Monitoring Neural Tissues Properties by Modulated Imaging (MI)

Withdrawn

• Conditions: Brain Tumor
• Interventions: Device: Modulated Imaging

• Registration Number: NCT00555711
• Lead Sponsor: University of California, Irvine

Brief Summary

We have developed a safe, non-contact, intra-operative guidance system to optimize tumor resection in neurosurgery. The Modulated Imaging 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.

Detailed Description

While compatible with time-modulation methods, MI alternatively uses spatially-modulated illumination for imaging of tissue constituents.

The Modulated Imaging system consists of

1. a light projection system that illuminates the tissue with spatial sinusoid patterns.

2. 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 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.

Study Timeline

• Study First Submitted: 2007-11-07
• Study First Submitted QC: 2007-11-07
• Study First Posted: 2007-11-09
• Study Start: 2008-11
• Primary Completion: 2012-01
• Study Completion: 2012-01
• Status Verified: 2022-10
• Last Update Submitted: 2022-10-19
• Last Update Posted: 2022-10-20

Recruitment & Eligibility

• Status: WITHDRAWN
• Sex: All
• Target Recruitment: Not specified

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.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Modulated Imaging	Modulated Imaging	Modulated Imaging

Primary Outcome Measures

Name	Time	Method
Brain Tissue Property	12 weeks

Trial Locations

Locations (2)

Neurosurgery department,University of California,Irvine; 🇺🇸 Orange, California, United States

Beckman Laser Institute,University of California,Irvine; 🇺🇸 Irvine, California, United States