In general, agree with dr. Arenberg's answer/description of procedure.
But, the specifics for you depend on why you are having a biopsy
. If it is for an isolated area, it may be a single piece of lung tissue. Biopsy for generalized lung disease diagnosis may require between 3-4 pieces of lung tissue being excised. Well trained thoracic surgeon will perform over 85% of lung biopsies by vats.