radiology cancer ct liver imaging surgery anatomy manzoor haseeb american college of radiology risk malignancy lesión 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 lung right lobe atelectasis lobar rml lymph thoracic map iaslc metastasis international association for study of lung cancer thorax nodes stations ett tube endotracheal cpr airway operation stitches sutures inguinal scrotal
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