Add option for one or two leaf types in SYNCHDMLC

Input lines for all cross section dimensions must still exist but these
can be filled with blanks, zeroes or arbitrary real numbers for unused
leaf types in the multi-leaf collimator model.

HEN_HOUSE/doc/src/pirs509a-beamnrc/inputformats/SYNCHDMLC.inp

@@ -60,6 +60,10 @@
  ZLEAF_$SYNCHDMLC(1)>=ZTIP_$SYNCHDMLC(1), etc. See the BEAM
  manual or GUI help for restrictions on widths.
 
+ Note: If there are no FULL leaves in your model, you can input
+ blanks, zeroes, or arbitrary floating-point numbers for these
+ cross section dimensions.
+
 
  6 LEAFWIDTH_$SYNCHDMLC(2), WTONGUE_$SYNCHDMLC(2), WGROOVE_$SYNCHDMLC(2),
  WTIP_$SYNCHDMLC(2), WRAILTOP_$SYNCHDMLC(2), WRAILBOT_$SYNCHDMLC(2),
@@ -131,6 +135,9 @@
  leaf on +X [ORIENT=0] or +Y [ORIENT=1] side of ISOCENTER
  leaf only) ZTONGUE_$SYNCHDMLC(1)<=ZGROOVE_$SYNCHDMLC(3)
 
+ Note: If there are no HALF leaf pairs in your model, you can input
+ blanks, zeroes, or arbitrary floating-point numbers for these
+ cross section dimensions.
 
  8 LEAFWIDTH_$SYNCHDMLC(4), WTONGUE_$SYNCHDMLC(4), WGROOVE_$SYNCHDMLC(4),
  WTIP_$SYNCHDMLC(4), WRAILTOP_$SYNCHDMLC(4), WRAILBOT_$SYNCHDMLC(4),
@@ -188,6 +195,10 @@
  ZRAILTOP_$SYNCHDMLC(5): Z of top of support rail
  ZRAILBOT_$SYNCHDMLC(5): Z of bottom of support rail
 
+ Note: If there are no QUARTER leaves in your model, you can input
+ blanks, zeroes, or arbitrary floating-point numbers for these
+ cross section dimensions.
+
  Repeat 10 NGROUP_$SYNCHDMLC times
 
  10 NUM_LEAF_$SYNCHDMLC(I), LEAFTYPE (2I5)
@@ -263,7 +274,7 @@
 
  If MODE_$SYNCHDMLC=1 or 2 (dynamic delivery or step-and-shoot delivery):
 
- 14b mlc_file (A80)
+ 14b mlc_file (A256)
 
  mlc_file: The full name of the file containing leaf opening
  data. The format of the file contents is as follows:
@@ -286,17 +297,17 @@
  MLC_TITLE: A title line
  NFIELDS_$SYNCHDMLC: Total number of fields
  INDEX_$SYNCHDMLC(I): Index of field I. 0 <=INDEX_$SYNCHDMLC(I) <= 1 and
- INDEX_$SYNCHDMLC(I) >= INDEX_$SYNCHDMLC(I-1). This
+ INDEX_$SYNCHDMLC(I) > INDEX_$SYNCHDMLC(I-1). This
  number is compared to a random number on (0,1) at
  the start of each history; if the random number is
  <= INDEX_$SYNCHDMLC(I), then field I is used.
  NEG_$SYNCHDMLC: Min. Y (ORIENT_$SYNCHDMLC=0) or
-   X (ORIENT_$SYNCHDMLC=1)
+   X (ORIENT_$SYNCHDMLC=1)
  of front opening in leaf (ie the opening at
  ZMIN_$SYNCHDMLC) if ENDTYPE=1, or of rounded end
  of leaf if ENDTYPE=0 for leaf J in field I.
  POS_$SYNCHDMLC: Max. Y (ORIENT_$SYNCHDMLC=0) or
-   X (ORIENT_$SYNCHDMLC=1)
+   X (ORIENT_$SYNCHDMLC=1)
  of front opening in leaf if ENDTYPE=1, or of
  rounded end of leaf if ENDTYPE=0 for leaf J in
  field I.
@@ -359,7 +370,8 @@
  *******
 
  The following example defines a multi-leaf tungsten collimator design
- based loosely on the TrueBeam high-definition mlc (HD120).
+ based loosely on the TrueBeam high-definition mlc (HD120) but using
+ all leaf types.
  Actual parameters are DIFFERENT - this serves just as a template.
  Do not attempt to use these parameters for a simulation of the real
  machine.

HEN_HOUSE/doc/src/pirs509a-beamnrc/pirs509a-beamnrc.tex

@@ -6705,7 +6705,8 @@ \subsubsubsection{SYNCMLCE}
 \index{SYNCHDMLC}
 \subsubsubsection{SYNCHDMLC}
 SYNCHDMLC is a version of SYNCVMLC optimized for modeling the High-definition Multileaf
-Collimator (HDMLC 120) available on TrueBeam and Novalis linacs. SYNCHDMLC features five
+Collimator (HDMLC 120) and the Millenium MLC (120 MLC) available on TrueBeam and Novalis linacs.
+SYNCHDMLC features five
 possible leaf cross sections: FULL, HALF TARGET/HALF ISOCENTER pairs, and QUARTER TARGET/QUARTER ISOCENTER
 pairs. FULL leaves are similar to FULL leaves in DYNVMLC/SYNCVMLC. HALF TARGET/HALF ISOCENTER leaves are
 equivalent to the TARGET/ISOCENTER leaves in DYNVMLC/SYNCVMLC. QUARTER TARGET/QUARTER ISOCENTER have the
@@ -8331,12 +8332,15 @@ \subsubsection{SYNCHDMLC}
 \index{SYNCHDMLC}
 
 SYNCHDMLC is a CM coded by Lobo \& Popescu and based on an earlier code by Borges et al\cite{Bo12} for
-modeling the high-definition micro mlc (HD120) available on TrueBeam and Novalis linacs. In overall
+modeling the high-definition micro mlc (HD120) and the Millenium MLC (MLC 120) available on TrueBeam and Novalis linacs. In overall
 design it is similar to DYNVMLC/SYNCVMLC but features two different types of TARGET/ISOCENTER leaf pairs:
 HALF TARGET/HALF ISOCENTER and QUARTER TARGET/QUARTER ISOCENTER. In terms of leaf cross-section
 (perpendicular to the opening direction), these are
 similar to the TARGET/ISOCENTER leaves in DYNVMLC, with HALF TARGET/HALF ISOCENTER leaves being
-wider than the QUARTER TARGET/QUARTER ISOCENTER leaves.
+wider than the QUARTER TARGET/QUARTER ISOCENTER leaves. The five available leaf types are intended to facilitate
+modeling of either the HD120 MLC (HALF TARGET/ISOCENTER and QUARTER TARGET/ISOCENTER leaves) or the MLC 120
+(FULL and HALF TARGET/ISOCENTER leaves). However, the user is free to use any combination of leaf types to model
+their MLC, provided that TARGET/ISOCENTER leaves are always used in pairs.
 
 \begin{figure}[htpb]
 \begin{center}
@@ -8353,7 +8357,7 @@ \subsubsection{SYNCHDMLC}
 \end{center}
 \vspace*{-1.0cm}
 \caption[SYNCHDMLC CM geometry]
-{Example SYNCHDMLC with 12 leaves opening in the Y
+{Example SYNCHDMLC using all leaf types with 12 leaves opening in the Y
 direction ({\tt ORIENT}=0). The X cross-sections of the five
 leaf types show the dimensions that the
 user must input (see Table~\ref{dynvmlc_tab} for label key).
@@ -8396,10 +8400,9 @@ \subsubsection{SYNCHDMLC}
 of adjacent leaves all having the same type. Since HALF TARGET/HALF ISOCENTER leaves and
 QUARTER TARGET/QUARTER ISOCENTER leaves must always occur in pairs, there are really
 only three types to choose from. This also means there must be an even number of
-HALF or QUARTER TARGET/ISOCENTER leaves. Also note that, even though the user
-must specify cross-sections for all leaf types, they need not use all types
-in a given MLC simulation. Thus, there may be no FULL leaves, HALF TARGET/ISOCENTER pairs,
-or QUARTER TARGET/ISOCENTER pairs in the simulation.
+HALF or QUARTER TARGET/ISOCENTER leaves. Also note that, even though an input line must
+exist for all cross-sections, the values on this line can be blanks, zeroes, or nonsense real
+numbers for leaves not being used in the MLC model.
 
 Similar to DYNVMLC and SYNCVMLC, leaf ends can be straight, focused ({\tt ENDTYPE}=1) or cylindrical
 ({\tt ENDTYPE}=0). For straight, focused ends, the user must specify the Z-position of the