Palabras clave
Tomografía computarizada de haz cónico; Tomografía computarizada volumétrica; Unidades Hounsfield; valores de gris.
Cómo citar
Resumen
La tomografía computarizada de haz cónico (CBCT, por sus siglas en inglés) es una técnica de imagen 3D ampliamente usada en diagnóstico maxilofacial. El valor de densidad en la escala de grises (DEG) es una cifra que corresponde al grado de atenuación de los rayos x del material representado en cada vóxel o unidad estructural de la tomografía. De forma similar, en los sistema de tomografía computarizada de uso médico (CT) el valor de atenuación está estandarizado en las Unidades Hounsfield (UH). Aunque los valores de DEG pueden tener interesantes usos potenciales en el apoyo de diagnóstico en el área dentoalveolar, es importante conocer que los valores UH no son los mismos a los valores DEG, y que los valores de DEG son susceptibles a múltiples factores técnicos durante la adquisición de la tomografía, por lo que se pueden obtener resultados distintos entre equipos y al variar parámetros técnicos en las tomas. Por lo tanto sus valores no deben extrapolarse entre equipos y su uso debe ser cauteloso mientras se realiza mayor investigación específica para cada equipo y para cada protocolo de adquisición.
Citas
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