"Small lung nodules are much more difficult to successfully locate and remove than larger nodules," said the study's lead author, John Mayo, M.D., professor of radiology and cardiology at the University of British Columbia in Vancouver. "Using CT guidance, we can accurately place the microcoils at the precise location of the small nodules and guide video-assisted thoracoscopic surgery (VATS) removal."
A lung nodule is a relatively round lesion, or area of abnormal tissue located within the lung. Lung nodules do not typically cause pain or other symptoms and are most often detected by imaging exams. However, it is not always possible to tell from imaging tests whether a nodule is benign or cancerous.
"When a patient has a very small nodule identified, we can use the microcoil technique to definitively discover whether or not the nodule is malignant and remove the entire nodule in one procedure," Dr. Mayo said.
VATS is a minimally invasive technique in which one or more small incisions are made in the patient's chest and a small fiber optic camera and surgical instruments are inserted through the incisions. Images transmitted by the camera guide the physician through the procedure.
VATS can replace a traditional thoracotomy, a surgical procedure that uses one larger incision to gain access to the chest. VATS typically results in less pain and faster recovery time for the patient compared to open surgery.
Because small, peripheral lung nodules can be difficult to locate, physicians often have to resort to the more invasive thoracotomy procedure, removing larger amounts of lung tissue to successfully locate small nodules.
For the study, Dr. Mayo and colleagues used CT-guided microcoil placement to assist in VATS removal of 75 small, peripheral lung nodules in 69 patients ranging in age from 31 to 81 years. Four patients had two nodules treated, and two of the patients had second nodules removed at a later date. In all, 75 procedures were performed. The microcoil technique allowed the researchers to locate 100 percent of small nodules, and 97 percent of the lung nodules were successfully and completely removed with VATS.
The results show that with precise microcoil localization, even small nodules can be removed with VATS.
"The real beauty of this procedure is that we are able to remove the entire nodule and very little surrounding tissue, so there is no decrease in lung function," Dr. Mayo said. "Recovery time is significantly reduced in these patients as a result. Instead of the three- to six-week recovery period that follows a thoracotomy, these patients can return to work within two to three days."
"Lung Nodules: CT-guided Placement of Microcoils to Direct Video-assisted Thoracoscopic Surgical Resection." Collaborating with Dr. Mayo were Joanne C. Clifton, M.Sc., Tom I. Powell, M.D., John C. English, M.D., Ken G. Evans, M.D., John Yee, M.D., Annette M. McWilliams, M.D., Stephen C. Lam, M.D., and Richard J. Finley, M.D. Journal attribution requested.
Radiology is edited by Herbert Y. Kressel, M.D., Harvard Medical School, Boston, Mass., and owned and published by the Radiological Society of North America, Inc. (RSNA.org/radiologyjnl)
RSNA is an association of more than 42,000 radiologists, radiation oncologists, medical physicists and related scientists committed to excellence in patient care through education and research. (RSNA.org)
For patient-friendly information on CT, visit RadiologyInfo.org
A first look at interstitial fluid flow in the brain
05.07.2018 | American Institute of Physics
A sentinel to watch over ocular pressure
04.07.2018 | Fraunhofer Institute for Microelectronic Circuits and Systems
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences