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Images of before and after segmentectomy. (a) Axial image of CT before surgery, showing lung cancer in posterior apical segment of the left upper lobe. (b) Sagittal image of the lung-perfusion single-photon-emission computed tomography and CT (SPECT/CT) of the left upper lobe before operation. (c) Sagittal image of the lung-perfusion SPECT/CT of the remaining lingular segment after resection of upper division segmentectomy.
