(Fig 5-B.15) MRI Finding of Fracture Line

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https://youtu.be/9qehWGE9dp4

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📌MRI Finding of Fracture Line

✅ Acute Traumatic Condition

• In the acute setting, the fracture line is best shown on T1-weighted MR images as a linear hypointensity.
• The fracture line may be less conspicuous on T2-weighted images when it is hyperintense and surrounded by bone marrow edema. 
• However, if there is a component of trabecular impaction, the fracture appears hypointense on both T1- and T2-weighted MR images, similar to the appearance of stress fractures.

 

✅ Trabecular Impaction and Stress Fractures

• Trabecular impaction causes the fracture to be hypointense on both T1- and T2-weighted MR images. This appearance is similar to stress fractures.

 

Summary of Fracture Line Appearance

• T2-weighted images: Hyperintense fracture surrounded by bone marrow edema, making it less conspicuous unless trabecular impaction is present, which makes the fracture hypointense on both T1 and T2 images.

 

Reference

RadioGraphics 2018; 38:1478–1495

"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery"

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#MRI, #FractureLine, #T1Weighted, #T2Weighted, #BoneMarrowEdema, #TrabecularImpaction, #StressFractures, #Hypointensity, #Radiology, #AcuteSetting