ESTIMATION OF CONCRETE STRENGTH BY X-RAY TECHNIQUE WITH CONTRAST MEDIUM

Presumption of deterioration concrete strength by small size core and X- ray technique with contrast medium

This paper proposes a method of evaluating the strength of concrete below a degraded surface determined from an x-ray image taken of a 10 mm and 30 mm core cut from the insitu concrete. The image was enhanced by impregnation of the surface with a contrast medium. Several types of concrete having different water-cement ratio were used in the experiment. As a result, it is showed that the strengt...

Vessel imaging by interferometric phase-contrast X-ray technique.

BACKGROUND Phase-contrast x-ray imaging using an x-ray interferometer has great potential to reveal the structures inside soft tissues, because the sensitivity of this method to hydrogen, carbon, nitrogen, and oxygen is approximately 1000 times higher than that of the absorption-contrast x-ray method. Imaging of vessels is very important to understand the vascular distribution of organs and tum...

Real-time contrast medium detection in x-ray images by mathematical morphology operators

This article proposes a solution to contrast agent detection in angiograms by considering X-ray images as intensity images and applying mathematical morphology operators. We present two detection approaches, one based on the intensity infimum and the other based on the dual reconstruction. The evaluation using several data sets shows that both techniques are able to detect the presence of the c...

Contrast with a 3D X-ray Microscope

Change of Image Quality by Fixation Technique in Phase-contrast X-ray Image