Fast tomography using quasi-monochromatic undulator radiation.
A beamline with a helical undulator has been used without a monochromator for fast high-resolution tomographic imaging with an X-ray energy of 12.4-16.5 keV and an energy bandwidth of 2-3%. The X-ray beam was expanded with two mirrors to 12 mm x 4 mm. The X-ray field was made uniform by a diffuser. The detector pixel size was 9.9 microm x 9.9 microm. At the highest speed, a 180 degrees scan was completed in 6 s with 454 projections. Beam-hardening effects were not significant. This technique may be useful in studying time-dependent structural changes of soft materials such as polymers and biological samples.
Uesugi
Kentaro
K
SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan. ueken@spring8.or.jp
Sera
Toshihiro
T
Yagi
Naoto
N
D000818:Animals; D003287:Contrast Media / Q000494:pharmacology; D004867:Equipment Design; D005121:Extremities / Q000000981:diagnostic imaging; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D051379:Mice; D011108:Polymers / Q000737:chemistry; D011874:Radiometry; D017356:Synchrotrons; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014965:X-Rays
D003287:Contrast Media; D011108:Polymers