6. Imaging Indications
• Imaging often not necessary
• May be appropriate in the following
circumstances
– Suspected obstruction
– High risk (diabetes, immunocompromise)
– Uncertain diagnoses
– Previous renal abnormality
21. Valsalva
• SVC with bright contrast, IVC not well
opacified, with mixing around the right atrium
• Important to differentiate from imprecise
contrast bolus timing as you can potentially
repeat a PE CT if there is valsalva
• Repeat the study on expiratory phase