7 results
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
COVID-19 Patterns ... on Chest CT 1. ... ARDS 3. ... Pulmonary #ChestCT #radiology ... #CTChest #diagnosis
Radiographic appearances of pulmonary diseases in HIV/AIDS Patients
 • Diffuse Interstitial Infiltrates: Pneumocystis jirovecii, M.tuberculosis, Histoplasma
toxicity, Pulmonary edema ... Actinomyces spp., NHL; Lung ... pneumonia • Cavitary ... #diagnosis #chestCT ... #radiology
Crazy Paving on Chest CT
 • Thickened interlobular septa in a background of diffuse GGO's.
 •
CT • Thickened ... DDx: PAP, pulm edema ... pna, pulm hge, ARDS ... #Lung #Pulmonary ... #diagnosis #radiology
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Left Shunt - Anatomic ... : Atelectasis, ARDS ... Mismatch: Pulmonary Edema ... Hypoxia #hypoxemia #differential ... #diagnosis
Pulmonary Infections in HIV-AIDS
Bacterial: 
 • No organism identified, Strep pneumoniae, H. influenzae, S.aureus, Streptococcus Grp
Infections in HIV-AIDS ... embolism, Pulm edema ... failure, COPD, Lung ... CXR +/- High res CT ... HIVAIDS #workup #diagnosis
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
in HIV - Differential ... Diagnosis Framework ... • CT: Halo sign ... fever, cough and cavitary ... Infections #HIV #AIDS
CT will also demonstrate signs of congestive heart failure.
On the image on the left notice the
CT will also demonstrate ... be high in the differential ... diagnostic list ... #Clinical #Radiology ... #CTChest #CHF #