Kenichi Tanaka

Summary

Affiliation: Sapporo Medical University
Country: Japan

Publications

  1. doi request reprint Development of collimator for in-situ measurement of 90Sr specific activity by β-ray survey meter and Monte Carlo calculation
    Kenichi Tanaka
    Center of Medical Education, Sapporo Medical University, W17, S1, Chuo, Sapporo 060 8556, Japan
    Appl Radiat Isot 77:1-4. 2013
  2. doi request reprint Development of monitoring method of spatial neutron distribution in neutrons-gamma rays mixed field using imaging plate for NCT--depression of the field
    Kenichi Tanaka
    Center of Medical Education, Sapporo Medical University, Chuo Ku, Sapporo, Japan
    Appl Radiat Isot 69:1885-7. 2011
  3. doi request reprint Measurements of neutron distribution in neutrons-gamma-rays mixed field using imaging plate for neutron capture therapy
    Kenichi Tanaka
    Center of Medical Education, Sapporo Medical University, 17, Minami 1 jo, Chuo Ku, Sapporo 060 8556, Japan
    Appl Radiat Isot 68:207-10. 2010
  4. ncbi request reprint A dosimetry study of the Oncoseed 6711 using glass rod dosimeters and EGS5 Monte Carlo code in a geometry lacking radiation equilibrium scatter conditions
    Kenichi Tanaka
    Department of Medicine, Graduate School of Sapporo Medical University, Nishi 17, Minami 1 jo, Chuo Ku, Sapporo 060 8556, Japan
    Med Phys 38:3069-76. 2011
  5. doi request reprint Development of in-situ measurement for 90 Sr specific activity by β-ray survey meter combined with sensitivity correction by Monte Carlo calculation
    Kenichi Tanaka
    School of Medicine, Sapporo Medical University, Nishi 17, Minami 1, Chuo Ku, Sapporo, Japan
    Appl Radiat Isot 69:814-7. 2011
  6. doi request reprint Characteristics of proton beam scanning dependent on Li target thickness from the viewpoint of heat removal and material strength for accelerator-based BNCT
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
    Appl Radiat Isot 67:259-65. 2009
  7. ncbi request reprint Radiation dose estimation by tooth enamel EPR dosimetry for residents of Dolon and Bodene
    Kassym Zhumadilov
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res 47:A47-53. 2006
  8. doi request reprint Measurement of absorbed doses from X-ray baggage examinations to tooth enamel by means of ESR and glass dosimetry
    Kassym Zhumadilov
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima 734 8553, Japan
    Radiat Environ Biophys 47:541-5. 2008
  9. ncbi request reprint Microdosimetric evaluation of secondary particles in a phantom produced by carbon 290 MeV/nucleon ions at HIMAC
    Satoru Endo
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Minami Ku, Hiroshima, Japan
    J Radiat Res 48:397-406. 2007
  10. ncbi request reprint Results of EPR dosimetry for population in the vicinity of the most contaminating radioactive fallout trace after the first nuclear test in the Semipalatinsk test site
    Alexander Ivannikov
    Research Institute for Radiation Biology and Medicine RIRBM, Hiroshima University, Japan
    J Radiat Res 47:A39-46. 2006

Collaborators

Detail Information

Publications29

  1. doi request reprint Development of collimator for in-situ measurement of 90Sr specific activity by β-ray survey meter and Monte Carlo calculation
    Kenichi Tanaka
    Center of Medical Education, Sapporo Medical University, W17, S1, Chuo, Sapporo 060 8556, Japan
    Appl Radiat Isot 77:1-4. 2013
    ..This supports the usability of the manufactured collimators and numerical correction of the sensitivity of the survey meter depending on the geometry...
  2. doi request reprint Development of monitoring method of spatial neutron distribution in neutrons-gamma rays mixed field using imaging plate for NCT--depression of the field
    Kenichi Tanaka
    Center of Medical Education, Sapporo Medical University, Chuo Ku, Sapporo, Japan
    Appl Radiat Isot 69:1885-7. 2011
    ..The depression for the IP in which Gd is replaced with similar amount of B atoms was estimated to be about 10%. The signal intensity for this IP is estimated to be at a similar level with that for Gd-doped IP...
  3. doi request reprint Measurements of neutron distribution in neutrons-gamma-rays mixed field using imaging plate for neutron capture therapy
    Kenichi Tanaka
    Center of Medical Education, Sapporo Medical University, 17, Minami 1 jo, Chuo Ku, Sapporo 060 8556, Japan
    Appl Radiat Isot 68:207-10. 2010
    ..g. the discrepancy of the (157)Gd(n,gamma)(158)Gd reaction rate between measurement and calculation becomes 30% for the photon energy change from 33keV to 1.253MeV...
  4. ncbi request reprint A dosimetry study of the Oncoseed 6711 using glass rod dosimeters and EGS5 Monte Carlo code in a geometry lacking radiation equilibrium scatter conditions
    Kenichi Tanaka
    Department of Medicine, Graduate School of Sapporo Medical University, Nishi 17, Minami 1 jo, Chuo Ku, Sapporo 060 8556, Japan
    Med Phys 38:3069-76. 2011
    ..The aim of this study was to develop a dose calculation method which is applicable to the interseed attenuation and the geometry lacking the equilibrium radiation scatter conditions in brachytherapy...
  5. doi request reprint Development of in-situ measurement for 90 Sr specific activity by β-ray survey meter combined with sensitivity correction by Monte Carlo calculation
    Kenichi Tanaka
    School of Medicine, Sapporo Medical University, Nishi 17, Minami 1, Chuo Ku, Sapporo, Japan
    Appl Radiat Isot 69:814-7. 2011
    ..06 Bq/g evaluated with the imaging plate, which was previously validated. Also, the dependence of the detection efficiency was shown to be an exponential function of the sample thickness and nearly proportional to the area of the sample...
  6. doi request reprint Characteristics of proton beam scanning dependent on Li target thickness from the viewpoint of heat removal and material strength for accelerator-based BNCT
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
    Appl Radiat Isot 67:259-65. 2009
    ..At least 34 ms is estimated to be enough to make a hole on Cu backing plate. A beam shutdown mechanism with a response time of about 20 ms is therefore required...
  7. ncbi request reprint Radiation dose estimation by tooth enamel EPR dosimetry for residents of Dolon and Bodene
    Kassym Zhumadilov
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res 47:A47-53. 2006
    ..1+/-45.5 mGy before 1949 while the younger population received up to about 100 mGy with an average value of 11.5+/-37.7 mGy...
  8. doi request reprint Measurement of absorbed doses from X-ray baggage examinations to tooth enamel by means of ESR and glass dosimetry
    Kassym Zhumadilov
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima 734 8553, Japan
    Radiat Environ Biophys 47:541-5. 2008
    ..As expected, doses from X-ray examinations measured by glass dosimetry were in the microGy range, well below the ESR detection limit and also below the doses measured in enamel samples from residents of the SNTS...
  9. ncbi request reprint Microdosimetric evaluation of secondary particles in a phantom produced by carbon 290 MeV/nucleon ions at HIMAC
    Satoru Endo
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Minami Ku, Hiroshima, Japan
    J Radiat Res 48:397-406. 2007
    ..The RBE of carbon beam had a maximum of 4.5 at the Bragg peak. Downstream of the Bragg peak, the RBE rapidly decreases. The RBE of fragments is dominated by Boron particles around the Bragg peak region...
  10. ncbi request reprint Results of EPR dosimetry for population in the vicinity of the most contaminating radioactive fallout trace after the first nuclear test in the Semipalatinsk test site
    Alexander Ivannikov
    Research Institute for Radiation Biology and Medicine RIRBM, Hiroshima University, Japan
    J Radiat Res 47:A39-46. 2006
    ..25 Gy. These results are in agreement with the pattern of radioactive contamination of the territory after the nuclear test of 1949 except one case of extremely high dose, which should be additionally investigated...
  11. ncbi request reprint Microdosimetric study for secondary neutrons in phantom produced by a 290 MeV/nucleon carbon beam
    Satoru Endo
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima 734 8553, Japan
    Med Phys 34:3571-8. 2007
    ..We can conclude that the treatment dose will not induce serious secondary neutron effects at distances greater than 90 mm from the Bragg peak in carbon particle therapy...
  12. ncbi request reprint Study on influence of X-ray baggage scan on ESR dosimetry for SNTS using human tooth enamel
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res 47:A81-3. 2006
    ..Since ESR dosimetry for SNTS usually has similar errors, the dose by the X-ray scan in this study is concluded to be negligible in ESR dosimetry using tooth enamel from residents near SNTS...
  13. doi request reprint ESR dosimetry study on population of settlements nearby Ust-Kamenogorsk city, Kazakhstan
    Kassym Zhumadilov
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima, 734 8553, Japan
    Radiat Environ Biophys 48:419-25. 2009
    ..For a final conclusion on the radiological situation in this region, the number of samples was too small and, therefore, more work is required to obtain representative results...
  14. ncbi request reprint Characterization of moderator assembly dimension for accelerator boron neutron capture therapy of brain tumors using 7Li(p, n) neutrons at proton energy of 2.5 MeV
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi Minami ku, Hiroshima, 834 8553, Japan
    Med Phys 33:1688-94. 2006
    ..In this process, the values for which the resultant characteristics mentioned above saturate or reverse would be important factors...
  15. ncbi request reprint Characteristics of boron-dose enhancer dependent on dose protocol and 10B concentration for BNCT using near-threshold 7Li(p,n)7Be direct neutrons
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Kasumi, Minami Ku, Hiroshima 734 8553, Japan
    Phys Med Biol 50:167-77. 2005
    ..It was found that the use of BDE becomes unnecessary from the viewpoint of increasing the TPD, when 10B(Tumour) is over a certain level which is decided by the conditions of the dose protocol...
  16. ncbi request reprint Effects of sunlight exposure on the human tooth enamel ESR spectra used for dose reconstruction
    Ling Jiao
    Department of Radiation Biophysics, Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res (Tokyo) 48:21-9. 2007
    ..8 +/- 0.5 mGy (MJ m(-2))(-1), which corresponds to 19.6 +/- 1.3 mGy h(-1) at the latitude of Hiroshima. Signals S2 and S3 may be used to recognize the effect of solar radiation on the enamel...
  17. ncbi request reprint Microdosimetry on a mini-reactor UTR-KINKI for educational uses and biological researches
    Satoru Endo
    Quantum Energy Applications, Graduated School of Engineering, Hiroshima University, 1 4 1, Kagamiyama, Higashi Hiroshima 739 8527, Japan
    J Radiat Res 50:83-7. 2009
    ..3 +/- 0.6 for micronucleated cells in gill cell of Medaka and 4.6 +/- 0.5 for induction of lymphocyte apoptosis in the thymus of ICR mice...
  18. doi request reprint Skin dose from neutron-activated soil for early entrants following the A-bomb detonation in Hiroshima: contribution from beta and gamma rays
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima, 734 8553, Japan
    Radiat Environ Biophys 47:323-30. 2008
    ..It should be noted, however, that the possibility of more extreme exposure scenarios for example for entrants who received much heavier soil contamination on their skin cannot be excluded...
  19. ncbi request reprint Radiation dose measurement by electron spin resonance studies of tooth enamel in lime and non-lime consuming individuals from the Silchar region of northeast India
    Deborshi Bhattacharjee
    Department of Radiation Biophysics, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
    J Radiat Res 50:559-65. 2009
    ..Therefore there is a need for wider studies including consideration of tobacco consumption as well as a larger number of samples for tooth enamel dosimetry...
  20. pmc Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy
    Kenichi Tanaka
    Department of Medicine, Graduate School of Sapporo Medical University, South 1, West 17, Chuo Ward, Sapporo, Hokkaido 060 8556, Japan
    J Radiat Res 55:162-7. 2014
    ..The method proposed is a potential option for reducing the risk of accidental replacements of sources with those of incorrect strengths. ..
  21. doi request reprint Measurement of microdosimetric spectra produced from a 290 MeV/n Spread Out Bragg Peak carbon beam
    Satoru Endo
    Quantum Energy Applications, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima 739 8527, Japan
    Radiat Environ Biophys 49:469-75. 2010
    ..2, 60.95, 64.83, 95.03, 114.79, 124.69, 135.2 and 144.98 mm, respectively) to cover the SOBP (at 60-125 mm depth). The new system can separately determine produced fragments from the incident SOBP carbon beam in a body-simulated phantom...
  22. ncbi request reprint 90Sr concentration in cow teeth from South Ural region, Russia, using Monte Carlo simulation
    Eldana Tieliewuhan
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res 47:A117-20. 2006
    ..83+/-0.08 for a thickness of 1.2+/-0.2 mm. Using these values, 90Sr concentration has been estimated to be 0.11 Bq/g for the thin sample and 0.12 Bq/g for the thick sample, hence they are in good agreement...
  23. doi request reprint Estimation of beta-ray skin dose from exposure to fission fallout from the Hiroshima atomic bomb
    Satoru Endo
    Quantum Energy Applications, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima 739 8527, Japan
    Radiat Prot Dosimetry 149:84-90. 2012
    ..The cumulative skin dose for 1 month after the explosion is taken as the representative value. The estimated skin dose for an initial ¹³⁷Cs deposition of 1 kBq m⁻² was determined to be about 500 mSv...
  24. ncbi request reprint Monte Carlo-based calculation of imaging plate response to (90)Sr in teeth: experimental validation of the required correction on sample thickness
    Kenichi Tanaka
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Hiroshima, Japan
    Radiat Environ Biophys 46:215-20. 2007
    ..Thus, the validity of the proposed numerical method to correct the IP response for sample thickness has successfully been demonstrated...
  25. ncbi request reprint Microdosimetric evaluation of the 400 MeV/nucleon carbon beam at HIMAC
    Satoru Endo
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima 734 8553, Japan
    Med Phys 32:3843-8. 2005
    ..It was observed to rapidly decrease for Bragg peaks occurring at deeper positions in the phantom. The dose from the beam fragments accounted for about 30% to the total dose, however, its contribution to the RBE was less than 17%...
  26. ncbi request reprint Distortion of neutron field during mice irradiation at Kinki University reactor UTR-KINKI
    Satoru Endo
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima 734 8553, Japan
    Appl Radiat Isot 65:1037-40. 2007
    ..The measured variation in dose with respect to the total mouse mass was closely reproduced by the calculation results for neutron and gamma-ray dose. Distortion of the neutron spectrum was observed to occur between 1 keV and 1 MeV...
  27. ncbi request reprint Tooth enamel EPR dosimetry: optimization of EPR spectra recording parameters and effect of sample mass on spectral sensitivity
    Kassym Zhumadilov
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res 46:435-42. 2005
    ..The effect of sample mass on the spectrometer's sensitivity was investigated in order to find out how to make appropriate corrections...
  28. doi request reprint Iodine-129 measurements in soil samples from Dolon village near the Semipalatinsk nuclear test site
    Satoru Endo
    Research Institute for Radiation Biology and Medicine, Hiroshima University, 1 2 3 Kasumi, Minami Ku, Hiroshima, 734 8553, Japan
    Radiat Environ Biophys 47:359-65. 2008
    ..4 +/- 0.4) x 10(13) atoms m(-2) and 0.25 +/- 0.16, respectively. This (129)I/(137)Cs ratio is almost similar to the fission yield ratio for (239)Pu fast fission (0.24)...
  29. ncbi request reprint Nuclear abnormalities in aspirated thyroid cells and chromosome aberrations in lymphocytes of residents near the Semipalatinsk nuclear test site
    Nobuo Takeichi
    Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
    J Radiat Res 47:A171-7. 2006
    ..These results suggest radiation effects both on the chromosomes in peripheral lymphocytes and on the follicular cells in the thyroid...