Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is technically limited due to flexed position of the head and neck resulting in obscuration of the left apex and superior mediastinum . Additionally , marked rotation of the patient also accentuate mediastinal structures . Widening of upper mediastinum appears to be due to mediastinal lipomatosis as evident on CT torso of ___ . Heart size is normal , and pulmonary vascularity is normal . Lungs are clear except for linear opacities at the lung bases , which may reflect atelectasis and / or scarring .
    OUTPUT:
    
Technically limited chest radiograph demonstrating no gross evidence of abnormality , but repeat radiograph with improved positioning would be helpful to more fully evaluate the mediastinum and left lung apex when the patient 's condition permits .