MR Contrast Agents: Physics
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MR Contrast Agents Physics Q&A's
- Why are most MR contrast agents based on the element gadolinium?
- How does gadolinium cause relaxation?
- What is meant by the relaxivity of a contrast agent? How is it measured?
- Why does gadolinium apparently only shorten T1? Doesn't it have an effect on T2 as well?
- Can the T2-shortening effects of gadolinium ever be observed on routine MR imaging?
- Does contrast enhancement depend on field strength? Do I need more contrast or less at higher fields?
- Is there a best T1-weighted pulse sequence for showing contrast enhancement?
- Don't higher doses of contrast show more enhancing lesions? Are there other ways to achieve this effect?
- What is dynamic contrast-enhanced (DCE) imaging?
- Is iodine contrast visible on MRI? Is gadolinium contrast visible on CT?
MR Contrast Agents Physics Topics