Set taper angle to 0.80 degree (from original 2.18degree).
Shorten the outer dimension by 0.25 inches.
Close the gap and overlap by 4.0mm
This image is the <xtru> solid part of 6A. The final solid is obtained by subtracting a cone. In the image solid lines show the Collimator 6A before and dashed line show after the change. The larger radius circular arcs show the original and changed outer extent. The smaller radius arcs show the IR of subtracting cone for US and DS piece. To accomodate the smaller angle the <xtru> geometry is extended inward.
Collimator 6B Changes:
Change taper to 1.20 degree.
Change IR to 80.00mm from 59.91mm.
The two circle show the initial and final position of IR for the US face of US piece of 6B.
Collimator 4 Changes:
The IR of collimator 4 is changed from 40mm to 26mm.
Collimator 6A Changes:
This image is the
<xtru>solid part of 6A. The final solid is obtained by subtracting a cone. In the image solid lines show the Collimator 6A before and dashed line show after the change. The larger radius circular arcs show the original and changed outer extent. The smaller radius arcs show the IR of subtracting cone for US and DS piece. To accomodate the smaller angle the<xtru>geometry is extended inward.Collimator 6B Changes:
The two circle show the initial and final position of IR for the US face of US piece of 6B.
Collimator 4 Changes: