Related Experiment Video
Updated: Sep 20, 2026

How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression
Published on: January 23, 2017
A method for the design of MRI radiofrequency coils based on triangular and pulse basis functions
Desmond Yau1, Ben Lawrence, Stuart Crozier
1The Centre for Magnetic Resonance, University of Queensland, St. Lucia, Brisbane, Qld 4072, Australia.
Abstract:
This paper presents a numerical technique for the design of an RF coil for asymmetric magnetic resonance imaging (MRI) systems. The formulation is based on an inverse approach where the cylindrical surface currents are expressed in terms of a combination of sub-domain basis functions: triangular and pulse functions. With the homogeneous transverse magnetic field specified in a spherical region, a functional method is applied to obtain the unknown current coefficients. The current distribution is then transformed to a conductor pattern by use of a stream function technique. Preliminary MR images acquired using a prototype RF coil are presented and validate the design method.
Related Concept Videos
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
Magnetic Field Of A Current Loop
Magnetic Resonance Imaging
Rectangular and Triangular Pulse Function
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
Polar Coordinates: Problem Solving

