Speaker
Mr
Carlos Granja
(researcher)
Description
Imaging of soft tissue demands high sensitivity and contrast enhancing techniques in
order to reliably detect and resolve structures and patterns of small size and of
similar atomic composition. For these purposes, traditional X–ray transmission–based
radiography is limited by the low and homogenous absorption of X–rays in soft tissue.
Phase shift contrast imaging can bring additional information by diffraction and
interference effects in the wave–nature properties of photon beams induced by varied
media and structures in soft tissue. We investigate the potential and advantages of
phase contrast as a supplementary tool in X-ray imaging and tomography of soft tissue
in small insects and organic samples. We implement high spatial resolution soft X–ray
2D and 3D imaging making use of the state–of–the–art Medipix–2 semiconductor pixel
detector and microspot X–ray tube in addition to geometric magnification. We achieve
high performance soft X–ray detection by our single photon counting system having
high sensitivity and unlimited dynamic range. Data collection has been eased by a new
USB–based readout together with online image generation. Improved signal
reconstruction techniques make use of advanced statistical data analysis, enhanced
beam hardening correction using individual pixel calibration and devoted algorithms
for tomographic reconstruction.
Authors
Mr
Carlos Granja
(researcher)
Mr
Jan Jakubek
(researcher)
Co-authors
Mr
Jiri Dammer
(student)
Mr
Josef Uher
(researcher)
Mr
Richard Tykva
(researcher)
Mr
Robert Hanus
(researcher)
Dr
Stanislav Pospisil
(researcher, director)
Mr
Tomas Holy
(student)
Mr
Vykydal Vykydal
(researcher)
