Factors Affecting Attenuation of Dural Sinuses on Noncontrasted Computed Tomography Scan

Al-Ryalat, Nosaiba; AlRyalat, Saif Aldeen; Malkawi, Lna; Al-Zeena, Ethar F.; Najar, Mahasen S. Al; Hadidy, Azmy M.

doi:10.1016/j.jstrokecerebrovasdis.2016.07.002

Cited by 11 publications

(17 citation statements)

References 16 publications

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“…This finding is also appreciated in research by AlRyalat et al . 10 . This suggests that redefining H:H ratio as Hounsfield-Hgb ratio might be helpful in increasing the sensitivity of NCCT readings.…”

Section: Discussionmentioning

confidence: 99%

“…This finding is also supported by Alryalat et al . 10 . We also suggest further evaluation in patients with average sinus attenuation greater than 65 HU.…”

Section: Discussionmentioning

confidence: 99%

“…Although the prognosis is highly dependent on timely diagnosis and prompt anticoagulation therapy 4,5 , the insidious onset and non-specific complaints cause an average 7-day delay from the symptoms to the diagnosis 6–9 . Non-contrast computed tomography (NCCT) is widely used as the initial imaging modality of choice in neurological emergencies 2,10–13 . Increased attenuation of cerebral sinus venous structures is considered the only direct finding of acute CVST in the NCCT 11,14,15 .…”

Section: Introductionmentioning

confidence: 99%

“…Increased sinus attenuation has the advantage of being objective and easily calculated, while being able to diagnose CVST in the acute stage, when treatment is most likely to be effective and associated with favorable outcome 13 . The drawback of this sign is the influence of various factors like serum hematocrit level and dehydration on sinus attenuation that may lead to false positive results and inappropriate disposition 2,10,11,15 . The possibility of changing the intracranial vasculature computed tomography (CT) attenuation under the influence of variable factors is a long-held unestablished belief.…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting dural sinus density in non-contrast computed tomography of brain

Akhavan

Abbasi

Kheirollahi

et al. 2019

Sci Rep

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The possibility of changing the intracranial vasculature computed tomography (CT) attenuation under the influence of variable factors is a long-held unestablished belief. The purpose of this study is to evaluate factors affecting dural sinus density in non-contrast computed tomography of the brain. Patients presented with acute neurologic symptoms to the emergency department were candidates to be enrolled in this study. A region of interest (ROI) measuring 1–2-mm 2 recorder (base on sinus size) used to measure the attenuation of each sinus in Hounsfield Unit (HU) and then mean density calculated. CBC, BUN and Cr were extracted from patients’ records. Chi-square test, correlation analyze, independent sample unpaired student t-test and one-way ANOVA test and Multivariate logistic regression were used. Positive significant correlation (0.48) was found between the hematocrit level (HCT) and average attenuation in the four sinus segments (P value < 0.0001) and between the HCT and basilar artery attenuation (P value < 0.0001). There was no significant correlation between the age and average attenuation. There was a significant and negative correlation between the BUN/Cr and average attenuation. Using a multivariate analysis on a large sample volume, we conclude that Hgb and HCT are the only factors that have a significant correlation with average sinus attenuation. This correlation is relatively stronger for Hgb in comparison to HCT.

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Section: Discussionmentioning

confidence: 99%

“…This finding is also supported by Alryalat et al . 10 . We also suggest further evaluation in patients with average sinus attenuation greater than 65 HU.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Factors affecting dural sinus density in non-contrast computed tomography of brain

Akhavan

Abbasi

Kheirollahi

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…and sex, should be considered when determining the attenuation of the DVS. 3,4 When sex is considered, an increase of 10 HU correlates to a 2.26-g/ dL increase in Hb in males and 0.87-g/dL in females. 3 (doi:10.7556/jaoa.2019.035)…”

mentioning

confidence: 99%