PerfectPitch 6 Degrees of Freedom QC Cube

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PerfectPitch 6 Degrees of Freedom QC Cube

The accuracy of CBCT alignment and couch shift QA is of fundamental importance in the accuracy of delivered dose in Image Guided Radiation Therapy (IGRT). The 73mm cube has one central axis titanium marker and two offset titanium markers (2mm diameter) for the testing and verification of predetermined measurable couch shifts.  This cube can be used to test the accuracy of CBCT alignment and couch shift in a simple and efficient manner.  Images can be transferred to the treatment planning system to check coincidence of treatment planning system to couch shifts.

Markers

Three Titanium Balls 2mm for Isocenter and Table Offsets

Four Aluminum Balls 2.38mm Diameter on four outside sides and one Titanium Ball 2 mm in Center for the CT scan

Eight Aluminum Wire Markers 10mm x 2mm diameter set in two rows, which project to Isocenter at 51.9mm on four CBCT axial slices

Titanium Marker Locations in Cube

One at Isocenter: X, Y, Z=0

One located from Isocenter: X: -2cm; Y: -2cm; Z: +2cm

One located from Isocenter: X: +2cm; Y: +1cm; Z: -1cm

Varian/Elekta Indexing Bar w/ two 1.57mm Titanium Balls

This bar can be used to check couch alignment by CT showing the two 1.57mm Titanium Balls and two air holes which are on the center line of the bar.

The laser line must pass over all four holes.

Includes

1)  Base, 2.5 Degree Roll-Pitch-Rotation for 73mm cube 
1)  73mm Cube with 12 Aluminum and 3 Titanium Markers
1)  Varian/Elekta Indexing Bar with 2 Titanium Balls (356-203)
1)  Level, Digital, Dual / Single Axis (352-245)

Optional Items
These items are compatable with Base, 2.5 Degree Roll-Pitch-Rotation for 73mm cube

710-033   73mm Acrylic Cube with 6mm Tungsten Ball for Winston-Lutz Test
710-034   73mm Acrylic Cube with 6.35mm Titanium Ball for Winston-Lutz Test