FASTMAP - General ROI

BUTTONS:

1: View ROI	Shows the current values of L for x,y,z and xy, yx etc.
		which determines the extent of polynoomial fitting
2: linear fit	Fits to the projections onyl using linear regression and 
		shows PROPOSED changes in shim values.
3: quadr. fit	Fits to projections using quadratic polynomial and 
		shows PROPOSED changes in shim values.
4: Calc. shims	Calculates and applies new shim values, stores old 
		values and new values to disk and updates values in 
		current experiment WITHOUT updating DAC
5: Update DAC's	Updates DAC values with values CURRENTLY present 
		in active experiment
6: Return	Return to FASTMAP main menu