Evaluation of Patients with Acute Ischemic Stroke Using Angiographic C-arm Cerebral Blood Volume (C-arm CBV) Measurements

Moriya, M.; Itokawa, Hiroshi; Fujimoto, Michio; Okamoto, Noriyoshi; Sasanuma, Jinichi

doi:10.5797/jnet.oa.2017-0015

Cited by 1 publication

(3 citation statements)

References 12 publications

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“…Mask images (mask run) were first acquired and fill images (fill run) were acquired post-contrast injection. We applied the following protocol: 16,18 acquisition time, 6 seconds; x-ray tube voltage, 70 kV; total angle, 200°; projections, 400; dose, 0.36 mGy/ frame; and x-ray delay, 9 seconds. We used contrast medium with an iodine concentration of 300 mg/mL.…”

Section: Fpd Cbv and Mra Imaging Protocolsmentioning

confidence: 99%

“…Furthermore, FPD CT has also been used to generate FPD CBV images with an intravenous contrast injection, 12 which are potentially useful for prediction of the final infarct volume in patients with AIS with LVO [13][14][15] and of hemorrhagic infarction post-MT. 16 The image reconstruction of FPD CBV datasets provides FPD CT angiographic images that are comparable with CTA with regard to the visualization of LVO, collateral state, and clot extent. 12 Moreover, FPD CBV images can be obtained using an intra-arterial diluted contrast injection, 16,17 which requires less contrast material.…”

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confidence: 99%

“…16 The image reconstruction of FPD CBV datasets provides FPD CT angiographic images that are comparable with CTA with regard to the visualization of LVO, collateral state, and clot extent. 12 Moreover, FPD CBV images can be obtained using an intra-arterial diluted contrast injection, 16,17 which requires less contrast material. However, it remains unclear whether the vessels distal to the occlusion site in patients with stroke can be evaluated on the FPD CT angiographic images with intra-arterial diluted contrast injection.…”

mentioning

confidence: 99%

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Distal Vessel Imaging via Intra-arterial Flat Panel Detector CTA during Mechanical Thrombectomy

Nozaki

Noda²,

Ishibashi

et al. 2020

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE: Obtaining information on invisible vasculature distal to the occlusion site helps to deploy a stent retriever safely during mechanical thrombectomy for large-vessel occlusion. It is essential to reduce the amount of contrast used for detecting the vessels distal to the occlusion site because acute ischemic stroke patients tend to have chronic kidney disease and patients with severe chronic kidney disease are at an increased risk of contrast-associated acute kidney injury. We assessed whether vessels distal to the occlusion site during acute ischemic stroke with large-vessel occlusion could be visualized on angiographic images using flat panel detector CT acquired following intra-arterial diluted contrast injection, compared with MRA findings. MATERIALS AND METHODS:Between May 2019 and January 2020, we enrolled 28 consecutive patients with large-vessel occlusions of the anterior circulation eligible for mechanical thrombectomy following MR imaging. The patients underwent CBV imaging using flat panel detector CT with an intra-arterial diluted contrast injection instead of intravenous injection. Flat panel detector CT angiographic images reconstructed from the same dataset were evaluated for image quality, collateral status of the MCA territory, and visualization of the vessels distal to the occlusion site. These findings were compared with MRA findings. RESULTS:Twenty-two patients were retrospectively examined. Flat panel detector CT angiographic image quality in 20 patients (91%) was excellent or good. The distal portion of the occluded vessel segment was visualized in 14 patients (70%), while the proximal portion of the segment adjacent to the occluded vessel in 3 (15%) was visualized. No visualization was observed in only 1 patient (5%) with no collateral supply. Flat panel detector CT angiographic images were shown to evaluate vessels distal to the occlusion site more accurately than MRA. CONCLUSIONS:In acute ischemic stroke with large-vessel occlusion, flat panel detector CT angiographic images could successfully visualize vessels distal to the occlusion site with a small amount of contrast material.

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Section: Fpd Cbv and Mra Imaging Protocolsmentioning

confidence: 99%