NIfTI Image Annotation

For 3D Medical & Neuroscience AI

3D-Compatible Annotation for Advanced Medical Imaging

JTheta.ai supports full-featured annotation for NIfTI (.nii, .nii.gz) files — a must-have for teams
working with 3D volumetric data in radiology, neuroscience, and medical AI research. Our platform helps streamline the complex process of labeling MRI and fMRI datasets with accuracy, speed, and AI-assisted tools — all in a secure, browser-based environment.

Key Features

Our NIfTI Annotation Tool

3D Volume Support for NIfTI Files

● Load .nii and .nii.gz files directly
● Navigate across slices in axial, sagittal, and coronal views
● Full volume rendering for precise region labeling

Voxel-Level Annotation

● Create 3D masks or segmentations at voxel-level precision
● Useful for tumor detection, brain region mapping, and structural analysis

Smart Tools for Complex Anatomy

● Polygon, brush, lasso tools for contouring
● Adjustable transparency and slice comparison
● Overlays for ground-truth and predicted masks

AI Pre-Annotation (Optional)

● Use AI to auto-label brain regions or anomalies
● Fine-tune manually with full control

Research-Ready Exports

● Compatible with AI training frameworks (e.g., MONAI, PyTorch)
● Export masks, coordinates, and metadata

Use Cases for NIfTI Annotation

Who Should Use It?

Neuroscience & Radiology Researchers

AI Model Training Teams

University Medical Labs

Research Hospitals

Healthtech Startups

Why Use JTheta.ai for NIfTI Annotation?

JTheta.ai is designed with deep medical annotation needs in mind — offering a dedicated solution for teams working on 3D and high-resolution imaging datasets. No plugins, no setup, just pure browser-based power.