Automatic Quantification of Subarachnoid Hemorrhage on Noncontrast CT

Boers, Anna M. M.; Zijlstra, Ijsbrand A.J.; Gathier, Celine S.; Berg, René van den; Slump, Cornelis H.; Marquering, Henk A.; Majoie, Charles B. L. M.

doi:10.3174/ajnr.a4042

Cited by 59 publications

(49 citation statements)

References 36 publications

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“…Very small blood volumes with low density are not well-detected with automated detection. 10 The volume assessments were performed on relatively thick sections of 5 mm. Thinner sections could potentially increase accuracy.…”

Section: Discussionmentioning

confidence: 99%

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Association of Automatically Quantified Total Blood Volume after Aneurysmal Subarachnoid Hemorrhage with Delayed Cerebral Ischemia

Zijlstra¹,

Gathier

Boers

et al. 2016

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE:The total amount of extravasated blood after aneurysmal subarachnoid hemorrhage, assessed with semiquantitative methods such as the modified Fisher and Hijdra scales, is known to be a predictor of delayed cerebral ischemia. However, prediction rates of delayed cerebral ischemia are moderate, which may be caused by the rough and observer-dependent blood volume estimation used in the prediction models. We therefore assessed the association between automatically quantified total blood volume on NCCT and delayed cerebral ischemia.

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Section: Discussionmentioning

confidence: 99%

“…10 In the current study, we aimed to assess the association of automatically quantified TBV with DCI.…”

mentioning

confidence: 99%

Association of Automatically Quantified Total Blood Volume after Aneurysmal Subarachnoid Hemorrhage with Delayed Cerebral Ischemia

Zijlstra¹,

Gathier

Boers

et al. 2016

AJNR Am J Neuroradiol

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“…Thus, the possibility that the Hijdra score has a higher association to DCI as the Fisher and modified Fisher score cannot be ruled out. Recently, new radiological scales like the Barrow Neurological Institute SAH Grading Scale, incorporation of the Modified Graeb score to the modified Fisher, and quantification of SAH volume have been introduced [67,[68][69][70][71]. These scales measure the amount of blood in a more quantitative manner and have shown high associations with DCI and reduced interobserver variability.…”

Section: Discussionmentioning

confidence: 99%

Radiological scales predicting delayed cerebral ischemia in subarachnoid hemorrhage: systematic review and meta-analysis

et al. 2019

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Purpose Delayed cerebral ischemia (DCI) is a severe complication of aneurysmal subarachnoid hemorrhage (aSAH). The extent of subarachnoid blood is a strong predictor of DCI and is frequently estimated with the Fisher scale, modified Fisher scale, or Hijdra sum score. It is unclear which scale has the strongest association with clinical DCI. To evaluate this, we performed a systematic review of the literature. Methods We performed a MEDLINE and EMBASE search from 1980 to 20th of June 2017. Radiological grade and occurrence of clinical DCI were extracted along with odds ratios (ORs) for DCI. When possible, pooled ORs with 95% confidence intervals were calculated per grade increase on the radiological scale.Results Fifty-three studies were included. The Fisher scale was significantly associated with DCI in 62% of the studies compared to 88-100% for the other scales. In studies using the Fisher scale, Fisher 3 had the strongest association with DCI (pooled OR 3.21 (1.87-5.49)). In studies using the modified Fisher score, DCI occurred most frequently (42%) in modified Fisher 4. No pooled OR could be calculated for the other scales. Conclusion The Fisher scale, modified Fisher scale, and Hijdra sum score are all associated with clinical DCI. The risk of DCI, however, does not increase with increasing Fisher grade as opposed to the modified Fisher scale. Furthermore, the modified Fisher scale was more commonly significantly associated with DCI than the Fisher scale, which may advocate using the modified Fisher in future SAH-related studies.

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“…The atlas is based on the Laboratory of Neuro Imaging Probabilistic Brain Atlas (LPBA40),19 as described by Boers et al 20. This atlas consists of 27 labeled brain structures, most of which are within the cortex.…”

Section: Methodsmentioning

confidence: 99%

Topographic distribution of cerebral infarct probability in patients with acute ischemic stroke: mapping of intra-arterial treatment effect

Boers

Berkhemer

Slump

et al. 2016

J NeuroIntervent Surg

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Automatic Quantification of Subarachnoid Hemorrhage on Noncontrast CT

Cited by 59 publications

References 36 publications

Association of Automatically Quantified Total Blood Volume after Aneurysmal Subarachnoid Hemorrhage with Delayed Cerebral Ischemia

Association of Automatically Quantified Total Blood Volume after Aneurysmal Subarachnoid Hemorrhage with Delayed Cerebral Ischemia

Radiological scales predicting delayed cerebral ischemia in subarachnoid hemorrhage: systematic review and meta-analysis

Topographic distribution of cerebral infarct probability in patients with acute ischemic stroke: mapping of intra-arterial treatment effect

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