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Método de aprendizaje profundo impulsado por el modelo de inversión no lineal para imágenes de resonancia magnética

Yue Sun1, Hongyu Guo1, Mingyu Li1

  • 1Department of Biomedical Engineering, Shenyang University of Technology, Shenyang, China.

Quantitative imaging in medicine and surgery
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Resumen

Un nuevo modelo de aprendizaje profundo de inversión de susceptibilidad no lineal (NSIDL) mejora la precisión del mapeo cuantitativo de susceptibilidad (QSM) y reduce los artefactos. Este enfoque avanzado de aprendizaje profundo ofrece una mejor calidad de imagen para diversas afecciones cerebrales.

Palabras clave:
Mapeo cuantitativo de la susceptibilidad (QSM, por sus siglas en inglés)Aprendizaje profundo basado en modelos.Inversión no lineal de la susceptibilidad (NSI)

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Área de la Ciencia:

  • Imágenes médicas de imágenes médicas.
  • La inteligencia artificial en la medicina.
  • La neurociencia es la neurociencia.

Sus antecedentes:

  • El mapeo cuantitativo de la susceptibilidad (QSM) es vital para evaluar las condiciones cerebrales.
  • Los métodos convencionales de QSM sufren de artefactos y ruido.
  • Los métodos de aprendizaje profundo existentes para QSM a menudo carecen de limitaciones físicas.

Objetivo del estudio:

  • Desarrollar un enfoque de aprendizaje profundo basado en modelos para QSM.
  • Mejorar la precisión cuantitativa y suprimir los artefactos en QSM.
  • Hacer cumplir la fidelidad de los datos del modelo dipolo dentro de una red de aprendizaje profundo.

Principales métodos:

  • Propuso un modelo de aprendizaje profundo de inversión de susceptibilidad no lineal (NSIDL).
  • Integró un modelo de inversión de susceptibilidad no lineal (NSI) en una red neuronal convolucional.
  • Descenso de gradiente proximal empleado (PGD) para la optimización, entrenado y validado en datos de MRI de orientación múltiple.

Principales resultados:

  • NSIDL logró una precisión cuantitativa superior en los conjuntos de datos de prueba (pendiente = 0,716, R2 = 0,6140).
  • Se demostró una mayor fidelidad de imagen en el conjunto de datos RC-1 con NRMSE y HFEN más bajos, y PSNR más alto.
  • Eficazmente suprimió artefactos en lesiones hemorrágicas y mejoró la claridad de las lesiones de EM en evaluaciones clínicas.

Conclusiones:

  • NSIDL combina un modelo físico no lineal con la regularización basada en datos para mejorar QSM.
  • El método ofrece una sólida supresión de artefactos y mediciones de alta fidelidad.
  • NSIDL muestra un potencial significativo para aplicaciones clínicas precisas de QSM.