10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The RRA exam has 280 questions and runs 6 hours.
These 10 free RRA questions are organized by exam domain, so you can see how each part of the Registered Radiologist Assistant blueprint is tested. Reveal the answer and explanation under each question.
During a biopsy, a 78-year-old who received fentanyl and midazolam becomes difficult to arouse. Breathing is shallow at 4/min, end-tidal CO₂ has risen from 38 to 62 mmHg, and SpO₂ remains 98% on nasal oxygen. The procedure is stopped and help is coming. Airway repositioning and stimulation do not restore adequate breathing. Which intervention cannot wait?
Correct answer: A - Provide assisted ventilation with a bag-mask device and supplemental oxygen.
A woman with expressive aphasia is scheduled for an elective biopsy. Using writing and a communication board, she explains the biopsy's purpose, describes its major risks, compares it with observation, and consistently communicates her choice. Her daughter offers to sign because her mother cannot speak fluently. How should the consent process proceed?
Correct answer: A - Obtain the patient's informed decision using the communication aids.
Before a routine CT with intravenous iodinated contrast, a patient taking metformin has a stable eGFR of 48 mL/min/1.73 m² and no acute kidney injury. The department follows ACR recommendations for metformin management. What instruction is appropriate solely because of this contrast exposure?
Correct answer: D - Continue metformin; no interruption is required solely for this intravenous contrast exposure.
For a child's voiding cystourethrogram, the selected pulse rate is already the lowest that adequately depicts urethral motion. The image receptor is positioned well above the child, leaving a large air gap, and automatic exposure-rate control is active. Which change improves radiation protection while preserving the required temporal resolution?
Correct answer: B - Lower the receptor toward the child while preserving the source-to-skin distance.
In a patient with no prior esophageal intervention, fluoroscopy shows markedly impaired distal peristalsis, a patulous gastroesophageal junction, and free reflux without a fixed stenosis. Which diagnosis best explains the sphincter behavior?
Correct answer: C - Systemic sclerosis.
Paired samples obtained at thoracentesis show pleural-fluid protein 2.4 g/dL and serum protein 6.0 g/dL. Pleural-fluid LDH is 210 U/L, serum LDH is 400 U/L, and the laboratory's upper limit of normal for serum LDH is 240 U/L. Applying Light's criteria, which interpretation is correct?
Correct answer: A - Exudate: pleural LDH exceeds two-thirds of the laboratory's serum LDH upper limit.
A patient with recurrent calcium-containing renal stones has subperiosteal bone resorption. Laboratory results are calcium 12.1 mg/dL (reference 8.5-10.5), albumin 4.0 g/dL (3.5-5.0), intact parathyroid hormone 132 pg/mL (15-65), and creatinine 0.8 mg/dL (0.6-1.3). Which mechanism best connects the biochemical and skeletal findings?
Correct answer: D - Primary parathyroid overactivity despite an elevated serum calcium concentration.
A patient reports right calf pain with walking that resolves with rest. Resting systolic pressures are 120 mmHg in the right brachial artery, 140 mmHg in the left brachial artery, 98 mmHg in the right dorsalis pedis artery, and 112 mmHg in the right posterior tibial artery. What right-leg ankle-brachial index and classification should be recorded?
Correct answer: D - 0.80; abnormal.
Videofluoroscopy in a patient with a previous stroke shows no airway entry during oral transfer or the initial pharyngeal swallow. As the larynx descends, contrast remaining in the pyriform sinuses spills below the vocal folds. The patient does not cough. Which description captures both the timing and mechanism of this event?
Correct answer: B - Silent aspiration after the swallow from retained pharyngeal residue.
A patient with no previous shoulder surgery undergoes an arthrogram for persistent weakness after a fall. Needle placement is confirmed within the glenohumeral joint. Contrast then traverses a discrete defect in the supraspinatus tendon into the subacromial-subdeltoid bursa, away from the needle track. What does this communication establish?
Correct answer: C - A full-thickness supraspinatus tear.
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