More study resources

About this exam

The Diagnostic Radiographer credential is the entry-to-practice qualification for technologists who produce medical images using X-rays and who are responsible for the radiation safety of patients and staff during those examinations. Candidates typically hold a recognised diploma or degree in diagnostic radiography or medical imaging and complete supervised clinical hours before sitting the examination. The exam is delivered in a multiple-choice format and samples across the whole role rather than one specialty: radiation protection and radiobiology, equipment operation and quality control, image production and evaluation, radiographic procedures and positioning, patient care and management, anatomy including cross-sectional anatomy, radiologic physics, and professionalism, ethics and regulatory compliance. Positioning and image evaluation carry the most weight, but the domains are interlinked - a positioning error is also an image-quality question, and a shielding decision is also a physics question. Preparation should combine structured content review with deliberate practice on image critique and calculation questions (exposure factors, dose, grid and magnification relationships). Working through unfamiliar positioning scenarios and explaining your reasoning aloud is more effective than rereading notes. The official body publishes current details on format, scheduling, fees, passing standards and retake rules; confirm those on its website before you book.

What you'll study

Common questions

About Diagnostic Radiographer preparation

What format is the exam?

It is a multiple-choice examination delivered on computer. Expect standalone items and some image-based or scenario items requiring you to identify anatomy, judge image quality or select a positioning adjustment. The official body publishes the current item count, timing and any sectional structure, so check its site rather than relying on secondhand accounts.

How difficult is it in practice?

Most candidates find the content familiar but the pacing demanding. Recall questions are quick; the difficulty comes from applied items that combine positioning, exposure factors and radiation protection in one scenario. Practising under timed conditions and reviewing why each distractor is wrong builds the judgement the exam rewards.

Can I retake it if I fail, and how soon?

Retake eligibility, waiting periods and any limit on attempts are set by the certifying body and can change. Some jurisdictions also require remediation or additional clinical hours before a second attempt. Confirm the current retake policy, associated fees and deadlines directly with the official body before you plan a repeat sitting.

How much time should I allow for preparation?

A common approach is eight to twelve weeks of steady study alongside clinical work, weighted toward your weakest domains. Begin with a diagnostic practice test to identify gaps, then alternate content review with applied question sets. Candidates returning after a long break usually need longer for physics and exposure calculations.

In what order should I study the domains?

Build foundations first: radiologic physics, then equipment and image production, because positioning and protection questions assume that knowledge. Add anatomy alongside procedures so you learn structures in the positions you will image. Patient care, ethics and regulatory content is efficient to revise late, once the technical material is secure.

What are the most common failure modes?

Three recur often: memorising positions without understanding why a projection is chosen, weak arithmetic on exposure and dose calculations, and misreading stems that ask for the least appropriate option. Poor time management also hurts - candidates linger on image-critique items and then rush the straightforward recall questions at the end.

Do I need to memorise exposure factor charts?

You need the underlying relationships rather than fixed charts: how milliampere-seconds, kilovoltage, distance and receptor sensitivity interact, and how grids and collimation change dose and contrast. Expect items that ask you to predict the effect of a change or correct an underexposed image, not to recall a table from a specific department.

How is radiation protection tested?

Usually through applied scenarios rather than definitions: choosing shielding, applying inverse square and dose-reduction principles, distinguishing deterministic from stochastic effects, and recognising occupational and public dose limits. Be comfortable with the ALARA principle and with justifying a technique change in terms of patient benefit versus risk.

Where do I confirm dates, fees and passing scores?

Only the official certifying or licensing body for your jurisdiction can confirm these. Its website publishes the current application windows, fees, passing standard, identification requirements and test centre or remote-proctoring arrangements. Treat forum posts and older study guides as unreliable for any number that affects your booking.