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Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
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Volume calculation often begins with simple geometric solids. For example, the volume of a rectangular box is obtained by multiplying the area of its base by its height. This straightforward approach relies on the fact that the cross-sectional area of the box remains constant throughout its length. Many real-world objects, however, do not have uniform cross-sections, and their volumes cannot be determined using elementary geometric formulas.To address this limitation, the Slicing Method...
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Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
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Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model
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Optimizado de doble fuente de doble energía computarizada tomografía nomograma modelo de integración de la

Qian Wang1,2, Yi Xin1,2, Yongli Feng1,2

  • 1Department of Radiology, The First People's Hospital of Lianyungang, Lianyungang, China.

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Resumen
Este resumen es generado por máquina.

Un nomograma de tomografía computarizada de doble energía de doble fuente (DS-DECT) predice eficazmente los nódulos tiroideos malignos utilizando características cuantitativas y cualitativas de imágenes. Esta herramienta ayuda a los médicos a distinguir los nódulos benignos de los malignos, mejorando la gestión del paciente.

Palabras clave:
El nódulo de tiroides es un nódulo de tiroides.Tomografía computarizada de doble energía (DECT, por sus siglas en inglés)El nomograma es el nomograma.

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Área de la Ciencia:

  • Radiología Radiología.
  • Oncología Oncología.
  • Imágenes médicas de imágenes médicas.

Sus antecedentes:

  • El diagnóstico preoperatorio preciso de los nódulos tiroideos es esencial para el tratamiento personalizado.
  • Distinguir entre nódulos benignos y malignos tiene un impacto en las estrategias de manejo del paciente.

Objetivo del estudio:

  • Desarrollar un modelo de nomograma basado en tomografía computarizada de doble energía de doble fuente (DS-DECT).
  • Para predecir el riesgo de cáncer maligno en nódulos tiroideos.

Principales métodos:

  • Se incluyeron un total de 263 pacientes con 288 nódulos tiroideos.
  • Se analizaron las características radiológicas y los parámetros cuantitativos del DS-DECT.
  • Se construyó un nomograma utilizando regresión logística y se validó internamente.

Principales resultados:

  • Los predictores independientes de la malignidad incluyeron la concentración de yodo, la concentración de yodo normalizada, el número atómico efectivo, la interrupción del borde de la tiroides y el desenfoque mejorado.
  • El nomograma logró un alto rendimiento diagnóstico con AUC de 0.932 (entrenamiento) y 0.908 (validación).
  • El modelo demostró un buen ajuste y calibración, con una utilidad clínica significativa demostrada por el análisis de la curva de decisión.

Conclusiones:

  • El nomograma desarrollado es una herramienta eficaz para distinguir los nódulos tiroideos benignos de los malignos.
  • Integra parámetros DS-DECT cuantitativos multifásicos y características de imágenes cualitativas.
  • El modelo apoya a los médicos de imagen en el diagnóstico preoperatorio y el manejo del paciente.