Week 5 Flashcards
image modality, view, body depicted, abnormality
PA and Lateral chest xray, large perihilar mass in right lower lobe
Why not order total body CT when looking at nodule that could be cancerous?
- Un-necessary exposure to radiation– mass could not be cancer; could be big lung abcess (would have had fever) - Do not use whole body CTs for staging
-imaging modality -orientation -window -body part
-IV contrast enhanced CT -axial - chest - lung, soft tissue, bone
-imaging modality -orientation -window -body part -which image has contrast? -what is abnormality?
-CT -axial -soft tissue -abdomen -right image; -liver tumors
-imaging modality -weight? -orientation -window -body part
-MRI -T1 -Axial -brain -brain
Difference between T1 and T2 weighted
-T1: liquid is dark; can only see contrast on this type -T2: liquid is bright
What imaging modality is used? -what abnormalities are seen?
-left: noncontrast CT, brain, axial, brain window; right: IV contrast enhanced MRI, brain, axial, T1 weighter -left: edema; right: tumor and edema (R pariteal meiningioma)
imaging modality and orientation
-CT, PET, Fused
What is metabolized in PET scan?
Fluorodeoxyglucose (FDG) - metabolized like glucose; PET is map of glucose distribution in body
Why does bladder light up in PET scan?
normal, glucose is collecting there after being filtered out by kidneys
-imaging modality -orientation -window -body part -iv contrast -abnormality
-CT -axial -soft tissue -chest -yes -large l perihilar lung mass invading left pulmonary artery
-imaging modality -orientation -window -body part -iv contrast -abnormality
-CT -axial -lung -chest -yes -left lung carcinoma
what do hazy edges of a tumor on a CT mean?
-cancer is invading surrounding tissue
-imaging modality -weight -orientation -window -body part -iv contrast -abnormality
-MRI -T1 -Axial - brain - brain -yes -metastatic small cell lung cancer
-imaging modality -weight -orientation -window -body part -iv contrast -abnormality
-MRI -T2 -axial -brain -brain -cant tell -glioblastoma multiforme
-imaging modality -orientation -body part -abnormality
-PET-CT fused image -axial -neck -bilateral squamous cellw carcinoma of the tonsils with nodal metastasis
-modality -weight -orientation -body part -contrast -abnormality
-MRI -T2 -saggital -cervical spine -can’t tell with T2 -intramedullary cervical cord tumor
-modality -weight -orientation -body part -contrast -abnormality
-MRI - T1 -sagittal -thoracic spine -yes -hemangioblastoma
-modality -weight -orientation -body part -contrast -abnormality
-MRI -T1 -axial -brain -yes -multiple metastes with vasogenic edema
-modality -orientation -body part -contrast -abnormality
-CT -axial -brain -non-contrast -metastatic melanoma
