SubtleHD (1.x)
by Subtle Medical
· Based in United States →
— Deep Learning boosts healthcare. Faster, Safer, Smarter.
Contact for pricing
Regulatory Status Disclosed
Overview
SubtleHD (1.x) by Subtle Medical is an AI-powered software designed for image enhancement across MRI, PET, and CT modalities.
What it does:
- For MRI (SubtleHD™(MR)), it applies denoising and sharpening to images, which can enable faster scan protocols. It is compatible with various MRI scanners and applicable to all body parts, contrasts, and both 2D and 3D imaging.
- For PET (SubtleHD™(PET)), the software enhances low-count PET imaging by applying denoising and sharpening. It supports all FDA-approved radiotracers and can include adjustable denoising levels.
- For CT (SubtleHD™(CT)), it reduces noise and aims to improve low contrast detectability.
Who it is for:
- This tool is intended for radiologists and technologists in imaging centers, clinics, and hospitals.
- It is designed for use with existing MRI, PET, PET/CT, and PET/MR, and CT scanners.
How it fits a clinical or practice workflow:
- SubtleHD integrates with existing imaging scanners and workflows.
- The enhanced images coexist with the original images.
- It processes DICOM files, enhances them, and sends the enhanced images to a designated destination.
Notable capabilities:
- SubtleHD (1.x) is an image processing software that uses a convolutional neural network-based filtering algorithm for image enhancement.
- It is part of Subtle Medical’s AI imaging portfolio, which aims to provide a vendor-neutral AI Imaging Hub for various modalities.
Reviewed by Pouyan Golshani, MD — Interventional Radiologist
Key Features
- AI-powered denoising and sharpening for ultra-clear MRI images
- Enables up to 80% faster MRI scan times
- Seamless integration with existing MRI scanners (vendor-neutral)
- Improves image quality beyond standard of care
- Applicable to all body regions
- Optimizes radiology workflows and increases patient throughput
- Extends the lifespan of existing MRI scanners
- Software as a Medical Device (SaMD)
- Operates on DICOM files
Use Cases
- Accelerating MRI exams to reduce patient wait times
- Improving diagnostic confidence with superior image quality
- Enhancing operational efficiency and increasing scanner utilization
- Reducing patient discomfort for claustrophobic patients or those with difficulty staying still
- Extending the utility and performance of older MRI equipment
- Supporting radiologists in delivering faster, more reliable results
What Physicians Need to Know
DICOM Support & Standards
SubtleHD operates on DICOM files, enhancing them and sending the processed images to desired destinations with an AE Title (e.g., PACS, MR device, workstation). Enhanced images coexist with the original images. Subtle Medical products implement the necessary DICOM services for anonymization, transfer, storage, processing, and return of DICOM images.
PACS Integration Method
SubtleHD seamlessly integrates with existing MRI scanners and current workflows. It can be configured to send enhanced images to PACS, an MR device, or other destinations that are associated with an IP and AE Title.
Reading Room Workflow Impact
SubtleHD is designed to increase efficiency, improve image quality, and optimize workflows without requiring additional hardware. It enables significantly faster MRI scan protocols, with some sequences achieving up to 80% time savings, which can reduce patient waiting times, improve patient comfort, and increase scanner throughput. The software provides clearer, sharper images, potentially boosting diagnostic confidence.
AI Model Architecture (deep learning approach)
SubtleHD utilizes a convolutional neural network (CNN) based filtering algorithm for image enhancement. It employs a single neural network trained for adaptive noise reduction and sharpness increase, complemented by additional nonlocal mean-based denoising and unsharp masking filters.
FDA Clearance Pathway (510k/De Novo)
SubtleHD (1.x) received 510(k) premarket notification clearance from the FDA. It is classified as a Class II medical device under regulation 21 CFR 892.2050 (Medical Image Management And Processing System).
Supported Modalities (CT/MRI/X-ray/US)
SubtleHD is specifically designed for MRI images and is applicable to all body regions.
Sensitivity & Specificity Data
SubtleHD produces 'ultra-clear images that often exceed standard-of-care quality' and has been 'clinically validated across major hospitals and imaging centers.' It does not introduce artifacts into MRI images. A study demonstrated that a 3D dementia classifier achieved superior robustness and accuracy when trained on SubtleHD-enhanced MR images.
RSNA/ACR Validation
Subtle Medical actively showcases its innovations at RSNA. SubtleHD has been clinically validated across major hospitals and imaging centers.
Physician Tip
SubtleHD can significantly enhance diagnostic confidence by providing clearer, sharper MRI images, even from accelerated scans. The ability to reduce scan times by up to 80% can greatly improve patient comfort, especially for claustrophobic or pediatric patients, and those with difficulty holding still. This also allows for increased patient throughput and optimized scanner utilization. Since enhanced images coexist with original images, radiologists maintain flexibility in their review process. Consider leveraging SubtleHD to expand MRI protocols and potentially extend the lifespan of existing MRI equipment.
SubtleHD is designed for seamless, vendor-neutral integration with existing MRI scanners and PACS. It operates by processing standard DICOM files and can send the enhanced DICOM images to any desired destination (PACS, MR device, workstation) using an AE Title, ensuring compatibility with current imaging infrastructure without the need for additional hardware upgrades.
Details
| Category | Radiology & Imaging AI |
| Pricing |
Contact for pricing
|
| Deployment | Software solution that integrates with existing MRI scanners; operates on DICOM files. |
| Compliance | |
| BAA Available | Unknown AI-estimated |
| HIPAA Compliant | Unknown AI-estimated |
| FDA Status |
1 AI-estimated SubtleHD received FDA 510(k) clearance (K243250) on February 12, 2025, as a Software as a Medical Device (SaMD) for image enhancement of all body parts MRI images, including noise reduction and increasing image sharpness. |
| Integrations | |
| EHR | Not specified |
| Specialties | Radiology |
What the Web Says
SubtleHD (1.x) is an AI-powered image enhancement software developed by Subtle Medical for MRI, PET, and CT scans. It aims to improve image quality by reducing noise and sharpening images, while also significantly accelerating scan times. The software has received FDA clearance and is designed to integrate seamlessly into existing workflows with various scanner brands.
Overall: PositiveStrengths
- Faster scan times (up to 80% for MRI, 75% for PET), leading to increased patient comfort and throughput.
- Enhanced image quality with AI-powered denoising and sharpening, providing clearer and more accurate results for diagnosis.
- Universal compatibility with existing MRI, PET, and CT scanners from major manufacturers (GE, Siemens, Hitachi, Philips).
- Seamless integration into current workflows without requiring hardware changes.
- Improved operational efficiency, allowing for more patients to be seen and reducing backlogs.
- Clinically validated and FDA-cleared across multiple modalities.
Limitations
- Specific cons or limitations of SubtleHD (1.x) were not readily available in the provided search results.
- No reviews from Reddit, G2, or Capterra specifically for SubtleHD (1.x) were found.
Based on reviews from: Subtle Medical Customer Testimonials, Rezolut Launches SubtleHD: More Comfortable MRI Scans, Sharper Results, Emerging Advances in PET Imaging Software: An Interview with Subtle Medical's Josh Gurewitz and Ajit Shankaranarayanan, PhD, MRI | SubtleHDu2122 | Artificial Intelligence | Book Your Scan Today | Los Angeles, CA, FDA Clearance Granted to Subtle Medical's SubtleHDu2122(PET) for Improved Imaging, Subtle Medical's SubtleHD(MR)u2122 Wins FDA Clearance, Setting a New Benchmark for MRI Image Quality and Speed, Subtle Medical Gets FDA Clearance for CT Image Enhancement Software, Discover Unmatched MRI Image Quality and Speed with the Grand Unveiling of Subtle-ELITE - YouTube, FDA OKs Subtle Medical's MRI Acceleration & Enhancement Software, AuntMinnie, accessdata.fda.gov, MedTech Innovator
Last updated: 2026-07-20
Ratings & Reviews
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Press & Coverage
FDA
SubtleHD (1.x) - 510(k) Premarket Notification
SubtleHD (1.x) is an FDA-cleared image processing software for MRI, designed to enhance images by reducing noise and increasing sharpness for all body parts. It operates as Software as a Medical Device (SaMD) without a user interface, integrating with existing PACS workstations.
2025-02
Innolitics
Command Line as a Medical Device (CLaMD)
This article discusses Command Line as a Medical Device (CLaMD) and references SubtleHD (1.x) as an example of a device without a user interface, where enhanced images are viewed on existing PACS workstations. It highlights how such AI engines are invisible to clinicians, maintaining an unchanged workflow.
2025-05
Innolitics
QIH u00b7 Automated Radiological Image Processing Software u2014 FDA Product Code
SubtleHD (1.x) is listed under the FDA product code QIH for Automated Radiological Image Processing Software, with a clearance date of February 12, 2025. This classification includes software implementing nonadaptive machine learning algorithms for image processing and analysis.
2025-02
Aidoc Marketplace
SubtleHD (1.x) | Subtle Medical, Inc. radiology AI profile
SubtleHD (1.x) is an FDA-cleared radiology AI solution specifically for MRI image enhancement. The profile provides details on its workflow and suitability for buyers in the medical imaging field.
unknown
Innolitics
List of FDA authorized devices with Predetermined Change Control Plans
SubtleHD (1.x) is included in a list of FDA-authorized devices with Predetermined Change Control Plans (PCCPs), with its 510(k) submission date on October 15, 2024, and clearance on February 12, 2025. PCCPs allow for planned device modifications to improve customer satisfaction and product generalizability.
2024-08
Macquarie University
The trust gap in generative medical imaging
This peer-reviewed article references SubtleHD (1.x) in its discussion on generative AI in medical imaging, citing its 510(k) substantial equivalence letter and summary from 2025. The article explores the challenges and safeguards needed for AI-generated content in clinical settings.
2026-04
FDA
K243250 - 510(k) Premarket Notification
This FDA 510(k) Premarket Notification details the clearance of SubtleHD (1.x) by Subtle Medical, Inc., for automated radiological image processing. The decision date for substantial equivalence was February 12, 2025.
2026-06
BEUDAMED
AiMIFY (1.x)
SubtleHD (1.x) is listed among other clearances by Subtle Medical, Inc., with its FDA clearance date noted as February 12, 2025. This indicates its status as a cleared medical device in the market.
2024-08
Videos
Product demos, reviews, and walkthroughs for SubtleHD (1.x).
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Frequently Asked Questions
SubtleHD (1.x) is a vendor-neutral AI-powered software solution that seamlessly integrates with existing MRI scanners from various manufacturers without requiring new hardware. It enhances image quality through advanced denoising and sharpening, enabling significantly faster scan protocolsu2014some up to 80%u2014which improves patient comfort, reduces wait times, and increases scanner throughput.
SubtleHD (1.x) has received FDA 510(k) clearance in the United States and CE Mark certification for commercial availability in Europe, demonstrating its compliance with key medical device regulations. While specific details on data privacy and security protocols are not extensively detailed in the provided snippets, Subtle Medical, as a healthcare technology company, would be expected to adhere to relevant data protection regulations like HIPAA and GDPR.
While SubtleHD (1.x) offers significant benefits in accelerating MRI scans and enhancing image quality, potential challenges could include the need for initial integration and training for staff, and ensuring consistent performance across all diverse clinical scenarios and patient populations. The technology is designed to improve image quality and speed, but its impact on specific rare pathologies or highly specialized sequences would need continuous evaluation.
Yes, other AI solutions exist in the market that aim to enhance medical imaging, and conventional MRI techniques can also be optimized, though often with trade-offs in scan time or image quality. Subtle Medical positions SubtleHD (1.x) as part of its Subtle-ELITEu2122 package, which combines multiple AI tools for comprehensive MRI workflow optimization, suggesting a differentiated approach compared to single-purpose solutions.
The provided information does not specify the exact pricing or licensing models for SubtleHD (1.x). However, it is presented as a cost-effective solution that extends the lifespan of existing MRI magnets and eliminates the need for costly OEM upgrades or new equipment purchases, implying a software-as-a-service or licensing model that aims to provide immediate return on investment by boosting revenue through increased patient slot times.
Subtle Medical emphasizes that its AI solutions, including SubtleHD (1.x), are supported by research and have been deployed in thousands of scanners worldwide, improving image quality and speed. The company highlights that SubtleHD produces ultra-clear images that often exceed standard-of-care quality, and its efficacy has been validated through FDA clearance and CE Mark certification.
SubtleHD (1.x) is designed to enhance diagnostic image quality through denoising and sharpening, which can lead to clearer results for more accurate interpretation and improved clinical confidence. By enabling faster scan times and optimizing workflows, it helps radiologists read faster, potentially reducing burnout and allowing for more efficient patient care with existing resources.
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| Last Verified: 2026-04-19 | First Added: 2026-04-19
Investors who backed SubtleHD (1.x)
Funded through the company that built this tool.
