What is ACR Login?
As part of the ACR’s ongoing commitment to enhancing our systems and protecting NRDR participant data, the National Radiology Data Registry (NRDR) instituted a single sign-on (SSO) technology on December 1, 2020.
The login upgrade, called ACR Login, employs SSO to enable users to enter their login credentials one time on a single page to access all their ACR Login applications.
Certain ACR Login applications, such as NRDR, now employ Multifactor Authentication (MFA). MFA requires users to enter an additional piece of information when logging in for enhanced data security, making it harder for user accounts to become compromised.
ACR Login Set up and NRDR Profile Activation
You will receive an email from nrdr@acr.org (Subject line: ACR National Radiology Data Registry - User Invitation) inviting you to set up your ACR Login account, activate your NRDR user account and user profile -- or do both. 
Select a link below to follow the instructions depending upon whether:
You are new to NRDR and have neither an ACR Login Account nor a prior NRDR User Profile
You have been assigned a new User Profile and have an ACR Login Account
You had an NRDR account prior to Dec. 2020 and have not set up ACR Login
New NRDR Participant
1. Set up your ACR Login Account
Go to https://sso.acr.org and click the Sign-up link
Complete the Create Account information and click the Register button.
Look for a verification notice that an email sent to your account was successfully set up.
2. Activate Your ACR Account
Check your email inbox for an email from no-reply@sso.acr.org
Click the one-time use Activate Account button that will direct you to enroll in an MFA option
You have 30 days upon receipt of the Account Activation email to activate your account.
3. Enroll in Multifactor Authentication (MFA)
Upon activating your ACR Login Account, you are prompted to enroll in the Okta multifactor authentication (MFA).
Note: See the Knowledge Base article: MFA Enrollment Instructions page for MFA options.
4. Sign in to your ACR Login account and verify MFA
Go to https://sso.acr.org
Enter your ACR Login email address, click the “Remember me” box, and then click the “Next” button.
You will be prompted to verify your credentials with MFA
Be sure to check the box "Do not challenge me on this device for the next 30 days.” If this box is not checked, you will receive an MFA prompt every time you log in to NRDR.
5. Log in to the NRDR Portal
Return to your User Invitation email from nrdr@acr.org (Subject line: ACR National Radiology Data Registry - User Invitation)
The following steps are required to link your NRDR account and profile to your ACR Login.
Click the link in the email: Secure activation link to be directed to the NRDR User Account and User Profile Activation page.
Click the “Complete Activation” button to be directed to the ACR Login page
Sign in to your ACR Login account to automatically be redirected to NRDR dashboard
6. View Your Dashboard
Upon successful activation, you will view your NRDR dashboard. Going forward, you can:
Log in to your NRDR dashboard with your ACR Account at https://nrdr.acr.org/.
Log in via the ACR Login dashboard at https://sso.acr.org.
NRDR Participants with an ACR Login Account and a New NRDR User Profile
You will receive an email from nrdr@acr.org (Subject line: ACR National Radiology Data Registry - User Invitation) to activate your new User Profile following the steps below.
1. Log in to the NRDR Portal with Your New Profile
Click the link in the email: Secure activation link to access the NRDR User Account and User Profile Activation page to be directed to the NRDR User Account and User Profile Activation page.
Click the Complete Activation button to be directed to the ACR Login page
Sign in to your ACR Login account to automatically be redirected to NRDR dashboard
2. View Your Dashboard
Upon successful activation, you will view your NRDR dashboard which includes access to information for your new User Profile. Going forward, you can
Log in to your NRDR dashboard with your ACR Account at https://nrdr.acr.org/.
Log in via the ACR Login dashboard at https://sso.acr.org.
Participants with a Prior NRDR Account
If you were an NRDR participant prior to December 2020, you will need to place a ticket to the NRDR help desk to have an ACR Login activation email resent.
1. Activate your ACR Login
Please be aware that the link in the Activate your ACR Login button is for one-time use.
The ACR Login password must include:
At least 10 characters AND one or more:
Lowercase letters
Uppercase letters
Numbers
Upon creating your password, click the Create My Account button to access the ACR Login dashboard at: https://sso.acr.org.
See the screenshot of this page below that shows the ACR applications currently using ACR Login.
2. Enroll in Multifactor Authentication (MFA)
The first time NRDR participants access the NRDR portal using their new ACR Login account, they are prompted to enroll in the Okta multifactor authentication (MFA).
Note: See the Knowledge Base article: MFA Enrollment Instructions page for MFA options.
3. Log in to the NRDR Portal
With ACR Login, participants have two ways to access the NRDR portal and their other ACR applications:
Launch the application from the ACR Login dashboard (see screenshot below).
Log in to https://sso.acr.org with your ACR Login
Click the NRDR icon
Go to the NRDR portal home page at https://nrdr.acr.org
Click the login button to access a page to enter your ACR Login credentials
Successfully entering credentials will take participants to an active session in the NRDR portal