Integration of optical tracking for organ motion compensation in scanned ion-beam therapy 31 July 2012 G Fattori [1] , N Saito [2] , A Pella [1] , R Kaderka [2] , M Seregni [1] , A Constantinescu [2] , P Cerveri [1,3] , P Steidl [2] , M Riboldi [1,3] , G Baroni [1,3] and C Bert [2] AAPM 2012 Annual Meeting [1] Politecnico di Milano [2] GSI Helmholtzzentrum für Schwerionenforschung GmbH [3] Centro Nazionale di Adroterapia Oncologica (CNAO)
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Integration of optical tracking for organ motion compensation in scanned ion-beam therapy.
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Integration of optical tracking for organ motion compensation in scanned ion-beam therapy
31 July 2012
G Fattori[1], N Saito[2], A Pella[1], R Kaderka[2], M Seregni[1], A Constantinescu[2], P Cerveri[1,3], P Steidl[2], M Riboldi[1,3], G Baroni[1,3] and C Bert[2]
AAPM 2012 Annual Meeting
[1] Politecnico di Milano [2] GSI Helmholtzzentrum für Schwerionenforschung GmbH [3] Centro Nazionale di Adroterapia Oncologica (CNAO)
2 - 10 Presentation outline
INTRODUCTION: the role of optical tracking system in moving targets treatment Moving targets treatment in scanned IBT Optical Tracking Systems (OTS)
SYSTEMS INTEGRATION: integrated setup with GSI Therapy Control System
OTS/TCS integration RESULTS: performance and dosimetric results
Lateral target motion compensation Performance study Preliminary 3D target motion results and future works
3 - 10 Workflow of moving targets treatment with beam tracking
X-RAY STEREO PROJECTIONS
SOFT-TISSUE IMAGING
US MRI
DEPTH LATERAL
4DCT …
PHA
SE 1
4D
IMA
GIN
G M
OTI
ON
D
ETE
CTI
ON
DO
SE
D
ELI
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4D TREATMENT PLAN (TP)
PHA
SE N
THERAPY CONTROL SYSTEM (TCS) TR
EAT
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NT
VE
RIF
ICAT
ION
IN-BEAM PET OFFLINE PET
OPTICAL EXTERNAL SURROGATES TRACKING
ü Non-invasive ü High frequency ü High accuracy ² Surrogate signal
INTERNAL – EXTERNAL CORRELATION MODELS
ü Periodic imaging for train/retrain
ü Target position estimation from external signal
TARGET MOTION
4 - 10 Optical Tracking System (OTS) SMART-DX100, BTS Bioengineering Windows based workstation 3 free-standing Infrared TVC cameras 15 min calibration procedure 3D reconstruction of markers: • 3D error < 0.3 mm in 1 m3 volume • Frequency: 100 Hz
OTS APPLICATIONS IN HIGH CONFORMAL RADIATION THERAPY
• SETUP VERIFICATION: visual feedback during patient daily re-positioning • REAL TIME MOTION MONITORING: continuous patient surveillance during treatment
CNAO patient positioning Ongoing studies on surface reconstruction
5 - 10 Integrated software for setup verification and motion monitoring