How applied imaging technology is examined
RANZCR describes two Phase 1 written examinations, each one three-hour paper delivered on an online proctored platform. The Anatomy paper combines labelling, very short answer, multiple choice and short answer questions, weighted roughly brain 20%, head and neck 15%, spine 10%, thorax 15%, abdomen and pelvis 25% and limbs 15%. The Applied Imaging Technology paper has 9 constructed response questions and 60 MCQs on physics, technology, radiation protection and patient safety. Both must be passed to progress to Phase 2.
Core AIT topics
| Modality | Key concepts |
|---|---|
| X-ray | Tube design, kVp and mAs, attenuation, scatter, grids, detectors |
| CT | Helical acquisition, pitch, reconstruction kernels, CTDIvol, DLP, artefacts |
| MRI | T1 and T2 relaxation, TR and TE, k-space, sequences, artefacts, safety zones |
| Ultrasound | Frequency and resolution, Doppler, artefacts |
| Nuclear medicine | Radiopharmaceuticals, gamma camera, PET |
| Radiation protection | Justification, optimisation, dose limits, ALARA, pregnancy |
| Contrast | Iodinated and gadolinium reactions, renal risk, NSF |
Radiation dose and protection
- Effective dose (mSv) estimates stochastic risk across tissues.
- Occupational dose limits are set by ARPANSA codes based on ICRP recommendations.
- Reduce dose with time, distance and shielding, and by optimising protocols.
- Always check pregnancy status where relevant.
Worked questions
Worked question 1 · CT
Doubling the mAs in a CT scan with all else unchanged does what?
- A Doubles dose and lowers noise
- B Halves dose and raises noise
- C Has no effect on patient dose
- D Raises kVp
- E Reduces spatial resolution markedly
Show the reasoning
Answer A. Dose is proportional to mAs. Image noise is inversely proportional to the square root of mAs, so doubling mAs reduces noise by about 30%.
Worked question 2 · MRI
On a T1-weighted image, which tissue is usually bright?
- A Fat
- B Cerebrospinal fluid
- C Cortical bone
- D Air
- E Oedema
Show the reasoning
Answer A. Fat has a short T1 and appears bright on T1-weighted images. CSF and oedema are dark on T1 and bright on T2.
A 4-week revision block
| Week | Focus |
|---|---|
| 1 | X-ray and CT physics |
| 2 | MRI physics and safety |
| 3 | Ultrasound and nuclear medicine |
| 4 | Radiation protection, contrast and timed papers |
Pair reading with daily timed questions and image review on teaching files, and log every missed structure or sign.
Common traps
- Memorising formulas without units.
- Confusing CTDIvol and DLP.
- Neglecting MRI safety.
- Not practising the exam calculator.
Free sample applied imaging technology questions
Questions from our Radiology Phase 1 bank. Choose your answer, then open the explanation.
Most of the energy of electrons hitting an X-ray target becomes:
- ABremsstrahlung X-rays only
- BUltrasound waves in the tube
- CCharacteristic X-rays from K-shell
- DVisible light from the anode
- EHeat
Show answer and explanation
Answer E. About 99% of electron energy becomes heat; under 1% becomes X-rays (mostly bremsstrahlung). This is why anode cooling and rotation matter.
Learning point: X-ray tube: about 99% heat.
The three principles of radiation protection are:
- AContrast, resolution, noise
- BJustification, optimisation, dose limits
- CkVp, mAs, distance
- DSpeed, accuracy, reporting and audit of practice
- ETime, shielding, cost
Show answer and explanation
Answer B. ICRP and ARPANSA: justification, optimisation (ALARA), and dose limitation (for staff and public, not patients).
Learning point: Radiation protection: justify, optimise, limit.
Higher transducer frequency gives:
- ADeeper penetration with better axial detail
- BBetter resolution, less penetration
- CMore attenuation in air only
- DLower resolution
- ENo change
Show answer and explanation
Answer B. Higher frequencies improve axial resolution but attenuate more, so are used for superficial structures.
Learning point: High frequency: resolution up, penetration down.
Practise more applied imaging technology questions free
Every applied imaging technology subtopic in our bank
The bank holds 50 applied imaging technology questions across 50 subtopics. You can filter by any of them, build a custom block and track your accuracy subtopic by subtopic.
- Acoustic enhancement1
- ALARA1
- Aliasing1
- Anti-scatter grid1
- Chemical shift1
- Compton scatter1
- Contrast nephropathy1
- Contrast reaction1
- CT artefacts1
- CT number1
- CT pitch1
- CT window1
- CTDI1
- Deterministic effects1
- Digital detectors1
- Doppler angle1
- Dose units1
- DWI1
- Effective dose1
- FDG uptake1
- Fluoroscopy dose1
- Focal spot1
- Gadolinium1
- Half-life1
- Image matrix1
- Inverse square law1
- Iterative reconstruction1
- kVp effect1
- Lead apron1
- Mammography target1
- mAs1
- MRI field1
- MRI safety zones1
- Nuclear medicine1
- Occupational dose limit1
- PET1
- Photoelectric effect1
- Pregnancy and radiation1
- Radiation risk communication1
- SAR1
- Signal-to-noise1
- Spatial resolution1
- STIR1
- Susceptibility1
- T1 weighting1
- TR and TE1
- Ultrasound frequency1
- Ultrasound safety1
- Ultrasound speed1
- X-ray production1
Common questions
What does the AIT exam include?
RANZCR lists 9 constructed response questions and 60 MCQs in one three-hour paper.
Is a calculator used?
RANZCR advises reviewing the exam calculator before the AIT exam.
Which standards cover radiation protection in Australia?
ARPANSA codes and guides.
How many applied imaging technology questions are in the Radiology Phase 1 bank?
There are 50 applied imaging technology questions across 50 subtopics, and the bank grows as new questions pass review.
Can I practise only applied imaging technology questions?
Yes. Filter by area or by any subtopic to build a custom block, in tutor mode with explanations after each question or in timed mode.
How are applied imaging technology questions explained?
Every question explains why the answer is right and why each other option is wrong, with a learning point and the Australian source behind it.
How much of the Radiology Phase 1 mock is applied imaging technology?
About 50 questions in each 100-question mock come from applied imaging technology, following our mock blueprint.
Which sources is this applied imaging technology page based on?
It summarises current Australian guidance, including RANZCR Clinical Radiology Phase 1 examinations; ARPANSA radiation protection; Radiopaedia. Guidelines change, so always check the latest edition.
When was this applied imaging technology guide last updated?
It was last reviewed on 9 November 2026. We update topic pages when the exam or Australian guidance changes.
How do I unlock all Radiology Phase 1 questions?
Choose a Radiology Phase 1 plan: 3 or 6 months of access, from A$569.99, one payment with no auto-renew. It opens every area, not just applied imaging technology.
Sources
Clinical content is summarised from current Australian guidance at the date above. Guidelines change, so always check the latest edition.