Investigation of signal fading in lithium formate EPR dosimeters using a new sensitive method

被引：15

作者：

Adolfsson, Emelie ^{[1
]}

Karlsson, Mattias ^{[1
]}

Carlsson, Gudrun Alm ^{[1
]}

Tedgren, Asa Carlsson ^{[1
,2
]}

Lund, Eva ^{[1
]}

Olsson, Sara ^{[3
]}

Gustafsson, Hakan ^{[1
]}

机构：

[1] Linkoping Univ, Dept Med & Hlth Sci IMH, SE-58185 Linkoping, Sweden

[2] Swedish Radiat Safety Author, SE-17116 Stockholm, Sweden

[3] Cent Hosp Vaxjo, SE-35185 Vaxjo, Sweden

来源：

PHYSICS IN MEDICINE AND BIOLOGY | 2012年 / 57卷 / 08期

关键词：

SYSTEM; ADVANCEMENTS; ACCURACY; BRACHYTHERAPY; RADIOTHERAPY;

D O I：

10.1088/0031-9155/57/8/2209

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The aim of this study was to investigate signal fading in lithium formate electron paramagnetic resonance (EPR) dosimeters used for clinical applications in radiotherapy. A new experimental method for determination of signal fading, designed to resolve small changes in signal from slowly decaying unstable radicals, was used. Possible signal fading in lithium formate due to different storage temperatures was also tested. Air humidity was kept at a constant level of 33% throughout the experiments. The conclusion drawn from the investigations was that the EPR signal from lithium formate is stable during at least 1 month after irradiation and is not sensitive to variations in storage temperature <40 degrees C when kept at a relative air humidity of 33%. This makes lithium formate a suitable dosimeter for transfer dosimetry in clinical audits.

引用

页码：2209 / 2217

页数：9

共 15 条

[1] Response of lithium formate EPR dosimeters at photon energies relevant to the dosimetry of brachytherapy
Adolfsson, Emelie
Carlsson, Gudrun Alm
Grindborg, Jan-Erik
Gustafsson, Hakan
Lund, Eva
Tedgren, Asa Carlsson
[J]. MEDICAL PHYSICS, 2010, 37 (09) : 4946 - 4959
[2] [Anonymous], 2008, EVALUATION MEASUREME
[3] Development of a secondary standard for the absorbed dose to water based on the alanine EPR dosimetry system
Anton, M
[J]. APPLIED RADIATION AND ISOTOPES, 2005, 62 (05) : 779 - 795
[4] Evaluation of a lithium formate EPR dosimetry system for dose measurements around 192Ir brachytherapy sources
Antonovic, Laura
Gustafsson, Hakan
Carlsson, Gudrun Alm
Tedgren, Asa Carlsson
[J]. MEDICAL PHYSICS, 2009, 36 (06) : 2236 - 2247
[5] Transferability of ASTM/NIST alanine-polyethylene recipe at ISS
De Angelis, C
Fattibene, P
Onori, S
Petetti, E
Bartolotta, A
Santamaria, AS
[J]. APPLIED RADIATION AND ISOTOPES, 2000, 52 (05) : 1197 - 1201
[6] Lithium formate EPR dosimetry for verifications of planned dose distributions prior to intensity-modulated radiation therapy
Gustafsson, H.
Lund, E.
Olsson, S.
[J]. PHYSICS IN MEDICINE AND BIOLOGY, 2008, 53 (17) : 4667 - 4682
[7] Gustafsson H., 2008, THESIS LINKOPING U L
[8] Hodgman CharlesD., 1960, Handbook of chemistry and physics, Vforty-second
[9] The IAEA/WHO TLD postal programme for radiotherapy hospitals
Izewska, J
Andreo, P
[J]. RADIOTHERAPY AND ONCOLOGY, 2000, 54 (01) : 65 - 72
[10] An ESR and ENDOR study of irradiated 6Li-formate
Komaguchi, K.
Matsubara, Y.
Shiotani, M.
Gustafsson, H.
Lund, E.
Lund, A.
[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2007, 66 (03) : 754 - 760

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