hold your breath and you really would like to do this fast enough you don't have to hold your breath at all okay so just a very primitive explanation of how we take our measurements in MRI imaging and really the physics is not so important but it's just want to highlight why this is so slow what we typically do is we traverse our measurement space in which we take measurements which is called the K space and we have to traverse it sequentially for a number of reasons which I don't really want to go into too much detail