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→How much contrast is needed: Corrected
====How much contrast is needed====
This depends on the issue at hand. Examples are:
*Liver: Each 1 mg In males at 30 years of age, there is an estimated 0.027 HU of iodine liver parenchymal enhancement per kilogram of patient body weight (such as each 0.2 ml and per gram of 350 mg/ml contrast in a 70 kg patient) generates a liver enhancement of about 96 HUiodine.<ref name="Bae2010">{{cite journal|last1=Bae|first1=Kyongtae T.|title=Intravenous Contrast Medium Administration and Scan Timing at CT: Considerations and Approaches|journal=Radiology|volume=256|issue=1|year=2010|pages=32–61|issn=0033-8419|doi=10.1148/radiol.10090908}}</ref>For example, a body weight of 70 kg and 125 ml of iodine at a concentration of 350 mg/ml confers an expected enhancement of 83 HU.
*Thorax:
:*For [[CT of pulmonary embolism]] in patients with risk factors, dual energy CTA (such as 90/150SnkVp) is feasible even at iodine doses of 6g (such as 15 ml of 370 mg/ml of iodine).<ref name="LeroyerMeier2016">{{cite journal|last1=Leroyer|first1=Christophe|last2=Meier|first2=Andreas|last3=Higashigaito|first3=Kai|last4=Martini|first4=Katharina|last5=Wurnig|first5=Moritz|last6=Seifert|first6=Burkhardt|last7=Keller|first7=Dagmar|last8=Frauenfelder|first8=Thomas|last9=Alkadhi|first9=Hatem|title=Dual Energy CT Pulmonary Angiography with 6g Iodine—A Propensity Score-Matched Study|journal=PLOS ONE|volume=11|issue=12|year=2016|pages=e0167214|issn=1932-6203|doi=10.1371/journal.pone.0167214}}</ref>
