Double- Angle method use to mapping B1

Posted by gomis90 on Sep 23, 2014; 10:48am
URL: http://imagej.273.s1.nabble.com/Double-Angle-method-use-to-mapping-B1-tp5009722.html

Hi,

I have a problems with imageJ:

1) I got 2 NMR`s images (M1 and M2) doing with diffrent FA (flip angle). Now I must to divide them: M2/(2*M1) and get NEWimage. Image calculator allows to do M2/M1 only. How to do M2/(2*M1)?

2) after M2/(2*M1) I should use this function: arccos(M2/(2*M1)). Cos(x) function etc. is working well but acos and asin don`t work. Where should I written this function? Maybe some plugins allow it.

3) at the end I should every pixel from NEWimage changes at previous result: arccos(M2/(2*M1)). How to do it?

Please help me. Thanks