Title of article :
Detector position estimation for PET scanners
Author/Authors :
Pierce، نويسنده , , Larry and Miyaoka، نويسنده , , Robert and Lewellen، نويسنده , , Tom and Alessio، نويسنده , , Adam and Kinahan، نويسنده , , Paul، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
6
From page :
74
To page :
79
Abstract :
Physical positioning of scintillation crystal detector blocks in Positron Emission Tomography (PET) scanners is not always exact. We test a proof of concept methodology for the determination of the six degrees of freedom for detector block positioning errors by utilizing a rotating point source over stepped axial intervals. To test our method, we created computer simulations of seven Micro Crystal Element Scanner (MiCES) PET systems with randomized positioning errors. The computer simulations show that our positioning algorithm can estimate the positions of the block detectors to an average of one-seventh of the crystal pitch tangentially, and one-third of the crystal pitch axially. Virtual acquisitions of a point source grid and a distributed phantom show that our algorithm improves both the quantitative and qualitative accuracy of the reconstructed objects. We believe this estimation algorithm is a practical and accurate method for determining the spatial positions of scintillation detector blocks.
Keywords :
Mis-positioning , Positron emission tomography , ALIGNMENT
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Serial Year :
2012
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Record number :
2205953
Link To Document :
بازگشت