Overview
The AP semi upright chest radiograph is used when full upright positioning is not possible. The patient sits or reclines with the detector behind the back. This view provides better visualization than supine imaging while accommodating limited mobility.
Technique
Ensure the detector is positioned to capture the entire thorax and instruct the patient to inhale. Use support devices to stabilize the patient and minimize motion. Record the degree of upright positioning on the study.
Clinical Indications
Semi upright AP chest is useful for patients with limited tolerance for standing. It aids in assessing pulmonary edema pleural effusion and lines. It is a compromise between supine and full upright imaging.
Image Assessment
Account for projectional differences when evaluating heart size and lung volumes. Look for layering pleural fluid and central vascular congestion. Recommend upright imaging if clinical condition allows for improved assessment.