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Estimation of the conversion coefficients from dose-area product to effective dose for barium meal examinations for adult patients

Vodovatov, Aleksandr V. LU ; Golikov, Vladislav Yu; Kamyshanskaya, Irina G.; Zinkevich, Kseniya V. and Bernhardsson, Christian LU (2018) In Radiatsionnaya Gygiena 11(1). p.93-100
Abstract

Fluoroscopic examinations of the upper gastro-intestinal tract and, especially, barium meal examinations, are commonly performed in a majority of hospitals. These examinations are associated both with substantial individual patient doses and contribution to the collective dose from medical exposure. Effective dose estimation for this type of examinations is complicated due to: 1) the necessity to simulate the moving X-ray irradiation field; 2) differences in study structure for the individual patients; 3) subjectivity of the operators; and 4) differences in the X-ray equipment. The aim of the current study was to estimate conversion coefficients from dose-area product to effective dose for barium meal examinations for the over couch and... (More)

Fluoroscopic examinations of the upper gastro-intestinal tract and, especially, barium meal examinations, are commonly performed in a majority of hospitals. These examinations are associated both with substantial individual patient doses and contribution to the collective dose from medical exposure. Effective dose estimation for this type of examinations is complicated due to: 1) the necessity to simulate the moving X-ray irradiation field; 2) differences in study structure for the individual patients; 3) subjectivity of the operators; and 4) differences in the X-ray equipment. The aim of the current study was to estimate conversion coefficients from dose-area product to effective dose for barium meal examinations for the over couch and under couch exposure conditions. The study was based on data collected in the X-ray unit of the surgical department of the St-Petersburg Mariinsky hospital. A model of patient exposure during barium meal examination was developed based on the collected data on fluoroscopy protocols and adult patient irradiation geometry. Conversion coefficients were calculated using PCXMC 2.0 software. Complete examinations were converted into a set of typical fluoroscopy phases and X-ray images, specified by the examined anatomical region and the projection of patient exposure. Conversion coefficients from dose-area product to effective dose were calculated for each phase of the examination and for the complete examination. The resulting values of the conversion coefficients are comparable with published data. Variations in the absolute values of the conversion coefficients can be explained by differences in clinical protocols, models for the estimation of the effective dose and parameters of barium meal examinations. The proposed approach for estimation of effective dose considers such important features of fluoroscopic examinations as: 1) non-uniform structure of examination, 2) significant movement of the X-ray tube within a single fluoroscopic phase, and 3) the variety of exposure geometries within complete examination.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Barium meal, Conversion coefficients., Effective dose, Fluoroscopy
in
Radiatsionnaya Gygiena
volume
11
issue
1
pages
8 pages
publisher
Saint-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev
external identifiers
  • scopus:85046095164
ISSN
1998-426X
language
English
LU publication?
yes
id
1f4f24c6-157f-4622-8ded-86613b412df0
date added to LUP
2018-05-15 15:19:33
date last changed
2018-05-29 10:23:13
@article{1f4f24c6-157f-4622-8ded-86613b412df0,
  abstract     = {<p>Fluoroscopic examinations of the upper gastro-intestinal tract and, especially, barium meal examinations, are commonly performed in a majority of hospitals. These examinations are associated both with substantial individual patient doses and contribution to the collective dose from medical exposure. Effective dose estimation for this type of examinations is complicated due to: 1) the necessity to simulate the moving X-ray irradiation field; 2) differences in study structure for the individual patients; 3) subjectivity of the operators; and 4) differences in the X-ray equipment. The aim of the current study was to estimate conversion coefficients from dose-area product to effective dose for barium meal examinations for the over couch and under couch exposure conditions. The study was based on data collected in the X-ray unit of the surgical department of the St-Petersburg Mariinsky hospital. A model of patient exposure during barium meal examination was developed based on the collected data on fluoroscopy protocols and adult patient irradiation geometry. Conversion coefficients were calculated using PCXMC 2.0 software. Complete examinations were converted into a set of typical fluoroscopy phases and X-ray images, specified by the examined anatomical region and the projection of patient exposure. Conversion coefficients from dose-area product to effective dose were calculated for each phase of the examination and for the complete examination. The resulting values of the conversion coefficients are comparable with published data. Variations in the absolute values of the conversion coefficients can be explained by differences in clinical protocols, models for the estimation of the effective dose and parameters of barium meal examinations. The proposed approach for estimation of effective dose considers such important features of fluoroscopic examinations as: 1) non-uniform structure of examination, 2) significant movement of the X-ray tube within a single fluoroscopic phase, and 3) the variety of exposure geometries within complete examination.</p>},
  author       = {Vodovatov, Aleksandr V. and Golikov, Vladislav Yu and Kamyshanskaya, Irina G. and Zinkevich, Kseniya V. and Bernhardsson, Christian},
  issn         = {1998-426X},
  keyword      = {Barium meal,Conversion coefficients.,Effective dose,Fluoroscopy},
  language     = {eng},
  month        = {01},
  number       = {1},
  pages        = {93--100},
  publisher    = {Saint-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev},
  series       = {Radiatsionnaya Gygiena},
  title        = {Estimation of the conversion coefficients from dose-area product to effective dose for barium meal examinations for adult patients},
  volume       = {11},
  year         = {2018},
}