Kostyleva, D ; Purushothaman, S ; Dendooven, P ; Haettner, E ; Geissel, H ; Ozoemelam, I ; Schuy, C ; Weber, U ; Boscolo, D ; Dickel, T ; Drozd, V ; Graeff, C ; Franczak, B ; Hornung, C ; Horst, F ; Kazantseva, E ; Kuzminchuk-Feuerstein, N ; Mukha, I ; Nociforo, C ; Pietri, S ; Reidel, C A ; Roesch, H ; Tanaka, Y K ; Weick, H ; Zhao, J ; Durante, M ; Parodi, K ; Scheidenberger, C (2022)
Precision of the PET activity range during irradiation with ¹⁰C, ¹¹C, and ¹²C beams.
In: Physics in Medicine & Biology, 68 (1)
doi: 10.1088/1361-6560/aca5e8
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Objective. Beams of stable ions have been a well-established tool for radiotherapy for many decades. In the case of ion beam therapy with stable ¹²C ions, the positron emitters ¹⁰,¹¹C are produced via projectile and target fragmentation, and their decays enable visualization of the beam via positron emission tomography (PET). However, the PET activity peak matches the Bragg peak only roughly and PET counting statistics is low. These issues can be mitigated by using a short-lived positron emitter as a therapeutic beam. Approach. An experiment studying the precision of the measurement of ranges of positron-emitting carbon isotopes by means of PET has been performed at the FRS fragment-separator facility of GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany. The PET scanner used in the experiment is a dual-panel version of a Siemens Biograph mCT PET scanner. Main results. High-quality in-beam PET images and activity distributions have been measured from the in-flight produced positron emitting isotopes ¹¹C and ¹⁰C implanted into homogeneous PMMA phantoms. Taking advantage of the high statistics obtained in this experiment, we investigated the time evolution of the uncertainty of the range determined by means of PET during the course of irradiation, and show that the uncertainty improves with the inverse square root of the number of PET counts. The uncertainty is thus fully determined by the PET counting statistics. During the delivery of 1.6 × 10⁷ ions in 4 spills for a total duration of 19.2 s, the PET activity range uncertainty for ¹⁰C, ¹¹C and ¹²C is 0.04 mm, 0.7 mm and 1.3 mm, respectively. The gain in precision related to the PET counting statistics is thus much larger when going from ¹¹C to ¹⁰C than when going from ¹²C to ¹¹C. The much better precision for ¹⁰C is due to its much shorter half-life, which, contrary to the case of ¹¹C, also enables to include the in-spill data in the image formation. Significance. Our results can be used to estimate the contribution from PET counting statistics to the precision of range determination in a particular carbon therapy situation, taking into account the irradiation scenario, the required dose and the PET scanner characteristics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Kostyleva, D ; Purushothaman, S ; Dendooven, P ; Haettner, E ; Geissel, H ; Ozoemelam, I ; Schuy, C ; Weber, U ; Boscolo, D ; Dickel, T ; Drozd, V ; Graeff, C ; Franczak, B ; Hornung, C ; Horst, F ; Kazantseva, E ; Kuzminchuk-Feuerstein, N ; Mukha, I ; Nociforo, C ; Pietri, S ; Reidel, C A ; Roesch, H ; Tanaka, Y K ; Weick, H ; Zhao, J ; Durante, M ; Parodi, K ; Scheidenberger, C |
| Art des Eintrags: | Bibliographie |
| Titel: | Precision of the PET activity range during irradiation with ¹⁰C, ¹¹C, and ¹²C beams |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physics in Medicine & Biology |
| Jahrgang/Volume einer Zeitschrift: | 68 |
| (Heft-)Nummer: | 1 |
| Kollation: | 15 Seiten |
| DOI: | 10.1088/1361-6560/aca5e8 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Objective. Beams of stable ions have been a well-established tool for radiotherapy for many decades. In the case of ion beam therapy with stable ¹²C ions, the positron emitters ¹⁰,¹¹C are produced via projectile and target fragmentation, and their decays enable visualization of the beam via positron emission tomography (PET). However, the PET activity peak matches the Bragg peak only roughly and PET counting statistics is low. These issues can be mitigated by using a short-lived positron emitter as a therapeutic beam. Approach. An experiment studying the precision of the measurement of ranges of positron-emitting carbon isotopes by means of PET has been performed at the FRS fragment-separator facility of GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany. The PET scanner used in the experiment is a dual-panel version of a Siemens Biograph mCT PET scanner. Main results. High-quality in-beam PET images and activity distributions have been measured from the in-flight produced positron emitting isotopes ¹¹C and ¹⁰C implanted into homogeneous PMMA phantoms. Taking advantage of the high statistics obtained in this experiment, we investigated the time evolution of the uncertainty of the range determined by means of PET during the course of irradiation, and show that the uncertainty improves with the inverse square root of the number of PET counts. The uncertainty is thus fully determined by the PET counting statistics. During the delivery of 1.6 × 10⁷ ions in 4 spills for a total duration of 19.2 s, the PET activity range uncertainty for ¹⁰C, ¹¹C and ¹²C is 0.04 mm, 0.7 mm and 1.3 mm, respectively. The gain in precision related to the PET counting statistics is thus much larger when going from ¹¹C to ¹⁰C than when going from ¹²C to ¹¹C. The much better precision for ¹⁰C is due to its much shorter half-life, which, contrary to the case of ¹¹C, also enables to include the in-spill data in the image formation. Significance. Our results can be used to estimate the contribution from PET counting statistics to the precision of range determination in a particular carbon therapy situation, taking into account the irradiation scenario, the required dose and the PET scanner characteristics. |
| Freie Schlagworte: | particle therapy, radioactive ion beams, carbon ions, PET, range verification |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin, Gesundheit |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM) 05 Fachbereich Physik > Institut für Kernphysik |
| Hinterlegungsdatum: | 02 Aug 2024 12:52 |
| Letzte Änderung: | 02 Aug 2024 12:52 |
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Verfügbare Versionen dieses Eintrags
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Precision of the PET activity range during irradiation with ¹⁰C, ¹¹C, and ¹²C beams. (deposited 26 Mai 2023 12:12)
- Precision of the PET activity range during irradiation with ¹⁰C, ¹¹C, and ¹²C beams. (deposited 02 Aug 2024 12:52) [Gegenwärtig angezeigt]
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