FASTMAP - Spherical ROI

BUTTONS:

1: diam.=		Shows and SETS the current values of L which determines 
			the extent of polynomial fitting in a sphere of diam. L
2: linear fit		Fits to the projections only 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