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Click 52 year old female with lymphocytic interstitial pneumonia in the right lower lobe. Axial CT images of the chest demonstrate a focal region of discontinuous crescentic consolidation with central ground glass opacification (arrows) and some normal appearing lung in the superior segment of the right lower lobe, consistent with the reversed halo sign (Protocol: Phillips Brilliance 64 slice CT scanner, 186 mA, 120 kvp, 3mm slice thickness, CTDIvol, 9.135 mGy, 69mL Optiray 350 IV contrast at 2.2mL/s)

Click 52 year old female with lymphocytic interstitial pneumonia in the right lower lobe. Coronal CT images of the chest demonstrate a focal region of discontinuous crescentic consolidation with central ground glass opacification (arrows) and some normal appearing lung in the superior segment of the right lower lobe, consistent with the reversed halo sign (Protocol: Phillips Brilliance 64 slice CT scanner, 186 mA, 120 kvp, 3mm slice thickness, CTDIvol, 9.135 mGy, 69mL Optiray 350 IV contrast at 2.2mL/s)

Click 52 year old female with lymphocytic interstitial pneumonia in the right lower lobe. Sagittal CT images of the chest demonstrate a focal region of discontinuous crescentic consolidation with central ground glass opacification (arrows) and some normal appearing lung in the superior segment of the right lower lobe, consistent with the reversed halo sign (Protocol: Phillips Brilliance 64 slice CT scanner, 186 mA, 120 kvp, 3mm slice thickness, CTDIvol, 9.135 mGy, 69mL Optiray 350 IV contrast at 2.2mL/s)

Click 52 year old female with lymphocytic interstitial pneumonia in the right lower lobe. CT-guided trans-thoracic core biopsy of the lesion in the superior segment of the right lower lobe (Protocol: Siemens Volume, 200m, 5mm slices, 120kvp 250mA).