--- title: Image Calibration for X-ray Measurement description: Image Calibration for X-ray Measurement --- Get in touch: [844-937-7000](tel:844-937-7000) [![XDR Radiology](https://xdrradiology.com/wp-content/uploads/2022/05/logo_xdr.svg)](https://xdrradiology.com) - Products - [Intraoral Sensor](https://xdrradiology.com/products/sensor/) - [Imaging Software](https://xdrradiology.com/products/software/) - [Image Conversion](https://xdrradiology.com/products/conversion/) - Solutions - [Dental Groups](https://xdrradiology.com/solutions/dso/) - [Private Practices](https://xdrradiology.com/solutions/practices/) - [Federal Programs](https://xdrradiology.com/solutions/federal/) - [Institutions](https://xdrradiology.com/solutions/institutions/) - [Partners](https://xdrradiology.com/partners/) - [Customers](https://xdrradiology.com/customers/) - [Club](https://xdrradiology.com/club/) - [Shop](https://xdrradiology.com/shop/) - Support - [Knowledge Base](https://kb.xdrradiology.com/?hsLang=en-us) - [Technical Support](https://xdrradiology.com/support/) - [Download Center](https://xdrradiology.com/download/) [Talk to Sales](https://xdrradiology.com/contact) [Skip to content](https://kb.xdrradiology.com/image-calibration-for-x-ray-measurement-#main-content) English - United States Show submenu for translations ![](https://kb.xdrradiology.com/hs-fs/hubfs/Frame%209.png?width=865&height=138&name=Frame%209.png) - Home - Products - Pricing - Blog - Company Open main navigation Close main navigation - Home - Products - Pricing - Blog - Company - English - United States Show submenu for translations - [Contact us](https://xdrradiology.com/support/) [Contact us](https://xdrradiology.com/support/) How can we help you? - There are no suggestions because the search field is empty. 1. [XDR Radiology](https://kb.xdrradiology.com/?hsLang=en-us) 2. [Getting started](https://kb.xdrradiology.com/getting-started?hsLang=en-us) June 26, 2025 # Image Calibration for X-ray Measurement ## Learn to use the scaling button to calibrate the known length reference for measuring This process uses a reference object of known length within your X-ray image. **Step 1: Enlarge the Image** 1. In the "View exam" screen, **double-click** on the X-ray image you wish to calibrate. This will enlarge the image. **Step 2: Access the Scaling Tool** 1. Navigate to the **"Analyze" tab**. 2. Click on the **scaling button ![](https://kb.xdrradiology.com/hs-fs/hubfs/image-png-Jun-05-2025-09-28-17-8309-PM.png?width=44&height=31&name=image-png-Jun-05-2025-09-28-17-8309-PM.png)**. 3. An instruction window will appear. ![](https://kb.xdrradiology.com/hs-fs/hubfs/image-png-Jun-05-2025-09-29-43-9547-PM.png?width=368&height=367&name=image-png-Jun-05-2025-09-29-43-9547-PM.png) **Step 3: Choose Option B for known object length** 1. Within the instruction window, select **Option B**, which is labeled as "Apply length scaling only, using a reference". 2. You will notice that a field for "REF. Length in mm" is required. **Step 4: Input the Reference Length** 1. In the "REF. Length in mm" box, **type in the exact known length (in millimeters)** of the reference object that is visible in your X-ray image. 2. Click the **OK** button. **Step 5: Show Your Reference Length on the X-ray** 1. You will be prompted with a message: "Click and drag a line on the x-ray to orient grid". ![](https://kb.xdrradiology.com/hs-fs/hubfs/image-png-Jun-05-2025-09-35-55-4785-PM.png?width=521&height=376&name=image-png-Jun-05-2025-09-35-55-4785-PM.png) 2. On the X-ray image, **locate the reference object** you just provided the length for. 3. **Hold down the left mouse button** at one end of your reference object. 4. **Drag the cursor along the entire length** of the reference object. 5. **Release the mouse button** at the other end of your reference object. ![](https://kb.xdrradiology.com/hs-fs/hubfs/image-png-Jun-05-2025-09-38-30-9956-PM.png?width=521&height=374&name=image-png-Jun-05-2025-09-38-30-9956-PM.png) **Step 6: Confirm Calibration** 1. Once you release the mouse button, a grid of 1mm squares will be **overlaid on your image**. This visually confirms that the scaling has been applied based on your reference length. ![](https://kb.xdrradiology.com/hs-fs/hubfs/image-png-Jun-05-2025-09-50-14-2923-PM.png?width=519&height=360&name=image-png-Jun-05-2025-09-50-14-2923-PM.png) **Step 7: Remove the Grid (Optional)** 1. To remove the overlaid grid, simply **click on the scale button again**. **Your X-ray image has now been successfully calibrated and is ready to be measured!** - [Getting started](https://kb.xdrradiology.com/getting-started?hsLang=en-us) - [Troubleshooting](https://kb.xdrradiology.com/troubleshooting?hsLang=en-us) - [FAQs](https://kb.xdrradiology.com/faqs?hsLang=en-us) - [General](https://kb.xdrradiology.com/general?hsLang=en-us) - [Integrations](https://kb.xdrradiology.com/integrations?hsLang=en-us) - [Reports](https://kb.xdrradiology.com/reports?hsLang=en-us) - Home - Products - Pricing - Blog - Company [![](https://kb.xdrradiology.com/hs-fs/hubfs/Frame%209.png?width=865&height=138&name=Frame%209.png)](https://kb.xdrradiology.com/?hsLang=en-us) 11300 W Olympic Blvd Suite 710 Los Angeles, CA 90064 Copyright © 2025, XDR Radiology ![XDR Radiology](https://xdrradiology.com/wp-content/uploads/2025/10/xdr-white.png) XDR® offers dentist-driven radiology, imaging, and diagnostic tools that enhance patient care, improve efficiency, and drive practice success by bridging the gap between dentistry and technology. ##### BUSINESS HOURS Mon – Fri 6:30 AM – 5:00 PM PT Sat – Sun Closed [844-937-7000](tel:844-937-7000) ##### NEWSLETTER [SUBSCRIBE](https://xdrradiology.com/newsletter) ##### COMPANY - [About Us](https://xdrradiology.com/about/) - [Leadership Team](https://xdrradiology.com/leadership/) - [Careers](https://xdrradiology.com/careers/) - [Refer a Client](https://xdrradiology.com/refer/) - [Press Releases](https://xdrradiology.com/press/) - [Newsletter](https://xdrradiology.com/newsletter/) ##### SUPPORT - [Ownership Guide](https://xdrradiology.com/own-xdr/) - [Return Policy](https://xdrradiology.com/return-policy/) - [Warranty](https://xdrradiology.com/warranty/) [Terms of Use](https://xdrradiology.com/terms-of-use/) [Privacy Policy](https://xdrradiology.com/privacy-policy/) [Cookie Policy](https://xdrradiology.com/cookie-policy/) [Compliance & Transparency](https://xdrradiology.com/compliance/) [EULA](https://xdrradiology.com/eula/) [Patents](https://xdrradiology.com/patents/) This site is protected by reCAPTCHA and the [Google Privacy Policy](https://policies.google.com/privacy) and [Terms of Service](https://policies.google.com/terms) apply. © Copyright Cyber Medical Imaging, Inc dba XDR Radiology. All Rights Reserved.