Optimized C-arm Cone Beam CT for the Endovascular Treatment (EVT) of Acute Stroke (ASO-AVC)

Assistance Publique - Hôpitaux de Paris

Status: Completed

Conditions: Stroke, Acute

Treatments: Other: Diagnostic Test: optimized C-Arm Cone Beam Computed Tomography

Study type: Interventional

Funder types: Other

Identifiers

NCT04774510

APHP210221

Details and patient eligibility

About

When it comes to acute stroke, everyone deserves the best care. Today, more patients can benefit from endovascular treatment (EVT) in a comprehensive stroke center. With the significant advances in C-arm Cone Beam CT (CBCT) imagings directly in the neuro angio-suite (NAS), the investigators are now able to identify, plan and treat stroke patients in the NAS, without the need for a separate CT scan. This provides valuable, time-saving support for critical patients in acute need of EVT. The main objective is to assess the diagnostic confidence of this optimized C-arm Cone Beam CT, named in french ASO, in the NAS for the detection of brain abnormalities and hemorrhagic complications for critical patients with acute stroke. The secondary objectives are to study the variability of the diagnostic accuracy concerning the staging of the stroke, the analysis of the brain vessel, the relevance of artefact reduction post treatment and the amount of dose for this ASO.

Full description

Design: ASO-AVC is a french academic pilot study by exploring the diagnostic confidence of optimized C-arm Cone Beam CT (ASO) realized directly in the neuro angio-suite (NAS).

To compare the effectiveness and safety of ASO diagnostic, the variability of the diagnostic accuracy concerning the staging of the stroke, the analysis of the brain vessel, the relevance of artefact reduction post treatment and the amount of delivered dose, the investigator proposed to assess clinical usefulness of ASO in the diagnostic process of stroke.

Intervention: No modification of patient care will be required by this protocol.

All patients participating in the study will undergo standard diagnostic, procedural and control imagings, which consist of : diagnostic imaging studies (MRI or CT scan), usual C-arm Cone Beam CT in the NAS during EVT to insure no procedural complication and control imaging studies (MRI or CT scan) at 24 hours ; decisions concerning further diagnostics will be made by the physician in charge.

Apart from theses standard imagings, patients will undergo the ASO. The ASO imagings will be anonymized and recorded in a centralized database called PACS (Picture Archiving and Communication System), in order to a centralized radiological reading by the Imaging Core Lab. They will be reviewed by radiologist readers to rate diagnostic image quality through a questionnaire, and in a second time the data will be included in a comparative evaluation with the diagnostic and control imagings.

Enrollment: 38 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

aged ≥ 18 years diagnosed with an acute stroke and needed for a EVT affiliation to compulsory French social security scheme (beneficiary or right-holder) Consent from the patient if their level of consciousness is sufficient or from their relatives. If none is possible at the inclusion, consent will be obtained as soon as possible

Exclusion criteria

Being under tutelage or legal guardianship ; Ongoing pregnancy, breastfeeding

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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38 participants in 1 patient group

Optimized C-ARM CBCT

Other group

Description:

An optimized C-arm CBCT evaluation with a different acquisition geometry and a novel software for the rapid, quality improved and less-artefacts assessment of brain parenchyma and angiogram.

Treatment:

Other: Diagnostic Test: optimized C-Arm Cone Beam Computed Tomography