Board-prep, core-curriculum, call-prep, and case-of-the-week material.
In retrospective study of 167 HCC lesions on MRI, moderate-to-severe hepatic iron overload independently reduced LR-5 assignment (OR 0.08, 95% CI 0.02–0.28) and altered key LI-RADS features: washout and capsule.
CT and ultrasound revealed a markedly enlarged ovary with central edema, peripheralized follicles, and absent internal Doppler flow in a patient with right pelvic pain. These findings represent the classic imaging triad of ovarian torsion, where venous obstruction causes hemorrh…
The FDA approved Bayer's Ambelvist (gadopiclenol), a high-relaxivity macrocyclic gadolinium-based contrast agent that delivers diagnostic efficacy at half the standard gadolinium dose. It is indicated for MRI of the CNS and body in patients aged 2 years and older, potentially lo…
C-TIRADS ≥4B yielded 75.7% sensitivity, 75.8% specificity (AUC 0.784) for thyroid malignancy—not significantly different from Kwak TI-RADS (P>0.05) in 272 surgically confirmed cases (retrospective).
On coronal MRI, direct contact between the posterior tibial tendon and the talar head indicates a tear of the superomedial spring ligament — a fast, reliable imaging finding.
Hounsfield units (HU) quantify tissue attenuation in CT, calculated from linear attenuation coefficients relative to water. This video explains HU calculation and clinical importance—high-yield for radiology physics exams, covering a core concept for board prep.
The Radiology Assistant reviews the RECIST 1.1 criteria for tumor response assessment, covering target lesion selection, measurement, and response categories, with a look at newer immunotherapy-specific criteria like iRECIST.
A comprehensive overview details the systematic approach to interpreting cervical spine anatomy on trauma radiographs, emphasizing normal landmarks and alignment to avoid missed injuries.
MRI is essential for detecting potentially surgical epileptogenic lesions. Dedicated epilepsy protocols with 3D T1, high-resolution T2/FLAIR, and susceptibility-weighted sequences increase sensitivity. Early imaging can identify hippocampal sclerosis, focal cortical dysplasia, a…
An AI system detected clavicle fractures on AP radiographs with 95.8% sensitivity, 98.9% specificity, and AUC 0.95—performance comparable to an experienced orthopedic surgeon in a single-center retrospective study of 367 exams. Second-plane view results were similarly high.
AI-assisted biparametric MRI (uAI, United Imaging) raised novice-reader AUC from 0.684 to 0.744 and sensitivity from 0.71 to 0.79 at PI-RADS ≥3 in 646 men; experienced-reader sensitivity gains were smaller and nonsignificant (p=0.344/0.291). Retrospective.
In 220 spontaneous intracranial hypotension patients, Bern SIH score peaked at ~4–9 weeks of symptoms (median score 8–7) then fell by >1 year (median score 4). A low score in long-standing disease should not rule out SIH — imaging findings are time-dependent.
In 509 pediatric patients from a 10-yr national registry, transcatheter arterial embolization achieved 97.1% hemorrhage control with mortality similar to surgery (22.3% vs 22.6%; OR 0.98, 95% CI 0.66–1.45). TAE use rose 256% 2013–2023. Conservative-managed patients had lower mor…
Updated ACR guidelines recommend MRI abdomen/pelvis ± contrast, contrast CT chest/abdomen/pelvis, and FDG-PET/CT or PET/MRI for adrenocortical carcinoma staging. For pheochromocytoma, DOTATATE PET/CT or PET/MRI is preferred; MIBG SPECT/CT remains acceptable, especially to assess…
CT-based radiomics with an SVM classifier predicted high PD-L1 expression (≥50%) in NSCLC with AUC 0.83 (IQR 0.63-0.92) in a small retrospective study of 55 patients. Clinical data did not improve performance; texture features were most informative. Not yet externally validated.
Tracking how a woman's AI risk score increases between two screening mammograms predicts future breast cancer better than the most recent score alone. Women with the fastest score rises had a significantly higher risk. If prospective data confirm this, the velocity metric could…
A novel brain MRI finding often described as "dirty" white matter in older adults shows no significant association with increased dementia risk, according to a new study. Researchers found this common appearance, distinct from typical white-matter hyperintensities, is largely be…
A twisted vascular pedicle ('whirl sign') on CT is the hallmark of ovarian torsion, a surgical emergency. This case showed a large cystic adnexal mass with four twists around its pedicle, resulting in infarction. Ovarian masses >5 cm greatly increase torsion risk.
Abdominal cocoon (encapsulating peritoneal sclerosis) is a rare complication of long-term peritoneal dialysis, seen on CT as calcified fibrotic peritoneal thickening encasing bowel loops and causing obstruction. Prompt recognition prevents mismanagement.
In axial spondyloarthritis, degenerative spine lesions progress in a specific sequence: MRI disk degeneration strongly predicted later herniation (OR 3.97), Modic type 1 predicted Modic type 2 (OR 49.36), and MRI lesions predicted radiograph lesions at the same level (OR 2.49).
A three-round Delphi consensus of 33 MSK experts from 23 institutions achieved 100% agreement on standardized MRI reporting terms for 11 knee meniscus topics, including tear criteria, possible tears, and postoperative assessment—though not yet externally validated.
Deep learning AI now matches human experts in recognizing complex imaging patterns from CT, MRI, and nuclear medicine, a review finds. Rapid growth is seen, but real-world validation remains limited.
Structured MRI review of atrophy patterns aids differential diagnosis of common dementias, including Alzheimer's disease, frontotemporal lobar degeneration, and vascular cognitive impairment. Specific regional scores and visual rating scales are presented for clinical use.
Radiology Masterclass published a visual guide to common anatomical variants on chest radiography that can mimic pathology, ranging from bone islands to normal vascular contours, to reduce false-positive interpretations by radiologists and trainees.
Cavitating mesenteric lymph node syndrome is a rare but severe complication of celiac disease characterized on CT by cystic, low-attenuation mesenteric nodes with fatty-fluid levels—a finding that should prompt urgent workup for refractory celiac disease or evolving lymphoma.
3D T1 VIBE detects intracavernous cranial nerves far better than MPRAGE in neuro-ophthalmic MRI. In 54 exams, VIBE visualized CN V1 in 65–70% vs 6–9% and CN VI in 70–78% vs 19–22% for MPRAGE (all p<0.001), suggesting VIBE should be the preferred sequence.
In 2,652 CT exams (4.1% fracture prevalence), Aidoc AI detected acute cervical spine fractures with sensitivity 89.1% vs 94.5% for radiologists; combined sensitivity/specificity favored radiologists (p=0.02). Single-center retrospective study.
A Maine jury awarded $23M — reportedly the largest non-death malpractice verdict in state history — against Northern Light Health after a radiologist failed to identify a spinal cord injury on CT. Case underscores high-stakes liability in emergency spine imaging.
A fetal vestibular aqueduct angular trajectory (ATVA ≥140°) — the CT marker of the Meniere's disease hypoplastic endotype — also appears in congenital temporal bone anomalies without Meniere's. Found in 8 ears across 6 patients in a 98-patient retrospective cohort; clinical cont…
The proportion of radiologists performing any IR-related work fell from 70% in 2008 to 50% by 2023, per new JVIR research — suggesting IR is consolidating into a smaller, more specialized subset of the workforce.
