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Massive U.S. mammography registry aims to sharpen breast cancer detection

NCT ID NCT01900821

Knowledge-focused Sponsor: American College of Radiology Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study is a large national registry that collects mammography data from radiology practices across the U.S. to help them compare their performance with national and regional benchmarks. It includes up to 8 million participants and provides feedback on key measures like cancer detection and recall rates. The goal is to improve the quality and accuracy of breast cancer screening, not to test a new treatment or drug.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this registry could help improve breast cancer detection rates and reduce unnecessary recalls across the U.S.
What could go wrong
This is an observational registry, not a treatment trial. It collects existing data and does not test a new intervention, so direct patient benefits are indirect and long-term.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 8,000,000 people

The number the study aims to enrol. It can still change while the study runs.

Start date

Jul 2009

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Women (primarily, but not exclusively), having mammograms at facilities participating in the registry

Ages

2 to 99 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * All Exclusion Criteria: * None

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Conditions

The condition(s) this trial relates to.

disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Breast cancer screening and diagnosis

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • ACR

    RECRUITING

    Reston, Virginia, 20190, United States

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