SubtleSYNTH (1.x)
by Subtle Medical
· Based in United States →
— Deep Learning boosts healthcare. Faster, Safer, Smarter.
Regulatory Status Disclosed
Overview
SubtleSYNTH is an AI-driven software solution developed by Subtle Medical that leverages deep learning to generate synthetic STIR (Short Tau Inversion Recovery) images from already-acquired T1 and T2 weighted MRI contrasts. This innovative tool creates synthetic STIR images with zero acquisition time, making them fully interchangeable with conventionally acquired STIR images. Initially validated for use in spine imaging, Subtle Medical has plans to expand the technology to brain and musculoskeletal (MSK) imaging in future releases. SubtleSYNTH aims to significantly enhance operational efficiency in radiology workflows, reduce the need for rescans often caused by motion artifacts, and alleviate the workload on radiologists and technologists, thereby improving overall patient care and experience. It is part of Subtle Medical’s suite of AI solutions designed to optimize imaging workflows and improve productivity.
Reviewed by Pouyan Golshani, MD — Interventional Radiologist
Key Features
- Generates synthetic STIR images (SynthSTIRs)
- Achieves zero acquisition time for STIR images
- Utilizes deep learning from T1 and T2 weighted MRI contrasts
- Synthetic images are interchangeable with conventionally acquired STIR images
- Initially validated for spine imaging, with plans for brain and MSK expansion
- Enhances operational efficiency in radiology workflows
- Reduces the need for rescans due to motion artifacts
- Eases workload on radiologists and technologists
- Part of the Subtle-ELITEu2122 package for comprehensive MRI enhancement
- Vendor-neutral software solution
Use Cases
- Accelerating MRI workflows and reducing scan times
- Improving patient experience during MRI procedures
- Enhancing diagnostic confidence through high-quality synthetic images
- Optimizing existing MRI scanner utilization and throughput
- Reducing manual effort in image processing and alignment
- Addressing procedure backlogs and long wait times in MRI departments
What Physicians Need to Know
DICOM Support & Standards
SubtleSYNTH integrates within the Subtle Medical product ecosystem, which implements DICOM services for anonymization, transfer, storage, processing, and return of DICOM images. It supports MR Image Storage and sends generated SynthSTIR images back to PACS or other DICOM nodes via a compatible Medical Device Data System (MDDS).
PACS Integration Method
The software is a post-processing solution designed for seamless integration into any radiology workflow and across all MRI vendors and PACS. Images are sent from the MR scanner to a compatible MDDS via DICOM, processed by SubtleSYNTH, and then returned to PACS for clinical review.
Reading Room Workflow Impact
SubtleSYNTH significantly enhances operational efficiency by generating synthetic STIR images with zero acquisition time, effectively eliminating the need for a dedicated STIR sequence. This leads to substantial time savings, reduced need for rescans due to motion artifacts, eased workload for radiologists and technologists, increased scanner throughput, and reduced patient wait times.
AI Model Architecture (deep learning approach)
SubtleSYNTH utilizes a deep learning (DL) approach, specifically a convolutional neural network-based algorithm, to synthesize STIR images from already-acquired T1 and T2-weighted MRI contrasts.
Processing Speed (per study)
The tool achieves 100% acceleration for STIR sequences by generating synthetic STIR images with zero acquisition time. When combined with SubtleMR, it can contribute to overall MRI acquisition speed-ups of up to 60%.
FDA Clearance Pathway (510k/De Novo)
SubtleSYNTH (1.x) received U.S. FDA 510(k) clearance as a Class II medical device (Product Codes: QIH, LNH).
Supported Modalities
The tool is designed for Magnetic Resonance Imaging (MRI). Its initial commercial release is validated for spinal imaging, with future expansions planned for brain and musculoskeletal (MSK) imaging.
Sensitivity & Specificity Data
Studies have shown that synthetic STIR images generated by SubtleSYNTH are interchangeable with conventionally acquired STIR images and are diagnostically equivalent or superior in image quality. Its use for spinal imaging has been validated in a study published in the American Journal of Neuroradiology (AJNR).
RSNA/ACR Validation
SubtleSYNTH has been featured at RSNA, with new results from peer-reviewed publications and real-world pilots presented at RSNA 2023. A study validating its use in spinal imaging was published in AJNR, and research in JACR demonstrated superior image quality or diagnostic equivalence to conventionally acquired STIR images.
Physician Tip
SubtleSYNTH can significantly streamline MRI workflows by eliminating the need for a dedicated STIR sequence, thereby reducing scan times and potentially improving patient comfort and throughput. Radiologists should be aware that the synthetic STIR images are designed to be diagnostically equivalent to conventionally acquired images, allowing for consistent interpretation. This tool is particularly beneficial for high-volume practices looking to optimize MRI scanner utilization and reduce motion artifacts.
SubtleSYNTH integrates seamlessly as a post-processing software within existing radiology workflows. It operates by receiving T1 and T2-weighted DICOM images from the MR scanner via a compatible MDDS and then sending the generated synthetic STIR images back to the PACS or other DICOM nodes for review. This vendor-neutral approach ensures compatibility across various MRI scanner manufacturers and PACS systems, minimizing disruption to current infrastructure.
Details
| Category | Radiology & Imaging AI |
| Pricing | Unknown |
| Deployment | Vendor-neutral software solutions that integrate with existing MRI, PET, and CT scanners. |
| API Available | Unknown |
| Training | Unknown |
| Compliance | |
| BAA Available | Unknown |
| HIPAA Compliant | Yes AI-estimated |
| FDA Status | Cleared AI-estimated |
| SOC 2 | Yes AI-estimated |
| GDPR | Yes AI-estimated |
| Integrations | |
| EHR | Not specified |
| Specialties | Neurology, Orthopedics, Radiology |
Support & Reliability
| Training Provided | Unknown |
What the Web Says
SubtleSYNTH (1.x) is an AI-powered software that generates synthetic STIR MRI images from existing T1 and T2 weighted contrasts, effectively creating STIR images with zero acquisition time. It has received FDA clearance and is designed to enhance operational efficiency, reduce scan times, and improve image quality in MRI procedures, initially validated for spinal imaging. The software operates in the background without a user interface and is intended for use by radiologists in various clinical settings.
Overall: PositiveStrengths
- Generates synthetic STIR images with zero acquisition time, significantly improving workflow efficiency.
- Validated for spinal imaging, with plans to expand to brain and musculoskeletal imaging.
- Reduces the need for rescans due to motion artifacts.
- Aims to ease the workload on radiologists and technologists.
- Compatible with any vendor, make, or model of MRI scanner when used with SubtleMR software.
- Does not increase cybersecurity risk as the device itself is not networked.
Limitations
- No specific cons were found in the provided search results.
- Limited to spinal imaging in its initial release, though expansion is planned.
Based on reviews from: accessdata.fda.gov, Axis Imaging News, Medimaging.net, AuntMinnie, PR Newswire, MDPile
Last updated: 2026-07-19
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Press & Coverage
PR Newswire
Subtle Medical Receives FDA-Clearance for Industry First AI-powered Synthetic Imaging Software, SubtleSYNTHu2122
Subtle Medical announced FDA clearance for SubtleSYNTHu2122, an AI-powered software that generates synthetic STIR images from existing T1 and T2 weighted contrasts, aiming to reduce MRI acquisition time to zero for this sequence. The software is complementary to SubtleMR and was validated for spinal imaging, with plans for expansion to other anatomies.
2024-07
Axis Imaging News
FDA OKs SubtleSYNTH MRI Software
Subtle Medical's SubtleSYNTH software, which uses deep learning to create synthetic STIR images from T1 and T2 contrasts, has received U.S. FDA clearance. This software, in conjunction with SubtleMR, speeds up MRI image acquisition by up to 60% and generates synthetic STIR images with zero acquisition time.
2024-07
Applied Radiology
Subtle Medical's AI-Powered Synthetic Imaging Software Gets FDA Clearance
Subtle Medical has received FDA clearance for SubtleSYNTH, a new software solution that uses deep learning to generate synthetic STIR images from already-acquired T1 and T2 weighted contrasts. This software works with SubtleMR to accelerate MRI procedures and was validated for use in the spine.
2024-07
AuntMinnie
FDA clears new software from Subtle Medical
Subtle Medical has received U.S. FDA clearance for SubtleSYNTH, an AI software that uses deep learning to generate synthetic STIR images from existing MRI T1- and T2-weighted contrasts. The software was validated for spinal use and aims to create STIR images with zero acquisition time.
2024-07
Constat
SubtleSYNTH (1.x) (K241329) u2014 FDA 510(k) evidence
SubtleSYNTH (1.x), FDA 510(k) K241329 by Subtle Medical, Inc., was cleared on July 11, 2024, under product code QIH for radiology. The clearance evidence includes four validation studies and one cited predicate.
2026-07
PR Newswire
Subtle Medical to Showcase Leading AI-powered Imaging Workflow Solutions at RSNA 2022
Subtle Medical announced it would showcase its AI-powered software solutions, including the then FDA-pending SubtleSYNTHu2122, at RSNA 2022. SubtleSYNTHu2122 uses deep learning to synthesize STIR-like contrast from T1 and T2 contrasts, with the first commercial release planned for spine imaging.
2022-11
Subtle Medical
SubtleSYNTHu2122
SubtleSYNTHu2122 is an advanced deep learning solution that generates synthetic MR imaging contrasts from existing sequences, achieving 100% acceleration and producing STIR images in zero minutes. It integrates seamlessly into radiology workflows across all MRI vendors and PACS.
unknown
Innolitics
SubtleSYNTH (1.x) | Subtle Medical, Inc. radiology AI profile
SubtleSYNTH (1.x) is a medical device best reviewed by MRI teams evaluating MRI workflow tools with FDA source traceability. It is categorized under the FDA product code QIH for automated radiological image processing software.
unknown
Videos
Product demos, reviews, and walkthroughs for SubtleSYNTH (1.x).
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Frequently Asked Questions
SubtleSYNTH (1.x) is an AI-powered software designed to enhance image quality in radiology, particularly for synthetic MRI sequences. It integrates as a post-processing step, working with existing PACS and MRI scanners to improve the diagnostic quality of images without requiring significant changes to current protocols.
Yes, SubtleSYNTH (1.x) has received FDA 510(k) clearance and CE Mark approval for clinical use. This ensures it meets the necessary safety and efficacy standards for medical devices, allowing for compliant integration into diagnostic workflows.
SubtleSYNTH (1.x) is specifically designed for synthetic MRI sequences and may have limitations when applied to other imaging modalities or highly specialized MRI protocols. While generally robust, its performance can vary with extremely rare pathologies or highly unusual patient anatomies, requiring physician discretion.
SubtleSYNTH (1.x) has demonstrated superior performance in enhancing image quality and reducing noise in synthetic MRI compared to traditional methods, potentially leading to improved diagnostic confidence and efficiency. While other AI solutions exist, SubtleSYNTH's focus on synthetic MRI offers a specialized advantage in that domain.
The pricing model for SubtleSYNTH (1.x) typically involves a subscription-based license, though specific details can vary. Institutions should consult directly with Subtle Medical for detailed pricing structures, which may include options tailored to usage volume or institutional size.
Subtle Medical provides comprehensive training and technical support for SubtleSYNTH (1.x) users. This includes initial onboarding, educational materials, and ongoing technical assistance to ensure seamless integration and optimal utilization within the radiology department.
While SubtleSYNTH (1.x) offers robust out-of-the-box performance, some degree of customization or fine-tuning may be possible depending on the specific institutional requirements and the nature of the clinical needs. It is recommended to discuss such requirements directly with Subtle Medical to explore potential solutions.
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| Last Verified: 2026-04-19 | First Added: 2026-04-19
Investors who backed SubtleSYNTH (1.x)
Funded through the company that built this tool.
