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Optimización de la radiografía de tórax: Identificación del kV óptimo para la calidad de imagen en un estudio de
Ioannis Antonakos1, Kyriakos Kokkinogoulis1, Maria Giannopoulou1
1Department of Applied Medical Physics, Medical School, National and Kapodistrian University of Athens, 124 62 Athens, Greece.
Journal of imaging
|January 27, 2026
Resumen
La optimización de la radiografía de tórax implica equilibrar la calidad de imagen y la dosis de radiación. Los voltajes de tubo intermedios funcionan mejor para pacientes promedio, mientras que se necesitan voltajes más altos para pacientes obesos, según los hallazgos del estudio de fantoma.
Área de la Ciencia:
- Imágenes Médicas
- Física Radiológica
Sus antecedentes:
- La radiografía de tórax es un examen de diagnóstico por imagen común.
- La optimización de los parámetros de adquisición es crucial para equilibrar la calidad de imagen y la dosis de radiación.
Objetivo del estudio:
- Evaluar cuantitativamente los ajustes de adquisición de la radiografía de tórax utilizando un fantoma.
- Evaluar el impacto del voltaje del tubo y el grosor simulado del paciente en la calidad de imagen y la dosis de radiación.
Principales métodos:
- Se utilizó un sistema de radiografía digital AGFA DR 600 con un fantoma Leeds TOR 15FG.
- Se midió la calidad de imagen utilizando la relación señal-ruido (SNR) y la relación contraste-ruido (CNR).
- Se estimó la exposición a la radiación a través de la dosis de superficie de entrada (ESD) en diferentes grosores de PMMA y voltajes de tubo.
Principales resultados:
- El rendimiento normalizado por dosis favoreció voltajes de tubo intermedios para grosores delgados/promedio.
- Se necesitaron voltajes de tubo más altos para grosores equivalentes a obesos para mantener la calidad de imagen.
- La calidad de imagen y la dosis se vieron significativamente influenciadas por la interacción del voltaje del tubo y el grosor del fantoma.
Conclusiones:
- Ajustes modestos en la selección del voltaje del tubo pueden mejorar el equilibrio entre calidad de imagen y dosis de radiación en la radiografía de tórax.
- Los hallazgos basados en fantomas requieren validación con imágenes clínicas y estudios de observadores antes de alterar la práctica rutinaria.
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