Basic MRI Musculoskeletal Anatomy

Musculoskeletal MRI Indications

• Sport related injuries

• Mensical abnormalities

• Osteonecrosis

• Bone marrow abnormalities

• Soft tissue masses

Musculoskeletal MRI Advantages

• Superior soft tissue contrast

• Mutliplanar

• Non invasive

• No ionizing radiation

Musculoskeletal MRI Disadvantages

• Expensive

• Limited availability

• Claustrophobia

Musculoskeletal MRI Disadvantages

• Artifacts (Metal foreign objects)

• Relatively long examination

• Calcifications

FAT

Bone marrow

Blood

Contrast

Air

Cortical bone

Tendon

Ligament

Blood vessels

Muscles

Hyaline Cartilage

Fluid

MRI Knee

ACL

PCL

Patellar tendon

ACL

ACL

Lateral Meniscus

Medial Meniscus

Lateral Medial Lateral Medial Meniscus MeniscusMeniscus Meniscus

Crescent shaped fibro-cartilage . Crescent shaped fibro-cartilage .

Their main functions are shock Their main functions are shock absorption and load–bearing. absorption and load–bearing.

MRI the Shoulder

MRI ShoulderIndications

• Rotator cuff tear

• Shoulder instability

• Osteonecrosis

• Infection

• Neoplasm

What is the rotator cuff?

• A group of flat tendons that surround the front, back, and top of the shoulder joint like a cuff on a shirt sleeve

Rotator cuff muscles

• Supraspinatous

• Infraspinatous

• Teres minor

• Subscapularis

neurovascular bundle

infraspinatus

subscapularis

biceps tendon

deltoid

subscapularis tendon

long head of the biceps

teres minor muscle

infraspinatus

suprapinatus

subscapularis tendon

glenoid labrum

bicipitaltendon

Acromion

Clavicle

Subscapularis

MRI of the Ankle

MRI Ankle: Why?

• Ligament

• Tendon

• Articular cartilage

• Infection

• Soft tissue masses

• Bone marrow

Ankle Ligaments

• Lateral collateral

• Medial collateral

• Syndesmotic ligamentous complex

Lateral Collateral Ligament

• Anterior talofibular

• Posterior talofibular

• Calcaneofibular ligament

Talofibular ligaments

Calcaneofibular ligament

Copyright ©Radiological Society of North America, 2000

Rosenberg, Z. S. et al. Radiographics 2000;20:S153-S179

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Normal calcaneofibular ligament

Deltoid ligament

MRI of the Hip Joint

Sartorius muscle

Iliacus muscle

Rectus femoris muscle

Tensor fascia lata