Limited Permit X-Ray Technician vs Radiologic Technologist

The short answer

A limited X-ray tech (a limited permit X-ray technician in California, an LXMO in Oregon or Maryland, a BXMO in Florida, an LMRT in Texas) holds a state license to X-ray specific body areas, usually after a short course and the ARRT Limited Scope exam. A registered radiologic technologist, R.T.(R)(ARRT), completes a full radiography program, holds at least an associate degree, passes the ARRT Radiography exam and can image the whole body, including fluoroscopy and surgical and mobile work.

Side by side

Training and education

Limited training is set state by state, and it ranges a long way. Florida asks BXMO candidates for a review of the ARRT limited scope content (such as Radiography Essentials for Limited Practice) rather than a formal program. Mississippi's LXMO permit needs 12 hours of Board-approved education. At the other end, Maryland lists 115 didactic hours and 480 clinical hours, Colorado 80 hours didactic plus 480 clinical and 84 documented exams, and Massachusetts will require JRCERT-accredited programs from September 1, 2027.

The R.T.(R) route is longer and the same everywhere. ARRT's primary pathway requires an associate degree or higher from an institution accredited by an agency ARRT recognizes, plus an ARRT-approved educational program in radiography, where your program director confirms your didactic and clinical competency. You have three years after finishing the program to establish eligibility.

The exams

The ARRT Limited Scope exam has a 100-question core and 20- to 25-question procedure modules, and you take only the modules on your license. Your state sets the pass mark, between 65% and 75% where it's published. ARRT notes the limited exam isn't associated with ARRT certification or registration: it qualifies you for your state's license, not for the letters R.T. The ARRT Radiography exam covers the whole discipline and leads to ARRT certification and registration.

Scope of practice

This is where the difference shows up at work. A limited tech images only the categories on their license: a chest-and-extremities limited tech can't take a lumbar spine film, even if the clinic has the equipment. Several states narrow it further. Maine and Massachusetts cap limited licenses at two body areas, and Wyoming at three; Arizona's CPTR covers chest and extremities only. Limited licenses generally exclude fluoroscopy, contrast studies, CT and mammography. An R.T.(R) can do all general radiography and, with further credentials, move into CT, MRI, mammography and other modalities.

A day on the job

In a typical urgent care or clinic, a limited tech checks the order, confirms the patient's identity and pregnancy status, shields where appropriate, positions for the views requested, sets technique, takes the exposures and checks each image for positioning, collimation and exposure before the patient leaves. Many limited techs are cross-trained medical assistants, so X-ray is one part of a mixed day that may include vitals, rooming patients and clinic paperwork.

An R.T.(R) in a hospital does the same core tasks across every body part, plus portable exams on the floors and in the ICU, fluoroscopy with a radiologist, and C-arm work in surgery. That wider scope comes with more responsibility for radiation safety in the room, and it's why the R.T.(R) exam and program cover so much more than the limited scope core.

Moving from limited to R.T.(R)

There's no shortcut from a limited license to registration: ARRT's primary pathway still requires an ARRT-approved radiography program and an associate degree or higher, and limited experience doesn't replace either. What it does give you is a head start. You already know radiation protection, exposure factors and the positioning for your modules, and you've worked with real patients. Programs set their own admission rules, so ask the programs near you whether your experience or prerequisites count toward admission.

Which one is right for you?

• Choose limited if you want to add X-ray to a medical assistant role, work in urgent care or a specialty office, or start earning sooner. Check that your state actually has a limited license first: several, including New York, Connecticut and Hawaii, don't.
• Choose R.T.(R) if you want hospital work, fluoroscopy and surgery, more advanced modalities or a credential that travels across states.
• Do both, in order. Plenty of techs start limited, then enter a radiography program. Your limited knowledge of positioning, radiation safety and image production is a real head start.

Studying for the limited exam? Start with your state's requirements and what's on the ARRT Limited Scope exam. Already in a radiography program? Our sister site Rad Registry Prep covers the full ARRT Radiography exam, and the same login works on both.