AOBR Radiology common mistakes
AOBR Radiology · Understand the traps and how to avoid them.
Committing to a single diagnosis on a chest radiograph before systematically checking the hidden areas (apices, hila, retrocardiac region, costophrenic angles, below the diaphragm).
The salient finding (e.g., a dense lower-lobe consolidation) captures attention and search stops early; satisfaction-of-search is a well-documented perceptual bias, and the missed second finding is often in a less conspicuous zone.
What to do instead
Use a fixed anatomic checklist read aloud or mentally in the same order every film, and always do a deliberate second pass focused only on apices, hila, retrocardiac space, and subdiaphragmatic regions before finalizing.
Describing a focal pulmonary opacity as 'cannot exclude malignancy, recommend follow-up' without applying the size and morphology thresholds that determine whether short-interval CT, PET, or no further workup is appropriate.
Uncertainty feels safer than commitment, and candidates fear missing cancer more than they fear an indeterminate report; they have not internalized the management algorithm for incidentally detected nodules.
What to do instead
Memorize the nodule-management decision tree by size and density (solid vs subsolid) and practice writing the specific next step (e.g., '3-month CT', 'PET-CT', 'no follow-up needed') for each size band rather than a generic hedge.
Missing a subtle vascular catastrophe (early infarct, basilar thrombosis, venous sinus thrombosis, dissection) because the CT or MRI was read as 'no acute abnormality' without specifically interrogating the at-risk territories.
Early ischemia and venous occlusion are often isodense or low-contrast on standard sequences, and a normal-appearing study creates false reassurance that suppresses a targeted second look.
What to do instead
On every neuro study, explicitly check the vascular territories in a fixed sequence (MCA insular ribbon, basal ganglia, posterior fossa, dural sinuses, carotid/vertebral flow voids) and correlate with clinical timing; if the story fits, state the limitation of the study and recommend the next test (CTA/CTV, MRI with DWI).
Failing to distinguish hydrocephalus from ex-vacuo ventricular enlargement, or misclassifying a shunt malfunction, by not comparing ventricular size to prior imaging and not assessing transependymal edema and sulcal effacement.
Ventricles are large in both conditions, and without a prior comparison the reader anchors on the most dramatic feature; the discriminating signs (sulcal crowding, periventricular halo, temporal horn dilation) are underweighted.
What to do instead
Always request and compare the most recent prior, and systematically score four features: temporal horn size, periventricular edema, sulcal effacement, and interval change; state the diagnosis in terms of these features rather than 'enlarged ventricles'.
Overlooking a non-occlusive or distal vascular finding on angiography/CTA (e.g., a small distal embolus, a pseudoaneurysm, or a dissection flap) because the primary occlusion was identified and the read stopped there.
Once the dominant finding is found, peripheral vessels and vessel walls outside the immediate field of interest are not scrutinized; motion and overlapping structures further reduce conspicuity.
What to do instead
After identifying the main lesion, perform a structured distal-to-proximal sweep of every named vessel and the vessel wall, and review multiplanar reformats and maximum-intensity projections rather than axial source images alone.
Recommending or describing an intervention without checking the contraindications and pre-procedure prerequisites relevant to that specific procedure (coagulation status, renal function, contrast allergy, antibiotic prophylaxis, or anticoagulation management).
Candidates focus on the technical steps they have memorized and treat safety screening as a separate topic; in vignette format the critical lab value is often buried among normal values.
What to do instead
For each common procedure (biopsy, drainage, TIPS, embolization, line placement), maintain a one-line pre-procedure checklist and explicitly state the relevant threshold and the action if it is not met.
Misjudging the acuity or urgency of an abdominal finding (e.g., calling a closed-loop obstruction or pneumatosis 'nonspecific bowel gas' or deferring a perforation) and thereby recommending the wrong disposition.
The imaging signs of ischemia and strangulation are subtle and overlap with benign ileus, and candidates describe findings without translating them into a management urgency.
What to do instead
For every acute abdomen study, explicitly answer three questions in the report: is there obstruction, is there ischemia/strangulation, and is there free air or fluid; tie each answer to a disposition (emergent surgery, CT, observation).
Applying adult dosing, contrast volumes, or imaging thresholds to a child without adjusting for weight and age, or failing to consider radiation dose and the option of ultrasound/MRI first.
Adult protocols are the default mental template, and pediatric-specific dose and modality-selection rules are learned separately and are easy to forget under time pressure.
What to do instead
For any pediatric vignette, first state the weight-based or age-based adjustment and the modality-of-choice rationale (e.g., US before CT for pyloric stenosis, reduced-dose CT protocols) before discussing the finding.
Missing a developmental or syndromic diagnosis on a pediatric neuro or chest study because normal variants and age-specific appearances were interpreted as pathology, or vice versa.
The pediatric brain and chest evolve rapidly with age; candidates apply adult appearance standards and either overcall normal myelination or undercall a real malformation.
What to do instead
Anchor interpretation to the child's age: check myelination milestones, sutural and fontanelle appearance, and thymic silhouette against age norms, and name the specific age-dependent feature in the answer.
Describing a radiation oncology plan or target volume in general terms without specifying the relevant dose constraint, fractionation, or organ-at-risk tolerance for the scenario.
Candidates memorize disease indications but not the quantitative constraints, and vignettes reward the specific number or the named constraint over a qualitative statement.
What to do instead
Build a compact table of common OAR tolerances and standard fractionation schemes (e.g., spinal cord, parotid, lung, rectum) and practice answering each vignette by stating the constraint, the dose, and the trade-off explicitly.