Abstract
When performing computed tomography examinations the exposure factors are hardly ever adapted to the patient's size. One reason for that might be the lack of simple methods. In this report the computer programme OmnimAs is described which is calculating how the exposure factors should be varied together with the patient's perimeter (which easily can be measured with a measuring tape). The first approximation is to calculate the exposure values giving the same noise levels in the image irrespective the patient's size. A clinical evaluation has shown that this relationship has to be modified. One chapter is describing the physical background behind the programme. Results calculated with OmnimAs are in good agreement with a number of published studies. Clinical experiences are showing the usability of OmnimAs. Finally the correlation between several parameters and image quality/dose is discussed and how this correlation can be made use of for optimising CT-examinations.
Nyman, Ulf;
Kristiansson, Mattias;
[1]
Leitz, Wolfram;
[2]
Paahlstorp, Per-Aake
[3]
- Trelleborg Hospital (Sweden)
- Swedish Radiation Protection Authority, Stockholm (Sweden)
- Siemens Medical Solutions, Solna (Sweden)
Citation Formats
Nyman, Ulf, Kristiansson, Mattias, Leitz, Wolfram, and Paahlstorp, Per-Aake.
Adaption of the radiation dose for computed tomography of the body - back-ground for the dose adaption programme OmnimAs; Straaldosreglering vid kroppsdatortomografi - bakgrund till dosregleringsprogrammet OmnimAs.
Sweden: N. p.,
2004.
Web.
Nyman, Ulf, Kristiansson, Mattias, Leitz, Wolfram, & Paahlstorp, Per-Aake.
Adaption of the radiation dose for computed tomography of the body - back-ground for the dose adaption programme OmnimAs; Straaldosreglering vid kroppsdatortomografi - bakgrund till dosregleringsprogrammet OmnimAs.
Sweden.
Nyman, Ulf, Kristiansson, Mattias, Leitz, Wolfram, and Paahlstorp, Per-Aake.
2004.
"Adaption of the radiation dose for computed tomography of the body - back-ground for the dose adaption programme OmnimAs; Straaldosreglering vid kroppsdatortomografi - bakgrund till dosregleringsprogrammet OmnimAs."
Sweden.
@misc{etde_20564035,
title = {Adaption of the radiation dose for computed tomography of the body - back-ground for the dose adaption programme OmnimAs; Straaldosreglering vid kroppsdatortomografi - bakgrund till dosregleringsprogrammet OmnimAs}
author = {Nyman, Ulf, Kristiansson, Mattias, Leitz, Wolfram, and Paahlstorp, Per-Aake}
abstractNote = {When performing computed tomography examinations the exposure factors are hardly ever adapted to the patient's size. One reason for that might be the lack of simple methods. In this report the computer programme OmnimAs is described which is calculating how the exposure factors should be varied together with the patient's perimeter (which easily can be measured with a measuring tape). The first approximation is to calculate the exposure values giving the same noise levels in the image irrespective the patient's size. A clinical evaluation has shown that this relationship has to be modified. One chapter is describing the physical background behind the programme. Results calculated with OmnimAs are in good agreement with a number of published studies. Clinical experiences are showing the usability of OmnimAs. Finally the correlation between several parameters and image quality/dose is discussed and how this correlation can be made use of for optimising CT-examinations.}
place = {Sweden}
year = {2004}
month = {Nov}
}
title = {Adaption of the radiation dose for computed tomography of the body - back-ground for the dose adaption programme OmnimAs; Straaldosreglering vid kroppsdatortomografi - bakgrund till dosregleringsprogrammet OmnimAs}
author = {Nyman, Ulf, Kristiansson, Mattias, Leitz, Wolfram, and Paahlstorp, Per-Aake}
abstractNote = {When performing computed tomography examinations the exposure factors are hardly ever adapted to the patient's size. One reason for that might be the lack of simple methods. In this report the computer programme OmnimAs is described which is calculating how the exposure factors should be varied together with the patient's perimeter (which easily can be measured with a measuring tape). The first approximation is to calculate the exposure values giving the same noise levels in the image irrespective the patient's size. A clinical evaluation has shown that this relationship has to be modified. One chapter is describing the physical background behind the programme. Results calculated with OmnimAs are in good agreement with a number of published studies. Clinical experiences are showing the usability of OmnimAs. Finally the correlation between several parameters and image quality/dose is discussed and how this correlation can be made use of for optimising CT-examinations.}
place = {Sweden}
year = {2004}
month = {Nov}
}