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Use of Non-invasive Optical Analysis in Neurosurgery

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04712214
Recruitment Status : Recruiting
First Posted : January 15, 2021
Last Update Posted : August 26, 2021
Information provided by (Responsible Party):
Imperial College London

Brief Summary:
The present study aims to investigate the potential application of multispectral analysis, hyperspectral imaging, and fluorescence during neuro-oncological procedures, specifically during brain tumour debulking / resection. These optics techniques are entirely non-invasive and consist in camera with a filter to be linked to the standard microsurgical and endoscopic instruments used in theatre. The research procedure consists of images acquisition and data processing, with virtually no additional invasive procedures to be performed on patients.

Condition or disease Intervention/treatment Phase
Brain Tumour Glioma Meningioma Brain Metastases Schwannoma Device: Intra-operative multispectral / hyperspectral analysis Not Applicable

Detailed Description:

Surgical resection of brain tumours remains a challenge. While the center of a tumour is easily resectable, its margins are often fading into normal brain, and therefore quite difficult to identify. Moreover, there is now extensive literature proving that tumour cells extend way beyond visible margins of a tumour, following white matter tracts in the brain. As opposite to different organs (such as liver or kidney), resection of brain tumours beyond the visible margins is limited by the presence of eloquent/functional areas. Damages or resection of these areas will inevitably cause a permanent disability, which can be incredibly serious and impact on further treatment: a paralyzed or unconscious patient is not capable of tolerating chemotherapy or radiotherapy after surgery, both crucial complementary forms of treatment to contain the disease, in combination with surgery.

Because of these premises, the concept of "functional margins of resection" is now established in the neurosurgical community: a tumour is resected and the resection is pushed up to 1-2 cms beyond the margins or only up to the point where a functional/eloquent area is found. If the latter is the case, the functional area is obviously preserved and tumour resection is stopped. Identifying these areas is the main challenge in brain tumour surgery.

The aim of this study and its scientific justification is to refine a new, potentially more practical and quick technique to identify functional brain areas in real time. This study can serve as a benchmark study to both improve surgery of brain tumours and increase our knowledge about brain tumours and eloquent brain vascular supply. This technique can also potentially be implemented to obtain a novel technology to assess brain perfusion during neurosurgical procedures. Maintaining blood supply to healthy brain tissue is a key component of successful neuro-oncological surgery. Multispectral/hyperspectral analysis can be evaluated as a complementary tool to assess brain perfusion in real-time and prevent post-operative devastating neurological complications, such as strokes, or significantly reduce the secondary damage would these complications occurr.

The present project consists of a pilot observational study on patients diagnosed with brain tumours candidate for a neurosurgical operation.

From a practical point of view, participation in the study will only imply that some images will be acquired during surgery and processed at a later stage. The study won't impact on patients' care at any stage, nor will produce results that will be relevant for future medical records of patients enrolled. Patients will be approached about this study at the time of their first neuro-oncology clinic consultation. A member of the research team will be present at the time of the consultation and will explain in details what are the purposes and the methods of the present study.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 50 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Other
Official Title: Use of Non-invasive Optical Analysis in Neurosurgery - A Pilot Study
Actual Study Start Date : March 28, 2021
Estimated Primary Completion Date : November 1, 2022
Estimated Study Completion Date : February 1, 2023

Arm Intervention/treatment
Experimental: Patients with brain tumours candidate for neurosurgery
Patients will be recruited following the inclusion criteria: any patient with a diagnosis of brain tumour, age ranging from 18 with no upper limit, who will agree to the operation and to take part of the present study, will be enrolled. During surgery, multispectral and/or hyper spectral acquisition of images from the surgical field will be performed. Each patient will have an average acquisition of 6 datasets. As each dataset will correspond to an image, this will be divided into many reading regions (from 10 to 20) for a total of approximatively 60 measurements per patient.
Device: Intra-operative multispectral / hyperspectral analysis
During surgery, the operating surgeon will be using standard NHS neurosurgical equipment such as an endoscope and/or a microscope. This equipment is operated in exactly the same way as with any other procedure, but either the microscope or the endoscope in use will be connected to the system of camera and filters for multispectral/hyperspectral analysis. During each surgical intervention, tissue-specific spectral data will be collected at specific stages - mostly once the brain surface is exposed and at the end of the resection on the surgical cavity. The operation will be visually recorded in order to sync visual data with the spectral data obtained at the same moment in time. The video recording will not be patient identifiable and will be viewed only by members of the research team working on this project (see below). The use of video recording equipment will be included in the patient information sheet given to all patients prior to gaining consent

Primary Outcome Measures :
  1. Analysis of spectroscopic signal reading between brain tissue and brain tumour [ Time Frame: 3 years ]
    Brain tissue and tumour tissue, the signals collected will be correlated both to the visual signal seen on normal operative field, a pre-set of brain images, and the signal seen on the peri-operative imaging (MRI scan).

  2. Analysis of spectroscopic signal reading between functional brain areas and non functional brain areas [ Time Frame: 3 years ]
    The signal collected will be correlated with the neuro-physiological intra-operative findings, in every case there is an indication to do so, and with the expected location of the eloquent areas on the peri-operative images.

Secondary Outcome Measures :
  1. Analysis of spectroscopic signal reading of surgical field as seen at its baseline and under fluorescence-specific light [ Time Frame: 3 years ]
    Comparison will be made between multispectral / hyper spectral acquired images, and the same images acquired with the addition of fluorescence light

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Candidates for surgery due to a confirmed clinical and radiological diagnosis of cranial intrinsic or extrinsic tumour - any histological diagnosis confirming neuro-oncological disease, including primary and secondary disease
  • Agreed to take part to the present research protocol and signed proper informed consent form

Exclusion Criteria:

  • Suspected differential diagnosis of pathological condition affecting central nervous system other than neuro-oncological disease - including demyelinating diseases, infections, brain traumas / haematomas, vascular or auto-immune diseases
  • Patients not capable to give consent - not in condition of understanding, processing and retaining information

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04712214

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Contact: Giulio Anichini, MD, FEBNS 00447460946298

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United Kingdom
Imperial College NHS Trust, Charing Cross Hospital Recruiting
London, England, United Kingdom, W68RF
Contact: Giulio Anichini    00447460946298   
Contact: Kevin O'Neill    02033117489   
Sponsors and Collaborators
Imperial College London
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Study Chair: Kevin O'Neill, MD, FRCS Imperial College of London, Charing Cross Hospital
  Study Documents (Full-Text)

Documents provided by Imperial College London:
Informed Consent Form  [PDF] December 30, 2019

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Responsible Party: Imperial College London Identifier: NCT04712214    
Other Study ID Numbers: 258210
First Posted: January 15, 2021    Key Record Dates
Last Update Posted: August 26, 2021
Last Verified: August 2021
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Imperial College London:
multispectral analysis
hyperspectral analysis
brain tumours
Additional relevant MeSH terms:
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Brain Neoplasms
Neoplasms, Neuroepithelial
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Neoplasms by Histologic Type
Neoplasms, Glandular and Epithelial
Neoplasms, Nerve Tissue
Central Nervous System Neoplasms
Nervous System Neoplasms
Neoplasms by Site
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neoplasms, Vascular Tissue
Meningeal Neoplasms
Neuroendocrine Tumors
Nerve Sheath Neoplasms