Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Echo01:06

Echo

949
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
949
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

48.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
48.4K
Planar Rigid-Body Motion01:22

Planar Rigid-Body Motion

1.0K
Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
1.0K
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

9.5K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
9.5K
Modified Boxplots00:57

Modified Boxplots

10.9K
A standard box and whisker plot informs us about the spread of the data in a given sample. One can identify the minimum value, maximum value, first quartile value, second quartile or median value, and third quartile.
However, the box plot does not tell the reader about outliers - values that lie far from the center of the data. We can modify the standard box and whisker plot to identify the outliers and visualize the actual spread of the data in a sample.
Initially, we calculate the adjusted...
10.9K
Base Excision Repair01:54

Base Excision Repair

26.3K
One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
26.3K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

GABAergic Modulation of Brain Function During Prosaccade and Antisaccade Eye Movements: Evidence From Ultra-High-Field fMRI.

Human brain mapping·2026
Same author

Design of an 8-Channel Transmit 32-Channel Receive 11.7T Head Coil and Evaluation of SNR Gains.

Magnetic resonance in medicine·2026
Same author

Prospective Head Motion Correction in T1- and T2-Weighted Long Echo Train Sequences Using Servo Navigation.

Magnetic resonance in medicine·2026
Same author

Calibration-Free GRAPE pTx Pulses for Homogeneous Spatial-Selective Excitation at 7T.

Magnetic resonance in medicine·2026
Same author

Motion- and Field-Robust Mesoscopic Whole-Brain <math><semantics><mrow><msubsup><mi>T</mi> <mn>2</mn> <mo>*</mo></msubsup></mrow> <annotation>$$ {T}_2^{\ast } $$</annotation></semantics></math> -Weighted Imaging at 7 and 11.7 T Using Servo Navigation.

Magnetic resonance in medicine·2026
Same author

Whole-brain meso-vein imaging in living humans using fast 7-T MRI.

Science advances·2026

Video Experimental Relacionado

Updated: Jan 28, 2026

Author Spotlight: Optimized Lung MRI Protocol with Computationally Efficient Reconstruction Methods
05:07

Author Spotlight: Optimized Lung MRI Protocol with Computationally Efficient Reconstruction Methods

Published on: September 6, 2024

740

Imagenología de Tiempo de Vuelo Basada en Eco-Planar Utilizando una Trayectoria Flyback Intercalada Modificada

Simon Blömer1,2, Tony Stöcker1,2, Rüdiger Stirnberg1

  • 1German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.

Magnetic resonance in medicine
|January 27, 2026
PubMed
Resumen

Un nuevo método modificado de flyback intercalado (miFB) reduce los artefactos de flujo en los escaneos de imagen por eco-planar (EPI). Esta técnica mejora significativamente la calidad de la imagen y reduce a la mitad el tiempo de adquisición para escaneos de RM más rápidos.

Palabras clave:
EPI 3D7Timagen por eco-planarartefactos de flujoangiografía por resonancia magnética

Más Videos Relacionados

Author Spotlight: Exploring Neural Correlates of Defensive Behaviors in Fear Learning and Extinction
04:03

Author Spotlight: Exploring Neural Correlates of Defensive Behaviors in Fear Learning and Extinction

Published on: December 15, 2023

1.4K
Echo Particle Image Velocimetry
16:31

Echo Particle Image Velocimetry

Published on: December 27, 2012

15.1K

Videos de Experimentos Relacionados

Last Updated: Jan 28, 2026

Author Spotlight: Optimized Lung MRI Protocol with Computationally Efficient Reconstruction Methods
05:07

Author Spotlight: Optimized Lung MRI Protocol with Computationally Efficient Reconstruction Methods

Published on: September 6, 2024

740
Author Spotlight: Exploring Neural Correlates of Defensive Behaviors in Fear Learning and Extinction
04:03

Author Spotlight: Exploring Neural Correlates of Defensive Behaviors in Fear Learning and Extinction

Published on: December 15, 2023

1.4K
Echo Particle Image Velocimetry
16:31

Echo Particle Image Velocimetry

Published on: December 27, 2012

15.1K

Área de la Ciencia:

  • Imagen por Resonancia Magnética (IRM)
  • Física Médica

Sus antecedentes:

  • Los artefactos de flujo, como la diafonía y la caída de señal, son comunes en la imagen por eco-planar (EPI) debido a las polaridades de lectura alternas.
  • Estos artefactos pueden degradar la calidad de la imagen y complicar la interpretación de los escaneos de RM, particularmente en aplicaciones como la angiografía por resonancia magnética de tiempo de vuelo (TOF-MRA).

Objetivo del estudio:

  • Introducir un enfoque modificado de flyback intercalado (miFB) para mitigar los artefactos de flujo en la EPI.
  • Mantener una alta eficiencia de adquisición mientras se reducen los artefactos.
  • Permitir escaneos de angiografía por resonancia magnética (ARM) más rápidos.

Principales métodos:

  • Reconstrucción separada de los ecos impares y pares en la EPI 3D.
  • Adquisición de las líneas faltantes utilizando disparos intercalados con polaridad invertida y un lóbulo de gradiente adicional.
  • Combinación del enfoque miFB con suavizado del momento del gradiente.
  • Comparación con el método de eco dual intercalado con aceleración (IDEA) en fantomas y escaneos in vivo a 7 Tesla.

Principales resultados:

  • Reducción significativa de la diafonía y la caída de señal en comparación con la EPI convencional.
  • Calidad de imagen comparable a las adquisiciones no EPI.
  • Tiempo de adquisición reducido aproximadamente en un 50%.

Conclusiones:

  • El enfoque miFB reduce eficazmente los artefactos de flujo en la EPI.
  • Este método permite disminuir los tiempos de adquisición en TOF-MRA.
  • miFB ofrece una solución prometedora para ARM basada en EPI eficiente y de alta calidad.