Improved early stroke detection: wavelet-based perception enhancement of computerized tomography exams.
Nonenhanced computerized tomography (CT) exams were used to detect acute stroke by notification of hypodense area. Infarction perception improvement by data denoising and local contrast enhancement in multi-scale domain was proposed. The wavelet-based image processing method enhanced the subtlest signs of hypodensity, which were often invisible in standard CT scan review. Thus improved detection efficiency of perceptual ischemic changes was investigated. Data processing became more effective by initial segmentation of brain tissue and extraction of regions susceptible to tissue density changes. The new method was experimentally verified. Sensitivity of stroke diagnosis increased to 56.3% in comparison to 12.5% of standard CT scan preview.
Przelaskowski
A
A
Institute of Radioelectronics, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warszawa, Poland. arturp@ire.pw.edu.pl
Sklinda
K
K
Bargieł
P
P
Walecki
J
J
Biesiadko-Matuszewska
M
M
Kazubek
M
M
D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D001185:Artificial Intelligence; D020526:Brain Stem Infarctions / Q000000981:diagnostic imaging; D002544:Cerebral Infarction / Q000000981:diagnostic imaging*; D042241:Early Diagnosis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted; D020244:Infarction, Middle Cerebral Artery / Q000000981:diagnostic imaging; D016014:Linear Models; D008297:Male; D008432:Mathematical Computing; D008875:Middle Aged; D011149:Pons / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement; D012680:Sensitivity and Specificity; D012984:Software; D014057:Tomography, X-Ray Computed