A New Positioning Algorithm for Position-Sensitive Avalanche Photodiodes
We are using a novel position sensitive avalanche photodiode (PSAPD) for the construction of a high resolution positron emission tomography (PET) camera. Up to now most researchers working with PSAPDs have been using an Anger-like positioning algorithm involving the four corner readout signals of th...
| Publié dans: | IEEE transactions on nuclear science. - 1988. - 54(2007), 3 vom: 01. Juni |
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| Auteur principal: | |
| Autres auteurs: | , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2007
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| Accès à la collection: | IEEE transactions on nuclear science |
| Sujets: | Journal Article Avalanche photodiode positioning algorithm positron emission tomography |
| Résumé: | We are using a novel position sensitive avalanche photodiode (PSAPD) for the construction of a high resolution positron emission tomography (PET) camera. Up to now most researchers working with PSAPDs have been using an Anger-like positioning algorithm involving the four corner readout signals of the PSAPD. This algorithm yields a significant non-linear spatial "pin-cushion" distortion in raw crystal positioning histograms. In this paper, we report an improved positioning algorithm, which combines two diagonal corner signals of the PSAPD followed by a 45° rotation to determine the X or Y position of the interaction. We present flood positioning histogram data generated with the old and new positioning algorithms using a 3 × 4 array of 2 × 2 × 3 mm3 and a 3 × 8 array of 1 × 1 × 3 mm3 of LSO crystals coupled to 8 × 8 mm2 PSAPDs. This new algorithm significantly reduces the pin-cushion distortion in raw flood histogram image |
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| Description: | Date Revised 21.10.2021 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 0018-9499 |
| DOI: | 10.1109/TNS.2007.894129 |