Subul Data Annotation

Subul Data Annotation

Subul Data Annotation

Clinically Reviewed Training Data for More Reliable Medical AI

Dedicated, full-time medical annotation teams—not shared freelancer pools—supported by clinical specialists in oncology, cardiology, surgery and colonoscopy.
Includes a free 4–6 hour trial annotation batch after the call.
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Trusted by AI teams building the next generation of diagnostic and clinical tools.

Medical AI Needs More Than Generic Annotation

Where Generic Annotation Falls Short

Clinical Context Built Into the Workflow

Medical Expertise Built Into the Annotation Workflow

A clear human-in-the-loop process connects clinical guidance, dedicated annotation and traceable quality review.

Clinical Protocol & Guidance

Modality, labeling rules, edge cases and acceptance criteria are defined around your clinical use case.

Dedicated Medical Annotation

A full-time medical annotation team completes the work using the agreed protocol—not a rotating freelance pool.

Specialist QA & Traceability

Outputs are reviewed against the protocol, with each delivered batch linked to clear annotation and review records.

Clinical areas supported

Oncology

Cardiology

Surgery

Colonoscopy

Medical Annotation Proven in Practice

A published medical imaging project combining dedicated annotation, surgeon oversight and multi-level quality control.
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SURGICAL ROBOTICS

Polygon Annotation for Surgical Tool Recognition

Blood, tissue and partial occlusion made surgical tool boundaries difficult to define, while access to surgeon oversight was costly and difficult to scale.

Subul assembled 10 medical image annotators supervised by 5 surgeons, using polygon annotation and multi-level quality control to label 2,365 medical images.

The project reported 99% accuracy in surgical tool recognition.

Medical Images
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Medical Annotators
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Supervising Surgeons
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Reported Accuracy
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A WORKFLOW BUILT FOR MEDICAL AI

From Raw Medical Data to Model-Ready Ground Truth

A dedicated team manages annotation, quality review and delivery against your guidelines—ensuring consistent, reliable data at every stage.

Define the Requirements

We align on the modality, annotation guidelines, edge cases and acceptance criteria.

Run a Trial Batch

Start with a free 4–6 hour trial batch to validate the workflow and expected quality.

Annotate & Review

Dedicated annotators complete the work, with clinical specialists supporting quality review.

Deliver & Improve

Receive structured, model-ready outputs and refine the next batches through continuous feedback.

WHY SUBUL

Quality Is Built Into Every Annotation

Medical AI requires more than correctly placed labels. Subul combines dedicated annotation teams, clinical input and structured quality checks to maintain consistency from the first trial batch through scaled delivery.

Dedicated Teams

Full-time annotators—not shared freelancer pools.

Quality Review

Structured checks keep every batch consistent.

Clinical Support

Medical specialists guide complex cases.

Ready to Scale

Trained teams grow with your data needs.

FREQUENTLY ASKED QUESTIONS

Questions Before You Get Started?

Everything you need to know about starting a medical data annotation project with Subul.

What types of medical data do you annotate?

We support medical imaging and video projects across oncology, cardiology, surgery and colonoscopy.

How does the free trial work?

After the discovery call, we complete a free 4–6 hour trial batch so you can evaluate our quality and workflow.

Who performs the annotation?

Dedicated, full-time annotators work on your project, with clinical specialists supporting complex cases.

Can you follow our annotation guidelines?

Yes. We align with your labels, edge cases and acceptance criteria before full production begins.

How do you maintain quality at scale?

Structured reviews and continuous feedback help keep every batch consistent as volumes grow.

How do you handle sensitive medical data?

Data-access and handling requirements are agreed before the project begins. De-identified or synthetic data can also be used for trial batches.
READY TO GET STARTED?

Let’s Build the Ground Truth Your Medical AI Needs

Tell us about your data, annotation guidelines and quality requirements. We’ll recommend the right workflow and prepare a free 4–6 hour trial batch after the call.

Clinically reviewed medical training data, delivered by dedicated annotation teams.

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