Ambient Dose Equivalent measured at the Instituto Nacional de Cancerologia Department of Nuclear Medicine

Journal Article · Tue Dec 07 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3531602· OSTI ID:21506975

Avila, O ^[1]; Torres-Ulloa, C L ^[1]; Medina, L A ^[2]; Trujillo-Zamudio, F E ^[3]; Gamboa de Buen, I ^[4]; Buenfil, A E; Brandan, M E ^[2]

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1. Instituto Nacional de Investigaciones Nucleares, AP 18-1027, 11801, DF (Mexico)
2. Instituto de Fisica, Universidad Nacional Autonoma de Mexico, AP 20-364, 01000, DF (Mexico)
3. Instituto Nacional de Cancerologia (INCan), Av. San Fernando 22, C.P. 14080 (Mexico)
4. Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, AP 70-543, 04510 DF (Mexico)

Ambient dose equivalent values were determined in several sites at the Instituto Nacional de Cancerologia, Departmento de Medicina Nuclear, using TLD-100 and TLD-900 thermoluminescent dosemeters. Additionally, ambient dose equivalent was measured at a corridor outside the hospitalization room for patients treated with {sup 137}Cs brachytherapy. Dosemeter calibration was performed at the Instituto Nacional de Investigaciones Nucleares, Laboratorio de Metrologia, to known {sup 137}Cs gamma radiation air kerma. Radionuclides considered for this study are {sup 131}I, {sup 18}F, {sup 67}Ga, {sup 99m}Tc, {sup 111}In, {sup 201}Tl and {sup 137}Cs, with main gamma energies between 93 and 662 keV. Dosemeters were placed during a five month period in the nuclear medicine rooms (containing gamma-cameras), injection corridor, patient waiting areas, PET/CT study room, hot lab, waste storage room and corridors next to the hospitalization rooms for patients treated with {sup 131}I and {sup 137}Cs. High dose values were found at the waste storage room, outside corridor of {sup 137}Cs brachytherapy patients and PET/CT area. Ambient dose equivalent rate obtained for the {sup 137}Cs brachytherapy corridor is equal to (18.51{+-}0.02)x10{sup -3} mSv/h. Sites with minimum doses are the gamma camera rooms, having ambient dose equivalent rates equal to (0.05{+-}0.03)x10{sup -3} mSv/h. Recommendations have been given to the Department authorities so that further actions are taken to reduce doses at high dose sites in order to comply with the ALARA principle (as low as reasonably achievable).

• OSTI ID: 21506975
• Journal Information: AIP Conference Proceedings, Vol. 1310, Issue 1; Conference: 11. Mexican symposium on medical physics, Mexico City (Mexico), 19-22 Mar 2010; Other Information: DOI: 10.1063/1.3531602; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS
62 RADIOLOGY AND NUCLEAR MEDICINE
ALARA
BRACHYTHERAPY
CALIBRATION
CESIUM 137
DOSE EQUIVALENTS
FLUORINE 18
GALLIUM 67
GAMMA CAMERAS
GAMMA RADIATION
INDIUM 111
INJECTION
IODINE 131
KEV RANGE 100-1000
PATIENTS
RADIATION DOSES
TECHNETIUM 99
THALLIUM 201
THERMOLUMINESCENCE
THERMOLUMINESCENT DOSEMETERS
WASTE STORAGE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CAMERAS
CESIUM ISOTOPES
DAYS LIVING RADIOISOTOPES
DOSEMETERS
DOSES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
EMISSION
ENERGY RANGE
FLUORINE ISOTOPES
GALLIUM ISOTOPES
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INDIUM ISOTOPES
INTAKE
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE ISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
LIGHT NUCLEI
LUMINESCENCE
LUMINESCENT DOSEMETERS
MANAGEMENT
MEASURING INSTRUMENTS
MEDICINE
MINUTES LIVING RADIOISOTOPES
NANOSECONDS LIVING RADIOISOTOPES
NUCLEAR MEDICINE
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHOTON EMISSION
RADIATIONS
RADIOISOTOPES
RADIOLOGY
RADIOTHERAPY
STORAGE
TECHNETIUM ISOTOPES
THALLIUM ISOTOPES
THERAPY
WASTE MANAGEMENT
YEARS LIVING RADIOISOTOPES