Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Enhanced reconstruction for PET scanner with a narrow field of view using backprojection method (CROSBI ID 709351)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Matulić, Tomislav ; Bagarić, Robert ; Seršić, Damir Enhanced reconstruction for PET scanner with a narrow field of view using backprojection method // 44th International Convention on Information, Communication and Electronic Technology (MIPRO): Proceedings of the International Convention MIPRO. Institute of Electrical and Electronics Engineers (IEEE), 2021. str. 346-351 doi: 10.23919/MIPRO52101.2021.9596922

Podaci o odgovornosti

Matulić, Tomislav ; Bagarić, Robert ; Seršić, Damir

engleski

Enhanced reconstruction for PET scanner with a narrow field of view using backprojection method

There are several reconstruction methods for positron emission tomography (PET), but iterative methods based on maximum likelihood estimation are primarily used. In this paper, we propose a 2D reconstruction method for PET scanners that have a narrow field of view (FoV) in the tangential direction and are based on the backprojection (BP) method. If a PET scanner has a reduced field of view in the tangential direction, the reconstructed image obtained by 2D BP or 2D filtered backprojection produces significant distortions. We used the Raytest ClearPET TM scanner to obtain measurements. The ClearPET scanner consists of a maximum of 20 detector cassettes arranged in a ring configuration. The used ClearPET scanner contains only eight detector cassettes. By knowing the geometry of the ClearPET scanner, we determined a necessary compensation to reduce the undesirable effects caused by the narrow field of view. We simulated the response of all allowed coincidences located on the observed axial intersection of the ClearPET scanner, which we used to obtain an image for compensation. Because of finite dimension of a single crystal in the ClearPET scanner, we also added dithering to the measured and simulated data to minimize the quantization effect resulting from the reconstruction method. Ultimately, the image obtained by proposed compensation was significantly improved compared to the (filtered) backprojection method. Unlike iterative reconstruction methods, the proposed method is faster, but the resulting images show the object captured by the ClearPET scanner less accurately. The proposed method can be implemented as an initial condition in 2D reconstruction using an iterative method to accelerate convergence.

backprojection ; filtered backprojection ; Raytest ClearPET TM scanner ; dithering ; narrow field of view

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o prilogu

346-351.

2021.

nije evidentirano

objavljeno

10.23919/MIPRO52101.2021.9596922

Podaci o matičnoj publikaciji

44th International Convention on Information, Communication and Electronic Technology (MIPRO): Proceedings of the International Convention MIPRO

Institute of Electrical and Electronics Engineers (IEEE)

2623-8764

Podaci o skupu

MIPRO 2021

predavanje

27.09.2021-01.10.2021

Opatija, Hrvatska

Povezanost rada

Elektrotehnika, Računarstvo

Poveznice