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1.
Calibration of coincidence counting assay of thyroidal iodine-125 by Monte Carlo simulation.
Widman, J C; Powsner, E R.
Phys Med Biol ; 28(4): 427-30, 1983 Apr.
Article in English | MEDLINE | ID: mdl-6856677

Subject(s)
Iodine Radioisotopes/analysis , Thyroid Gland/analysis , Calibration , Humans , Monte Carlo Method , Radiometry/methods
2.
Absorbed fractions for photons of 125I and 129I in the thyroid.
Widman, J C; Powsner, E R; Plato, P A.
Int J Appl Radiat Isot ; 31(7): 421-3, 1980 Jul.
Article in English | MEDLINE | ID: mdl-7429657

Subject(s)
Iodine Radioisotopes , Thyroid Gland/radiation effects , Energy Transfer , Gamma Rays , Humans , Models, Biological , Monte Carlo Method , Radiation Dosage , Radioactivity , Thyroid Gland/anatomy & histology , X-Rays
3.
Long-term clearance of iodine from the thyroid.
Widman, J C; Powsner, E R; Plato, P A.
Int J Appl Radiat Isot ; 31(6): 375-7, 1980 Jun.
Article in English | MEDLINE | ID: mdl-7399734

Subject(s)
Iodine Radioisotopes/metabolism , Thyroid Gland/metabolism , Computers , Half-Life , Humans , Male , Radiation Dosage , Radionuclide Imaging , Thyroid Gland/diagnostic imaging , Time Factors
4.
Monte Carlo advice.
Morin, R L; Raeside, D E; Goin, J E; Widman, J C.
Med Phys ; 6(4): 305-6, 1979.
Article in English | MEDLINE | ID: mdl-481356

ABSTRACT

The generation of long, high quality random number sequences for Monte Carlo simulations using minicomputers is considered. The importance of the thorough testing of Monte Carlo random number generators is emphasized. A recommendation is given to authors of Monte Carlo papers to specify their random number generator and to describe the randomness testing which that generator has undergone.


Subject(s)
Computers , Monte Carlo Method , Operations Research , Radiometry
5.
Red-cell lifetimes calculated from 51Cr red-cell survival data.
Widman, J C; Powsner, E R.
Med Phys ; 1(2): 58-61, 1974.
Article in English | MEDLINE | ID: mdl-4437507

Subject(s)
Erythrocytes , Cell Survival , Chromium Radioisotopes , Erythrocyte Aging , Humans , Time Factors
6.
Radioimmunoassay data handling.
Widman, J C; Powsner, E R.
Am J Clin Pathol ; 60(4): 480-6, 1973 Oct.
Article in English | MEDLINE | ID: mdl-4743793

Subject(s)
Computers , Radioimmunoassay , Binding Sites, Antibody , Binding, Competitive , Digoxin/analysis , Growth Hormone/analysis , Humans , Mathematics , Methods , Thyroxine/analysis , Vitamin B 12/analysis
7.
Internal conversion coefficients for absorbed dose calculations.
Widman, J C; Powsner, E R.
Phys Med Biol ; 15(1): 99-106, 1970 Jan.
Article in English | MEDLINE | ID: mdl-5418327

Subject(s)
Radiotherapy Dosage , Electrons , Mathematics , Radioisotopes
8.
A regulated high voltage supply for portable radiation detectors.
Widman, J C.
Med Biol Eng ; 6(5): 555, 1968 Sep.
Article in English | MEDLINE | ID: mdl-5713526

Subject(s)
Electronics , Radiation Monitoring/instrumentation
9.
Energy absorption in cylinders containing a uniformly distributed source.
Widman, J C; Powsner, E R.
J Nucl Med ; 8(3): 179-86, 1967 Mar.
Article in English | MEDLINE | ID: mdl-6024131

Subject(s)
Radioisotopes , Models, Theoretical , Radiometry
10.
Energy absorption in cylinders containing an axial source.
Widman, J C; Powsner, E R.
J Nucl Med ; 7(6): 407-15, 1966 Jun.
Article in English | MEDLINE | ID: mdl-5940406

Subject(s)
Radioisotopes , Absorption , Mathematics , Physical Phenomena , Physics
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