title: Factors influencing intracranial vessel densities on unenhanced computed tomography: differences between hemispheres.
abstract: The aim was to identify the factors influencing intracranial vessel density (VD). The Hounsfield units of the dense vessel and the contralateral side were measured in 34 patients with arterial clots, 20 with venous clots, and 196 without clots and correlated with skull thickness, density and dimensions, gender, age, red blood cell count (RBC), hemoglobin (HB), hematocrit (HT), creatinine, and sodium. Positive correlations were found between VD and HT, RBC, HB, creatinine, and occipital bone density. Density differences between the right and left intracranial vessels were more accurate (sensitivity/specificity/accuracy=0.91/0.93/0.93 and 0.75/0.87/0.85, respectively) for detecting clots than VD alone. HT, RBC, and HB are the main factors that correlate with VD.
authors.affiliation: Department of Neuroradiology, Medical University Innsbruck, Austria. Electronic address: astrid.grams@gmail.com.
authors.forename: Astrid E
authors.initials: AE
authors.lastname: Grams
authors.affiliation: Department of Radiology, Medical University Innsbruck, Austria.
authors.forename: Rafael
authors.initials: R
authors.lastname: Rehwald
authors.affiliation: Department of Neuroradiology, University Hospital Gießen, Justus Liebig University, Germany.
authors.forename: Charlotte
authors.initials: C
authors.lastname: Schmittnägel
authors.affiliation: Department of Diagnostic and Interventional Neuroradiology, Helios Wuppertal, University Witten-Herdecke, Germany.
authors.forename: Thorsten
authors.initials: T
authors.lastname: Schmidt
authors.affiliation: Department of Neurology, University Hospital Gießen, Justus Liebig University, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Tanislav
authors.affiliation: Department of Neurology, University Hospital Gießen, Justus Liebig University, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Berghoff
authors.affiliation: Department of Radiology, University Hospital Gießen, Justus Liebig University, Germany.
authors.forename: Gabriele A
authors.initials: GA
authors.lastname: Krombach
authors.affiliation: Department of Radiology, University Hospital Gießen, Justus Liebig University, Germany.
authors.forename: Regina
authors.initials: R
authors.lastname: Moritz
authors.affiliation: Department of Neuroradiology, University Hospital Gießen, Justus Liebig University, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Obert
authors.affiliation: Department of Neuroradiology, Medical University Innsbruck, Austria.
authors.forename: Elke R
authors.initials: ER
authors.lastname: Gizewski
authors.affiliation: Department of Radiology, Medical University Innsbruck, Austria.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Glodny
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001158:Arteries / Q000473:pathology*; D001921:Brain / Q000098:blood supply*; D004906:Erythrocyte Count; D004912:Erythrocytes; D005260:Female; D006400:Hematocrit; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012039:Regional Blood Flow; D012680:Sensitivity and Specificity; D012851:Sinus Thrombosis, Intracranial / Q000175:diagnosis* / Q000000981:diagnostic imaging; D013927:Thrombosis / Q000175:diagnosis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014680:Veins / Q000473:pathology*; D055815:Young Adult
chemical_list: D006454:Hemoglobins
keywords: Hematocrit; Intracranial clots; Intracranial vessel densities; Sinus thrombosis; Stroke