- What the CRES Credential Actually Is (and Isn't)
- The Three Eligibility Pathways
- The Specialty Work-Experience Rule
- Candidate Status: Testing Before You Are Fully Certified
- Documentation You Need to Have Ready
- Registration, Fees and Testing Windows
- What You Qualify to Sit: Exam Format and Content
- Matching Your Background to the Blueprint
- Keeping the Credential After You Earn It
- Frequently Asked Questions
- Full CRES eligibility has three routes: degree plus two years BMET experience, military program plus two years, or four years of BMET experience alone.
- A bachelor's degree does not replace the work-experience requirement; it only counts toward the degree pathway.
- Candidate status lets you test before full certification, then you have five years to complete the experience requirement.
- Specialty experience must be at least 40% of the last two years or 25% of the last five years.
What the CRES Credential Actually Is (and Isn't)
The Certified Radiology Equipment Specialist credential is issued by the Association for the Advancement of Medical Instrumentation (AAMI) through its ACI certification program. AAMI describes the program as the AAMI Certification Institute on its certification overview and as the AAMI Credentials Institute on its FAQ page. Those are the same program, so do not be thrown if you see both names while researching.
This is a credential for biomedical equipment professionals who service, maintain and troubleshoot radiology equipment. It is not a radiologic technologist credential, which certifies people who perform imaging procedures on patients. It also has nothing to do with unrelated certifications that happen to share a similar acronym. If you are still orienting yourself, our explainers on what CRES certification is and what CRES stands for cover the basics before you dig into eligibility.
Eligibility matters more for this credential than for many entry-level certifications, because the requirements are built around hands-on biomedical equipment technician (BMET) work. You cannot simply study your way into full certification; you need documented field time.
The Three Eligibility Pathways
To be fully certified, you must satisfy one of three pathways. Each one ends in the same place: verified full-time BMET experience. What changes is how many years you need, based on your educational or military background.
| Pathway | Education / Training Component | Work Experience Required |
|---|---|---|
| Degree pathway | Associate degree or higher in electronics, technology or science | Two years full-time BMET experience |
| Military pathway | Completion of a U.S. military biomedical equipment technology program | Two years full-time BMET experience |
| Experience-only pathway | No degree or military program required | Four years full-time BMET experience |
Choosing the pathway that fits you
If you hold a two-year or four-year degree in a relevant field, the degree pathway cuts your required experience in half. The key phrase is "electronics, technology or science." A degree in an unrelated field does not qualify you for the shortened route, so check your transcript against that wording rather than assuming any degree will do.
If you trained in a U.S. military biomedical equipment technology program, the military pathway gives you the same two-year experience requirement. Many BMETs enter the civilian field this way, and the credential is a natural way to translate military training into something hiring managers recognize.
If you came up through on-the-job training with no formal degree, the four-year experience-only pathway is your route. It is longer, but it is fully legitimate, and it rewards the technicians who learned the trade in hospitals and imaging departments.
The Specialty Work-Experience Rule
This is the requirement that surprises the most applicants. Having BMET experience in general is not enough. A meaningful share of your recent work must be in the designated specialty, which for this credential means radiology equipment. The rule offers two ways to meet it:
- At least 40% of your work experience during the preceding two years must be in the specialty, or
- At least 25% of your work experience during the preceding five years must be in the specialty.
You only need to satisfy one of these two tests. The two-year test suits technicians who currently spend a large portion of their week on imaging systems. The five-year test is more forgiving for someone who has rotated through several equipment categories but has still accumulated meaningful radiology exposure over a longer span.
What counts as radiology specialty work
Think about the equipment families the exam itself covers: diagnostic X-ray systems, CT, MRI, ultrasound, nuclear medicine, and the networked systems that connect them, such as PACS and modality workflow. Preventive maintenance, calibration, corrective repair, acceptance testing and safety checks on those systems all reflect the kind of work the credential is built around. If your daily work is mostly infusion pumps, patient monitors and general clinical engineering, you may need to shift your assignments toward imaging before you apply.
Candidate Status: Testing Before You Are Fully Certified
One of the most useful features of this program is candidate status. You may qualify as a candidate if you hold the qualifying degree, have completed the qualifying military program, or have two years of full-time BMET experience. As a candidate, you can take the exam before you have accumulated everything required for full certification.
Successful candidates then have five years to meet the full-certification requirements. In practice, this means a technician with an associate degree and only a year of experience can study while the material is fresh from school, pass the exam, and complete the remaining experience over time. It is a smart sequencing option for newer technicians who do not want to wait years before demonstrating their knowledge.
Who benefits most from candidate status
- Recent graduates of electronics or biomedical technology programs who are still building field hours
- Veterans transitioning out of military biomedical programs into civilian departments
- Technicians with two years of general BMET experience who are working toward a heavier imaging assignment
Keep in mind that candidate status is not the same as holding the credential. It is a stepping stone, and the five-year window is the deadline for completing the rest. If you are weighing whether to pursue this early, our analysis on whether the CRES certification is worth it can help you think through the timing.
Documentation You Need to Have Ready
Your application is only as strong as the paperwork behind it. Plan to gather the following before you apply:
- Degree documentation if you are claiming the degree pathway, such as a transcript or diploma showing a degree in electronics, technology or science
- Military program documentation if you are claiming the military pathway, confirming completion of a U.S. military biomedical equipment technology program
- Employment verification of full-time BMET experience, ideally from supervisors who can confirm dates and duties
- Evidence of specialty work demonstrating the radiology share of your recent experience
Degree or military-program documentation is required when you claim that pathway. If you are going the experience-only route, your employment history carries the entire application, so it deserves extra care.
If your records are scattered across multiple employers, start collecting contact information and confirmation letters early. Verification delays are one of the easiest ways to miss a registration deadline.
Registration, Fees and Testing Windows
Once you know your pathway, the logistics come down to money and calendar dates.
Exam fees
| Fee Type | Member | Nonmember |
|---|---|---|
| Examination | $410 | $460 |
| Retake | $355 | $405 |
AAMI members pay less, so if you are planning to apply, compare the cost of membership against the savings. For the full picture including renewal charges, see our CRES certification cost breakdown.
Testing windows and deadlines
The exam is offered in two regular windows each year: May 1-15 and November 1-15. For the November 1-15, 2026 window, the application deadline is October 16, and late registration closes October 23 with a $50 late fee. Our guide to CRES exam dates and scheduling walks through how to plan around these windows.
Because there are only two windows per year, missing a deadline can cost you roughly six months. Treat the application deadline as your real due date, not the testing window itself.
How the exam is delivered
The exam is computer-based and delivered at approved Kryterion testing centers, scheduled through Webassessor. You will sit for it in person at a testing center rather than from home, so build in time for travel and choose a center well ahead of your window.
Key Takeaway
Work backward from the application deadline. Confirm your pathway, gather degree or military documentation, line up employment verification, and submit well before the late-registration cutoff so you never pay the $50 late fee unnecessarily.
What You Qualify to Sit: Exam Format and Content
Meeting eligibility gets you through the door, but it helps to know what waits on the other side. The exam contains 165 multiple-choice questions with a three-hour time limit. It is closed-book, though a simple calculator is permitted. Passing is determined by a criterion-referenced standard set through the modified Angoff method rather than a fixed percentage, so there is no single magic number to chase. For more on how scoring works, read our piece on the CRES passing score.
The six content areas
AAMI labels every percentage approximate. The current live objectives list the six areas as follows:
Domain 1: Anatomy & Physiology (approx. 7%)
The smallest area, but it underpins how imaging equipment interacts with the patient.
- Body systems relevant to imaging and diagnostic equipment
- Understanding what clinicians are trying to visualize
Domain 2: Fundamentals of Electricity and Electronics (approx. 10%)
The circuit and component knowledge every imaging technician relies on.
- Core electrical principles and measurement
- Electronic components and basic circuit behavior
Domain 3: Healthcare Information Technology (approx. 25%)
One of three co-largest areas, reflecting how networked radiology equipment has become.
- Networking concepts as they apply to imaging systems
- Connectivity between modalities and clinical information systems
Domain 4: Healthcare Technology and Function (approx. 25%)
How the equipment works and what each system is designed to do.
- Operating principles of major imaging modalities
- Maintenance, calibration and performance verification
Domain 5: Healthcare Technology Problem Solving (approx. 25%)
Diagnosing faults and restoring equipment to safe, working order.
- Systematic troubleshooting approaches
- Interpreting symptoms, error behavior and test results
Domain 6: Public (employee, patient, visitor) Safety in the Healthcare Facility (approx. 8%)
Safety obligations that surround imaging environments.
- Hazards affecting staff, patients and visitors
- Safe work practices around radiology equipment
Notice that Domains 3, 4 and 5 together make up roughly 75% of the exam. For a detailed walkthrough of each, see our complete guide to the six CRES content areas.
Matching Your Background to the Blueprint
Your eligibility pathway often hints at where your knowledge gaps are likely to be. Here is a practical way to use that, and it is the one place we will touch on study planning in this article.
- Degree-pathway candidates tend to be comfortable with electronics and theory (Domain 2) but may have thinner hands-on troubleshooting exposure (Domain 5). Schedule extra time for real-world fault diagnosis scenarios.
- Military-pathway candidates often have strong equipment-function and problem-solving habits (Domains 4 and 5) but may need more work on civilian healthcare IT and networking (Domain 3).
- Experience-only candidates usually excel at practical repair but may need to revisit anatomy, electronics fundamentals and formal terminology (Domains 1 and 2).
Because healthcare IT carries about a quarter of the exam, nearly everyone benefits from dedicating a full block of preparation to it early rather than saving it for last. Our CRES study guide lays out a full plan, and the difficulty guide explains which areas candidates tend to find toughest. When you are ready to test your recall, try the practice questions on the main CRES practice test site.
Keeping the Credential After You Earn It
Eligibility does not end when you pass. Maintaining the credential requires at least 30 ACI CEUs in a three-year reporting cycle, including at least 15 in Category IV: Professional Development. You report them through My Active CEU Journal and pay a renewal fee of $100 for members or $150 for nonmembers. The current FAQ requires the CEUs to be earned by December 31 of the recertification year.
If you are weighing the long-term career value of staying certified, our CRES salary guide and overview of CRES jobs show where the credential tends to matter to employers.
Frequently Asked Questions
No. The experience-only pathway requires four years of full-time BMET experience with no degree. A degree in electronics, technology or science, or a U.S. military biomedical equipment technology program, shortens the required experience to two years.
Yes, through candidate status. You qualify if you have the qualifying degree, the military program or two years of full-time BMET experience. Successful candidates then have five years to meet the full-certification requirements.
At least 40% of your work experience during the preceding two years, or at least 25% during the preceding five years, must be in the designated specialty. You only need to meet one of those two tests.
No. A bachelor's degree does not replace the work-experience requirement. It qualifies you for the two-year degree pathway if the field is electronics, technology or science, but documented full-time BMET experience is still required.
For the November 1-15, 2026 testing window, the application deadline is October 16, and late registration closes October 23 with a $50 late fee. The other regular window is May 1-15. See the full CRES requirements overview and our exam dates guide for planning details.