Nasion to Frankfort horizontal plane:Len:Pt:Skull:Qn:XR.measured
nasion to frankfort horizontal plane:len:pt:skull:qn:xr.measured
Nasion to Frankfort horizontal plane:Len:Pt:Skull:Qn:XR.measured
nasion to frankfort horizontal plane:len:pt:skull:qn:xr.measured