chapter  25
24 Pages

Applications to Secondary Radiation Dosimetry in External Beam Radiation Therapy

ByHarald Paganetti

Radiation Therapy ....................................................................................... 567 25.1.2 Studies on Scattered Doses in External Beam Radiation Therapy .......568

25.1.2.1 Photons .........................................................................................568 25.1.2.2 Protons .......................................................................................... 570

25.1.3 The Need for Computational Phantoms to Study Scattered Doses in External Beam Radiation Therapy .......................... 570

25.2 Methods ...................................................................................................................... 571 25.2.1 Implementation of Patient Computational Phantoms for Organ

Dose Calculation into a Monte Carlo Environment ............................... 571 25.2.1.1 Computational Phantom Types ................................................ 571

25.2.2 Monte Carlo Implementation ..................................................................... 573 25.2.3 Radiation Quality Factors .......................................................................... 576 25.2.4 Dose Scoring ................................................................................................ 577 25.2.5 A Few Words on Computational Phantoms to Estimate

the Risk for Second Malignancies ............................................................. 578 25.3 Results ......................................................................................................................... 579 25.4 Conclusion .................................................................................................................. 582 Acknowledgments ...............................................................................................................583 References .............................................................................................................................583

25.1.1 The Concern for Scattered Doses in External Beam Radiation Therapy