Quantification of Subarachnoid Hemorrhage by Three-Dimensional Computed Tomography: Correlation Between Hematoma Volume and Symptomatic Vasospasm
| Autor: | Tadashi Watanabe, Katsuyuki Kikori, Masahiro Sato, Eiji Ito, Masahiro Ichikawa, Kiyoshi Saito, Yoichi Watanabe, Hitoshi Ando, Yuka Matsumoto, Satoshi Taira, Taku Sato, Tatsuya Sasaki, Takeshi Yusa, Jun Sakuma, Kyouichi Suzuki |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty Subarachnoid hemorrhage Cerebral arteries Computed tomography Severity of Illness Index Imaging Three-Dimensional Cerebral vasospasm Hematoma Predictive Value of Tests Hounsfield scale medicine Humans Vasospasm Intracranial Longitudinal Studies Aged Aged 80 and over medicine.diagnostic_test business.industry Organ Size Middle Aged Reference Standards Subarachnoid Hemorrhage medicine.disease Female Surgery Neurology (clinical) Radiology Tomography Tomography X-Ray Computed business Volume (compression) |
| Zdroj: | Neurologia medico-chirurgica. 51:187-194 |
| ISSN: | 1349-8029 0470-8105 |
| DOI: | 10.2176/nmc.51.187 |
| Popis: | Subarachnoid hemorrhage (SAH) volume was measured by three-dimensional computed tomography (3D-CT) and the correlation examined between the SAH volume and the occurrence of symptomatic vasospasm (SVS). Experimental (in vitro) hematomas were made with blood obtained from 10 volunteers. The hematoma volume was determined by actual measurements and by 3D-CT using a CT number in the range of 40-80 Hounsfield units (HU) on days 1, 4, 7, 11, and 14. The coefficients on days 1 and 4 were relatively high and the correlation between measured and estimated volumes was significant on days 7, 11, and 14. 3D-CT was also performed in 50 patients with SAH at onset (day 0) and on days 1, 4, 7, and 14. The hematoma volume including the volume of normal structures was automatically calculated (V1). The volume of normal structures (V2) with CT numbers of 40-80 HU was calculated in another 50 patients without intracranial lesions as 12 ml. The total hematoma volume was defined as V1 minus mean V2. The mean SAH volume was 44, 36, 21, 11, and 8 ml on days 0, 1, 4, 7, and 14, respectively. The hematoma volumes were significantly larger in patients with SVS than in patients without SVS at all time points. The minimum hematoma volume in patients with SVS was 92, 76, 42, 24, and 12 ml on days 0, 1, 4, 7, and 14, respectively. This method allows the quantitative determination of SAH volume based on 3D-CT, and may be useful in clinical studies of cerebral vasospasm. |
| Databáze: | OpenAIRE |
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