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Surface contour scanning system

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Presentation on theme: "Surface contour scanning system"— Presentation transcript:


2 Surface contour scanning system
- Improved accuracy and efficiency High level of integration Multiple applications

3 Laser-Camera Technology
Optical triangulation

4 Sentinel, LS100 - Discrete installation
- Technical evaluation at Karolinska, Stockholm - Clinical evaluation in Uppsala - First installation in Uppsala

5 Sentinel, LS200 - Attractive design - Simpler installation
- Service friendly - Design ready Q1 2007 - Delivery Q2 2007

6 Sentinel system – SW and HW
High level of user friendliness Connectivity Simplicity Efficiency

7 Connectivity - Network support

8 Sentinel – multiple applications
Patient Positioning Motion Detection Respiratory Gating

9 Sentinel – Patient Positioning
cPOSITIONING Improved accuracy Efficient workflow User friendly No additional markers No added radiation

10 User friendliness – Clinical mode

11 User friendliness – Advanced mode

12 Efficiency - Performance and Work flow
Scan time is typically 3-5 seconds Surface matching takes typically 1 second Sub-millimetre accuracy

13 Sentinel – Motion Detection
cMOTION Does not require active supervision Visualization Recording Alarm

14 cMOTION workflow cMOTION
Integrated workflow with cPOSITITION or Stand-alone functionality Markerless solution Alternative to manual supervision (camera + monitor), userfriendly solution. cPOSITIONING cMOTION

15 Sentinel – Respiratory Gating
cRESPIRATION Respiratory gating in the Sentinel system

16 Respiratory motion can affect the delivered dose distribution
Background Respiratory motion can affect the delivered dose distribution Especially in the thorax/abdominal region Available solutions Increased margins More dose will be delivered to the surrounding healthy tissue Organs at risk must still be protected, which may be very difficult if they move near or into the desired target volume Gated treatment Dose delivery is synchronized with respiratory motion Potential for dose escalation, resulting in higher delivered dose to the tumor while healthy tissue is spared The correlation between internal and external (surrogate) motion must be known

17 Establishing correlation
How can we establish the correlation between internal and external motion? 4D CT study Gated fluoroscopy (on a conventional simulator) End exhale End inhale 0% 100% Amplitude Gating window

18 Inter- and intrafractional variations
Breathing patterns Inter- and intrafractional variations Changes in frequency and amplitude Thoraxic vs. abdominal breathing Irregularities (coughing, unexpected breath hold, patient movement) Solution Coached breathing/biofeedback Parallel monitoring of both thoraxic and abdominal respiratory motion Algorithms for detecting irregularities

19 The cRespiration workflow
3D CT study (gated) Gated CT study (retrospecive/ prospective) Gated treatment planning and delivery Gating parameters

20 Prospectively gated CT study
CT room CT 3D CT study (gated) Establishing of gating parameters Real-time generation of gating signal Gating parameters Patient LS Respiratory signal

21 Retrospectively gated CT study
CT room CT Sorting of CT data according to respiratory phase Selection of phases suitable for treatment 3D CT study (ungated) 3D CT study (gated) 4D CT study Patient Gating parameters LS Respiratory signal

22 Gated treatment planning and delivery
Treatment room Treatment planning LINAC treatment delivery 3D CT study (gated) RT plan Gating enable (SW/HW) Real-time generation of gating signal Patient LS Respiratory signal Gating parameters

23 The cRespiration concept
Simplicity No markers to be placed Integrated workflow through the whole process Confidence No additional dose Sub-millimeter accuracy, measured at the same locations every fraction without manual guidance Parallel monitoring of thoraxic and abdominal breathing Immediate detection of irregular breathing or patient motion Versatility Support for several modes of operation – deep inspiration/end expiration breath hold, as well as coached and free breathing Tight integration with CT and Linac equipment from major vendors

24 Milestones June 2008: Clinical validation activities begin
In cooperation with the Academic hospital in Uppsala Philips Big Bore CT Elekta Precise Linac July : AAPM in Houston, Texas First public demo of the cRespiration module Q4 2008: Commercial release to all markets 2009: Support for additional CT and Linac equipment, e.g. Varian, GE, Siemens

25 Sentinel - Integration in a RT clinic, c4D software
System modules Patient alignment Full network support Motion detection (available Q2 2008) Gating functionality (available Q4 2008) Interfaces DICOM-RT interface for patient setup Interface to Elekta iCOM Interface to Varian 4D console Interface to Visir R&V Interface to Hexapod couch (Q2 2008)

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