Vibration Response Imaging (VRI) in Lung Cancer Patients
- To estimate the accuracy of the pre-operative VRI QRF (Quantitative Regional Function) results versus the gold standard QRRVP (Quantitative Radionuclide Study of Regional Lung Ventilation and Perfusion) pre-operative scan.
- To assess the correlation of the predicted post-operative lung function with the observed post-operative lung function (FEV1 and DLCO) in patients who underwent surgical resection. (FEV1 = Forced expiratory volume in 1-second. DLCO = Diffusion capacity for carbon monoxide. ppo = predicted postoperative.)
|Study Design:||Observational Model: Case-Only
Time Perspective: Prospective
|Official Title:||Vibration Response Imaging (VRI) in Patients Who Are Candidates for Undergoing Surgical Resection Due to Lung Cancer or Other Intrathoracic Malignancy|
- To learn the level of accuracy of pre-surgery results from the Vibration Response Imaging (VRI) system compared with the results from the standard pre-surgery lung function test that is performed on patients with lung cancer or cancer in the chest. [ Time Frame: 4 Years ]
- To learn the level of accuracy of the VRI system in predicting how the lungs will function after surgery. [ Time Frame: 4 Years ]
|Study Start Date:||November 2006|
|Study Completion Date:||August 2009|
|Primary Completion Date:||August 2009 (Final data collection date for primary outcome measure)|
Vibration Response Imaging (VRI) System
Procedure: Vibration Response Imaging
Lung function test performed using the VRI system immediately before or after the standard lung function test.
The current standard lung function test uses radioisotopes (materials that produce radiation) injected in a vein and breathed into the lungs, which can show images of the function of the lungs.
The VRI system uses pressure sensors that act like electronic stethoscopes (tools used by doctors to listen to the heart and other sounds in the body). These sensors can record the energy (vibrations) created by the airflow in the lungs during the breathing process, which can then be visually imaged.
Before you can start this study, there will be a screening evaluation. The study doctor will review your medical record to find out if you are eligible to take part in this study. Information that will be viewed will include whether you have a skin lesion that might interfere with sensor placement, whether you have a cardiac pacemaker, and/or pregnancy test results. The study doctor will review with you the other types of information that will be viewed from your medical record to find out if you are eligible to take part in this study. For women who are able to have children, if you do not have a negative pregnancy test result in your medical record, you will not be able to take part in this study.
If you are found to be eligible and you agree to take part in this study, you will have a lung function test with the VRI system immediately before or after the standard lung function test. To perform the VRI test, you will be asked to remove your shirt and put on a garment to cover the front of your body. You will also be asked to remove your jewelry and other body accessories. You will then be asked to sit on a backless chair, and you will be instructed how to sit with the proper posture and breathe correctly for this test.
Before recording starts, the sensors will be cleaned and then placed on your back. You will be instructed to breathe deeply for up to 12 seconds (about 2-3 times), and the vibration responses will be recorded. You will have a total of 3 recording sessions, one after the other. Once all the recording is done, the sensors will be removed. The VRI image of the vibrations will then be examined by the operator in order to check the quality of the image.
The signals recorded from the sensors will be transferred to a computer so that researchers can study the images. The results of the recordings will be compared with the standard lung function test results. This will help researchers learn the level of accuracy of the VRI system in predicting how the lungs will function after surgery.
You will not be told of the results from the VRI testing because the results will not be used to diagnose your medical condition, nor will any medical decisions be made based on the VRI results. The VRI system is only used for investigational purposes in this study and will not replace the current diagnostic methods.
If you undergo surgery, as part of your standard care, you will also return to the clinic for standard tests to check your lung function 4-12 weeks and 4-12 months after your surgery. Researchers will compare your pre-surgery test results (both the standard test results and the VRI results) with the results of the tests after surgery (standard tests) to learn the level of accuracy of the VRI system in predicting how the lungs will function after surgery.
This is an investigational study. The VRI system is not FDA approved or commercially available for use in the United States. All will be enrolled at M. D. Anderson.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00506467
|United States, Texas|
|U.T.M.D. Anderson Cancer Center|
|Houston, Texas, United States, 77030|
|Principal Investigator:||Rodolfo C. Morice, MD||M.D. Anderson Cancer Center|