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TheraViewLX: The low dose, high resolution Electronic Portal Imaging System
TheraView is the cost-effective, clinically proven image-guided radiation therapy (IGRT) system. With over 600 TheraViews installed worldwide,
more and more clinicians are discovering the benefits of a real-time, isocentrically mounted imaging solution. By bringing radiotherapy images
live and online, TheraView provides the radiation therapist with a more precise and effective alternative to time-consuming port film. More
importantly, the improved image quality can greatly enhance treatment, block shaping, and patient positioning accuracy.
Designed to
be versatile, the TheraView Portal Imaging System can be mounted onto virtually any linear accelerators (Varian, Siemens, Elekta).
The retractable detector allows the therapist to freely move around the treatment table for fast and efficient patient set up.
With TheraView's high resolution imaging chain, images are acquired and displayed in three possible modes:
Single Exposure: A set up image is acquired and displayed following a radiation exposure of 3-5 montior units or can be used during the entire treatment as a verification image.
Double Exposure: An open field and a treatment image are acquired in sequence to form and display a composite, superimposed image. The open and treatment images are also stored separate for review and enhancement possibilities.
Treatment: A sequence of images are recorded and displayed at a rate up to one image per second during treatment. Post-treatment, images can be relayed as a movie loop to show patient movement.
Advanced features offer the highest level of treatment verification, control and monitoring.
Designed for the precise needs of radiotherapy, TheraView provides therapists with a full spectrum of imaging and verification features:
- IGRT through TargetCheck software
- On-line reference image comparison
- IMRT online field/patient position verification & setup
- Pre-treatment, low dose imaging
- Positioning, field alignment and block/MLC shaping verification
- TheraView Couch Setup Assistant (TCSA), an add-on directly taking care of couch movements, from inside and outside the treatment room within a <0.5mm accuracy
- Double exposure
- Treatment image sequence
- Magnification
- Image enhancement
- Distance measurement
- Image annotation
- Networking capabilities
- Printing options
- DicomRT
- File management
THERAVIEW FEATURES & TECHNICAL SPECIFICATIONS
THERAVIEW FEATURES
Image Detection
- Scintillator screen
- High-quality digital extremely low noise C³D camera
- Large field of view - 280 x 280 mm
- Telescopic detector design with motorized movements
- Universal interface to most linear accelerators
Image Acquisition and Display
- 1024 x 1024 x 12 bit high resolution acquisition
- Highly sensitive TheraView C³D camera [|-40°|Cooled CCD] with optical data transmission
- Acquisition modes: Single, Double, and Treatment sequence exposures, Dosimetry
- Set-Up Images: displayed immediately and stored automatically
- Treatment Sequence: acquisition and display of one image per second
Image Processing Enhancement
- Edge enhancement
- Window/level and polarity inversion
- Automatic histogram equalization
- 2x magnification
- Image flip and rotation
- Distance measurements
- Grid overlay
- Image annotation
Image Comparison
- Online analysis of field size, MLC, and beam shape
- Patient position verification
- Automatic retrieval and display of reference images
- Previous portal images may be used as a reference image
- Reference image input by DicomRT image (requires optional DICOM module), or bitmap transfer
- Reference image input by film scanner (Vidar or flatbed), CT (sim), and CR device
- Side-by-side image display
Image Management
- Automatic storage of images onto hard disk or network
- Online image review and processing
- Patient information annotated to images
- DicomRT image compatible
- Hardcopy and archive options, also networked
System Operation
- Mouse/menu graphical user interface
- Streamlined operation maximizes patient throughput
- System self-diagnosis at start-up
- Radiation room work procedures are unaffected
- Transparent Windows® Network Connectivity
System Orientation
TECHNICAL SPECIFICATIONS
System Components
- Image detector with video camera
- Digital camera controller with optical 600Mb link
- Workstation
- Mouse and keyboard
- Modem or internet for Tele-diagnostics
Workstation Configuration
- Intel Premium Pentium 4, minimal 2.4 GHz CPU
- 512 MB RAM, minimal 100 GB data hard disk
- 19" TFT color monitor
- Five built in I/O ports: UTP 100MB/1 GB, RS-423 serial ports for external modem and control
- Writable DVD system for 4.7GB backup
Image Detector
- 400 X 400 mm scintillator screen
- Video camera resolution: 1300 x 1030 x pixels 65535 levels of gray
- Detection resolution at scintillator 0.78 mm (binned)
- Contrast detectability: 1%
- Image matrix optimized for display: 512V x 512H x 8-bit
Power Consumption
- 115/230V, 50/60 Hz, 300 watts max
Approvals
- 510(k), CSA, IEC 10601-1, UL544, CE, MOHW
Optional System Components
- Folding detector for maximal patient clearance
- TheraView Information Core System (TICS) for backup, archiving, and DicomRT
- Dye sublimation thermal printer
- Low cost postscript or HP laser printer
- Film digitizer for simulator image input
- Flatbed scanner 12 bit, 304, 8 x 431, 8 mm (12. x 17.)
- Independent review workstation client
- Optional DICOM Export
- Standard graphical format input (.bmp, .jpg, .tif)
- Background http server for programming and review
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