ArticleEmergency radiology2026
Necessity of whole-body CT in patients with acute ischemic stroke and proposal for a simple brain perfusion imaging and whole-body CT protocol using split-bolus injection.
Article in Emergency radiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study aimed to evaluate the necessity of whole-body computed tomography (CT) in patients with acute ischemic stroke (AIS) and to assess the usefulness of a simple imaging protocol combining brain CT perfusion (CTP) and whole-body CT using low-tube voltage and split-bolus injection (SPBI).
methodsWe retrospectively analyzed 123 patients with suspected AIS who underwent both brain CTP and whole-body CT between April 2022 and May 2025. Image quality, vascular and parenchymal CT values, diagnostic findings, and incidence of post-contrast acute kidney injury (PC-AKI) were assessed. A control group of 115 patients who underwent dynamic contrast-enhanced CT of the chest and abdomen was used for comparison.
resultsThe proposed protocol achieved high CT values (≥ 350 HU) in major vessels and comparable CT enhancement in organs compared to the control group. Visual assessment yielded very high scores (vessels, 4.975; organs, 3.725) and complete inter-reader agreement (vessels, k = 0.98; organs, k = 0.877). Only one patient (0.8%) who underwent mechanical thrombectomy developed PC-AKI. Whole-body CT revealed clinically significant vascular disease (including aortic dissection, pulmonary embolism, and severe carotid stenosis) in 14.6% of cases and incidental suspected malignancy in 5.7% of cases.
conclusionFollowing brain CTP, whole-body CT enables the detection of significant vascular and incidental findings in patients with suspected AIS and provides valuable diagnostic information. This protocol, which utilizes low-tube voltage and SPBI, is a simple, time-efficient, and safe method that enhances vascular and organ contrast, supporting its clinical utility in AIS diagnosis.
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