SAR of a birdcage coil with variable number of rungs at 300 MHz

Martin, R.; Vázquez, José Francisco Durán; Marrufo, O.; Solís, S.; Osorio, Alexander; Rodrı́guez, A. O.

doi:10.1016/j.measurement.2016.01.013

Cited by 6 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SAR defines the amount of deposited energy during MRI exams and relates directly to the heating of the tissue under examination. [9][10][11][12] There is a variety of different EPT approaches that have been recently published as shown in the review work. 1 A large group of these approaches are derivative based and stem from the Helmholtz equation for magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transceive phase corrected 2D contrast source inversion‐electrical properties tomography

Stijnman

Mandija

Fuchs

et al. 2020

Magnetic Resonance in Med

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the conductivity and permittivity are important in the field of MR safety, where they are used to compute the specific absorption rate (SAR). The SAR defines the amount of deposited energy during MRI exams and relates directly to the heating of the tissue under examination 9‐12 …”

Section: Introductionmentioning

confidence: 99%

Transceive phase corrected 2D contrast source inversion‐electrical properties tomography

Stijnman

Mandija

Fuchs

et al. 2020

Magnetic Resonance in Med

View full text Add to dashboard Cite

show abstract

Comparison of 12 Quadrature Birdcage Coils with Different Leg Shapes at 9.4 T

Wen

2017

Appl Magn Reson

View full text Add to dashboard Cite

A theoretical and experimental investigation on a volume coil with slotted end-rings for rat MRI at 7 T

Solis-Najera

Ruiz

Martin

et al. 2023

Magn Reson Mater Phy

View full text Add to dashboard Cite

Objective A volume coil with squared slots-end ring was developed to attain improved sensitivity for imaging of rat’s brain at 7 T. Material and Methods The principles of the high cavity resonator for the low-pass case and the law of Biot-Savart were used to derive a theoretical expression of $$B_1/i$$ B 1 / i . The slotted-end ring resonator showed a theoretical 2.22-fold sensitivity improvement over the standard birdcage coil with similar dimensions. Numerical studies were carried out for the electromagnetic fields and specific absorption rates for our coil and a birdcage coil loaded with a saline-filled spherical phantom and a digital brain of a rat. Results An improvement of the signal-to-noise ratio (SNR) can be observed for the slotted volume coil over the birdcage regardless of the load used in the electromagnetic simulations. The specific absorption rate simulations show a decrement for the digital brain and quite similar values with the saline solution phantom. Phantom and rat’s brain images were acquired at 7 T to prove the viability of the coil design. The experimental noise figure of our coil design was four times less than the standard birdcage with similar dimensions, which showed a 44.5% increase in experimental SNR. Discussion There is remarkable agreement among the theoretical, numerical and experimental sensitivity values, which all demonstrate that the coil performance for MR imaging of small rodents can be improved using slotted end-rings.

show abstract

SAR of a birdcage coil with variable number of rungs at 300 MHz

Cited by 6 publications

References 51 publications

Transceive phase corrected 2D contrast source inversion‐electrical properties tomography

Transceive phase corrected 2D contrast source inversion‐electrical properties tomography

Comparison of 12 Quadrature Birdcage Coils with Different Leg Shapes at 9.4 T

A theoretical and experimental investigation on a volume coil with slotted end-rings for rat MRI at 7 T

Contact Info

Product

Resources

About