Reconstruction of hit time and hit position of annihilation quanta in the J-PET detector using the Mahalanobis distance

被引：15

作者：

Sharma, Neha Gupta ^{[1
]}

Silarski, Michal ^{[1
]}

Bednarski, Tomasz ^{[1
]}

Bialas, Piotr ^{[1
]}

Czerwinski, Eryk ^{[1
]}

Gajos, Aleksander ^{[1
]}

Gorgol, Marek ^{[3
]}

Jasinska, Bozena ^{[3
]}

Kaminska, Daria ^{[1
]}

Kaplon, Lukasz ^{[1
,2
]}

Korcyl, Grzegorz ^{[1
]}

Kowalski, Pawel ^{[4
]}

Kozik, Tomasz ^{[1
]}

Krzemien, Wojciech ^{[5
]}

Kubicz, Ewelina ^{[1
]}

Niedzwiecki, Szymon ^{[1
]}

Palka, Marek ^{[1
]}

Raczynski, Lech ^{[4
]}

Rudy, Zbigniew ^{[1
]}

Rundel, Oleksandr ^{[1
]}

Slomski, Artur ^{[1
]}

Strzelecki, Adam ^{[1
]}

Wieczorek, Anna ^{[1
,2
]}

Wislicki, Wojciech ^{[4
]}

Zielinski, Marcin ^{[1
]}

Zgardzinska, Bozena ^{[3
]}

Moskal, Pawel ^{[1
]}

机构：

[1] Jagiellonian Univ, Fac Phys Astron & Appl Comp Sci, PL-30348 Krakow, Poland

[2] Polish Acad Sci, Inst Met & Mat Sci, PL-30059 Krakow, Poland

[3] Marie Curie Sklodowska Univ, Inst Phys, Dept Nucl Methods, PL-20031 Lublin, Poland

[4] Natl Ctr Nucl Res, Swierk Comp Ctr, PL-05400 Otwock, Poland

[5] Natl Ctr Nucl Res, Div High Energy Phys, PL-05400 Otwock, Poland

来源：

NUKLEONIKA | 2015年 / 60卷 / 04期

关键词：

J-PET detector; Mahalanobis distance; time resolution; threshold levels; PLASTIC SCINTILLATORS; SIGNALS; SCANNER;

D O I：

10.1515/nuka-2015-0138

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The J-PET detector being developed at the Jagiellonian University is a positron emission tomograph composed of the long strips of polymer scintillators. At the same time, it is a detector system that will be used for studies of the decays of positronium atoms. The shape of photomultiplier signals depends on the hit time and hit position of the gamma quantum. In order to take advantage of this fact, a dedicated sampling front-end electronics that enables to sample signals in voltage domain with the time precision of about 20 ps and novel reconstruction method based on the comparison of examined signal with the model signals stored in the library has been developed. As a measure of the similarity, we use the Mahalanobis distance. The achievable position and time resolution depend on the number and values of the threshold levels at which the signal is sampled. A reconstruction method as well as preliminary results are presented and discussed.

引用

页码：765 / 769

页数：5

共 32 条

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