Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Flexed position of the patient 's neck results in obscuration of the extreme lung apices and superior mediastinum . With this limitation in mind , cardiomediastinal contours are within normal limits , and imaged portions of the lungs are clear . No pleural effusion . Note that portions of the chest better obscured have been more fully evaluated by a recent CT of ___
    OUTPUT:
    
No acute cardiopulmonary abnormality .