The narnar app1.5.0 - App Store

The ​narnar app for contrast-enhanced ultrasound (CEUS) allows researchers to process and quantify perfusion studies of various organs (e.g., heart, kidney, liver, skeletal muscle), acquired across a range of research protocols, including cardiac realtime, cardiac triggered and generic realtime studies.

​Key features include:

. Automatic and manual image alignment
. Color-coding of digitally-subtracted images
. Averaged and maximum intensity projection (MIP) imaging
. Quantification and modeling of microvascular blood flow from time-videointensity curves, calculated in real-time.
. Parametric imaging of blood flow and velocity

Version History Bug fixes and improvements. 1.5.0 08/04/2025 • DICOM File Support: Open DICOM files directly in the app to convert them to movies and start analyzing your data immediately.
• Edit Regions: Simply drag points in your region boundary to edit the region without needing to retrace.
• New Colormaps: Perceptually uniform colormaps make interpretation easier.
• Better File Management: Import batches of files simultaneously, export all files in your workspace, and sort your workspace several different ways.
• Parametric Imaging: Edit default ranges of A/β for parametric images in Settings to tailor your analysis to your data.
• Performance Improvements 1.4.0 06/11/2021 • New Settings: We rebuilt settings to allow for easy, comprehensive app configuration.
• Decolorize Images: For studies acquired in chroma, easily convert the study to grayscale in Settings.
• Linearize Images: Preview and adjust image linearization settings to accurately quantify log-compressed image data.
• Parametric Imaging: A lower-bounds slider allows filtering out of low parametric values.
• Performance Improvements: Includes faster motion-correction alignment. 1.3.0 12/23/2020 • Quantify six regions of interest.
• Automatic segmentation of myocardial regions for long axis views.
• Easily export a de-identified study movie file directly from the app.
• Added a lower threshold interface for color-coded digital subtraction.
• Additional bug fixes and performance improvements. 1.2.0 10/08/2020 • We added study types (cardiac realtime, cardiac triggered, and generic realtime) to make selecting frames faster and easier.
• Automatic selection of end-systolic frames: for cardiac realtime studies, an assistant can help you find all ES frames.
• Easily export a single frame image from your current work mode.
• Additional bug fixes and performance improvements. 1.1.0 09/01/2020 • Added the ability to view and export a color-coded image based on pulse interval.
• Fixed an issue related to clearing the current ROI.
• Fixed an issue related to recomputing parametric images when switching modes.
• Additional bug fixes and performance improvements. 1.0.8 05/02/2020 • Improved parametric imaging.
• Additional performance improvements. 1.0.7 03/05/2020 • Improved how study metadata is saved. 1.0.6 05/29/2019 • Adds support for the 11-inch iPad Pro. 1.0.5 01/08/2019 • We introduced several UI improvements. 1.0.4 12/03/2018 • Fixed an issue that would cause the app to crash in iOS 12. 1.0.3 10/05/2018 • Using the share button, time-videointensity raw data can now be exported as a text file in .csv format.
• Bug fixes and performance improvements. 1.0.2 07/20/2018 • General improvements to data accuracy.
• Decreased the minimum timing interval to 1 millisecond.
• The app now shows the correct number of significant digits for fit curve values.
• Added the ability to jump to the beginning or end of a movie using a keyboard shortcut.
• Added presentation mode to settings to show tap and swipe gestures when broadcasting the app.
• Added a new protocol for processing studies with a large number of images. 1.0.1 06/06/2018 1.0 01/24/2018