Placement of 125I implants with the da Vinci robotic system after video-assisted thoracoscopic wedge resection: a feasibility study.
OBJECTIVE
To evaluate the feasibility of using the da Vinci robotic system for radioactive seed placement in the wedge resection margin of pigs' lungs.


METHODS
Video-assisted thoracoscopic wedge resection was performed in the upper and lower lobes in pigs. Dummy (125)I seeds embedded in absorbable sutures were sewn into the resection margin with the aid of the da Vinci robotic system without complications. In the "loop technique," the seeds were placed in a cylindrical pattern; in the "longitudinal," they were above and lateral to the resection margin. Orthogonal radiographs were taken in the operating room. For dose calculation, Variseed 66.7 (Build 11312) software was used.


RESULTS
With looping seed placement, in the coronal view, the dose at 1 cm from the source was 97.0 Gy; in the lateral view it was 107.3 Gy. For longitudinal seed placement, the numbers were 89.5 Gy and 70.0 Gy, respectively.


CONCLUSIONS
Robotic technology allows direct placement of radioactive seeds into the resection margin by endoscopic surgery. It overcomes the technical difficulties of manipulating in the narrow chest cavity. With the advent of robotic technology, new options in the treatment of lung cancer, as well as other malignant tumors, will become available.
Pisch
Julianna
J
Department of Radiation Oncology and Physics, Beth Israel and St. Luke's-Roosevelt Medical Center, 1st Avenue and 16th Street, New York, NY 10003, USA. jpisch@bethisraelny.org
Belsley
Scott J
SJ
Ashton
Robert
R
Wang
Lin
L
Woode
Rudolph
R
Connery
Cliff
C
D000818:Animals; D001918:Brachytherapy / Q000379:methods*; D005240:Feasibility Studies; D007457:Iodine Radioisotopes / Q000008:administration & dosage*; D008168:Lung; D008175:Lung Neoplasms / Q000532:radiotherapy; D012371:Robotics / Q000379:methods*; D013552:Swine; D020775:Thoracic Surgery, Video-Assisted
D007457:Iodine Radioisotopes