Category Archives: Musculoskeletal Imaging

Shoulder Scapular Y
4
Feb

Overview

The scapular Y view projects the scapula in a lateral orientation to evaluate humeral head position relative to the glenoid. It is useful for detecting anterior and posterior shoulder dislocations. The Y configuration is formed by the acromion coracoid and scapular body.

Technique

Position the patient in a true lateral with the affected shoulder centered and the arm in neutral. Align the detector to include the entire scapula and humeral head. Use breath hold to minimize motion artifact.

Clinical Indications

Scapular Y is indicated for trauma and suspected dislocation when axillary views are not possible. It helps determine direction of dislocation and associated fractures. Correlate with clinical exam and consider CT for complex injuries.

Image Assessment

Assess the relationship of the humeral head to the glenoid and acromion. Look for associated fractures of the scapula or proximal humerus. Document dislocation direction and recommend reduction or orthopedic consultation.

Knee AP Weightbearing
4
Feb

Overview

AP weightbearing knee radiographs evaluate joint space narrowing and alignment under physiologic load. The patient stands with equal weight on both legs and the detector centered to the knees. This view is important for osteoarthritis assessment and preoperative planning.

Technique

Position the patient standing with knees extended and center the detector to the joint line. Use consistent weightbearing technique and include both knees for comparison when indicated. Collimate to the knee and use appropriate exposure.

Clinical Indications

Weightbearing AP knee is indicated for osteoarthritis evaluation and symptomatic joint assessment. It reveals joint space narrowing and varus or valgus deformity under load. Non weightbearing views may underestimate degenerative change.

Image Assessment

Assess medial and lateral joint spaces alignment and presence of osteophytes. Evaluate subchondral sclerosis and cystic change. Report findings relevant to conservative or surgical management.

Axillary Shoulder View
4
Feb

Overview

The axillary shoulder view visualizes the glenohumeral joint from an inferior superior perspective. It is valuable for detecting dislocation and assessing joint congruity. The view requires patient cooperation and appropriate arm positioning.

Technique

Obtain the axillary view with the arm abducted and the detector placed superior to the shoulder. Alternative techniques such as the Velpeau or modified axillary may be used for patients unable to abduct. Ensure proper centering to include the glenoid and humeral head.

Clinical Indications

Axillary view is indicated for suspected dislocation and evaluation of glenoid fractures. It complements AP and Grashey views for comprehensive shoulder assessment. Use alternative projections when abduction is limited.

Image Assessment

Evaluate the glenohumeral joint space and humeral head position. Inspect for fractures of the glenoid rim and humeral head. Report findings that affect reduction and surgical planning.

Scapula AP and Lateral
4
Feb

Overview

AP and lateral scapula views evaluate the scapular body spine and glenoid for fractures and deformity. The AP view images the scapula en face while the lateral view profiles the scapular body. These projections are used in trauma and shoulder pathology assessment.

Technique

For AP scapula position the arm across the chest and center the detector to the scapula. For lateral scapula rotate the patient to project the scapula laterally with the arm raised. Use appropriate exposure and immobilize the patient.

Clinical Indications

Scapula views are indicated for trauma with shoulder girdle injury and persistent localized pain. They detect scapular body fractures and glenoid rim involvement. CT is used for complex fractures and surgical planning.

Image Assessment

Assess scapular body contour spine acromion and glenoid rim for cortical disruption. Evaluate for associated rib or clavicle injuries. Report findings relevant to orthopedic referral.

Forearm AP and Lateral
4
Feb

Overview

AP and lateral forearm radiographs evaluate the entire radius and ulna including wrist and elbow joints. These views are essential for detecting shaft fractures and assessing alignment. Proper positioning ensures both joints are included for comprehensive assessment.

Technique

Obtain AP view with the palm up and the forearm flat on the detector. For lateral view flex the elbow 90 degrees and superimpose the radius and ulna. Use appropriate exposure and immobilize the limb to reduce motion.

Clinical Indications

Forearm series are indicated for trauma pain and suspected shaft fractures or dislocations. They assess for malrotation and joint involvement. CT is used for complex fractures and preoperative planning.

Image Assessment

Inspect cortical continuity alignment and joint congruity at the wrist and elbow. Evaluate for plastic deformation in pediatric patients and growth plate involvement. Document displacement and recommend orthopedic follow up when indicated.

Elbow Radial Head View
4
Feb

Overview

The radial head view profiles the radial head and neck to detect subtle fractures and impaction injuries. The projection is obtained with the elbow flexed and the beam angled to profile the radial head. This view complements standard AP and lateral elbow radiographs.

Technique

Position the elbow in partial flexion and rotate the hand to profile the radial head. Use a small focal spot and tight collimation for detail. Immobilize the limb to minimize motion artifact.

Clinical Indications

Radial head views are indicated for trauma with lateral elbow pain and suspected radial head fracture. They help detect nondisplaced fractures that may be occult on standard views. CT or MRI may be used for complex or occult injuries.

Image Assessment

Evaluate radial head cortical continuity articular surface and neck for fracture lines. Assess for joint effusion and associated capitellar injury. Report findings relevant to orthopedic management.

Wrist Carpal Tunnel View
4
Feb

Overview

The carpal tunnel tangential view images the pisiform and volar aspect of the carpal bones to evaluate for pisotriquetral pathology and space occupying lesions. The beam is angled tangentially to the carpal tunnel. This projection is used selectively for specific clinical questions.

Technique

Position the wrist in hyperextension with the beam angled tangentially to the carpal tunnel. Center to the pisiform and use a small focal spot for detail. Immobilize the wrist to reduce motion and ensure reproducibility.

Clinical Indications

Carpal tunnel view is indicated for suspected pisiform fractures ganglia or space occupying lesions causing median nerve compression. It complements standard wrist series and ultrasound or MRI for soft tissue evaluation. Use selectively due to patient discomfort in hyperextension.

Image Assessment

Assess pisiform integrity volar carpal contour and presence of calcified or radiopaque lesions. Correlate with clinical signs of median nerve compression. Recommend further imaging such as MRI for soft tissue characterization.

Scaphoid Axial View
4
Feb

Overview

The axial scaphoid view images the scaphoid in a different plane to better visualize the proximal pole and waist. It is obtained with specialized positioning to elongate the scaphoid. This view aids in detecting fractures that may be occult on standard projections.

Technique

Position the wrist in ulnar deviation and apply a specific tube angle to project the scaphoid axially. Center to the scaphoid and use tight collimation for detail. Immobilize the wrist to minimize motion artifact.

Clinical Indications

Axial scaphoid views are indicated when standard scaphoid projections are inconclusive and clinical suspicion remains high. They help detect proximal pole fractures and guide immobilization decisions. MRI or CT is used for definitive diagnosis when radiographs are negative.

Image Assessment

Inspect the scaphoid waist and proximal pole for cortical disruption and sclerosis. Evaluate for associated radial styloid fractures and carpal instability. Report findings and recommend advanced imaging if needed.

Thumb AP and Lateral
4
Feb

Overview

AP and lateral thumb radiographs evaluate the first metacarpal and phalanges for fractures and dislocations. The thumb is positioned separately from the hand to avoid overlap. These views are standard for thumb trauma and degenerative assessment.

Technique

Obtain AP view with the thumb extended and the lateral view with the thumb in true lateral. Use tight collimation and a small focal spot for optimal detail. Immobilize the thumb to reduce motion.

Clinical Indications

Thumb series are indicated for trauma pain and suspected Bennett or Rolando fractures. They assess joint congruity and articular surface involvement. CT is used for complex intra articular fractures.

Image Assessment

Evaluate cortical continuity base of first metacarpal and articular surface for displacement. Assess for subluxation and associated soft tissue injury. Report findings relevant to hand surgery referral.

Forefoot Weightbearing AP Oblique
4
Feb

Overview

Weightbearing AP oblique forefoot radiographs assess metatarsal alignment and forefoot deformities under physiologic load. The oblique projection profiles the lateral column and metatarsal heads. These views are useful for hallux valgus and metatarsal pathology assessment.

Technique

Obtain the oblique projection with the patient standing and bearing weight equally. Center to the metatarsal heads and use appropriate exposure for increased soft tissue thickness. Ensure consistent foot rotation for serial comparison.

Clinical Indications

Weightbearing oblique views are indicated for deformity assessment forefoot pain and preoperative planning. They reveal functional alignment and joint subluxation not seen on non weightbearing studies. Orthotic and surgical planning rely on weightbearing imaging.

Image Assessment

Evaluate metatarsal alignment hallux valgus angle and joint congruity under load. Assess for metatarsal head overload and subluxation. Report findings relevant to podiatric or orthopedic management.