Monitoring Neural Tissues Properties by Modulated Imaging (MI)
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Purpose
We have developed a safe, non-contact, intra-operative guidance system to optimize tumor resection in neurosurgery. The Modulated Imaging (MI) is non-contact optical imaging technology developed at the Beckman Laser Institute, UCI.
Compared to other imaging approaches, MI has the unique capability of performing both diffuse optical tomography and rapid, wide-field quantitative mapping of tissue optical properties within a single measurement platform.
Preliminary in vivo studies have shown that brain tumors, infiltrating tumor margins and normal brain may have intrinsically different optical properties.
| Condition |
|---|
|
Brain Tumor |
| Study Type: | Observational |
| Study Design: | Observational Model: Case-Only Time Perspective: Cross-Sectional |
| Official Title: | Monitoring Neural Tissues Properties by Modulated Imaging (MI) |
| Enrollment: | 0 |
| Study Start Date: | November 2008 |
| Estimated Study Completion Date: | January 2012 |
| Estimated Primary Completion Date: | January 2012 (Final data collection date for primary outcome measure) |
While compatible with time-modulation methods, MI alternatively uses spatially-modulated illumination for imaging of tissue constituents.
The MI system consists of
- a light projection system that illuminates the tissue with spatial sinusoid patterns.
- a CCD camera which collects the diffusely reflected light in a non-contact geometry. The wavelength of illumination can be selected by bandpass filtering of a broadband source,or by use of a monochromatic source.
Lastly, tissue fluorescence measurements can be performed by placing a combination of source-blocking and bandpass emission filters in front of the camera.
The diffusely reflected amplitude of the modulated wave carries both optical property (absorption, fluorescence, scattering) and depth information. Specifically, the sampling depth of the spatially-modulated wave is a function of the frequency of illumination and the tissue optical properties.
During neurosurgery when nervous tissue is exposed by the attending neurosurgeon, intraoperative pictures will be taken using the modulated imager (MI) by the investigators.
The imaging procedure may delay completion of the surgical case by an estimated 10 to 20 minutes. This is minimal prolongation considering most brain tumor resections take several hours.
The images acquired will be processed after the surgical procedure and will not be available to the surgeon during the operative procedure.
Eligibility| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | No |
| Sampling Method: | Non-Probability Sample |
primary care clinic
Inclusion Criteria:
- All nervous system tumor patients who undergo a preoperative MRI,and undergoing central nervous system operative procedures for non tumor.
Exclusion Criteria:
- All emergency neurosurgical procedures.
Contacts and Locations| United States, California | |
| Beckman Laser Institute,University of California,Irvine | |
| Irvine, California, United States, 92612 | |
| Neurosurgery department,University of California,Irvine | |
| Orange, California, United States, 92868 | |
| Principal Investigator: | Mark Linskey, MD | Neurosurgery department,University of California,Irvine |
| Principal Investigator: | Bruce J Tromberg, PhD | Beckman Laser Institute University of California Irvine |
More Information
No publications provided
| Responsible Party: | Montana Compton, Administrative Nurse Research Coordinator Beckman Laser Institute, University of California, Irvine |
| ClinicalTrials.gov Identifier: | NCT00555711 History of Changes |
| Other Study ID Numbers: | LAMMP WIFI RR-01192-29 |
| Study First Received: | November 7, 2007 |
| Last Updated: | October 28, 2011 |
| Health Authority: | United States: Institutional Review Board |
Keywords provided by University of California, Irvine:
|
Brain tumor |
Additional relevant MeSH terms:
|
Brain Neoplasms Central Nervous System Neoplasms Nervous System Neoplasms Neoplasms by Site |
Neoplasms Brain Diseases Central Nervous System Diseases Nervous System Diseases |
ClinicalTrials.gov processed this record on May 22, 2013