QADOS Theraview Demonstration

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QADOS Theraview Demonstration

• Radiation Therapy
• Smart? integration
• Real-Time Image Processing
• TheraView Technology
• by Cablon Medical BV
• portal_at_theraview.com

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An ISO related solution for any gantry

• Attachable to any accelerator
• Siemens
• Elekta
• Varian / GE
• Scanditronix
• Hitachi
• Mitsubishi
• Theratronics (MDS Nordion)

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Siemens

• Primus
• Mevatron
• BeamTheraView

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Elekta / Philips

• SL types 15,18,25
• Sli types
• SL 75

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Varian / GE

• GE OEM product Targetview
• Saturne I II , Saturne 41
• Saturne 42, Saturne 43
• Varian
• 600
• 2100, 2300

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Scanditronix

• MM22
• MM50
• Hitachi Version

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Clinical Value of Portal Imaging

• Reduces field placement errors in respect to ISO
  centre
• Checks Field shape / MLC and block errors
• Theraviews high resolution digital images allows
  oncologists to verify patient positioning before
  AND throughout the entire treatment procedure

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System Components

• Detector Assembly
• Scintillator Phosphor layer screen detects
  high quality images at low dose (1-3 mu)
• Instant image access after initial exposure as
  treatment proceeds
• Highly front-edge reflective mirror
• High resolution video camera
• Lowgtgt 10001 signal to noise ratio

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Detector Specifications

• Detector size up to 400 mm x 400 mm
• field of view 280 x 280 mm
• lt 0.8 LP/mm resolution
• Contrast detectability of 1
• Camera resolution of 1000 lines
• Image frames of 512 V x 512 H x gt14 bit

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Detector assembly

• Assembly can be retracted and lowered for minimum
  interference during patient set-up
• Remote control motorised positioning
• After extension into field,
• detector can be moved vertically to optimise
  viewing distance from iso-centre v.o.f..
• gtV3.0 Data automatically transferred to input
  module

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Workstation

• SUN SPARC station
• 21 Colour monitor
• Keyboard and mouse

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Reference Image

• Simulator image
• Film Digitizer
• Flat bed scanner
• Digital link
• DRR
• Dicom send/receive

• Field size
• Symmetric
• Asymmetric
• MLC
• Blocks
• Anatomical template

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Reference Input Screen

• Direct digital input and / or
• Dicom RT SC / DRR
• Scanner or Digitiser
• Powerful drawing tools for reference input of
• Field size and shape
• Blocks / MLC info
• Anatomical template

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Image Smart Acquisition

• Treatment -A sequence of images recorded and
  displayed for ON-Line verification and movie loop
  replay
• Single exposure -Low dose (3 Mu or less) set-up
  image
• Double Exposure -Treatment field open field
  image acquired in sequence and superimposed to
  display a composite image
• In all modes the high resolution image is
  automatically optimised, enhanced and displayed

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Smart Integration ( 3 steps)

• Input Patient Field ID,
• Gantry Angle, Detector Height
• ( automated in late 2001 TheraView)
• Pre calibrated dose rate setting for
• Optimal beam start detection algorithm
• Optimal low MU imaging
• Push Begin

No patient related parameters are needed for
optimal imaging !!.
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Acquisition

• A Prostate field Lateral and AP
• Acquired with treatment mode

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Image verificationTargetCheck

• Automatic field size shape detection
• Position verification with use of anatomical
  template
• Saves the results of field placement detection
• Generates a graph with the patient position
  displayed in time
• Produces a screendump with a Codonics or network
  printer

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Target Check
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Graph
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TargetCheck window
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Image Dose acquisition

• V3.0 brings these modules
• DISPLAY RELATED
• Smart Acquisition
• quasi 14bits frame acquisition by optimal AD
  conversion and filtering
• Segmented histogram
• Integration of N frames in 16bits
• scaling to 8-bit by autogamma

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Image Dose acquisition

• V3.0 brings these modules
• DOSE RELATED Minimal Sparc 5-170
• Smart Acquisition
• quasi 14bits frame acquisition by optimal AD
  conversion and filtering
• Segmented histogram
• Integration of N 16 bits frames in 32bits
  accumulator
• Output through special channel
• 16 bits weighted frames
• 32 bits accumulator

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Windows connectivity

• Makes it possible to access TheraView as a file
  server, from a PC in a MS Windows Network
  environment

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Windows connectivity
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Local web browser.

• Simple review functionality, password protected
  from anywhere in the hospital intranet
• On-line manual(s)
• Set-up of TheraView parameters and peripherals

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Local web browser.
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Postscript

• Thank you !!!