PT  - JOURNAL ARTICLE
AU  - Yoshida, Eiji
AU  - Hirano, Yoshiyuki
AU  - Tashima, Hideaki
AU  - Watanabe, Mitsuo
AU  - Nishikido, Fumihiko
AU  - Murayama, Hideo
AU  - Inadama, Naoko
AU  - Yamaya, Taiga
TI  - Impact of the X’tal cube detector with isotropic resolution on PET image resolution
DP  - 2012 May 01
TA  - Journal of Nuclear Medicine
PG  - 49--49
VI  - 53
IP  - supplement 1
4099  - http://jnm.snmjournals.org/content/53/supplement_1/49.short
4100  - http://jnm.snmjournals.org/content/53/supplement_1/49.full
SO  - J Nucl Med2012 May 01; 53
AB  - 49 Objectives The X’tal cube is our new PET detector, which is being developed to achieve isotropic 3D positioning detectability. The X’tal cube is based on a segmented 3D crystal block for which all surfaces are covered with photo-detectors. We have shown that the X’tal cube can achieve isotropic intrinsic resolution with the Anger-type calculation even at the block edges. In this work, we developed a new one pair prototype system to simulate a ring-type scanner, and evaluated imaging performance of the X’tal cube detector. Methods The developed system consisted of two X’tal cube detectors, two rotating stages, and a 192-channel data acquisition system. The X’tal cube consisted of the LYSO cubic crystal block of (18 mm)3 in which the 3D grids of 2 mm pitch were fabricated by the internal laser processing. 4 x 4 arrays of multi pixel photon counters (MPPCs) were optically coupled to each surface of the crystal block. The detector positions were automatically controlled to simulate a ring-type PET of 14.6 cm in diameter. Data were collected for assumed all detector positions and then a sinogram was obtained. The data were reconstructed using the filtered backprojection. Results We successfully obtained uniform spatial resolution less than 2 mm over the FOV. Conclusions We developed a one pair prototype system for the X’tal cube detector, and we confirmed its potential for high-resolution imaging. Research Support This research was supported by a fund from Japan Science and Technology Agency (JST), Development of Systems and Technology for Advanced Measurement and Analysis