Retrobulbar magnetic resonance angiography using binomial off‐resonant rectangular (BORR) pulse

Abstract

We have successfully revealed orbital vessels in retrobulbar space for the first time using MRA, by using the BORR pulse method. With a clear depiction of the vasculature without the need for contrast enhancement, our method has the potential to provide important diagnostic information for ocular vascular diseases.

Flexible water excitation for fat‐free MRI at 3T using lipid insensitive binomial off‐resonant RF excitation (LIBRE) pulses

“…Therefore, it may not easily be applicable to 2D methods or 3D approaches in which reduced volumetric coverage is desired. The property of the LIBRE pulse to flexibly adjust some of its parameters, with effective total RF durations as low as 1.4 ms, emphasizes an important difference with the BORR implementation with a total RF duration of 2.6 ms and 3.2 ms . In this study, we have not explored RF pulse durations below 1.4 ms, but we foresee that this may be possible.…”

“…Recently BORR was proposed, a method in which two consecutive adjacent rectangular pulses with a 180° phase shift are applied (21). This method shows large suppression bandwidths for fat signals in the numerical simulations, and was applied in the human breast and eye at 3 T (21,22), but relatively lengthy RF pulse durations of 2.6 ms and 3.2 ms were used.…”