Voxel Calculator
Estimate in-plane pixel size, slice or partition thickness, and voxel volume for 2D and 3D acquisitions.
MRI EDUCATION + PROTOCOL TOOLS
Clarity for the scanner room.
MRI Toolkit brings practical calculators, protocol concepts, and approachable MRI physics together in one focused iPhone app for technologists and students.
Built for MRI learnersFocused calculatorsNo account required
Voxel1.0 × 1.0 × 3.0 mm
SequenceT2 FSE / TSE
PURPOSE-BUILT
From a quick calculation to a physics refresher, every feature is designed to make MRI concepts easier to understand.
THE TOOLKIT
Useful at a glance.
Simplified educational estimates help users think through the relationships that shape image quality and acquisition time.
Scan Time Calculator
Estimate acquisition time and see how TR, phase steps, NEX, and echo train length affect the result.
Protocol Optimizer
Explore educational tradeoffs among resolution, signal-to-noise ratio, and scan time.
Sequence Acronyms
Keep common MRI sequence names and vendor terminology within quick reach.
LEARN THE “WHY”
MRI Physics Foundations
Start with hydrogen-1, the main magnetic field, net magnetization, precession, the Larmor relationship, RF excitation, and resonance—then reinforce the ideas with a quiz.
Original explanationsInteractive examplesKnowledge checks
FOUNDATION 01
f = γ̄B₀
The precession frequency of hydrogen increases in direct proportion to magnetic field strength.
1.5 T≈ 63.9 MHz
3.0 T≈ 127.7 MHz
ABOUT THE COMPANY
Created for people learning and working in MRI.
MRI Toolkit LLC is an independent education and software company based in Magnolia, Texas. We create focused resources that make technical MRI concepts more approachable without losing sight of real-world scanning practice.
Our goal is simple: build clear, useful tools that help MRI technologists and students strengthen their understanding and make more informed protocol conversations.
PRIVACY + RESPONSIBLE USE
Your calculations stay on your device.
No account required
MRI Toolkit does not require registration or a user profile.
No advertising or tracking
The app does not include ads, behavioral tracking, or third-party analytics.
Local calculator processing
Calculator entries are processed on the device and are not sent to the developer.
Educational use only.
MRI Toolkit is not a medical device and does not diagnose, treat, prevent, or monitor any condition. Calculations and protocol suggestions are simplified educational estimates. Always follow scanner documentation, institutional policy, device labeling, and qualified clinical judgment. Never enter patient-identifying or protected health information.
SUPPORT