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RD5.1-4 | Core Image Interpretation Skills — Assignment

Grading Rubric — Systematic Emergency Radiograph Interpretation — Rubric

Criterion	Points	Full-marks descriptor
Systematic reading template and the role of projection	10 pts	Clear, ordered template; correctly explains why an erect film is needed and that a negative supine film does not exclude free air
Correct interpretation of the erect CXR (pneumoperitoneum) and exclusion of mimics	10 pts	Names free air under the diaphragm, explains pathophysiology, and confidently excludes Chilaiditi/basal lesion; notes CTR is projection-dependent
Supine abdominal film signs and reconciliation into one diagnosis	10 pts	Correctly uses Rigler sign for free air and distinguishes SBO (valvulae conniventes, full-lumen) from LBO (haustra, partial); unifies both films
Pitfalls, immediate action and reflection	10 pts	Identifies projection pitfalls, couples finding to immediate action, and reflects meaningfully on systematic reading under pressure