The source code of Bisel is available under a BSD-like license.


See J. Magn. Reson. XXX (2007) XXX - XXX.
Bisel allows to predict the amount of anti-phase magnetization that is created by a pair of biselective refocusing pulses that are embedded in a DPFGSE experiment, starting from in-phase magnetization. It also predicts the amount of anti-phase magnetization that if preserved if the experiment starts with anti-phase magnetization. The calculation is performed on an AX spin system.

See J. Magn. Reson. 187 (2007) 193 - 198.
Bisel also calculates the λ parameter of a biselective refocusing pulse as a function of the coupling constant.


The bisel program

bisel pulse_file_name pulse_length(s) coupling_constant(Hz) [Delta_nu(Hz) delta_init(s) delta_final(s) n_delta]]


bisel pulse_file_name pulse_length(s) coupling_constant_init(Hz) coupling_constant_final(Hz) n_J 999]]

Bisel writes the welcome, final and eventual error messages on the standard error flow.
It writes the useful information on standard output.
The output file contains the command line arguments and the calculated pulse parameters, written as comment lines. If a simulation is requested, the first column contains the difference between the actual additional delay value and the initial one. The second column contains the corresponding transmission factor, from in-phase magnetization to anti-phase magnetization, and vice versa. The third column indicates the amount of remaining anti-phase magnetization, when the experiment starts from anti-phase magnetization.

Jean-Marc Nuzillard

February 6th 2007