Realistic computerized human phantoms.

To estimate the risk resulting from exposures to ionizing radiation, the organ and tissue doses should be assessed. A convenient method is the calculation of these doses using representations of the human body, called models or phantoms, together with computer codes simulating the transport of radiation in the body. Most commonly used are mathematical phantoms whose external and internal volumes are defined by simple geometric bodies. More recently, phantoms constructed from computed tomographic data of real persons were introduced as an improvement. These phantoms present advantages concerning the location and shape of the organs, in particular the hard bone and bone marrow, whose distribution can be assessed with high resolution. So far, three of these phantoms were constructed at the GSF, a fourth is under process. The construction technique is described, and some calculational results of organ doses due to external photon irradiation are presented.

[1]  T. S. Chen,et al.  Patient risk from intraoral dental radiography. , 1988, Dento maxillo facial radiology.

[2]  M. Zankl,et al.  Influence of Patient Size on Organ Doses in Diagnostic Radiology , 1992 .

[3]  W Abmayr,et al.  The calculations of dose from external photon exposures using reference and realistic human phantoms and Monte Carlo methods , 1986 .

[4]  L. Lanzl,et al.  An instrumented phantom system for analog computation of treatment plans. , 1962, The American journal of roentgenology, radium therapy, and nuclear medicine.

[5]  W. McDavid,et al.  Patient risk from rotational panoramic radiography. , 1988, Dento maxillo facial radiology.

[6]  T. S. Chen,et al.  Patient risk from interproximal radiography. , 1984, Oral surgery, oral medicine, and oral pathology.

[7]  M. Zankl,et al.  Variation of Organ Doses in Paediatric Radiology due to Patient Diameter, Calculated with Phantoms of Varying Voxel Size , 1993 .

[8]  R. Sievert,et al.  Book Reviews : Recommendations of the International Commission on Radiological Protection (as amended 1959 and revised 1962). I.C.R.P. Publication 6. 70 pp. PERGAMON PRESS. Oxford, London and New York, 1964. £1 5s. 0d. [TB/54] , 1964 .

[9]  K. F. Eckerman,et al.  Specific absorbed fractions of energy at various ages from internal photon sources: 6, Newborn , 1987 .

[10]  G. G. Warner,et al.  Mathematical descriptions of a one- and five-year old child for use in dosimetry calculations , 1976 .

[11]  B. Wall,et al.  Organ Doses from Medical X-Ray Examinations Calculated Using Monte Carlo Techniques , 1985 .

[12]  H. M. Parker,et al.  Radiation Quantities and Units , 1972 .

[13]  J.M.L. Hwang,et al.  Mathematical description of a newborn human for use in dosimetry calculations , 1976 .

[14]  M. Zankl,et al.  Vergleich berechneter und gemessener Dosen an einem anthropomorphen Phantom , 1992 .

[15]  Icru.,et al.  Phantoms and Computational Models in Therapy, Diagnosis and Protection , 1992 .

[16]  Icrp.  1990 Recommendations of the International Commission on Radiological Protection , 1991 .

[17]  G Drexler,et al.  The construction of computer tomographic phantoms and their application in radiology and radiation protection , 1988, Radiation and environmental biophysics.

[18]  Kimiaki Saito,et al.  Organ Doses for Foetuses, Babies, Children and Adults from Environmental Gamma Rays , 1991 .

[19]  Marvin Rosenstein,et al.  Organ doses in diagnostic radiology , 1976 .

[20]  W. S. Snyder,et al.  DISTRIBUTION OF DOSE IN THE BODY FROM A SOURCE OF GAMMA RAYS DISTRIBUTED UNIFORMLY IN AN ORGAN. , 1968 .

[21]  T. S. Chen,et al.  Radiation doses to sensitive organs from intraoral dental radiography. , 1987, Dento maxillo facial radiology.

[22]  W. S. Snyder,et al.  Estimates of absorbed fractions for monoenergetic photon sources uniformly distributed in various organs of a heterogeneous phantom. , 1974, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.