 So we use a technology called navigational bronchoscopy and specifically we use robotic navigational bronchoscopies and it's a means of integrating the patient's imaging, the CAT scan, with what we do in the operating room. It helps us in the operating room find abnormalities, biopsy abnormalities. Sometimes we use them to ink the abnormality so we find them at the time of surgery. So it's a very effective way of minimizing what we do in the operating room also if we need to get biopsies to do it in a less invasive way than what is commonly done. So one of the major components of our operative approach is to try to spare as much lung capacity as we can while still maintaining a good operation for the cancer that the patient has. So a segmentectomy which is a lesser operation than what's usually done which is called a lobectomy typically can spare up to 40 to 50 percent more lung capacity than lobectomies which are what most surgeons tend to do. It's as good a cancer operation yet it spares lung capacity. So the problem with removing lung capacity in patients with lung cancer is frequently those patients are smokers and so they have somewhat diminished lung capacity so to try to maintain a better quality of life the more lung we can spare the better it is for them.