section "Step 2 : find trachea"
+option "skipslices" - "Number of slices to skip before searching seed" int no default="0"
option "upperThresholdForTrachea" - "Initial upper threshold for trachea" double no default="-900"
option "multiplierForTrachea" - "Multiplier for the region growing" double no default="5"
option "thresholdStepSizeForTrachea" - "Threshold step size" int no default="64"