How to simulate HASTE sequence with matlab

Hi everyone

I need to use Matlab to simulate T2 effect in k-space and compare images when T2 of tissues are 60, 120, 180 and 240 ms with effective TE of 20ms, ESP (echo-spacing) of 4 ms and ETL (echo-train length) of 96 (matrix 192x192). And compare simulation results to the original image of 'phantom'.

Could you please help me on that

Thanks

Answer 1

[Kartik Saxena]

Hi,

I understand that you want to simulate the T2 effect in k-space and compare images with different T2 values of tissues.

We will need to consider the T2 decay during the acquisition of each echo in a multi-echo sequence. For this simulation, we will assume that the k-space data is acquired in an echo train with an echo train length (ETL) of 96 and an echo spacing (ESP) of 4 ms. The effective echo time (TE) is 20 ms.

We will use the MATLAB built-in function 'phantom' to create the original image, which represents a Shepp-Logan phantom often used in MRI simulations. We will then simulate the T2 decay effect on each echo and reconstruct the images to compare the effect of different T2 values.

For more information on the 'phantom' function and image processing in MATLAB, you can refer to the following documentation:

• phantom: https://www.mathworks.com/help/images/ref/phantom.html
• Image display: https://www.mathworks.com/help/images/ref/imshow.html