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Trial registered on ANZCTR
Registration number
ACTRN12612000476831
Ethics application status
Approved
Date submitted
24/02/2012
Date registered
1/05/2012
Date last updated
1/05/2012
Type of registration
Retrospectively registered
Titles & IDs
Public title
Magnetic resonance imaging of the vision centre of the brain in visually impaired versus normally sighted participants
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Scientific title
3-Tesla MRI volumetric and diffusion tensor analyses of the primary visual cortex: A case-control study in visually impaired and normally sighted subjects
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Secondary ID [1]
280027
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Nil
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Severe visual impairment
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Condition category
Condition code
Eye
286128
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0
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Diseases / disorders of the eye
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Detailed anatomical mapping of the primary cortex using high resolution magnetic resonance imaging in patients with severe visual impairment compared with normally sighted volunteers. Consists of a single brain MRI of the occipital lobe of 60 minutes' duration.
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Intervention code [1]
284347
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Early detection / Screening
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Intervention code [2]
284779
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Other interventions
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Comparator / control treatment
Active control: comparison with the primary visual cortex in participants with normal vision
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Control group
Active
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Outcomes
Primary outcome [1]
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Provision of a set of algorithmic criteria delineating primary visual cortex structural differences between subjects with visual impairment and those with normal vision.
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Assessment method [1]
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Timepoint [1]
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On completion of the MRI scan
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Secondary outcome [1]
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Nil
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Assessment method [1]
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Timepoint [1]
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Nil
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Eligibility
Key inclusion criteria
Cases: untreatable bilateral visual impairment due to retinitis pigmentosa, diabetic retinopathy, glaucoma or macular degeneration or with acquired retinal, optic nerve or ocular surface disease. Visual acuity of less than or equal to Snellen’s Test Type 6/60 for > 12 months. History of normal vision in adulthood.
Controls: visual acuity of greater than or equal to Snellen’s Test Type 6/12.
Intact visual cortex
Age greater than or equal to 18 years
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
History of traumatic occipital cortex injury
Cognitive or intellectual disability, or dementia
Pre-existing active psychiatric conditions including psychosis, bipolar disorder and schizophrenia
Claustrophobia
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Study design
Purpose of the study
Diagnosis
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Allocation to intervention
Non-randomised trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Allocation is not concealed
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Not applicable
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Masking / blinding
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Who is / are masked / blinded?
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Intervention assignment
Other
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Other design features
Two groups, those severely visually impaired, and those will normal vision, receive the same intervention
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Phase
Not Applicable
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
28/03/2011
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Actual
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
40
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Funding & Sponsors
Funding source category [1]
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Government body
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Name [1]
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Australian Research Council
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Address [1]
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Level 2, 11 Lancaster Place
Majura Park, ACT, 2609
AUSTRALIA
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Country [1]
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Australia
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Primary sponsor type
University
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Name
Monash University
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Address
Wellington Road,
Clayton, Victoria, 3800
AUSTRALIA
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Country
Australia
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Secondary sponsor category [1]
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Hospital
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Name [1]
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The Alfred
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Address [1]
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Commercial Road,
Melbourne, Victoria, 3004
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Country [1]
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Australia
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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The Alfred Human Research and Ethics Committee
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Ethics committee address [1]
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Commercial Road,
Melbourne, Victoria, 3004
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Ethics committee country [1]
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Australia
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Date submitted for ethics approval [1]
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12/02/2011
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Approval date [1]
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01/03/2011
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Ethics approval number [1]
286778
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44/11
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Summary
Brief summary
We hypothesise that the structure of the primary visual cortex in severely visually impaired participants will differ from that in participants with normal vision. Our aim is to develop a method of identifying the primary visual cortex during exposure of the occipital lobe of the brain during neurosurgery.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Address
33833
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Ms Helen Ackland
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Address
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The Alfred Hospital,
Commercial Road,
Prahran, Victoria, 3004
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Country
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Australia
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Phone
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61 3 9076 2000
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Ms Helen Ackland
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Address
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The Alfred Hospital,
Commercial Road,
Prahran, Victoria, 3004
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Country
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Australia
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Phone
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61 3 9076 2000
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Fax
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Email
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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