1. Intraoperative ultrasound during thoracoscopic procedures for solitary pulmonary nodules 
Roberto Santambrogio, MD, Marco Montorsi, MD, Paolo Bianchi, MD, Angelo Mantovani, MD, Filippo Ghelma, MD, Maurizio Mezzetti, MD 
The Annals of Thoracic Surgery 
Volume 68, Issue 1, Pages (July 1999)
DOI: /S (99)

2. Fig 1 Intraoperative ultrasound probe with a linear head of 7.5 MHz.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2
Intraoperative view using thoracoscope shows ultrasound probe over area of suspected pulmonary nodule.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

4. Fig 3
Intraoperative ultrasound shows hypoechoic lesion (arrow). Because of the collapse of the lung during thoracoscopy, the nodule is seen close to the pleural surface.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

5. Fig 4
Intraoperative ultrasound shows heterogeneous pulmonary nodule (arrow).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

6. Fig 5
Intraoperative ultrasound clearly shows enlarged lymph nodes (arrows).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )