CAA: Application of Amyloid PET in Cerebral Amyloid Angiopathy

Sponsor

National Taiwan University Hospital (Other)

Overall Status

Completed

CT.gov ID

NCT03542656

Collaborator

(none)

160

Enrollment

Location

Arm

42.3

Actual Duration (Months)

3.8

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

In this project, we will try to enhance the diagnostic potentials of amyloid PET in CAA by combination of dynamic amyloid PET with MRI SWI and MR perfusion images. We will also try to investigate the roles of CAA in patients with drug-related ICH and validate the accuracy of clinical CAA diagnostic criteria. In addition, we will try to study the characteristics of long-term progression of amyloid deposition in CAA patients. This project will enroll 100 patients with ICH, 30 patients with AD, and 30 control subjects. Each patient will receive the above image studies, followed by data analysis and comparison.

Condition or Disease	Intervention/Treatment	Phase
Cerebral Amyloid Angiopathy Intracranial Hemorrhages Alzheimer Disease	Drug: amyloid PET	Phase 3

Detailed Description

Intracranial hemorrhage (ICH) consists of about a quarter of stroke subtype. For elderly, cerebral amyloid angiopathy (CAA) is a common etiology of ICH. In patients with CAA, abnormal beta amyloid protein diffusely deposits at cerebral vasculatures, which disrupts the normal vessel structure and increases the risk of bleeding. The standard diagnosis for CAA requires pathological evidences of amyloid deposition at cerebral arteries. Clinically, a diagnosis of CAA-related ICH is usually only made in an elderly developing cortical or subcortical lobar ICH without undergoing biopsy. Brain images using the SWI sequence of MRI study may show several lobar microbleeds in patients with CAA. However, there is still no direct and precise non-invasive diagnostic tool for CAA until now.

Amyloid PET, using 11C-PiB to image amyloid burden, has been used for detecting the cerebral amyloid protein deposition in patients with Alzheimer's dementia (AD) for years. Recently, amyloid PET has also been applied in diagnosis of CAA. CAA patients showed diffusely increased global PiB retention as compared to control subjects and the distribution of PiB retention is also different from that seen in patients with AD in general. Nevertheless, the applications of amyloid PET in CAA diagnosis are still not well established and many important issues still need to be extensively addressed. For example, amyloid PET sometimes is not able to exactly distinguish CAA patients from control and AD subjects. The roles of CAA in patients with drug-related ICH are still unclear. The accuracy of CAA diagnosis using clinical criteria still needs further validation. In addition, the characteristics for long-term progression of amyloid deposition are still unknown in CAA patients.

Study Design

Study Type:

Interventional

Actual Enrollment :

160 participants

Allocation:

N/A

Intervention Model:

Single Group Assignment

Masking:

None (Open Label)

Primary Purpose:

Diagnostic

Official Title:

Application of Amyloid PET in Cerebral Amyloid Angiopathy

Actual Study Start Date :

Sep 11, 2014

Actual Primary Completion Date :

Feb 17, 2016

Actual Study Completion Date :

Mar 22, 2018

Arms and Interventions

Arm	Intervention/Treatment
Experimental: amyloid PET PET/CT	Drug: amyloid PET Dynamic PET acquisition for 60 minutes will be acquired after injection of 10 mCi 11C-PiB (39 frames: 8 x 15 seconds, 4 x 60 seconds, 27 x120 seconds).

Arm

Intervention/Treatment

Experimental: amyloid PET

PET/CT

Drug: amyloid PET

Dynamic PET acquisition for 60 minutes will be acquired after injection of 10 mCi 11C-PiB (39 frames: 8 x 15 seconds, 4 x 60 seconds, 27 x120 seconds).

Outcome Measures

Primary Outcome Measures

PET imaging [in 3 days]
PET data will reconstruct with ordered set expectation maximization, corrected for attenuation, and each frame will be evaluated to verify adequate count statistics and absence of head motion.

Eligibility Criteria

Criteria

Ages Eligible for Study:

20 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

Age：above 20 years old with ICH or AD, or control subjects.
Patient agrees to participate in the study and receive cerebral amyloid PET and MRI SWI and perfusion studies.

Exclusion Criteria:

Patients could not receive the PET and MRI studies, including but not limited to poor cooperative agitation impeding adequate study, allergy to contrast medium, hemodynamic instability, implantation of cardiac pacemaker, past history of receiving aneurysm clipping, panic mood to MRI study.
Patients with pregnancy or recently having a plan for pregnancy.
Patient or family who does not agree to participate in the study.