Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient 's overlying chin obscures the left lung apex in the medial right lung apex . The patient arm / hand partially obscures the left hemidiaphragm . Given the above , the cardiac and mediastinal silhouettes are grossly stable . Aortic knob calcification is seen . There is no focal consolidation , pleural effusion , or evidence of pneumothorax . No pulmonary edema is seen .
    OUTPUT:
    
Suboptimal study due to the patient 's overlying chin obscuring the left lung apex and medial right lung apex as well the patient 's overlying upper extremity obscuring the left hemidiaphragm . Given this , no definite acute cardiopulmonary process seen .