Assessment of DOI resolution in a fully mounted PEM scanner

Author

Matela, N. ; Ferreira, C.S. ; Martins, M.V. ; Bugalho, R. ; Neves, J.A. ; Ortigão, C. ; Oliveira, N. ; Varela, J. ; Almeida, P.

Author_Institution

Inst. de Biofisica e Eng. Biomed., Univ. de Lisboa, Lisbon, Portugal

fYear

2011

fDate

23-29 Oct. 2011

Firstpage

3351

Lastpage

3353

Abstract

The ClearPEM scanner is a dedicated system to perform breast imaging with the ability of measuring DOI, allowing an image spatial resolution close to 1.5 mm. The DOI is measured by calculating the amplitude asymmetry between the signals produced by two APD, one in the top and other in the bottom of the crystal. The DOI resolution measured in laboratory tests is 2.0 mm. In this paper we present a method to periodically confirm this value with the scanner fully mounted. The DOI resolution obtained with this method was 2.8 mm, which is consistent with the resolution measured during the laboratory tests.

Keywords

avalanche photodiodes; biomedical equipment; mammography; positron emission tomography; solid scintillation detectors; APD; ClearPEM scanner; DOI resolution assessment; avalanche photodiodes; breast imaging; dedicated system; depth of interaction; fully mounted PEM scanner; image spatial resolution; positron emission tomography; signal amplitude asymmetry;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE

Conference_Location

Valencia

ISSN

1082-3654

Print_ISBN

978-1-4673-0118-3

Type

conf

DOI

10.1109/NSSMIC.2011.6152607

Filename

6152607