Significance of enhanced cerebral gray–white matter contrast at 80kVp compared to conventional 120kVp CT scan in the evaluation of acute stroke

We aimed to determine whether 80kVp conventional nonenhanced head CT scans have better gray–white matter contrast than standard 120kVp scans performed on the same patients. Thirty head CT scans acquired at 80kVp (CT dose index [CTDI]vol 46) were compared to prior studies in the same patients perform...

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Bibliographic Details
Published in:Journal of clinical neuroscience 2014-09, Vol.21 (9), p.1591-1594
Main Authors: Ben-David, Eliel, Cohen, Jose E., Nahum Goldberg, S., Sosna, Jacob, Levinson, Reuven, Leichter, Isaac S., Gomori, John M.
Format: Article
Language:English
Subjects:
Acute ischemic stroke
Computed tomography
Low dose
Low kVp
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Summary:We aimed to determine whether 80kVp conventional nonenhanced head CT scans have better gray–white matter contrast than standard 120kVp scans performed on the same patients. Thirty head CT scans acquired at 80kVp (CT dose index [CTDI]vol 46) were compared to prior studies in the same patients performed at 120kVp (CTDIvol 59). Signal (Hounsfield units [HU]), noise (sd HU), and contrast-to-noise ratio per dose (CNRD) were assessed in multiple cerebral gray and white matter regions of interest. A noise correction factor was used to compensate for scanning at different CTDIvol values. Average gray matter signal at 80kVp and 120kVP was 33.9±3.5HU and 29±4.6HU, respectively (p
ISSN:0967-5868
1532-2653
DOI:10.1016/j.jocn.2014.03.008