# Y90 Dosing — Y90 Dosimetry Reference > Y90 microsphere dosimetry calculation and treatment planning reference tool. (iPhone/iPad app by ABHISHEK KETAN GOSWAMI.) - Source: https://appshunter.io/ios/app/y90-dosing/id6798447310 (this page in markdown: same URL + `.md`) - Developer: [ABHISHEK KETAN GOSWAMI](https://appshunter.io/developer/6798447312) - Category: Education, Medical - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 17+ - Requires: iOS 16.4 · 40 MB - Languages: American English - Released: 2026-08-18 - Data updated: 2026-09-30 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/y90-dosing/id6798447310/reviews.md ## What is Y90 Dosing? Y90 Dosing applies published yttrium-90 microsphere dosimetry formulations to values you enter, and shows the working. Glass (TheraSphere) and resin (SIR-Spheres), each computed with its own manufacturer's published constants. Built by an interventional radiology fellow for use alongside treatment planning, not in place of it. WHAT IT DOES Calculate activity across one or many perfused territories, each configured independently as single compartment or partition. Enter volumes, T/N ratio, lung shunt fraction, and target dose; see the resulting activity with every step exposed. Order vials against a real calendar. For glass, the vial grid decays each candidate from its calibration date to your treatment date and time, so you can see what a 3 GBq vial actually delivers on a Wednesday afternoon rather than working it out by hand. Or set the date and time you need and see the vial activity to order for it. For resin, choose the ordering day and see the volume to draw, the vials needed, and the sphere count. Save cases and export a one-page PDF summarizing the plan, the vial order, and every input that produced it. SCOPE Y-90 microspheres: glass (TheraSphere) and resin (SIR-Spheres). Manual numeric entry only. No BSA dosing, no voxel or DICOM dosimetry, no overlapping territories. IMPORTANT This is an educational and verification tool for qualified professionals trained in radioembolization. It is not a medical device, is not FDA cleared or approved, and must not be used as the sole basis for any clinical decision. Every result must be independently verified against current product labeling and institutional protocol. Not affiliated with, endorsed by, or connected to Boston Scientific or Sirtex. TheraSphere® is a registered trademark of Boston Scientific. SIR-Spheres® is a registered trademark of Sirtex SIR-Spheres Pty Ltd. Free. No ads, no analytics, no accounts. Everything stays on your device. ## Key features - Calculate Y90 activity for multiple territories - Independent compartment configuration - Calendar-based vial decay calculation - Save and export case summaries - Supports glass microspheres (TheraSphere) ## Frequently asked questions about Y90 Dosing ### What is Y90 Dosing used for? Y90 Dosing is an educational and verification tool for qualified professionals in radioembolization. It helps calculate Yttrium-90 glass microsphere activity and order vials based on published dosimetry formulations. ### What types of microspheres does Y90 Dosing support? Y90 Dosing specifically supports glass microspheres, such as TheraSphere. It does not support resin microspheres, BSA dosing, voxel or DICOM dosimetry, or overlapping territories. ### Can Y90 Dosing be used as a medical device? No, Y90 Dosing is not a medical device and is not FDA cleared or approved. It is intended for use alongside treatment planning, not in place of it, and all results must be independently verified. ### How does Y90 Dosing handle vial ordering? The app features a vial grid that decays candidate vials from their calibration date to your treatment date and time. This allows you to see the actual delivered activity of a vial on a specific day and time. ### What information can be exported from Y90 Dosing? You can save cases and export a one-page PDF summary. This export includes the treatment plan, vial order details, and all input parameters used to generate the results. ### Does Y90 Dosing have ads? No, Y90 Dosing is ad-free. The application also does not collect analytics or require accounts, with all data remaining on your device. ### What is the age rating for Y90 Dosing? Y90 Dosing has an age rating of 17+. This is likely due to the specialized medical nature of the application and its target audience of healthcare professionals. ### How often is Y90 Dosing updated? The latest version of Y90 Dosing is 1.0.1, which was last updated on August 22, 2026. This indicates recent development and maintenance for the application. ## Version history (last 4 releases) ### 1.2.1 — 2026-09-18 The guided tutorial has been rebuilt as four chapters: calculating an activity, choosing a glass vial, choosing a resin vial, and saving a case. Each one walks through the real screens and highlights the control it's describing. This replaces an earlier walkthrough that had fallen out of step with the app — parts of it pointed at a vial grid that has since moved into its own picker. There's also a new launch screen. ### 1.2.0 — 2026-09-08 Resin microspheres (SIR-Spheres) are now supported alongside glass (TheraSphere). Choose the product per case. Each is computed with its own manufacturer's published constants and its own labeled liver tissue density, so the two are not one calculation with a different label. Resin vial ordering works the way resin is ordered: pick the day relative to calibration and see the volume to draw, the vials needed, and the sphere count. The PDF carries a resin order table written for whoever places the order. FIXED DATE ORDERING Glass vial ordering gains a fixed date mode: set the treatment date and time you need, and see the vial activity to order for it rather than working back from the standard sizes. SETTINGS Settings are now grouped into General, Glass, and Resin. New options: default product, default timezone, default resin vial and picker view, liver tissue density for each product, and how the difference from target is shown — as a figure, a percentage, or not at all. A reset returns every preference to its default without touching your saved cases. ### 1.0.1 — 2026-08-22 Updated microsphere counts, now derived from Boston Scientific's current published sphere-count range; displayed counts have changed accordingly. New: specific activity at treatment, shown per vial and on the PDF, with the calibration constant adjustable per case. Major ranked list improvements: - Thursday-calibrated vials now included - Normal liver dose shown for partition territories - Select a vial directly from the list - Filters by calibration, day, time, vial size, specific activity, and dose limits, with saveable filter presets Custom vial size calculations now accepted up to 100 GBq. ### 1.0 — 2026-08-18 No release notes. ## Apps similar to Y90 Dosing | App | Rating | Price | Category | | --- | --- | --- | --- | | [Medical Wysdom](https://appshunter.io/ios/app/medical-wysdom/id6761029180) | 5.0 (4) | Free | Education | | [GEST Events](https://appshunter.io/ios/app/gest-events/id1617272031) | 5.0 (4) | Free | Education | | [Vervee Academy](https://appshunter.io/ios/app/vervee-academy/id6802546818) | — | Free | Education | | [SIR Annual Meeting](https://appshunter.io/ios/app/sir-annual-meeting/id1553344232) | 4.4 (49) | Free | Education | | [RadLingo by NavRad](https://appshunter.io/ios/app/radlingo-by-navrad/id6764175285) | 5.0 (13) | Free | Education | | [Ora - Med School Prep](https://appshunter.io/ios/app/ora-med-school-prep/id6484319369) | 5.0 (6) | Free | Education | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-30.*