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SUMMARY:Experimental study of the possibility of 3D localization of the co
 mpact gamma sources in soft tissues
DTSTART;VALUE=DATE-TIME:20151010T081500Z
DTEND;VALUE=DATE-TIME:20151010T083000Z
DTSTAMP;VALUE=DATE-TIME:20260719T065521Z
UID:indico-contribution-427@cern.ch
DESCRIPTION:Speakers: Anastasia Berdnikova (NRNU MEPhI)\nTo determine the 
 depth of the area of radiopharmaceutical accumulation a method of simultan
 eous recording of two lines of gamma rays of different energies and quanti
 tative comparison of the intensity of these lines on the surface of the pa
 tient's body is provided. Since the coefficient of linear absorption of ga
 mma radiation in the medium depends not only on the characteristics of the
  medium\, but also on the gamma radiation energy\, the intensity of gammas
  of different energies is attenuated differently after passing through the
  same absorber layer (soft tissues). Thus\, the quantitative comparison of
  the relative intensities of gamma lines on the surface of the patient's b
 ody allows to determine the depth of area of the accumulation of the radio
 pharmaceutical. The result is achieved by analyzing the energy spectrum of
  the source\, obtained with a scintillation detector or a semiconductor sp
 ectrometer\, by the quantitative analysis of the absorption peaks of the r
 adioisotope. The most widely used medical radioisotope technetium-99m has 
 two gamma-lines - 140 keV and 18 keV\, which allows one to apply the propo
 sed method to search for the sentinel lymph nodes and non-palpable maligna
 nt tumors in the soft tissues.\n\nhttps://indico.particle.mephi.ru/event/2
 /contributions/427/
LOCATION:Milan Hotel 4* Bellini
URL:https://indico.particle.mephi.ru/event/2/contributions/427/
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