# The narnar app — For research in CEUS

> CEUS perfusion study processing and quantification tool for researchers. (iPhone/iPad app by narnar, LLC.)

- Source: https://appshunter.io/ios/app/the-narnar-app/id1338238999 (this page in markdown: same URL + `.md`)
- Developer: [narnar, LLC](https://appshunter.io/developer/1058713005)
- Category: Medical
- Price: Free
- Rating: 4.75/5 from 8 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 14.3 · 13 MB
- Languages: English
- Released: 2018-01-25
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/the-narnar-app/id1338238999/reviews.md

## What is The narnar app?

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

## Key features

- Perfusion study processing
- Quantification of microvascular blood flow
- Supports various organs and research protocols
- Automatic and manual image alignment
- Real-time time-videointensity curve analysis
- Parametric imaging of blood flow

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/the-narnar-app/id1338238999/reviews.md

### 3/5 — Newer version more work

*2021-04-06*

I liked the older version better where you can hit progressive after selecting a baseline and I got the values once I drew the regions of interest. Now I need to set heart rates and I can’t see the heart rate easily once imported into narnar.

**Developer response:** Thank you for your feedback! We'd love to help resolve the issue. Please reach out to us at support@narnar.co and we'll be happy to help.

## Frequently asked questions about The narnar app

### What is the narnar app used for?

The narnar app is designed for researchers to process and quantify perfusion studies acquired through contrast-enhanced ultrasound (CEUS). It assists in analyzing blood flow in various organs.

### What organs can the narnar app analyze?

The narnar app supports the analysis of perfusion studies for various organs, including the heart, kidney, liver, and skeletal muscle.

### Does the narnar app have ads?

No, the narnar app does not contain advertisements. It is a free application focused on research functionality.

### What research protocols does the narnar app support?

The narnar app accommodates a range of research protocols, including cardiac realtime, cardiac triggered, and generic realtime studies for CEUS.

### How accurate is the narnar app's quantification?

The app provides quantification and modeling of microvascular blood flow from time-videointensity curves, calculated in real-time. Users have rated the app highly at 4.7 stars.

### What devices is the narnar app available on?

The narnar app is currently supported on iPads, making it accessible for researchers using tablet devices.

### How often is the narnar app updated?

The narnar app was last updated on August 4, 2025, indicating ongoing development and support for the application.

### What is the age rating for the narnar app?

The narnar app has an age rating of 12+, suggesting it is suitable for users aged 12 and above.

## Version history (last 5 releases)

### 1.5.0 — 2025-08-04

Bug fixes and improvements.

### 1.4.0 — 2021-06-11

• 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

### 1.3.0 — 2020-12-23

• 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.

### 1.2.0 — 2020-10-08

• 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.

### 1.1.0 — 2020-09-01

• 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.

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## More apps by narnar, LLC

- [HF Log](https://appshunter.io/ios/app/hf-log/id1058713006)

All apps by narnar, LLC: https://appshunter.io/developer/1058713005

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*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 2026-08-25.*