it to the concepts of evidence based medicine. It is concluded that the amount of information is dependent on the previous state of knowledge and the acquaintance with the clinical history and complementary exams. The three determined stages of the diagnostic process are a priori, conditioned by the image and a posteriori analyses. The first stage is related to the degree of information and knowledge of the case. The second stage is dependent on the conditional probability for the presence of image signs of the disease and it is thus directly dependent on the sensitivity and specificity of the exam. The third stage is dependent of the previous stages, that in the simplest case can be expressed in function of the odds or likelihood ratios. These three stages allow to reach a decision about the usefulness of a given exam and they orient the questions that a given image may answer. They also orient the research on image analysis for an adequate decision making, minimizing diagnostic uncertainty (Rev Méd Chile 2003; 131: 553-61).
author	Canals L.,Mauricio
author_facet	Canals L.,Mauricio
author_sort	Canals L.,Mauricio
title	Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
title_short	Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
title_full	Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
title_fullStr	Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
title_full_unstemmed	Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
title_sort	bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana
publisher	Sociedad Médica de Santiago
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872003000500012
work_keys_str_mv	AT canalslmauricio basescuantitativasdelanalisisdeimagenesmedicasinformacioneinferenciabayesiana
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Bases cuantitativas del análisis de imágenes médicas: información e inferencia bayesiana

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