Monte Carlo computer code to calculate radiation dose from syringes containing radioactive substances
The absorbed dose to tissue surrounding a syringe containing technetium-99m is evaluated with a computer code using Monte Carlo photon-transport techniques. The syringe geometry is represented as a right circular cylinder. The cylindrical symmetry of the absorbed-dose distribution is assumed by calculating the absorbed dose in a volume region shaped like a circular annulus with a square cross section. The deposition of electron energy is assumed to take place at the point where the photon interacts. For a 5-ml syringe containing 3 ml of liquid, the absorbed dose at the midpoint of the liquid region and 0.5 mm from the outer syringe surface was 16.4 mrads per millicurie-minute. This is in good agreement with calculations and measurements reported in the literature. The accuracy of the program was tested by reproducing M. Berger's values of the specific absorbed fractions for the point-isotropic sources in water. The code has been written in a flexible format. Any photon energy or mixture of photon energies, in any proportion, can be used as input to the program. The syringe dimensions and the volume of the liquid (source) region are variable input parameters. This code is intended to be used to produce absorbed-dose results a) for monoenergetic photons, b) for a variety of syringe sizes or source volumes, and c) to evaluate or optimize nonhomogeneous shielding materials such as lead, tungsten, uranium, and combinations of various materials.
- Research Organization:
- Howard Univ., Washington, DC
- OSTI ID:
- 6000013
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 20:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
62 RADIOLOGY AND NUCLEAR MEDICINE
61 RADIATION PROTECTION AND DOSIMETRY
COMPUTER CALCULATIONS
MONTE CARLO METHOD
COMPUTER CODES
C CODES
N CODES
P CODES
S CODES
DOSIMETRY
FINGERS
RADIATION DOSES
HANDS
RADIATION DOSE DISTRIBUTIONS
RADIOPHARMACEUTICALS
TECHNETIUM 99
COMPARATIVE EVALUATIONS
CYLINDRICAL CONFIGURATION
EXPERIMENTAL DATA
ISOLATED VALUES
ISOMERIC NUCLEI
MEDICAL PERSONNEL
MEDICAL SUPPLIES
THEORETICAL DATA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
BODY AREAS
CONFIGURATION
DATA
DATA FORMS
DOSES
DRUGS
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LABELLED COMPOUNDS
LIMBS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PERSONNEL
PROFESSIONAL PERSONNEL
RADIOACTIVE MATERIALS
RADIOISOTOPES
TECHNETIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
560151* - Radiation Effects on Animals- Man
550601 - Medicine- Unsealed Radionuclides in Diagnostics
655003 - Medical Physics- Dosimetry