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Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
areas. ... There are patchy areas ... lung - Normal lung ... #Pulmonary #CTChest ... #Attenuation #Differential
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
terms to describe areas ... is to describe areas ... #CXR #Lucency #Differential ... #Pulmonary #Diagnosis ... #Radiology
Head Cheese Sign on Chest CT
 • Juxtaposition of distinct radiographic areas of low, normal and
distinct radiographic areas ... of low, normal ... Cheese #Sign #CT #Lung ... #Pulmonary #diagnosis ... #radiology #clinical
On the left a patient with ground glass pattern in a mosaic distribution.
The clue here is
with ground glass pattern ... enlargement of pulmonary ... (arrow) in the areas ... #Clinical #Radiology ... #CTChest #GGO #
On the left a typical case of panlobular emphysema.
There is uniform destruction of the underlying architecture
to widespread areas ... of abnormally low ... Pulmonary vessels ... #Clinical #Radiology ... #CTChest #Panlobular
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
with areas of ground-glass ... attenuation and areas ... mid and lower lung ... included in the differential ... #CTChest #Chronic
On the left a patient who is treated with cytotoxic drugs for a hematologic malignancy.
The radiographic
radiographic findings are areas ... like idiopathic pulmonary ... consider drug-related lung ... disease in the differential ... #CTChest #DrugInduced
Authors: Mark M. Ramzy, DO, EMT-P (@MarkRamzyDO, EM Resident Physician, Drexel University, Department of Emergency Medicine)
This post will focus ... radiograph pattern ... defaulting to a normal ... #Radiology #CTChest ... #Lung #Pulmonary