‘Pulse-acquire’ method for obtaining the guidewire coupling modes of a PTx transmit array

Felipe Godinez; Joseph Vilmos Hajnal; Greig Scott; Ronald Mooiweer; Shaihan Jalal Malik

‘Pulse-acquire’ method for obtaining the guidewire coupling modes of a PTx transmit array

Felipe Godinez, Joseph Vilmos Hajnal, Greig Scott, Ronald Mooiweer, Shaihan Jalal Malik

Stanford University

Research output: Chapter in Book/Report/Conference proceeding › Meeting abstract › peer-review

Abstract

A method for measuring relative coupling between elements of a parallel transmit (PTx) array and conductive structures
such as guidewires or braided catheters. The method relies on strong local enhancement of B1 fields close to conductors due to induced currents. Data acquired from single pulse-acquire measurements using very low flip angles is hence dominated by these induced current contributions. Coupling matrices for N-channel arrays can therefore be estimated using only N pulses; it is demonstrated that these are similar to those obtained from dedicated current sensors.

Original language	English
Title of host publication	ISMRM
Place of Publication	Honolulu HI
Publication status	Published - 2017

Cite this

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title = "{\textquoteleft}Pulse-acquire{\textquoteright} method for obtaining the guidewire coupling modes of a PTx transmit array",

abstract = "A method for measuring relative coupling between elements of a parallel transmit (PTx) array and conductive structuressuch as guidewires or braided catheters. The method relies on strong local enhancement of B1 fields close to conductors due to induced currents. Data acquired from single pulse-acquire measurements using very low flip angles is hence dominated by these induced current contributions. Coupling matrices for N-channel arrays can therefore be estimated using only N pulses; it is demonstrated that these are similar to those obtained from dedicated current sensors.",

author = "Felipe Godinez and Hajnal, {Joseph Vilmos} and Greig Scott and Ronald Mooiweer and Malik, {Shaihan Jalal}",

year = "2017",

language = "English",

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TY - CHAP

T1 - ‘Pulse-acquire’ method for obtaining the guidewire coupling modes of a PTx transmit array

AU - Godinez, Felipe

AU - Hajnal, Joseph Vilmos

AU - Scott, Greig

AU - Mooiweer, Ronald

AU - Malik, Shaihan Jalal

PY - 2017

Y1 - 2017

N2 - A method for measuring relative coupling between elements of a parallel transmit (PTx) array and conductive structuressuch as guidewires or braided catheters. The method relies on strong local enhancement of B1 fields close to conductors due to induced currents. Data acquired from single pulse-acquire measurements using very low flip angles is hence dominated by these induced current contributions. Coupling matrices for N-channel arrays can therefore be estimated using only N pulses; it is demonstrated that these are similar to those obtained from dedicated current sensors.

AB - A method for measuring relative coupling between elements of a parallel transmit (PTx) array and conductive structuressuch as guidewires or braided catheters. The method relies on strong local enhancement of B1 fields close to conductors due to induced currents. Data acquired from single pulse-acquire measurements using very low flip angles is hence dominated by these induced current contributions. Coupling matrices for N-channel arrays can therefore be estimated using only N pulses; it is demonstrated that these are similar to those obtained from dedicated current sensors.

M3 - Meeting abstract

BT - ISMRM

CY - Honolulu HI

ER -

‘Pulse-acquire’ method for obtaining the guidewire coupling modes of a PTx transmit array

Abstract

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