Tag Archives: oblique

Foot Oblique
4
Feb

Overview

The oblique foot radiograph rotates the foot to separate metatarsal heads and reveal fracture lines. This projection improves visualization of the cuboid and navicular bones. It is routinely obtained with AP and lateral views for complete assessment.

Technique

Rotate the foot approximately 30 to 45 degrees and center the detector to the mid foot. Use tight collimation and a small focal spot for optimal detail. Immobilize the foot and ensure consistent rotation for follow up comparisons.

Clinical Indications

Oblique foot views are indicated for trauma and suspected occult fractures. They help visualize the tarsometatarsal joints and lateral column. Correlate with clinical findings and consider CT for complex injuries.

Image Assessment

Inspect cortical continuity and joint alignment and evaluate for small intra articular fragments. Assess the cuboid navicular and cuneiform bones for injury. Report findings relevant to orthopedic or podiatric management.

SI Joint AP Oblique
4
Feb

Overview

AP oblique views of the sacroiliac joints profile the joint space and sacral ala for inflammatory and traumatic changes. The patient is rotated to place the SI joint of interest perpendicular to the detector. These views aid in detecting erosions sclerosis and joint space narrowing.

Technique

Rotate the patient approximately 25 to 30 degrees to the side of interest and center the detector to the sacroiliac joint. Use appropriate exposure and immobilize the patient to reduce motion. Obtain bilateral obliques for comparison when indicated.

Clinical Indications

SI joint obliques are indicated for suspected sacroiliitis trauma and pelvic pain. They help detect erosive changes and joint space irregularity. MRI provides superior soft tissue and early inflammatory detection when needed.

Image Assessment

Assess joint space symmetry erosions and subchondral sclerosis. Evaluate for sacral fractures and adjacent pelvic pathology. Report findings relevant to rheumatologic or orthopedic management.

Shoulder Grashey AP Oblique
4
Feb

Overview

The Grashey AP oblique shoulder view aligns the glenoid en face to evaluate joint space and glenoid rim. The patient is rotated approximately 35 to 45 degrees toward the affected side. This view is valuable for assessing glenoid fractures and degenerative change.

Technique

Rotate the patient toward the affected shoulder and center the detector to the glenohumeral joint. Use a true oblique to profile the glenoid without overlap from the humeral head. Ensure consistent exposure and include the scapular neck.

Clinical Indications

Grashey view is indicated for suspected glenoid fracture instability and arthritis. It provides accurate assessment of joint space narrowing and rim defects. It complements standard AP and axillary views for comprehensive shoulder evaluation.

Image Assessment

Inspect the glenoid rim for fracture and the joint space for narrowing or osteophytes. Evaluate humeral head position and subchondral changes. Report findings relevant to surgical planning and instability assessment.

Hand Oblique
4
Feb

Overview

The oblique hand radiograph rotates the hand approximately 45 degrees to profile metacarpals and phalanges. This projection reduces overlap and improves detection of fractures. It is routinely obtained with PA and lateral views for comprehensive assessment.

Technique

Rotate the hand laterally about 45 degrees and center the detector to the third metacarpal. Ensure consistent rotation and immobilize the hand to minimize motion. Use appropriate collimation to include the entire hand.

Clinical Indications

Oblique hand views are indicated for trauma and suspected occult fractures. They help visualize metacarpal neck and shaft injuries and joint subluxations. Correlate with clinical exam and consider CT for complex fractures.

Image Assessment

Inspect cortical margins for fracture lines and evaluate joint congruity. Assess for rotational deformity and malalignment. Report findings and recommend orthopedic follow up when indicated.

Finger Oblique
4
Feb

Overview

The oblique finger radiograph rotates the digit to separate cortical margins and reveal fracture lines. This projection reduces overlap and enhances detection of small fractures. It is routinely obtained with PA and lateral views for complete evaluation.

Technique

Rotate the finger approximately 45 degrees and center the detector to the affected phalanx. Use tight collimation and a small focal spot for optimal detail. Ensure patient comfort and immobilize the digit to minimize motion.

Clinical Indications

Oblique finger views are indicated for trauma and suspected occult fractures. They help visualize avulsion fragments and joint surface involvement. Correlate with clinical findings and consider follow up radiographs for healing.

Image Assessment

Evaluate cortical continuity and joint alignment and look for small intra articular fragments. Assess soft tissue swelling and tendon avulsion sites. Document findings relevant to orthopedic management.

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.

Rib Oblique
4
Feb

Overview

Oblique rib views rotate the patient to project ribs away from the spine and thoracic structures. This technique improves visualization of rib contours and fracture lines. Both anterior and posterior rib segments can be assessed with targeted obliques.

Technique

Rotate the patient toward the side of interest and center the detector to the rib region. Use appropriate exposure and include the costochondral junction when indicated. Obtain both ipsilateral and contralateral obliques if necessary.

Clinical Indications

Oblique ribs are used when AP views are inconclusive or when detailed assessment of a specific rib is required. They are helpful in trauma and persistent localized pain. Correlate with clinical exam and consider CT for complex injuries.

Image Assessment

Inspect the cortical margins for discontinuity and displacement. Evaluate adjacent soft tissues and lung fields for associated injury. Report fracture location relative to anatomic landmarks for surgical planning if needed.

Pelvis Judet Views
4
Feb

Overview

Judet views are oblique pelvic radiographs that profile the anterior and posterior acetabular columns. They are obtained in two oblique positions to assess column integrity and fracture patterns. These views aid in initial assessment of acetabular trauma.

Technique

Rotate the patient 45 degrees to obtain iliac oblique and obturator oblique projections. Center the detector to the acetabulum and use appropriate exposure. Immobilize the patient and document positioning for comparison.

Clinical Indications

Judet views are indicated for suspected acetabular fractures and complex pelvic trauma. They help differentiate column involvement and guide surgical planning. CT is often used for definitive fracture mapping.

Image Assessment

Assess anterior and posterior column continuity acetabular roof and joint congruity. Look for intra articular fragments and displacement. Report findings to inform orthopedic management and operative approach.