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Fig. 2 | EJNMMI Research

Fig. 2

From: A semi-automatic technique to quantify complex tuberculous lung lesions on 18F-fluorodeoxyglucose positron emission tomography/computerised tomography images

Fig. 2

Example of volumes of interest (in red) required for quantification. a Lung mask, on the combined CT images from baseline and follow-up scans. b Volume of structures surrounding the lung affecting motion misregistration (usually the mediastinum, liver and spleen) drawn on the overlaid PET images. We then deleted overlapping areas on the lung mask to leave only areas unaffected by misregistration. c Binary image representing the final lung mask. d Reference volumes of normal lung tissue, represented by two spheres in opposite lungs or ipsilateral lobes. It is also drawn on the overlaid CT images, but viewed alongside the PET images to ensure that it represents lesion-free lung

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