fCal spatial calibration using customized N-wire pattern

[yichengggg]

Hello,

I am trying to calibrate our curvilinear probe using the fCal 3.0 phantom.
We wired the phantom following your N-wire suggestion, and we have a pattern of 2 "N"s on a same level (shows below) but seems like fCal cannot correctly recognize the lines (which are represented with 6 points) giving issues with spatial calibration.
We are wondering if this wiring pattern is recommended within the phantom? Or should we specify the Type parameter in the configuration file under <PhantomDefinition>? We see options of "Triple-N" and "Multiple-N" but now sure if there is anything to do with this.

Thank you!