Indeterminate lung nodules are frequently discovered on CT imaging - either during low-dose lung cancer screening or incidentally on CT studies obtained for other reasons.

The most up-to-date guidelines for managing lung nodules discovered during lung screening and incidentally discovered lung nodules are elegantly integrated in this app, in addition to a convenient tool for estimating the malignancy risk for any lung nodule.

This app was developed as a public service by two academic cardiothoracic radiologists and recognized medical educators, and is provided free of charge and free of advertising to the medical community.

What’s New

Version 7.4.1

---Version 7.4.1 Update---
• Redesigned graphic within Fleischner module for multiple ≥6 mm ground-glass nodules

---Version 7.4 Update ---
*** Support for ACR Lung-RADS version 1.1, introduced May 2019 ***
Management updates include:
• new recommendations for 20.0-29.9 mm ground-glass lung nodules on lung screening
• new recommendations for Lung-RADS 4B and 4X situations in setting of baseline screening and new nodules on follow-up screening
• support for nodule sizing in tenths of a millimeter during lung screening (Lung-RADS 1.1), instead of whole millimeters (Lung-RADS 1.0)

Other updates in this version:
• Updated Fleischner and Lung-RADS nodule workflow recommendations
• Improved date projection feature for follow-up CT scheduling
• Improved handling of solid and part-solid lung nodule growth situations in Lung-RADS
• More elegant user interface for Fleischner guideline module
• Substantially improved auto-scrolling after selection of different lung nodule characteristics

Ratings and Reviews

5.0 out of 5
12 Ratings

12 Ratings

carolineelised ,

Thank you developers

What a time saver. Simpler and quicker than the web from a desktop workstation. Our laminated print outs disappear within weeks of distributing the most current versions of recommendations.

Daren ,

Outstanding App

Just threw out my laminated card! App simple yet much richer info right at fingertips. Beautifully done.

radres1 ,

Fantastic app!

Amazing job! Very helpful!


66.4 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Medical/Treatment Information


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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