Diffusion Weighted Arterial Spin Labelling uses a pair of bipolar diffusion gradients surrounding a spin echo pulse to image signal in the intravascular and extravascular compartments. We propose moving these gradients to a single sided gradient, reducing Δ and changing where the change to the extravascualar signal starts. Our results show that the ratio has changed from b = 50 to b = 300 s/mm2 for our new single sided sequence. This can give us more information on the intravascular signal, helping to improve the probing of blood brain barrier permeability.
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