TY  - GEN
SP  - 1
UR  - http://dx.doi.org/10.1117/12.3029040
TI  - X-ray micro-computed tomography with amplitude modulated beams (beam tracking, edge illumination): opportunities, challenges, and outlook
ID  - discovery10199367
N1  - This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.
EP  - 6
AV  - public
N2  - In recent years, x-ray micro-computed tomography (micro-CT) systems with amplitude modulated beams have gained global interest. These systems feature a modulator, that is, an x-ray opaque mask with periodically spaced apertures, in front of the sample, creating an array of spatially separated beamlets. The approach offers x-ray phase contrast imaging (XPCI), which improves the contrast-to-noise ratio and reveals the presence of sub-resolution inhomogeneities by capturing, respectively, refraction and ultra-small angle scattering (dark field signal) alongside x-ray attenuation. Additionally, the modulator can increase spatial resolution, as the narrow beamlets can transfer higher spatial frequencies without requiring geometric magnification. This brief communication reviews the working principle of the approach and comments on a remaining challenge (relatively long scan times).
A1  - Hagen, Charlotte K
A1  - Lioliou, Grammatiki
A1  - Roche i Morgo, Oriol
A1  - Shah, Khushal
A1  - Zekavat, Amir
A1  - Astolfo, Alberto
A1  - Munro, Peter
A1  - Cipiccia, Silvia
A1  - Endrizzi, Marco
A1  - Olivo, Alessandro
PB  - Society of Photo-Optical Instrumentation Engineers (SPIE)
Y1  - 2024///
ER  -