Author: Fabich, A.
Paper Title Page
THPS081 Design Choices of the MedAustron Nozzles and Proton Gantry based on Modeling of Particle Scattering 3621
 
  • M. Palm
    CERN, Geneva, Switzerland
  • M. Benedikt, A. Fabich
    EBG MedAustron, Wr. Neustadt, Austria
  • M. Palm
    ATI, Wien, Austria
  
  MedAus­tron, the Aus­tri­an hadron ther­a­py cen­ter is cur­rent­ly under con­struc­tion. Ir­ra­di­a­tions will be per­formed using ac­tive scan­ning with a pro­ton or car­bon ion pen­cil beam which is sub­ject to scat­ter­ing in vac­u­um win­dows, beam mon­i­tors and air gap. For ap­pli­ca­tions where sharp lat­er­al beam penum­bras are re­quired in order to spare crit­i­cal or­gans from un­want­ed dose, scat­ter­ing should be min­i­mal. A se­mi-em­pir­i­cal scat­ter­ing model has been es­tab­lished to eval­u­ate beam size growth at the pa­tient due to up­stream scat­ter­ing. Major de­sign choic­es for pro­ton gantry and noz­zle based on the scat­ter­ing cal­cu­la­tions are pre­sent­ed.  
 
THPS082 Dose-homogeneity Driven Beam Delivery System Performance Requirements for MedAustron 3624
 
  • M. Palm, F. Moser
    CERN, Geneva, Switzerland
  • M. Benedikt, A. Fabich
    EBG MedAustron, Wr. Neustadt, Austria
  • M. Palm
    ATI, Wien, Austria
  
  MedAus­tron, the Aus­tri­an hadron ther­a­py cen­ter is cur­rent­ly under con­struc­tion. Ir­ra­di­a­tion will be per­formed using ac­tive scan­ning with pro­ton or car­bon ion pen­cil beams. Major beam de­liv­ery sys­tem con­trib­u­tors to dose het­ero­geneities dur­ing ac­tive scan­ning are eval­u­at­ed: beam po­si­tion, beam size and spot weight er­rors. Their in­di­vid­u­al and com­bined ef­fect on the dose dis­tri­bu­tion is quan­ti­fied, using se­mi-an­a­lyt­i­cal mod­els of lat­er­al beam spread in the noz­zle and tar­get and depth-dose curves for pro­tons and car­bon ions. De­duced re­quire­ments on crit­i­cal parts of the beam de­liv­ery sys­tem are pre­sent­ed. Pre­ven­tive and ac­tive meth­ods to sup­press the im­pact of beam de­liv­ery in­ac­cu­ra­cies are pro­posed.