Syntax:
XBRT: TTD={total dose delivered in all fractions (Gy)}
Example:
XBRT: TTD=60 NTD=30 !60 Gy total/(30 fractions) =2 Gy fraction size
XBRT: TTD=DD1 NTD=30 !30 daily doses
DD1 = 50 51 52 53 54 55 56 57 58 59 60 / !fraction sizes from 1.67 Gy to 2.0 Gy
Purpose: Set the total dose delivered in all fractions. Fraction size is calculated as TTD/NTD (see the TD4F keyword for an alternate method).
Data Type: real
Unit: Gy
Default: none
Comments: The baseline radiation treatment scenario is defined by the number of treatment days (NTD) and the size of each daily fraction (TD4F). The temporal pattern of radiation deliver can be modified using the optional parameters WDO and TMX. Use the FDT or DFDM: keyword to specify details related to fraction delivery. The total treatment dose (TTD) parameter can be used to automatically adjust the size of the daily dose fractions to increase or decrease the total treatment dose while preserving the overall temporal pattern of radiation delivery.
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