[Development of an algorithm for the detection of early signs of cerebral ischemia on CT images]

[Development of an algorithm for the detection of early signs of cerebral ischemia on CT images] Research Abstract Details 

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[Development of an algorithm for the detection of early signs of cerebral ischemia on CT images] Abstract Text:

Noriyuki Takahashi,Yongbum Lee,Du-Yih Tsai,Kiyoshi Ishii,Noriyuki Takahashi,Yongbum Lee,Du-Yih Tsai,Kiyoshi Ishii,Noriyuki Takahashi,Yongbum Lee,Du-Yih Tsai,Kiyoshi Ishii,

This paper describes an approach to automatically detect the parenchymal hypoattenuation of hyperacute stroke in nonenhanced computed tomography (CT) images. This technique is based on a comparison between the CT values histograms of right and left brains. A subtraction curve that was regarded as an output value was calculated by subtracting the right-hemispherical histogram from the left-hemispherical histogram obtained from one of the region-of-interest (ROI) sets on an image. The output value was used to assess whether hypoattenuation exists on CT images with a threshold value. If judged abnormal, a rectangular region including a whole or partial hypoattenuation area was detected from the ROI. Twenty-six cases with hypoattenuation and 30 cases without hypoattenuation were included in this study. As a result of our experiments, the sensitivity of this method in detecting hypoattenuation was found to be 92%, with approximately 0.16 false-positive per image. Our preliminary experimental results indicated that the proposed technique can be used for the automated detection of parenchymal hypoattenuation of hyperacute stroke on nonenhanced CT images.

[Development of an algorithm for the detection of early signs of cerebral ischemia on CT images] Publishing Authors By Initials

N Takahashi,Y Lee,DY Tsai,K Ishii,N Takahashi,Y Lee,DY Tsai,K Ishii,N Takahashi,Y Lee,DY Tsai,K Ishii,

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[Development of an algorithm for the detection of early signs of cerebral ischemia on CT images] Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Nippon Hoshasen Gijutsu Gakkai zasshi

VOLUME: 63

Page Numbers: 835-42

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ISSN: 0369-4305

DAY: 20

MONTH: Aug

YEAR: 2007

[Development of an algorithm for the detection of early signs of cerebral ischemia on CT images] Information

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LANGUAGE: jpn

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AFFILIATION: Department of Radiology, Sendai City Hospital.

Country: Japan

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MEDLINETA: Nippon Hoshasen Gijutsu Gakkai

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