Calculation of Patient Doses Using a Human Voxel Phantom of Variable Diameter

Zankl, M.; Panzer, W.; Herrmann, Clemens

doi:10.1093/oxfordjournals.rpd.a033108

Cited by 20 publications

(12 citation statements)

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“…In the field of diagnostic radiology, Golem was used for the dosimetric part of an EU research project [35]. A risk-related dose quantity, H Golem , was evaluated using calculated organ equivalent dose conversion coefficients and entrance air kerma values measured during clinical chest PA and lumbar spine AP examinations which were performed under varying technical examination parameters.…”

Section: Selected Dosimetric Resultsmentioning

confidence: 99%

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The adult male voxel model ”Golem" segmented from whole-body CT patient data

Zankl¹,

Wittmann²

2001

Radiation and Environmental Biophysics

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181

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This paper describes the construction of an adult male voxel model named "Golem" intended to be used for Monte Carlo simulations to calculate dosimetric quantities for radiation protection considerations. The model was segmented from whole-body medical image data of a living person who was 38 years old and had external dimensions close to those of the ICRP Reference Man. The segmentation process using dedicated image processing hard- and software is described and the resulting model is characterised with respect to weight and height of the total body, organ and tissue masses and red bone marrow distribution. A comparison with the respective data for ICRP Reference Man and three further voxel models is presented. Golem was found to agree reasonably well with Reference Man, so that he can be used for the assessment of "representative" body doses.

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Section: Selected Dosimetric Resultsmentioning

confidence: 99%

“…The resulting body model (which was first mentioned in [33]) will be characterised and results from various studies employing this model [34,35,36,37,38] will be briefly summarised.…”

Section: Maria Zankl · Alfred Wittmannmentioning

confidence: 99%

The adult male voxel model ”Golem" segmented from whole-body CT patient data

Zankl¹,

Wittmann²

2001

Radiation and Environmental Biophysics

Self Cite

181

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“…The Monte Carlo technique and voxel simulators had been applied previously to the problem of dose calculations (Veit et al 1989, Zankl et al 2000. The program was previously The 'Visual Monte-Carlo' software (VMC) transports photons through the voxel simulator and reports the absorbed dose received by each organ and tissue relevant to the calculation of effective dose as defined in ICRP Publication 60 (1991).…”

Section: Computational Methods Through the 'Visual Monte-carlo' Softw...mentioning

confidence: 99%

Dose reconstruction of a Brazilian industrial gamma radiography partial-body overexposure case

et al. 2005

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In May 2000, an operator of a (60)Co industrial gamma radiography apparatus, during a routine service, was involved in a partial-body radiological accident, which caused serious injuries to his left hand. Dose reconstruction was started aiming to assess the radiation doses, in order to assist the medical staff in the evaluation and prescription of suitable medical procedures for the patient's treatment and follow-up. This work presents the dose reconstruction used for assessment of the distribution of doses on the patient's left hand, which was made using two methods: physical and computational techniques. For the first technique a physical hand simulator was built. The computational method was performed using microcomputer software for external dose calculations, named 'Visual Monte-Carlo-VMC', together with a hand voxel simulator. The values obtained through both methods for the distribution of absorbed doses on the operator's left hand were compared. About half of them were similar within a range of uncertainty of 20%.

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“…Chou et al also used the ORNL phantom series to calculate dose coefficients for external photon radiation [13] and neutrons [14] over extensive energy ranges. The first voxel pediatric phantoms [15] were developed by German Research Center for Environmental Health (HMGU) (formerly GSF) and utilised in dosimetry for internal radiation sources [16], environmental exposure [15,[17][18][19], and medical radiation exposures [20][21][22][23]. The HMGU voxel phantoms were then followed by Caon et al [24].…”

Section: Introductionmentioning

confidence: 99%

Dose coefficients for ICRP reference pediatric phantoms exposed to idealised external gamma fields

et al. 2017

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Organ and effective dose coefficients have been calculated for the International Commission on Radiological Protection (ICRP) reference pediatric phantoms externally exposed to mono-energetic photon radiation (X- and gamma-rays) from 0.01 – 20 MeV. Calculations used Monte Carlo radiation transport techniques. Organ dose coefficients, i.e., organ absorbed dose per unit air kerma (Gy/Gy), were calculated for 28 organs and tissues including the active marrow (or red bone marrow) for 10 phantoms (newborn, 1-year, 5-year, 10-year, and 15-year old male and female). Radiation exposure was simulated for 33 photon mono-energies (0.01 – 20 MeV) in six irradiation geometries: Antero-Posterior (AP), Postero-Anterior (PA), Right Lateral (RLAT), Left Lateral (LLAT), Rotational (ROT), and Isotropic (ISO). Organ dose coefficients for different ages closely agree in AP geometry as illustrated by a small coefficient of variation (COV) (the ratio of the standard deviation to the mean) of 4.4% for the lungs. The small COVs shown for the effective dose and AP irradiation geometry reflect that most of the radiosensitive organs are located in the front part of the human body. In contrast, we observed differences in organ dose coefficients across the ages of the phantoms for lateral irradiation geometries. We also observed variation in dose coefficients across different irradiation geometries, where the COV ranges from 18% (newborn male) to 38% (15-year-old male) across idealised whole body irradiation geometries for the major organs (active marrow, colon, lung, stomach wall, and breast) at the energy of 0.1 MeV. Effective dose coefficients were also derived for applicable situations, e.g., radiation protection or risk projection. Our results are the first comprehensive set of organ and effective dose coefficients applicable to children and adolescents based on the newly adopted ICRP pediatric phantom series. Our tabulated organ and effective dose coefficients for these next-generation phantoms should provide more accurate estimates of organ doses in children than earlier dosimetric models allowed.

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Calculation of Patient Doses Using a Human Voxel Phantom of Variable Diameter

Cited by 20 publications

References 0 publications

The adult male voxel model ”Golem" segmented from whole-body CT patient data

The adult male voxel model ”Golem" segmented from whole-body CT patient data

Dose reconstruction of a Brazilian industrial gamma radiography partial-body overexposure case

Dose coefficients for ICRP reference pediatric phantoms exposed to idealised external gamma fields

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