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40 changes: 22 additions & 18 deletions examples/MVLinac/Field.txt
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
# Field.txt contains specific source and geometry parameters.
# Field.txt contains parameter values for a specific geometry. In this example, the
# beam is collimated to 20 cm x 20 cm at the machine isocenter at 100 cm SAD.
#
# The parameters settings in this file override parameter settings in the files in the
# includeFile statement below and in LinacDefaults.txt.
#
Expand All @@ -18,10 +20,10 @@
# SAD: Source axis distance (distance from nominal source position to isocenter)
# ^IEC_G/RotY_G: IEC gantry rotation angle
# ^IEC_B/RotZ_B: IEC secondary collimator (jaw and MLC) rotation angle
# JawTravelAxis: Direction of jaw travel, along IEC_B axis Xb or Yb
# LeafTravelAxis: Direction of leaf travel, along IEC_B axis Xb or Yb
# ^NegativeFieldSetting: Jaw or MLC leaf position on negative side, projected to isocenter
# ^PositiveFieldSetting: Jaw or MLC leaf position on positive side, projected to isocenter
# Jaw/RotZ: Jaw orientation, dependent on direction of jaw travel along IEC_B
# MLC/RotZ: MLC orientation, dependent on direction of leaf travel along IEC_B
# ^NegativeFieldSetting: Jaw or MLC leaf position on negative side (IEC X1), projected to isocenter
# ^PositiveFieldSetting: Jaw or MLC leaf position on positive side (IEC X2), projected to isocenter
# LeafWidths: Width of each leaf as projected to isocenter, same width on opposing bank
#
# Source parameters, including...
Expand Down Expand Up @@ -60,24 +62,26 @@ i:Ts/ShowHistoryCountAtInterval = 100000
dc:Ge/IEC_G/RotY_G = 0. deg
d:Ge/IEC_G/RotY = -1 * Ge/IEC_G/RotY_G deg

# IEC collimator rotation angle (in the same sense of RotZ)
# IEC collimator rotation angle (in the opposite sense of RotZ)
dc:Ge/IEC_B/RotZ_B = 0. deg
d:Ge/IEC_B/RotZ = 1 * Ge/IEC_B/RotZ_B deg
d:Ge/IEC_B/RotZ = -1 * Ge/IEC_B/RotZ_B deg

# Asymmetric jaw field settings along IEC coordinates Xb or Yb, projected to isocenter
s:Ge/Jaw/JawTravelAxis = "Y" # Jaw travel axis, "X" or "Y"
dc:Ge/Jaw/NegativeFieldSetting = -20. cm
dc:Ge/Jaw/PositiveFieldSetting = 20. cm
# Asymmetric jaw field settings along IEC coordinates X or Y, projected to isocenter
# Default 20 cm wide field at plane of isocenter (at SAD)
dc:Ge/Jaw/NegativeFieldSetting = -10 cm #Field setting along negative IEC_B axis
dc:Ge/Jaw/PositiveFieldSetting = 10 cm #Field setting along positive IEC_B axis
d:Ge/Jaw/RotZ = Ge/Jaw/JawRotZforTravelAlongIECX deg # Set to JawRotZforTravelAlongIECX or JawRotZforTravelAlongIECY

# MLC leaf widths and positions, projected to isocenter
s:Ge/MLC/LeafTravelAxis = "X" # MLC leaf travel "X" or "Y"
dv:Ge/MLC/LeafWidths = 42 5. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 5. cm
# 10 cm x 20 cm field, the field setting for each leaf is that as projected at isocenter
dv:Ge/MLC/NegativeFieldSetting = 42 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. -5. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. cm
dv:Ge/MLC/PositiveFieldSetting = 42 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. cm
# MLC orientation, leaf widths and positions, projected to isocenter
# Default 20 cm wide, 50 cm long field at plane of isocenter (at SAD) with all leaves open
d:Ge/MLC/RotZ = Ge/MLC/MLCRotZforTravelAlongIECY deg # Set to MLCRotZforTravelAlongIECX or MLCRotZforTravelAlongIECY
# MLC orientation, leaf widths and positions, projected to isocenter for 20 cm x 50 cm field
# IEC leaf number depends on direction of leaf motion: For Xb leaf 1 is first, Yb leaf 1 is last
dv:Ge/MLC/LeafWidths = 42 5. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 5. cm
dv:Ge/MLC/NegativeFieldSetting = 42 -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. -10. cm
dv:Ge/MLC/PositiveFieldSetting = 42 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. 10. cm

# Patient and couch field-dependent components
# IEC couch rotation angle (in the opposite sense of RotZ)
dc:Ge/IEC_S/RotZ_S = 0.0 deg
d:Ge/IEC_S/RotZ = -1 * Ge/IEC_S/RotZ_S deg