By a News Reporter-Staff News Editor at Health & Medicine Week -- Investigators publish new report on Radiology. According to news originating from Chiba, Japan, by NewsRx correspondents, research stated, "The X'tal cube is a depth-of-interaction (DOI)-PET detector which is aimed at obtaining isotropic resolution by effective readout of scintillation photons from the six sides of a crystal block. The X'tal cube is composed of the 3D crystal block with isotropic resolution and arrays of multi-pixel photon counters (MPPCs)."
Our news journalists obtained a quote from the research from the National Institute of Radiological Sciences, "In this study, to fabricate the 3D crystal block efficiently and precisely, we applied a sub-surface laser engraving (SSLE) technique to a monolithic crystal block instead of gluing segmented small crystals. The SSLE technique provided micro-crack walls which carve a groove into a monolithic scintillator block. Using the fabricated X'tal cube, we evaluated its intrinsic spatial resolution to show a proof of concept of isotropic resolution. The 3D grids of 2 mm pitch were fabricated into an 18 x 18 x 18 mm(3) monolithic lutetium yttrium orthosilicate (LYSO) crystal by the SSLE technique. 4 x 4 MPPCs were optically coupled to each surface of the crystal block. The X'tal cube was uniformly irradiated by (22)Na gamma rays, and all of the 3D grids on the 3D position histogram were separated clearly by an Anger-type calculation from the 96-channel MPPC signals. Response functions of the X'tal cube were measured by scanning with a (22)Na point source. The gamma-ray beam with a 1.0 mm slit was scanned in 0.25 mm steps by positioning of the X'tal cube at vertical and 45° incident angles. The average FWHM resolution at both incident angles was 2.1 mm."
According to the news editors, the research concluded: "Therefore, we confirmed the isotropic spatial resolution performance of the X'tal cube."
For more information on this research see: Intrinsic spatial resolution evaluation of the X'tal cube PET detector based on a 3D crystal block segmented by laser processing. Radiological Physics and Technology, 2013;6(1):21-7. Radiological Physics and Technology can be contacted at: Springer, 233 Spring Street, New York, NY 10013, USA. (Springer - www.springer.com; Radiological Physics and Technology - www.springerlink.com/content/1865-0333/)
The news correspondents report that additional information may be obtained from E. Yoshida, Molecular Imaging Center, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan. Additional authors for this research include H. Tashima, N. Inadama, F. Nishikido, T. Moriya, T. Omura, M. Watanabe, H. Murayama and T. Yamaya (see also Radiology).
The publisher's contact information for the journal Radiological Physics and Technology is: Springer, 233 Spring Street, New York, NY 10013, USA.
Keywords for this news article include: Asia, Chiba, Japan, Radiology.
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