- Upload film scans (1:31)
- Upload dose planes (0:39)
- Calibrate film lots (1:15)
- Obtain film doses (1:12)
- Image registration (1:25)
- Starshot test (0:30)
- Picket Fence (0:43)
- Coincidence light-radiation (1:08)
- Radiation field (0:55)
- Introduction
- Radiochromic film dosimetry
- The dosimetry system
- Image acquisition
- Lot calibration
- Film doses
- Uploads
- Film upload
- Dose plane upload
- Image analysis
- Analysis
- Registration
- Radiation therapy QA
- Gamma index analysis
- Starshot
- Picket Fence
- Coincidence light-radiation field
- Radiation field
- My Work
Radiochromic.com is a web application for quality assurance (QA) of medical radiation therapy systems. We implement state-of-the-art models and computations to make radiochromic film dosimetry and radiation therapy QA easy, fast, and accurate. Radiochromic.com is the result of continuous Research and Innovation.
Radiochromic.com users are Medical Physicists and Researchers. Read and follow these Tutorials carefully to obtain the most accurate results.
Radiochromic.com should work on all modern browsers.
Different protocols for radiochromic film dosimetry can be applied with Radiochromic.com. Here, we present our recommended protocol for accurate radiochromic film dosimetry. This protocol is based on:
The dosimetry system for radiochromic film dosimetry consists of:
- Gafchromic™ radiotherapy/radiology films
- a flatbed scanner
- scanner software
- Radiochromic.com
The recommended accessories are:
- gloves
- a guillotine
- a frame to center the film on the scanner
- a transparent compression (glass) sheet, when scanning in transmission mode

- Keep films in a dry and dark environment.
- Handle films with care, do not touch them without wearing gloves to prevent marks and scratches.
- Keep films away from light whenever possible.
- If films are submerged in water, minimize the time of submersion.
- Do not bend films when cutting them. Use sharp scissors or, preferably, a guillotine.
- Films should always keep the same orientation (i.e., portrait or landscape) on the scanner. Mark each film or film fragment to keep the orientation with the original film sheet and place them consistently on the scanner.
- Step 1 (optional):
- Prior to irradiation, scan the films that you will be using. If films are cut into fragments, scan them after cutting.
- Step 2:
- Irradiate the films.
- Step 3:
- Wait for the polymerization to stabilize and scan the films.
- Step 4:
- Upload the film scans to Radiochromic.com
- Step 1:
- Warm up the scanner (30-45 min).
- Step 2:
- Films, either entire films or film fragments, shall always keep the same orientation (i.e., portrait or landscape) on the scanner. Use the marks to place films consistently on the scanner.
- Step 3:
- Before acquisitions and after pauses, perform several (e.g., five) empty scans to stabilize the scanner lamp.
- Step 4:
- Center the film on the scanner. A convenient way to do so is with a frame.
- Step 5:
- Always use the same scanning mode, either reflection or transmission, that was used for the calibration.
- Step 6:
- Films shall be in perfect contact with the surface of the scanner bed to avoid curling. In transmission mode, place a 2-4 mm thick glass or PMMA sheet on top of the film. The positioning of the compression sheet shall be consistent; therefore, either cover or keep free the autocalibration area for all the scans. In reflection mode, the scanner lid itself compresses the film adequately.
- Step 7:
- Select the scanning area.
- Step 8:
- Acquire images with image type set to 48-bit RGB (16 bit per channel) and image processing tools turned off. Save the data as uncompressed TIFF files.
- Step 9:
- Perform four or five repeated scans and discard the first one for each film.


A calibration is necessary to convert the response of the dosimetry system into a dose distribution.
In this protocol, we expose a calibration procedure for external photon beams, yet, other methods, radiation sources, and applications are possible, provided that they observe four basic principles:
- Calibrations are valid for films from the same lot; therefore, each lot of films has to be calibrated at least once. However, since films slowly autopolymerize over time, it is advisable to repeat lot calibrations from time to time. Furthermore, since film response depends on humidity and temperature, more accurate film doses can be expected when calibration and film dose measurements are done together.
- Uncertainties in the absorbed reference doses will be translated into film dose uncertainties. Hence, it is important to maximize the accuracy of the reference doses. Generally, this can be achieved by irradiating at reference conditions and selecting ROIs with homogeneous doses.
- To avoid the lateral response artifact, the ROIs with reference doses should be centered on the scan.
- The reference doses should cover the range of doses of interest to prevent extrapolations.
- Step 1 (only with lateral correction):
- If the calibration will include the lateral correction, acquire the image of an entire unexposed film.
- Step 2:
- Cut a film into several (e.g., seven) strips with the longer side of the strips parallel to the lamp.
- Step 3 (optional):
- Scan the film fragments prior to irradiation.
- Step 4:
- Irradiate all but one of the strips with known (constant) doses. The doses should go from 0 Gy (the unexposed film fragment) to approximately 120 % of the maximum dose of interest. If the calibration will include the lateral correction, irradiate the strips with approximately homogeneous doses by using a beam with flatenning filter and a 25 cm × 25 cm field.
- Step 5:
- Scan all the calibration strips simultaneously. The irradiated areas of the strips should be centered on the scan.
- Step 6 (recommended):
- The unexposed strip can be used to correct inter-scan variations. We recommend keeping this fragment in the same position when scanning every film until a new calibration is made.
- Step 7:
- Click on CALIBRATION.
- Step 8:
- Select an existing study or insert a new one.
- Step 9:
- Insert an identifier for the calibration.
- Step 10:
- Select the calibration film.
- Optional: Use non-irr scan
- Unless unchecked, the calibration will make use of the information contained in the non-irradiated scan if it is present.
- Optional: Unflattened fields
- There is a special calibration mode for films irradiated with unflattened fields (e.g., Cyberknife™, ZAP-X™, FFF fields, ...).
- Step 11 (only with lateral correction):
- In order to apply lateral corrections, select an image of an entire unexposed film. Do not apply lateral corrections if the strips in your calibration film were not irradiated entirely with homogeneous doses.
- Step 12:
- Click on Reference doses. The ‘Dose ROIs’ menu will appear.
- Step 13:
- Associate reference doses to ROIs. The ROIs should be centered on the image (and on the scan). To provide enough statistics for the calibration while avoiding the lateral artifact, the length of the ROIs on the axis parallel to the lamp should be between 1-4 cm approximately. A minimum of three dose ROIs is needed.
- Step 14:
- Click on Request calibration.
- Step 15:
- The calibration is in progress. The result will be saved in My Work.







Radiochromic.com allows you to calibrate with fragments irradiated with unflattened fields.
- Step 1:
- Irradiate several fragments with known doses using unflattened fields.
- Step 2:
- Irradiate, scan and upload the film.
- Step 3:
- Click on CALIBRATION.
- Step 4:
- Select an existing study or insert a new one.
- Step 5:
- Insert an identifier for the calibration.
- Step 6:
- Select the calibration film.
- Step 7:
- Select Unflattened fields.
- Step 8:
- Click on Reference doses. The ‘Dose ROIs’ menu will appear.
- Step 9:
- Associate ROIs with their doses. A minimum of three dose ROIs is needed. The Dose ROIs for Unflattened fields are circles with known dose and diameter. For each ROI, introduce the diameter (d) and the dose (D), then select a rectangle that encloses completely the field. The application will find the center of the field and select a centered ROI with diameter d and dose D.
- Step 10:
- Click on Request calibration.
- Step 11:
- The calibration is in progress. The result will be saved in My Work.



Convert film pixel values into doses.
- Step 1:
- Calibrate the film lot.
- Step 2:
- Irradiate, scan and upload the film.
- Step 3:
- Click on DOSIMETRY.
- Step 4:
- Select an existing study or insert a new one.
- Step 5:
- Insert an identifier for the dosimetry.
- Step 6:
- Select the film.
- Step 7:
- Select the calibration.
- Optional: Noise reduction
- Apply a square median filter to the dose distribution to reduce the noise (a 3×3 square median filter is recommended).
- Step 8:
- Click on Response correction.
- Step 9 (recommended):
- Inter-scan correction: select an unexposed ROI in order to correct inter-scan variations. Use the central part of the scan to avoid the lateral artifact.
- Step 10 (optional):
- Dose rescaling: rescale doses in order to match the film dose with the known dose of a ROI. To apply dose rescaling, before the irradiation, cut a strip from the film to measure. This strip should be irradiated with a known homogeneous dose and scanned together with the rest of the film (and the unexposed strip). Finally, select a ROI of the exposed strip centered on the scan and introduce its dose.
- Step 11:
- Submit the request.
- Step 12:
- The dosimetry is in progress. The result will be saved in My Work.



Upload film scans to Radiochromic.com.
- Step 1:
- Click on FILM UPLOAD.
- Step 2:
- Select an existing study or insert a new one.
- Step 3:
- Insert an identifier for the film.
- Step 4 (recommended):
- Introduce film statistics.
- Step 5:
- Upload the film scans following irradiation.
- Step 6 (optional):
- Upload the film scans prior to irradiation.
- Step 7:
- Select film orientation. This is CRITICAL if lateral corrections are applied. Click on the arrows to select the direction of movement of the scanner lamp on the film scans.
- Step 8:
- Click on Upload scans. The average film scans will be calculated and uploaded. They will be saved in My Work.





Upload dose planes or image maps (e.g., EPID images) to Radiochromic.com.
Supported image formats:
- DICOM-RT dose 3D
- DICOM-RT dose 2D
- DICOM-RT image
- TIFF single channel
- Comma Separated Values
- XiO and Monaco (Elekta)
- iPlan (Brainlab)
- ADAC Pinnacle (Philips)
- OmniPro I'mRT (IBA) .opg file
- ADAC Pinnacle (Philips™):
- Planar Dose Computation -> Export Planar Dose -> Format: ASCII (Resolution: cm, Dose Units: Gy)
- Eclipse (Varian™):
- Export dose plane → Dose absolute, Planar dose: 512 points, Burn marker pixels: No
- iPlan (Brainlab™):
- Export → Dose → Select region, Dose Range and Step
- Monaco and XiO (Elekta™):
- Dose profile → Dose plane output
- MultiPlan (Accuray™):
- Plan → Export DICOM Data → Planar Dose
- OmniPro I'mRT/I'mRT+ (IBA™) - ASCII .opg file:
- Export Data → Generic ASCII File → Entire file
- PCRT 3D (Técnicas Radiofísicas™):
- Haces → Export → Placas → DICOM RT → Resolución: max.75 ppp, 16 bits
Import dose distributions in comma-separated values format. Doses should be in Gy and positions in mm. Follow the format of the example below:

- Step 1:
- Click on DOSE UPLOAD.
- Step 2:
- Select an existing study or insert a new one.
- Step 3:
- Insert an identifier for the dose plane.
- Step 4:
- Select the format of your image file.
- Step 5:
- If you choose DICOM-RT dose 3D, you must select a plane in the 3D dose matrix. To do so, select the DICOM coordinates of the plane (i.e., axis and position).
- Step 6:
- The upload button will appear. Select the dose plane file.
- Step 7:
- Once uploaded, the dose plane will be shown. Files are anonymized upon uploading. The dose plane can be found in My Work.


- Selection:
- Select one or two images for display.
- LUT:
- Select between different color lookup tables.
- Pixel units:
- Pixel units can be Gy, cGy, or pixel values.
- Alpha:
- Select the level of transparency/opacity of the image.
- Transformations:
- Apply affine transformations on the image. The order of transformations is: first Flip, then Rotation, and finally Translation. Math will multiply each pixel in Image A by the first parameter and add it the second parameter. Rotate in 90º steps by clicking on . Calculate the complement image by clicking on .
- Histogram:
- Select the range of values of interest. Examine the distribution of values with the histogram and the statistical analysis.
- Image calculator:
- Calculate the image which is the difference (i.e., A-B), relative difference (i.e., 100(A-B)/B), or addition (i.e., A+B) of images A and B.
- Global controls:
- Synchronize the range of values of images A and B.
- Drag:
- Use the middle mouse button to drag the Image A.
- ROI:
- Select Region of Interest with the left mouse button or with the ROI button .
- Zoom:
- Zoom/unzoom using the right mouse button or the zoom buttons: .
- Cursor:
- Read the image values under the cursor. Lock the cursor by clicking on .
- Profiles:
- Vertical and horizontal profiles for both images are shown. Image A is in red, Image B in green, and Image calculator in blue. Select the Profile export step and click on the Export button to export them in CSV format.
- Average profiles:
- Select a ROI and click on the Average button to obtain the average profile. Click on the Export button to export it in CSV format.






Register two images.
- Step 1:
- Load two images to register.
- Step 2:
- Pre-register both images by flipping, translating, and rotating Image A.
- Step 3:
- Click on the Registration icon .
- Step 4:
- Introduce the inputs of the Registration.
- Input / Apply Relative dosimetry:
- The registration translates and rotates Image A. By applying Relative dosimetry, it will also change the Math factor that multiplies A pixel values.
- Input / ROI (optional):
- Select the points that will be included in the registration with a ROI. Otherwise, the registration will use all the pixels on both images.
- Step 5:
- Click on Calculate. After few seconds, the registration will apply an affine transformation on Image A to register both images.
- Troubleshooting 1:
- If the images are too far away from each other or the rotation between them is too large, the registration will fail. Pre-register both images previously.
- Troubleshooting 2:
- The rotation may fail if one image has perfect circular symmetry.
- Troubleshooting 3:
- The registration expects similar dose distributions (on absolute or relative values). Registration of images with similar shapes but completely different pixel values may fail.


Compare dose distributions by evaluating the 2D γ-index.
- Step 1:
- Select evaluation (Image A) and reference (Image B) dose distributions.
- Step 2:
- Pre-register both images by flipping, translating, and rotating Image A. Alternatively, register them with the Registration functionality.
- Step 3:
- If necessary, scale or increment the doses of Image A by a fixed value with Transform / Math.
- Step 4:
- Open the Gamma index menu by clicking on the Gamma button .
- Step 5:
- Introduce the inputs of the Gamma.
- Input / Study:
- Select an existing study or insert a new one.
- Input / ID:
- Insert an identifier for the gamma comparison.
- Input / Normalization:
- Select between global and local gamma normalization. Global gamma can be normalized at Dmax or at a specified Dnorm.
- Input / Tolerance Dose:
- Select dose tolerance as a percentage of Dmax or Dnorm (global normalization) or of the local dose (local normalization).
- Input / Tolerance Distance:
- Insert the distance tolerance in mm.
- Input / Threshold:
- Insert the threshold dose. Points with doses lower than the threshold dose are excluded. The threshold dose is a percentage of Dmax or Dnorm.
- Input / Tolerance Distribution:
- Select the distribution from which global gamma dose tolerances and the threshold dose are calculated. Either the reference or the evaluation dose distribution can be used. (Default: Evaluation)
- Input / Fine registration:
- If selected, the automatic fine registration will improve your manual registration.
- Input / Relative dosimetry:
- If selected, the application will consider that the images contain relative doses.
In order to optimize the γ-index results, doses in Image A will be scaled.
Both the automatic scaling in relative dosimetry and the automatic fine registration use evolutionary algorithms to optimize the gamma index results. Repeated calculations can deliver slightly different results because of the random nature of evolutionary algorithms.
- Input / Maximum gamma:
- The maximum gamma value restricts the search space around each reference point. (Default: 2.0)
- Input / ROI (optional):
- The edges of the reference dose distribution have misleadingly high γ-index values. They are excluded by default with the automatic ROI. Alternatively, you can select a different ROI manually.
- Step 6:
- Click on Calculate. The gamma is in progress. The result will be saved in My Work.
- Step 7:
- You can change Gamma inputs to launch several Gamma Index calculations in parallel. For instance, you can change tolerances, apply relative dosimetry, etc., and click on Calculate again.
- In My Work:
- Click on the Fast Gamma button to re-evaluate Gamma Index comparisons.



Locate and obtain the dimensions of the radiation isocenter by analyzing a starshot test.
- Step 1:
- Load an image of a starshot test (e.g., film, EPID, CR, etc.).
- Step 2:
- The axes of the star should have lower values than the background. If this is not the case, click on the Complement button to calculate the complementary image.
- Step 3:
- Click on the Starshot button .
- Step 4:
- Introduce the inputs of the test.
- Input / Fiducial:
- Lock the cursor and align it with the fiducial/laser isocenter if marked on the image. Otherwise, lock the cursor in a position close to the center of the star.
- Input / ROI (optional):
- Prevent labels and other artifacts from interfering in the calculation by selecting a ROI.
- Step 5:
- Click on Calculate. Results will show after few seconds.
- Output / Isocenter coordinates:
- Position of the radiation isocenter.
- Output / Isocenter radius:
- Radius of the radiation isocenter.
- Output / Detected beams:
- Number of detected beams.
- Output / Distance fiducial-isocenter:
- Distance between fiducial and radiation isocenter.
- Step 6:
- Click on Report to get the results in a PDF file.
- Troubleshooting 1:
- The axes of the star have higher values than the background. Click on the Complement button to calculate the complementary image.
- Troubleshooting 2:
- The cursor is far from the center of the star. Lock the cursor in a position closer to the isocenter.
- Troubleshooting 3:
- Excessive noise, large beam widths, beams too close to each other, image artifacts, etc., can induce errors in the location of the beams.






Check the accuracy of MLC positions with the Picket Fence test.
- Step 1:
- Load an image of a picket fence test (e.g., film, EPID, CR, etc.).
- Step 2:
- The beam lines should be horizontal and have higher values than the background. If this is not the case, transform the image by rotating it and/or calculating the complementary image.
- Step 3:
- Click on the Picket Fence icon .
- Step 4:
- Introduce the inputs of the test.
- Input / MLC:
- Select the MLC model.
- Input / Auto-correct Translation:
- Automatically remove any small offset of the isocenter position on the x-axis. (Default: checked)
- Input / Auto-correct Rotation:
- Remove any small rotation of the beam lines. (Default: checked)
- Input / Isocenter:
- Introduce the position of the isocenter on the X-axis either manually or by locking the cursor near the center of the MLC on the X-axis. Use this field to introduce EPID offsets with respect to the isocenter.
- Input / Distance scaling:
- Introduce distance scaling (i.e., Source to Imager Distance / Source to Axis Distance). (Default: 1.0)
- Input / Tolerance:
- Tolerance for errors of leaf positions. (Default: 0.5 mm)
- Input / Leaf end threshold:
- By default, the leaf end is located at the position of the 50% isodose between the peak of the signal and the background (i.e., the FWHM), which is appropriate when working with doses. You can change the threshold level to locate the leaf end more accurately when pixel values do not correspond to doses (e.g., with EPIDs). (Default: 50 %)
- Input / ROI (optional):
- Delineate the ROI (i.e., the MLC region).
- Step 5:
- Click on Calculate. Results will show after few seconds.
- Output / Passing rate:
- Percentage of leaf positions within tolerance.
- Output / Mean absolute error:
- Mean absolute leaf position error.
- Output / Maximum absolute error:
- Maximum absolute leaf position error.
- Step 6:
- Click on Report to get the results in a PDF file.
- Troubleshooting 1:
- The beam lines are vertical. Transform the image by rotating it.
- Troubleshooting 2:
- The beam lines have lower values than the background. Click on the Complement button to calculate the complementary image.






Verify the coincidence of light and radiation field.
- Step 1:
- Load an image of a light-radiation test.
- Step 2:
- Click on the Light-radiation icon .
- Step 3:
- Introduce the inputs of the test.
- Input / Field definition:
- Select between Inflection points and FWHM. The FWHM follows the standard definition of radiation field as delimited by the 50% isodose of the beam profile. However, this definition requires that films are converted into dose distributions. When working with pixel values, an approximation to the radiation field can be obtained by the inflection points of the profiles.
- Input / Nominal field size:
- Introduce the nominal dimensions of the field on each semiaxis.
- Input / Light points:
- Introduce the points that mark the limits of the light field on each semiaxis. Enable them in Inputs and place them on the canvas. Light points shall correspond to the correct semiaxis and be located on the crosshair.
- Input / ROI:
- Select a ROI that encompasses the radiation field.
- Step 4:
- Click on Calculate. Results will show after few seconds.
- Output / Light-radiation angle:
- Rotation between light and radiation field.
- Output / Light-radiation displacement:
- Distance between radiation and light field. It is positive/negative when the radiation field is larger/smaller than the light field.
- Output / Crosshair-light distance:
- Light field dimensions on each semiaxis.
- Output / CAX coordinates:
- For symmetric nominal field sizes only: central axis coordinates of the radiation field.
- Output / CAX distance to crosshair:
- For symmetric nominal field sizes only: distance between the crosshair and the central axis.
- Step 5:
- Click on Report to get the results in a PDF file.
- Troubleshooting 1:
- The light points shall correspond to the correct semiaxis and be located on the crosshair.
- Troubleshooting 2:
- The ROI shall encompass the radiation field, not extend beyond the image, and avoid labels and other artifacts.






Analysis of the radiation field, including field size, central dose statistics, flatness, symmetry, penumbra, etc.
It can analyze rectangular and circular fields (e.g., cones) of WFF photons, FFF photons, and electron beams.
It is the QA test of choice for also measuring small fields and output factors.
Available protocols for flatness and symmetry:
- Photons WFF:
- WFF IEC / Elekta™: "IEC 60976. Medical electrical equipment - Medical electron accelerators - Functional performance characteristics." IEC (2007).
- WFF TG45 / Varian™: Biggs, P.J., et al. "AAPM code of practice for radiotherapy accelerators: report of AAPM Radiation Therapy Task Group No. 45." Medical Physics 21 (1994): 1093.
- Photons FFF:
- FFF Elekta™: "Versa HD Product Data." Elekta AB.
- FFF Varian™: "TrueBeam System Specifications." Varian Medical Systems, Inc. (2011)
- FFF AERB of India: Sahani, G., et al. "Acceptance criteria for flattening filter-free photon beam from standard medical electron linear accelerator: AERB task group recommendations." Journal of Medical Physics/Association of Medical Physicists of India 39.4 (2014): 206.
- Electrons:
- Electrons IEC / Elekta™: "IEC 60976. Medical electrical equipment - Medical electron accelerators - Functional performance characteristics." IEC (2007).
- Electrons TG45 / Varian™: Biggs, P.J., et al. "AAPM code of practice for radiotherapy accelerators: report of AAPM Radiation Therapy Task Group No. 45." Medical Physics 21 (1994): 1093.
- Step 1:
- Load an image with a dose distribution of a rectangular or circular radiation field.
- Step 2:
- Click on the Radiation field icon .
- Step 3:
- Introduce the inputs of the test.
- Input / Protocol for flatness and symmetry:
- If you want to calculate flatness and symmetry, select one of the available protocols.
- Input / Field geometry:
- Select between rectangular and circular field.
- Input / Apply field rotation:
- Apply rotations while recognizing the rotation field. Do not apply rotations on fields with circular symmetry (e.g., cones and very small fields). (Default: checked)
- Input / Central dose diameter:
- Central dose statistics are measured for a circle with this diameter centered on the field. (Default: 1.0 mm)
- Input / Averaging area:
- Side of the area that averages pixel values for flatness and symmetry calculations. (Default: 10 mm)
- Input / Field definition isodose:
- Isodose that delimits the radiation field. (Default: 50%)
- Input / Nominal field size:
- Nominal field size dimensions.
- Input / Crosshair coordinates (optional):
- Lock the cursor and align it with the crosshair if the crosshair is marked on the image.
- Input / ROI (optional/mandatory):
- Select a ROI that encompasses the radiation field. This input is mandatory when applying the FFF AERB protocol.
- Step 4:
- Click on Calculate. Results will show after few seconds.
- Output / Radiation field center:
- Coordinates of the center of the radiation field.
- Output / Radiation field size:
- Dimensions of the radiation field.
- Output / Radiation field rotation:
- Rotation of the radiation field.
- Output / Central dose statistics:
- Statistics of the distribution of values within the central dose diameter.
- Output / CAX distance to crosshair:
- If the crosshair is introduced: distance between the crosshair and the central axis.
- Output / Penumbras:
- For rectangular fields except for FFF Elekta™ and FFF Varian™: distance between the 80-20% isodoses on each semiaxis.
- Output / Flatness and Symmetry:
- According to the different protocols, the outputs for flatness and symmetry are:
- Photons WFF IEC / Elekta™:
- Flatness
- Symmetry
- Maximum ratio of absorbed dose
- Photons WFF TG45 / Varian™:
- Flatness in the X and Y axes and both diagonals.
- Symmetry in the X and Y axes and both diagonals.
- Photons FFF Elekta™:
- Symmetry
- Isodose values on each semiaxis at different distances from the CAX.
- Photons FFF Varian™:
- Flatness
- Symmetry
- Isodose values on each semiaxis at different distances from the CAX.
- Distances from the CAX to different isodoses on each semiaxis.
- Photons FFF AERB of India:
- Symmetry
- Distances from the CAX to different isodoses on each semiaxis.
- Electrons IEC / Elekta™:
- Flatness: distance between the 90% isodose and the edge on each semiaxis and the diagonals.
- Symmetry
- Maximum ratio of absorbed dose
- Electrons WFF TG45 / Varian™:
- Flatness in the X and Y axes and both diagonals.
- Symmetry in the X and Y axes and both diagonals.
- Step 5:
- Click on Report to get the results in a PDF file.
- Troubleshooting 1:
- The image must contain a dose distribution. If the image is a film scan, pixel values should be converted into doses.
- Troubleshooting 2:
- Rotation recognition may fail if the field has circular symmetry.
- Troubleshooting 3:
- The sample of central dose pixels may be empty if the central dose diameter is too small. As a consequence, the program will return an error.




All your uploaded and calculated data are in My Work.
- Open My Work:
- Click on the Radiochromic.com logo to open My Work.
- List of items:
- Select a list of items according to Study and Category.
- Archive / Restore studies:
- Archived Studies are only accessible in My Work.
- Edit studies:
- Rename a study.
- Open My Item:
- Click on an Item from the list and examine it.
- In My Item:
- Open the item in Analysis, Download it, print a Report or ask for Support from My Item.



