The ABIDE-PET study.

SUMMARY

Rationale

In a former study, we studied diagnostic impact of [11C]PIB-PET in a large group of memory clinic patients. We found that amyloid-PET has a large impact on diagnosis and the clinicians’ confidence in the diagnosis.[1] [11C]PIB-PET can only be used where an on-site cyclotron is available for production, hampering its widespread implementation. With the development of [18F]-tracers, which do not require on-site production and are therefore more suitable to be used by local memory clinics, the question of the diagnostic value in an unselected patient sample becomes more urgent. In the former study, [11C]PIB-PET was performed in a selected sample. In the current project, we aim to take the next step by studying the diagnostic value of an F18 tracer, [18F]Florbetaben ([18F]FBB), in a large and unselected memory clinic sample.

We therefore aim to assess the added clinical value of amyloid-PET scan in a large and unselected population of patients visiting our memory clinic.


Primary objective

To investigate in an unselected memory clinic sample, the clinical value of 18F]FBB PET in terms of

1. change in diagnosis;

2. change in level of confidence of diagnosis;

3. impact on patient healthcare management.


Study design: Prospective and longitudinal, observational study.


Study population: Unselected patient population of n=500 subjects visiting the memory clinic of the
VUmc Alzheimer center.


Intervention (if applicable): [18F]FBB PET scan.


Main study parameters/endpoints:

The main outcome measure is the clinical value of [18F]FBB PET, which will be operationalized as follows; (i), the change in diagnosis, (ii) change in the level of confidence in the diagnosis, (iii) .the impact on future patient management as measured using additional ancillary investigations, prescription of medication and use of health care.
Nature and extent of the burden and risks associated with participation, benefit and group relatedness:
Risks associated with participation in this study are related to 1) radiation exposure; 2) idiosyncratic reaction to the tracer; 3) placement of intravenous catheter; 4) discomfort during scanning.

To investigate in an unselected memory clinic sample, the clinical value of 18F]FBB PET in terms of

1. change in diagnosis;

2. change in level of confidence of diagnosis;

3. impact on patient healthcare management.

N.a.

Florbetaben PET-scan.