Diagnostic of Lewy Body Dementia by Combining Scintigraphy (SPECT) Using a Specific Transporter and Magnetic Resonance Imaging (MRI) (DatScan)

July 28, 2025 updated by: University Hospital, Limoges

Interest of the Combination of the DaTSCAN Scintigraphy and MRI Scan in the Differential Diagnosis of Lewy Body Dementia From Alzheimer Disease in Patients With Hallucinations

The aim of this study is to improve the diagnostic of Lewy body dementia by combining the scintigraphy (SPECT) usig a spécific transporter and magnetic resonance imaging (MRI).

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Lewy body dementia is the second leading cause of dementia in France after degenerative Alzheimer's disease.

However its dignosis is difficult. Its comes in large part from the similarity of symptoms with another close dementia syndrome : the Alzheimer disease . Therfore, its is very important to have a mean to distinguish between the two dementias.

One highlight of the Lewy body dementia process being dopaminergic degeneration, the use of specific radioactive tracers is thought to be the way. The radiotracer that has the greatest advantage for these explorations is currently the DaTSCAN because it binds specifically on the dopamine transporter and can be used in Single photon emission computed tomography (SPECT).

The aim of this study is to improve the performance of imaging in the diagnosis of dementia by combining scintigraphy (SPECT) and magnetic resonance imaging (MRI) in the exploration of the striatal region . The development of this method applied to a population of subjects, with hallucinations and cognitive disorders, should demonstrate the value and complementarity of metabolic images (SPECT) and morphological (MRI) within the differential diagnosis of Lewy body dementia and the Alzheimer disease .

From a methodological point of view, the patient will be included in hospital and will have a clinical diagnosis defined according to the criteria of dementia NINCDS-ADRDA for the Alzheimer disease and Mc-Keith criteria for Lewy body dementia. Their MMSE will be over 18 and they have in common recurrent visual hallucinations.

After the inclusion, two steps must be distinguished, a neuropsychological evaluation stage and an scitigraphy exploration . Before the SPECT , all patients should have an MRI.

Study Type

Interventional

Enrollment (Actual)

20

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Limoges, France, 87000
        • Département de Gérontologie - Chu Limoges
      • Limoges, France, 87000
        • Pôle de psychiatrie du sujet âgé - CH Esquirol
      • Limoges, France, 87000
        • Service de Neurologie - CHU de Limoges

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

65 years to 90 years (Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients with alzheimer disease following NINCDS-ADRDA scale or Lewy body dementia following Mc Keith scale.
  • Aged between 65 et 90 years
  • Patients with visual hallucination
  • Patients with helping people
  • Patients with MMSE (Mini Mental State Examination) equal or more than 18.
  • Signed consent

Exclusion Criteria:

  • Hospitalized patients without their consent
  • Patients who have not passed the neuropsychological tests
  • Patients with a MMSE less than 18
  • Patients without helping
  • Patients with no visual hallucinations
  • Patients with severe somatic pathology.
  • Pregnancy
  • Allergy to iodine

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
SPECT and MRI differential imaging
Time Frame: Visit 1
Visit 1

Secondary Outcome Measures

Outcome Measure
Time Frame
Neuropsychological analysis
Time Frame: Visit 1
Visit 1

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Hospital, Limoges

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

  • Comparison of DAT-scan evaluation for the aetiological diagnosis of hallucinations in the elderly P. Thomas a,∗,d, A. Prado-Jeana,b, J.-P. Clément a,d, P. Couratier a,b, J. Monteil c NPG Neurologie - Psychiatrie - Gériatrie Volume 13, Issue 75, June 2013, Pages 145-151

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2006

Primary Completion (Actual)

March 1, 2008

Study Completion (Actual)

March 1, 2008

Study Registration Dates

First Submitted

December 27, 2008

First Submitted That Met QC Criteria

January 9, 2009

First Posted (Estimated)

January 12, 2009

Study Record Updates

Last Update Posted (Actual)

July 30, 2025

Last Update Submitted That Met QC Criteria

July 28, 2025

Last Verified

August 1, 2009

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • I04014

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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