Users Manual Part 1

IBA | xxxviii | Clinical User’s Guide
Volume 1 - Treatment Session
Chapter 17
Performing QA Checks and Verifying Beams With a
Water Phantom
Locating the Water Phantom on the PPS ............................ 17-3
Verifying Beams .................................................................. 17-5
Chapter 18
Troubleshooting Treatment Room Equipment
PART III
THE PENCIL BEAM SCANNING (PBS) SUITE
Chapter 19
Guiding You Through the Pencil Beam Scanning
Documentation
Chapter 20
Pencil Beam Scanning Principles
Introduction ......................................................................... 20-1
Clinical Advantages ..................................................... 20-2
Longitudinal and Transversal Dose Distribution in PBS ....... 20-3
Longitudinal Distribution .................................................. 20-3
Layers .......................................................................... 20-3
Transversal Distribution ................................................... 20-4
Beam Delivery Characteristics in PBS ................................. 20-4
Spot Scanning ................................................................. 20-4
Repainting Modes ........................................................... 20-5
In-Layers Repainting .................................................... 20-6
Decrease in Energy ..................................................... 20-6
Back and Forward ....................................................... 20-6
None (no layer repainting) ........................................... 20-6
Mixed Repainting ........................................................ 20-6
Chapter 21
Introducing PBS Beam Delivery System Equipment
The PBS Treatment Mode ................................................... 21-1
PBS Capable Nozzle Types .............................................. 21-2