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Vol. 63. Issue 6.
Pages 469-475 (November - December 2021)
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Vol. 63. Issue 6.
Pages 469-475 (November - December 2021)
Original articles
Concordance of the ACR TI-RADS
Concordancia del TIRADS-ACR
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C.M. González Vásqueza,
Corresponding author
, J.A. Muñoz Duránb, S. Isaza Zapatab, J.F. González Londoñob, V. García Gómeza
a Radiólogo, Hospital Pablo Tobón Uribe, Antioquia, Colombia
b Residente de Radiología, Universidad CES, Antioquia, Colombia
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Tables (3)
Table 1. ACR TI-RADS.
Table 2. Intraobserver variability.
Table 3. Interobserver variability.
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Abstract
Background

Ultrasonography (US) is the method of choice for evaluating thyroid nodules. In 2017, the American College of Radiology (ACR) created a classification system based on US characteristics. For the system to be adopted, it must be reproducible.

Objectives

To determine the intraobserver and interobserver variability of the ACR TI-RADS.

Methods

Cross-sectional study; three radiologists with different levels of experience used the ACR TI-RADS to classify 100 nodules on two occasions one month apart, and we calculated the intraobserver and interobserver variability.

Results

Regarding intraobserver variability, the first radiologist had nearly perfect concordance for composition, echogenicity, shape, and margins and substantial concordance for echogenic foci; the second radiologist had nearly perfect concordance for composition, echogenicity, shape, and margins and substantial concordance for echogenic foci, and the third radiologist had nearly perfect concordance for composition, echogenicity, and shape and substantial concordance for margins and echogenic foci. The interobserver concordance was calculated for the two readings; the concordance was substantial except for shape in the first reading and for echogenicity and margins in the second reading, which had moderate concordance.

Conclusions

The ACR TI-RADS classification system is reproducible.

Keywords:
Thyroid
Thyroid nodule
ACR TI-RADS
Ultrasonography
Risk of malignancy
Resumen
Introducción

La ecografía es el método de elección para evaluar el nódulo tiroideo. En 2017, el American College of Radiology (ACR) creó un sistema de clasificación basado en características ecográficas. Para que el sistema se pueda adoptar, debe ser reproducible.

Objetivos

Determinar la variabilidad intraobservador e interobservador del TIRADS-ACR.

Metodología

Estudio transversal; 100 nódulos fueron clasificados de manera independiente por tres radiólogos con diferente experiencia utilizando el TIRADS-ACR. Se clasificaron los nódulos en dos oportunidades con intervalo de 1 mes. Se obtuvo la variabilidad interobservador e intraobservador.

Resultados

La variabilidad intraobservador fue la siguiente: primer evaluador: concordancia casi perfecta para composición, ecogenicidad, forma y bordes y concordancia sustancial para focos ecogénicos. Segundo evaluador: concordancia casi perfecta para composición, ecogenicidad, forma y bordes y concordancia sustancial para focos ecogénicos. Tercer evaluador: concordancia casi perfecta para composición, ecogenicidad, forma y concordancia sustancial para focos ecogénicos y bordes. Las concordancias interobservador se obtuvieron en las dos evaluaciones. Los resultados estuvieron en categoría de concordancia sustancial excepto para forma en la primera evaluación y para ecogenicidad y bordes en la segunda evaluación que tuvieron concordancia moderada.

Conclusiones

El sistema de clasificación TIRADS-ACR es reproducible.

Palabras clave:
Tiroides
Nódulo tiroideo
TIRADS-ACR
Ecografía
Riesgo de malignidad

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