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Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Assessment of pulmonary nodules using [18F]-FDG PET/CT in deep inspiration breat...
Journal Information
Vol. 44. Issue 2.
(March - April 2025)
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4
Vol. 44. Issue 2.
(March - April 2025)
Original Article
Assessment of pulmonary nodules using [18F]-FDG PET/CT in deep inspiration breath-hold
Valoración de los nódulos pulmonares mediante [18F]-FDG PET/TC en inspiración profunda mantenida
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4
M.S. Casallas Cepeda
Corresponding author
Miquele7@gmail.com

Corresponding author.
, S. Salcedo Córtes, I. Gómez Fernández, J. Orcajo Rincón, L. Reguera Berenguer, E.J. Ardila Manjarrez, J.J. Ardila Mantilla, V. Castillo Morales, J. Gúzman Cruz, D. Zamudio Rodríguez, A. Marí Hualde, J.E. Montalvá Pastor, S. Álvarez Lara, J.C. Alonso Farto
Nuclear Medicine, Hospital General Universitario Gregorio Marañón, 28097 Madrid, Spain
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Tables (5)
Table 1. Demographic data.
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Table 2. Contingency table of [18F]-FDG PET/CT in deep held inspiration.
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Table 3. Mean values of SUVmax in free-breathing and in deep held inspiration.
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Table 4. Performance of [18F]-FDG PET/CT in deep held inspiration.
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Table 5. Evaluation of solitary pulmonary nodules using [18F]-FDG PET/CT imaging historical cohort.
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Abstract

The characterization of pulmonary nodules (PN) is a primary indication for [18F]-FDG PET/CT. However, respiratory movements hinder this characterization, especially for PN located in the lower lobes. Various methods have been developed to improve image resolution.

Objective

Our objective was to compare the diagnostic efficacy of [18F]-FDG PET/CT in deep inspiration breath-hold (DIBH) versus free-breathing corrected by software, in the evaluation of PN.

Methods

We prospectively analyzed 51 patients to assess PN using [18F]-FDG PET/CT in DIBH and free-breathing corrected by software. A total of 84 nodules with an average size of 10 mm were analyzed, with pathological anatomy or medical treatment decide by a multidisciplinary tumor board used as reference.

Results

A total of 84 PN were evaluated, comparing those in DIBH versus free-breathing, finding statistically significant differences in SUVmax values P(< 0.05) (mean SUVmax 3.7 in free-breathing vs. 5.33 in DIBH). When analyzed by location in lobes, we did not find statistically significant differences, though there was a trend towards higher SUVmax values in the lower lobes. [18F]-FDG PET/CT in DIBH showed high sensitivity (95%) and negative predictive value (NPV) (92%), indicating it may be a promising tool for PN characterization.

Conclusions

The acquisition of [18F]-FDG PET/CT in DIBH significantly improves the sensitivity and diagnostic efficacy in the assessment of PN. Although no statistically significant differences were found based on location, there is a potential benefit for the lower lobes. These findings could support its use in clinical practice.

Keywords:
PET in deep held inspiration
PET in free-breathing
Pulmonary nodule
Respiratory gating
Resumen

La caracterización de los nódulos pulmonares (NP) es una indicación principal del [18F]-FDG PET/TC. Sin embargo, los movimientos respiratorios dificultan esta caracterización, en especial la de los NP localizados en lóbulos inferiores (LLII). Existen varios métodos que han mejorado la resolución de las imágenes.

Objetivo

Nuestro objetivo fue comparar la eficacia diagnóstica de [18F]-FDG PET/TC en inspiración profunda mantenida (IPM) frente a la respiración libre corregida por software, para evaluar los NP.

Métodos

Analizamos prospectivamente 51 pacientes para evaluar NP mediante [18F]-FDG PET/TC en IPM y en inspiración libre corregidas por software. Se analizaron 84 nódulos con un tamaño medio de 10 mm y se usó como referencia la anatomía patológica o tratamiento médico decidio por un comité de tumores multidisciplinar.

Resultados

Se valoraron 84 NP comparando aquellos en IPM versus respiración libre encontrando diferencias estadísticamente significativas en los valores de SUVmax P(< 0,05) (media SUVmax 3.7 en inspiración libre vs 5,33 IPM). Al analizar por localización en lóbulos no encontramos diferencias estadísticamente significativas, pero si una tendencia a aumentar los valores del SUVmax en LLII. El [18F]-FDG PET/TC en IPM mostró una sensibilidad (95%) y un valor predictivo negativo (VPN) (92%) alto, pudiendo ser una herramienta prometedora para la caracterización de NP.

Conclusiones

La adquisición de [18F]-FDG PET/TC en IPM mejora significativamente la sensibilidad y eficacia diagnóstica en la valoración de NP. Aunque no se encontraron diferencias estadísticas significativas según la localización, hay un beneficio potencial en los LLII. Hallazgos que podrían respaldar su uso en la práctica clínica.

Palabras clave:
PET en inspiración profunda mantenida
PET en inspiración libre
Nódulo pulmonar
Gating respiratorio

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