QA BEAMCHECKER™ PLUS 25
• Field Size (x,y) in cm: Default is 20,20
• Measured by: Name or initials of the baseline creator
• Action Levels: represent the point at which a flatness, axial symmetry, transverse symmetry,
or constancy ‘out of tolerance’ will occur during measurement in Real-Time Operation or Wire-
Free Modes.
If a measured energy differs by or more than the percentage entered in ‘Action Level 1’ box, a
level 1 ‘out of tolerance’ will occur. Likewise, if a measured energy differs at or above the
percentage entered in ‘Action Level 2’ box, a level 2 ‘out of tolerance’ will occur, with Action
Level 2 occurring at a greater percent difference. Default settings are Action Level 1 at 3% and
Action Level 2 at 5%.
About Expected Output
If an output offset from previous beam calibration is known at time of baseline acquisition, this
number can used to shift the measurement results. For example, if the baseline Expected
Output is entered as 98%, an identical subsequent measurement in Wire-Free or Real-time
modes will result in a -2% constancy result. This parameter can essentially be used to create
asymmetric action levels. In this example using 98% for Expected Output, a 3% action level
would produce a fault if the reading was 1% lower or 5% higher than the baseline.
Dynamic 5 Channel Room
• Label: D01 - D25. Up to 25 different plans can used per Dynamic 5 Channel room. Use this
designation to identify which plan is being baselined.
• Dose: Configured dose value of the beam
• Dose Rate: Configured dose rate of the beam. Default is NA (not applicable)
• SSD (Source to Surface Distance) in cm: Default is 100
• Gantry Angle in degrees: Default is 0
• Field Size (x,y) in cm: Default is 20,20
• Measured by: Name or initials of the baseline creator
• Action Levels: represent the point at which a flatness, axial symmetry, transverse symmetry,
or constancy ‘out of tolerance’ will occur during measurement in Real-Time Operation or Wire-
Free Modes.
If a measured energy differs by or more than the percentage entered in ‘Action Level 1’ box, a
level 1 ‘out of tolerance’ will occur. Likewise, if a measured energy differs at or above the
percentage entered in ‘Action Level 2’ box, a level 2 ‘out of tolerance’ will occur, with Action
Level 2 occurring at a greater percent difference. Default settings are Action Level 1 at 2% and
Action Level 2 at 4%.
• Description: Use this field to help describe the plan. For example, “10X Rotational Plan B”.
TomoTherapy System Room
• Delivery: Static or Dynamic (select based on plan type delivered, see Appendix B)
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