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radiology imaging liver ct cancer anatomy surgery lung right lobe atelectasis lobar rml scrotal inguinal lymph thoracic map iaslc metastasis international association for study of lung cancer thorax nodes stations ett tube endotracheal cpr airway operation stitches manzoor haseeb american college of radiology risk malignancy 濒别蝉颈贸苍 nodule ultrasound thyroid acr tirads thyroid imaging reporting & data system enhancement contrast hepatoma computed tomography medical traumatology trauma injury mirvis grading scale aast hepatic collapse middle sutures