I have a question about how I could compute the area (duration and amplitude) for the phase encoding gradient in a typical MRI gradient echo sequence. So, let us assume that my field of view in the phase-encode direction is 20 cms and I have a k-space matrix of size 256. From the tutorial here, I can see that the k-space spacing is $1/20e-3$ per meter. Let us also assume that the maximum gradient strength I can achieve is 10mT/m.
I am now stuck and not sure how I can compute the area that I need under the phase encode area. I am aware that the area will change at each phase encoding step and at least from the pulse sequence diagrams that I see for a GE sequence, it seems that the amplitude is adjusted (going for negative max to positive max) and the gradient time is kept constant during each phase encode step.
However, I am at a loss as to how to compute this area?