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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Medical Radiology and radiation safety</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Medical Radiology and radiation safety</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Медицинская радиология и радиационная безопасность</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">1024-6177</issn>
   <issn publication-format="online">2618-9615</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">43740</article-id>
   <article-id pub-id-type="doi">10.12737/1024-6177-2020-65-6-66-72</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Радиационная физика, техника и дозиметрия</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Radiation physics, technology and dosimetry</subject>
    </subj-group>
    <subj-group>
     <subject>Радиационная физика, техника и дозиметрия</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Concerning the Tritium Dose at the Cellular Level</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>К ВОПРОСУ О ДОЗЕ ТРИТИЯ НА КЛЕТОЧНОМ УРОВНЕ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Тимофеев</surname>
       <given-names>Л В</given-names>
      </name>
      <name xml:lang="en">
       <surname>Timofeev</surname>
       <given-names>L V</given-names>
      </name>
     </name-alternatives>
     <bio xml:lang="ru">
      <p>кандидат технических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of technical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Максимов</surname>
       <given-names>А А</given-names>
      </name>
      <name xml:lang="en">
       <surname>Maksimov</surname>
       <given-names>A A</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Кочетков</surname>
       <given-names>О. А.</given-names>
      </name>
      <name xml:lang="en">
       <surname>Kochetkov</surname>
       <given-names>O. A.</given-names>
      </name>
     </name-alternatives>
     <bio xml:lang="ru">
      <p>кандидат технических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of technical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Клочков</surname>
       <given-names>В. Н.</given-names>
      </name>
      <name xml:lang="en">
       <surname>Klochkov</surname>
       <given-names>V. N.</given-names>
      </name>
     </name-alternatives>
     <bio xml:lang="ru">
      <p>доктор технических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of technical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-4"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Федеральный медицинский биофизический центр им. А.И. Бурназяна ФМБА России, Москва</institution>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">A.I. Burnasyan Federal Medical Biophysical Center, Moscow, Russia</institution>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Федеральный медицинский биофизический центр им. А.И. Бурназяна ФМБА России, Москва</institution>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">A.I. Burnasyan Federal Medical Biophysical Center, Moscow, Russia</institution>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Федеральный медицинский биофизический центр им. А.И. Бурназяна ФМБА России</institution>
     <city>Москва</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">A.I. Burnasyan Federal Medical Biophysical Center of FMBA</institution>
     <city>Moscow</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">Федеральный медицинский биофизический центр им. А.И.Бур­на­зяна ФМБА России</institution>
     <city>Москва</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">A.I. Burnasyan Federal Medical Biophysical Center (FMBC) FMBA</institution>
     <city>Moscow</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <volume>65</volume>
   <issue>6</issue>
   <fpage>66</fpage>
   <lpage>72</lpage>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/43740/view">https://zh-szf.ru/en/nauka/article/43740/view</self-uri>
   <abstract xml:lang="ru">
    <p>Цель: Адаптировать метод традиционной расчётной дозиметрии β-излучения НИЗКОЙ энергии (Eмакс ≤ 250 кэВ) к определению дозы облучения биологической клетки и ее структур. Дать предварительную оценку коэффициентов мощности поглощенной дозы для различных соединений трития на клеточном уровне.&#13;
Материал и методы: Для адаптации макроскопического метода β-дозиметрии в область субклеточных структур предложено аппроксимационное выражение для функции точечного источника, полученное Л.В. Тимофеевым, Г.Б. Радзиевским и др.&#13;
Результаты: Предложены аналитические выражения для расчета поглощенной дозы β-излучения в микроструктурах клетки при неравномерном распределении мягких β-излучателей в тканях человека. Для описания неравномерного распределения радиоактивных веществ в клетках введено понятие базисных состояний модели облучаемой клетки. На основе адаптированных аналитических выражений и базисных состояний предложен способ расчета дозы мягких β-излучателей в клетке и её микроструктурах. С помощью предложенной модели получены значения коэффициентов мощности поглощенной дозы для случая концентрирования органических соединений трития (на примере 3H-тимидина) только в ядре клетки (1,8 мГррасп-1) и для случая равномерного распределения оксида трития в клетке (3,510-3 мГррасп-1).&#13;
Заключение: Показано, что метод традиционной расчётной дозиметрии β-излучения мягкой энергии может быть применен для определения дозы облучения биологической клетки и клеточных структур. Предложенную методологию предполагается использовать в дальнейшем при построении на основе экспериментальных данных модели формирования дозы облучения клетки тритием.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Purpose:  To adapt traditional method of soft beta emitters’ dose calculation to the individual biological cells, to estimate the value of absorbed dose-rate factors for different tritium compounds on a cellular level.&#13;
Material and methods: Approximation for point-source function obtained by L.V. Timofeev, G.B. Radzievsky et al. was used to adapt macroscopic beta-particle dosimetry methods to the area of subcellular structures.&#13;
Results:  Using the introduced concept of irradiated cell model base states the analytical expressions for absorbed dose in subcellular structures were suggested for non-uniform activity distributions of soft beta emitters in human tissue. The values of absorbed dose-rate factors for the case of organically bounded tritium confined to the nucleus (1.8 mGy/decay for 3H-thymidine) and for the case of tritiated water uniformly distributed throughout tissue (3.510-3 mGy/decay) were obtained.&#13;
Conclusion: It can be assumed that traditional method of soft beta emitters’ dose calculation is adapted to the individual biological cells. The proposed methodology is supposed to be used in the future when constructing, based on experimental data, a biokinetic model of the intake of tritium organic compounds in the human body.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>микродозиметрия</kwd>
    <kwd>дозиметрия внутреннего облучения</kwd>
    <kwd>мягкое бета-излучение</kwd>
    <kwd>тритий</kwd>
    <kwd>функция точечного источника</kwd>
    <kwd>распределение поглощенной дозы</kwd>
    <kwd>биологическая клетка</kwd>
    <kwd>клеточное ядро</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>microdosimetry</kwd>
    <kwd>dosimetry of internal irradiation</kwd>
    <kwd>soft beta emitters</kwd>
    <kwd>tritium</kwd>
    <kwd>point-source function</kwd>
    <kwd>absorbed-dose distribution</kwd>
    <kwd>biological cell</kwd>
    <kwd>cell nucleus</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
  <p></p>
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