18 results
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
Lung Findings on Chest ... CT 1. ... Reverse Halo Sign ... Halo Sign 6. ... #CTChest #diagnosis
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
Halo Sign on Chest ... CT • SPN or mass ... .2016.12.033 #Halo ... #Sign #CT #Lung ... #Pulmonary #diagnosis
Atoll Sign (Reverse-Halo Sign) on Chest CT
 • Central GGO surrounded by a crescentic or circumferential
Atoll Sign (Reverse-Halo ... Sign) on Chest ... CT • Central GGO ... #Sign #CT #Lung ... #Pulmonary #diagnosis
Venn Diagram - Does this patient have pneumonia?
Diagnosis is generally based on three lines of evidence:
evidence of a chest ... infiltrate (e.g., CXR, CT ... symptoms (e.g., ... production, pleuritic chest ... pain) and signs
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
bronchial wall injury ... inflammation Symptoms ... Loss of weight • Chest ... Nasal polyps and signs ... high-resolution chest
Pulmonary Renal Syndromes - OnePager Summary
Autoimmune ANCA vasculitis (AAV): GPA (granulomatous with polyangiitis), EGPA (eosinophilic granulomatosis
quantify renal injury ... chest to evaluate ... or serologies + symptoms ... typically seen on chest ... CT
Tram Track Sign on Chest CT
 • Parallel, non-tapering airways, extending to the lung periphery.
 •
Tram Track Sign ... on Chest CT • Parallel ... ABPA Kartagener's syndrome ... #CT #Lung #Pulmonary ... #diagnosis #radiology
Abnormalities in Rate and Rhythm of Breathing 
Normal 
The respiratory rate is about 14—20 per min
disease, pleuritic chest ... hyperventilation syndrome—a ... Occasional sighs ... #Pulmonary #Abnormalities ... #Abnormal #Diagnosis
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) 
- Respiratory symptoms must have begun within one
Respiratory Distress Syndrome ... - Respiratory symptoms ... be present on a chest ... computed tomographic (CT ... Definition #Criteria #Diagnosis
Rare Causes of Abdominal Pain
 • Hereditary Angioneurotic Edema - Recurrent visceral that may by swelling
- May involve symptoms ... neuropsychiatric symptoms ... in the knee-to-chest ... Positive Carnett's sign ... #differential #diagnosis