qMRLab in qmt_spgr Method has some Error when I do the data fitting.

Question

Ti Wu 2020-10-11

Hello,

We are trying to reproduce the DATA from "Quantitative Magnetization Transfer in In Vivo Healthy Human Skeletal Muscle at 3T".

So the Options Panel we use 1, 2, 5, 10, 20, 50, 100 kHz Offset.

Gaussian Shape, 375Hz Bandwidth, 200 # of MT Pulse, Tmt = 0.0077s, Ts = 0.0018s, Tp = 0.0015s, Tr = 0.079s, TR = 0.09s.

I put MTdata, R1map, B1map, and didn't put Mask.

However, it didn't work.

It has some Error.

So I wonder if someone knows what happened when I fit data.

Thank you.

The Error is here:

Error in voxel [1,1,1]: Objective function is returning undefined values at initial point. lsqcurvefit cannot continue.

Unrecognized function or variable 'tempFit'.

Error in FitData (line 156)

if isempty(tempFit), Fit=[]; return; end

Error in qMRLab>FitGo_FitData (line 406)

FitResults = FitData(data,Model,1);

Error in qMRLab>FitGO_Callback (line 388)

FitGo_FitData(hObject, eventdata, handles);

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in qMRLab (line 41)

gui_mainfcn(gui_State, varargin{:});

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)qMRLab('FitGO_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.

TI WU