Level One Radiology

An independent emergency radiology publication. Clinical deep-dives, teaching cases, and field notes from a practicing radiologist.

An independent emergency radiology publication. Clinical deep-dives, teaching cases, and field notes from a practicing radiologist.

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Latest entry In This Orbital Fracture, the Soft Tissues Show the Most Important Finding Jul 14, 2026

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NEURO EDUCATIONAL

Using the Case Viewer

A quick guide to the interactive stack viewer. Tap to activate, drag to scroll the series, switch windows, and open fullscreen to pan, zoom, and tune.

Jul 9, 2026
AI & POLICY COMMENTARY

What the 2025 ACR AI Guidelines Mean for Emergency Radiology

The ACR's 2025 framework makes site-specific validation and continuous monitoring the price of deploying clinical AI. Why that's right, and what it leaves open.

Feb 5, 2026
ABDOMEN EDUCATIONAL

Closed-Loop Obstruction on CT: Two Transition Points

The CT findings that separate simple from closed-loop small bowel obstruction, why a closed loop strangulates faster, and the enhancement check that predicts ischemia.

Jan 28, 2026
TRAUMA EDUCATIONAL

Approach to Splenic Trauma on CT: A Systematic Framework

A structured approach to splenic injury on CT: what the AAST grade is really asking, and the vascular survey that drives management.

Jan 15, 2026

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TRAUMA EDUCATIONAL

In This Orbital Fracture, the Soft Tissues Show the Most Important Finding

An orbital floor fracture where the finding that changes management is in the soft tissues: a rounded, edematous inferior rectus muscle that means entrapment.

Jul 14, 2026
MSK EDUCATIONAL

Pronation-External Rotation Ankle Injuries

How a pronation-external rotation ankle injury fails from the medial side out, why the fibula breaks high in a Weber C, and when to image the whole leg.

Jul 11, 2026
CHEST EDUCATIONAL

Pneumothorax on the Supine Radiograph: Where the Air Actually Goes

Supine pleural air collects anteriorly, not at the apex. The deep sulcus sign, the etched mediastinal edge, and where pneumothorax hides in the trauma bay.

May 13, 2026
MSK CASE ANALYSIS

Lisfranc Injury on CT: The One Joint to Check

A case-based walk through Lisfranc injury: the midfoot anatomy, the fleck sign, the alignment checks that catch it, and the report that gets it fixed.

Apr 8, 2026
NEURO EDUCATIONAL

Window and Level on CT: What Radiologists Do With the Mouse

What CT window width and window level actually control, why no single window shows everything, and which preset to reach for on a head CT.

Mar 11, 2026