Tag Archives: alignment

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.

Whole Spine Lateral
4
Feb

Overview

Whole spine lateral radiographs evaluate sagittal alignment from cervical to sacral regions under physiologic load. They are used to assess global balance and plan corrective spinal surgery. Proper positioning ensures inclusion of all spinal segments.

Technique

Obtain a full length lateral radiograph with the patient standing and arms positioned to avoid obscuring the spine. Use consistent posture and include a calibration marker for measurements. Immobilize and instruct the patient to maintain natural stance.

Clinical Indications

Whole spine lateral views are indicated for deformity assessment adult spinal deformity and preoperative planning. They quantify sagittal vertical axis pelvic parameters and lumbar lordosis. Serial imaging monitors progression and postoperative outcomes.

Image Assessment

Measure sagittal vertical axis pelvic tilt pelvic incidence and lumbar lordosis. Assess for compensatory mechanisms and vertebral deformity. Report findings to guide surgical planning and alignment goals.