MRI Of The Knee Joint By Dr. Mohamed Samieh Radiology Department

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Presentation transcript:

MRI Of The Knee Joint By Dr. Mohamed Samieh Radiology Department October 6 University

Mri Of the Knee joint Indications: -Knee joint complaint Pain Trauma Swelling Osteoarthritis -suspected pathology (pervious examinations) (contrast) Inflammation Tumors

Knee pain with normal MRI?! Kinematic Meniscal contusion Plicae

How to know the pulse sequences T1/ PD T2 Gradient STIR

COMMON MR APPEARANCES T1 T2 STRUCTURE OR LESIONS LOW Cortical bone Menisci(medial & lateral) Ligaments(ACL, PCL,..) Calcification

Common mr appearances T1 T2 Structure or lesions High Low Fat(subcutaneous, Lipoma,…) Bone Marrow Fluid(effusion, cyst, ganglion) Blood(haemoarthrosis)

Menisci (medial & lateral) Ligaments Items to be evaluated Where? Menisci (medial & lateral) Ligaments -Cruciate (ACL, PCL) -Collateral -Retinacular Tendons (Quadriceps, pattelar) Bones Synovial effusion Sagittal PD Coronal Axial Sagittal T1 & T2 Sagittal T2

Kinematic MRI

meniscus Medial meniscus Banana-shaped Posterior horn wider, Longer, taller than anterior horn Posterior horn tightly attached to the capsule Grade II degenration more common

meniscus Lateral meniscus C-shape Posterior and anterior horns are symmetric Anterior horn may be hypo plastic,extremely thin Discoid meniscus and meniscal cysts more common

B C A C A B

Lateral meniscus

Medial meniscus

Meniscal lesions Tear Degeneration Cyst discoid

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