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3D Scanning Comes Full Circle

  • AutoSetup
  • No Tank Shifts
  • Better Data

Accurate, Reproducible Results

The 3D SCANNER is different by design. 3D SCANNER has been developed from the ground up to provide accurate, reproducible beam data in an era of modern treatment modalities and busy clinical staff. Learn more.

The 3D SCANNER Benefits

The geometrical design, setup process, and software have all been developed to improve not only the accuracy of measurement data, but also the water tank setup process, making it less subjective and more reproducible.


  • Reproducibly and automatically sets detector position at the water surface, levels and aligns tank
  • Total time: < 20 minutes

No Tank Shifts

  • Position tank once
  • 650 mm scan range without moving tank
  • Position detector in any relevant 3D location
  • Consistent detector orientation without repositioning detector

Better DataTM

  • Optimal signal to noise ratio for smoother scans without processing
  • Eliminate user setup subjectivity with AutoSetup and no tank shifts
  • Consistent detector orientation for in-plane, cross-plane, and diagonal scans
  • Searchable database for effective data management and sharing
  • Raw data is always available even if processing applied
  • Every data process layer is saved and accessible
  • Export PDF reports

360º of Scanning:

Detector Freedom

3D SCANNER offers a diameter drive for consistent detector orientation for in-plane, cross-plane, diagonal, and all other angles throughout the entire 360º circumference. Rotation range of 330º eliminates the need for tank shifts.

The 3D SCANNER system supports off-axis scans with this geometry by combining rotation and diameter movements during the measurement.

Scanning Range
Ring Range


360 degrees of scanning with consistent detector orientation results in better data and eliminates the need to change tank setup.


Less Subjective, Saves Time


No Tank Shifts
3D SCANNER water sensor measures water surface relative to the scanning mechanism at three points and automatically adjusts the water tank leveling using two electric motors.


Auto Center
3D SCANNER measures a 10 x 15 cm beam to determine the center of the beam relative to the center of 3D SCANNER. Two electric motors then align the center of the 3D SCANNER with the beam center.

Automatischer Winkelversatz

Auto Angle Offset
3D SCANNER uses a series of beam measurements to automatically establish in-plane and cross-plane home positions. The ring drive electric motor’s zero position is set to the found cross-plane direction.

Consistent Detector Orientation

Better Results



Square Tank


Extended Scanning Ranges:

Square 3D water tanks cannot measure a full 40 x 40 cm field at 30 cm depth and 100 cm SSD unless the user shifts the water tank twice, taking two measurements of two “halves” of the beam at different tank locations. This technique is time intensive and can introduce errors that compromise data quality.

The cylindrical shape of the 3D SCANNER enables the most efficient scanning ranges compared to square water tanks. A 65 cm scan range is possible without a shift of the 3D SCANNER. This allows a 40 x 40 cm measurement at 30 cm depth and 100 cm SSD, without the inconvenience and potential errors involved in shifting the water tank.

A 65 cm scan range is achieved with the offset detector holder, whereby two scans are merged and no tank shift is needed.

Square Tank MAX: 55 cm = Tank shift
3D SCANNER MAX: 65 cm = No tank shift

PercentIncrease quadrat

35% increase in scan range inline/crossline

Integrated Electronics

The 3D SCANNER design streamlines the connection and packaging of a 3D water tank system with several features:

Single Cable
3D SCANNER utilizes the same power/data cable that is used for other Sun Nuclear instruments, saving the user from installing another cable in the bunker.

All 3D SCANNER accessories plug directly into the 3D SCANNER eliminating the need for external junction boxes.

The electronics housing attaches to the 3D SCANNER and contains the following:

  • Electrometer Unit – A dual channel electrometer collects all field and reference data for the 3D SCANNER. The electrometer is guarded against extra cameral volume and provides exceptional specifications for low noise scan data that requires minimal processing
  • Control Unit – 3D SCANNER control electronics for motors and other hardware

Intuitive Software Saves Time

3D SCANNER operates using SNC DosimetryTM scanning software. SNC Dosimetry is a modern software application designed to offer both familiar concepts from existing water tank conventions, as well as new tools that were not previously available with a 3D water tank system.


1. Queues
Queues organize and execute groups of scans. Queue results and analysis are displayed instantly for saving to a project.

2. Database
All data is indexed in a searchable database. Scanned data can then be shared among users as needed.

3. Layers
Unprocessed data and processing history is preserved and can be recalled as needed.

4. Analysis
Selected scans provide on-screen analysis.

5. Projects
Measurements may be organized in multi-level projects for customizable organization. Examples of projects include: annual QA and commissioning.

6. Graphs
Scanned data is displayed graphically.

7. Processing Layers
Each processing function is treated as a unique layer of the scan data. The processing layers do not overwrite the original scan data, so users may revert to earlier unprocessed data at any time.

Features and Specifications

Vertical (mm): 400.0
Diameter (mm): 650.0
Ring (degrees): 330.0
Motors: Encoded stepper/servo
Scanning modes: Continuous and step
Scanning Speed Range (mm/sec): Variable up to 16
Scanning Accuracy (mm): 0.1

Water Tank
Thickness Wall / Bottom (mm): 13 / 19
Height (mm): 673
Width (mm): 875
Diameter Inner (mm): 676
Water Capacity (L): 166
Weight Empty / Full (kg): 44 / 210

Tank Centering: Automatic
Leveling: Automatic
Surface Detection: Automatic
TPS Export: Included

TPR/TMR Measurement
Drain Rate (cm/min): ~ 13
TPR Measurement Fill/Drain (min): ~ 3.5/2.5

Warm up Time (min): < 1.0
Charge: 10pC to no upper limit
Current: 10pA – 7.5nA
Leakage (pA): < 0.001
Collection Interval (ms): 50
Voltage (V): Adjustable, -400 to +400
Non-linearity: ± 0.1%
Repeatability: +/- 0.25%
A/D Converter: 16 bit
Linac Pulse Count: Included with threshold detection

Computer Hardware/Software Requirements
CPU: 2.4GHz; 2 cores
Hard Drive Space: 3GB
Operating System: Windows XP and 7
USB Version: 2.0
Video Card Memory: 64MB

3D MiniLift
Vertical Height Min. (mm): 570.0
Vertical Height Max (mm): 950.0
Vertical Stability (mm): 1.0
Configuration Dimensions L/W/H (mm) Measurement: 1230.0 x 1130.0 x 584.0
Storage: 940.0 x 630.0 x 584.0
Transport: 1520.0 x 720.0 x 584.0
Disassembled Dimensions L/W/H (mm) Automatic Leveling Platform: 612.0 x 612.0 x 128.0
Lift: 305.0 x 406.0 x 508.0
Frame: 940.0 x 592.0 x 305.0
Total weight (kg): 87.7 (Does not include leveling platform)
Individual Component Weight (kg): Frame assembly: 45.7
Actuator assembly: 38.2
Handle: 3.8
Leveling Platform: 23.0

3D Reservoir
Max Fill / Drain Speed (min): 7 / 5
Dimensions L/W/H (cm): 114.2 x 65.0 x 90.0
Weight (Full / Empty, kg): 228.0 / 39.0
Capacity (L): 187.0
Fill and Empty Rate (L/min): 22.0
Ground Clearance (mm): 130.0

FFF: Yes
Stereotactic: Yes
Applicable TPS Systems: Yes


3D SCANNER Accessories

NEW! Referenz DetectorTM

  • Patented out-of-field reference detector for use in water tank scanning of photon energies
  • Eliminates scanning chamber interference in small SRS fields
  • Use with any field size
  • No need to move location for different field sizes
3D Mini Lift

3D MiniLiftTM

  • Straddles the linac couch ring for stability
  • Easily stored, requires less space
  • Fits through standard size doorways
  • Breaks down easily for transport

3D ReservoirTM

  • Time to fill 3D Scanner: < 7 minutes
  • Time to empty 3D Scanner: < 5 minutes
  • Capacity of 187 liters


  • 50.4 cm scan area with 127 SunPoint® Diode Detectors
  • Quick connect to 3D SCANNER, no tools required
  • Detector size 0.8 x 0.8 mm with 4 mm detector spacing

EDGE DetectorTM

  • Accurate penumbra characterization for all fields
  • Ideal for steep dose gradients and small fields
  • On Accuray Recommended QA Equipment list
  • 842 times smaller in volume than micro ion chambers
  • 100 times more signal than micro ion chambers
  • No dose volume averaging
  • Accuracy for critical penumbra measurements
  • Works with all common water phantoms


  • Less than 5 minutes to install – no tools required
  • Works with 3D Reservoir for fast drainfill time
  • 20 cm TPR drain measurement: 2.5 minutes
  • 20 cm TPR fill measurement: 3.5 minutes
  • Supports Varian, Elekta, Siemens and CyberKnife® systems


  • Reference, Field, Scanning dosimetry 0f electron and photon beams
  • IMRT/VMAT Quality Assurance
  • Enhanced penumbra without loss of signal strength
  • Waterproof and fully guarded
  • Vented to provide air‑density correction and eliminate the need for radioactive stability check device
  • White chamber body gives a clear line of sight to the crosshairs and lasers during set up and set up verification


  • Reference class ionization chamber (IEC 60731)
    -Highest performance and stability level
    -Satisfies recommendations of dosimetry protocols (e.g. AAPM’s TG-51 and IAEA’s TRS-398)
  • Follows classic Farmer chamber design
    -Compatible with most existing slab phantoms and detector holders
  • Fully guarded, vented, and waterproof
    -Quick setup with no required wait time before measuring
  • White thimble
    -For improved setup and accuracy
    -Crosshairs and lasers easily discerned on thimble
  • Rotational orientation mark
  • Improved accuracy through consistent orientation that calibration laboratory uses


  • Reference, field, and scanning dosimetry of electron beams
  • TDD/TPS Commissioning and QA
  • Conforms to the design principles as stated by Dr. M. Roos
  • Meets AAPM TG‑51 and IAEA TRS‑398 requirements for low‑energy beams
  • Reference dosimeter can be used to cross calibrate field dosimeters
  • Meets highest standards of performance (IEC 60731)
  • Well‑guarded to reduce in‑scattering perturbation effects
  • Vented to provide air‑density correction and eliminate need for radioactive stability check device
  • White chamber body allows easy visualization of the setup relative to the crosshairs and lasers

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