Development and evaluation of a dose planning system for radiation therapy

Dissertation

Jari Viitanen

Research output: ThesisDissertationMonograph

2 Citations (Scopus)

Abstract

In cancer treatment radiation therapy is one of the most important treatment methods.This study discusses the development and evaluation of a new radiation therapy dose planning system.Especially, the external photon beam calculation algorithms are described.The radiation beam model of the system developed is based on tabulated depth dose and profile curves.The correction factors due to the use of wedge filters and block beam modifiers are also modelled using tabulated values.Obliquity correction is made by cal culating the ratio of tissue air ratios.Inhomogeneity correction is made by the generalized power law method or the equivalent tissue air ratio method.The system can use digital computerized tomography (CT) images as a patient model. The images are used for patient viewing and target definition, for patient contouring and for calculation of the tissue inhomogeneity correction.The dose planning system developed has been evaluated by using two photon energies of 1.25 MeV (Cobalt 60) and 14 MeV (Microtron MM14 accelerator).The evaluation has been done by comparing the results calculated by the developed system with the results of measurements and simulations.The evaluation shows that the accuracy and the performance of the system meets the clinical requirements.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Tampere University of Technology (TUT)
Supervisors/Advisors
  • Neuvo, Yrjö, Advisor, External person
  • Saranummi, Niilo, Advisor, External person
Award date5 Apr 1989
Place of PublicationEspoo
Publisher
Print ISBNs951-38-3367-4
Publication statusPublished - 1989
MoE publication typeG4 Doctoral dissertation (monograph)

Fingerprint

planning
radiation therapy
dosage
evaluation
inhomogeneity
cobalt 60
air
photon beams
wedges
accelerators
tomography
cancer
filters
requirements
photons
curves
profiles
simulation
energy

Keywords

  • radiation therapy
  • dose planning
  • algorithms
  • tomography

Cite this

Viitanen, J. (1989). Development and evaluation of a dose planning system for radiation therapy: Dissertation. Espoo: VTT Technical Research Centre of Finland.
Viitanen, Jari. / Development and evaluation of a dose planning system for radiation therapy : Dissertation. Espoo : VTT Technical Research Centre of Finland, 1989. 151 p.
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abstract = "In cancer treatment radiation therapy is one of the most important treatment methods.This study discusses the development and evaluation of a new radiation therapy dose planning system.Especially, the external photon beam calculation algorithms are described.The radiation beam model of the system developed is based on tabulated depth dose and profile curves.The correction factors due to the use of wedge filters and block beam modifiers are also modelled using tabulated values.Obliquity correction is made by cal culating the ratio of tissue air ratios.Inhomogeneity correction is made by the generalized power law method or the equivalent tissue air ratio method.The system can use digital computerized tomography (CT) images as a patient model. The images are used for patient viewing and target definition, for patient contouring and for calculation of the tissue inhomogeneity correction.The dose planning system developed has been evaluated by using two photon energies of 1.25 MeV (Cobalt 60) and 14 MeV (Microtron MM14 accelerator).The evaluation has been done by comparing the results calculated by the developed system with the results of measurements and simulations.The evaluation shows that the accuracy and the performance of the system meets the clinical requirements.",
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language = "English",
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Viitanen, J 1989, 'Development and evaluation of a dose planning system for radiation therapy: Dissertation', Doctor Degree, Tampere University of Technology (TUT), Espoo.

Development and evaluation of a dose planning system for radiation therapy : Dissertation. / Viitanen, Jari.

Espoo : VTT Technical Research Centre of Finland, 1989. 151 p.

Research output: ThesisDissertationMonograph

TY - THES

T1 - Development and evaluation of a dose planning system for radiation therapy

T2 - Dissertation

AU - Viitanen, Jari

PY - 1989

Y1 - 1989

N2 - In cancer treatment radiation therapy is one of the most important treatment methods.This study discusses the development and evaluation of a new radiation therapy dose planning system.Especially, the external photon beam calculation algorithms are described.The radiation beam model of the system developed is based on tabulated depth dose and profile curves.The correction factors due to the use of wedge filters and block beam modifiers are also modelled using tabulated values.Obliquity correction is made by cal culating the ratio of tissue air ratios.Inhomogeneity correction is made by the generalized power law method or the equivalent tissue air ratio method.The system can use digital computerized tomography (CT) images as a patient model. The images are used for patient viewing and target definition, for patient contouring and for calculation of the tissue inhomogeneity correction.The dose planning system developed has been evaluated by using two photon energies of 1.25 MeV (Cobalt 60) and 14 MeV (Microtron MM14 accelerator).The evaluation has been done by comparing the results calculated by the developed system with the results of measurements and simulations.The evaluation shows that the accuracy and the performance of the system meets the clinical requirements.

AB - In cancer treatment radiation therapy is one of the most important treatment methods.This study discusses the development and evaluation of a new radiation therapy dose planning system.Especially, the external photon beam calculation algorithms are described.The radiation beam model of the system developed is based on tabulated depth dose and profile curves.The correction factors due to the use of wedge filters and block beam modifiers are also modelled using tabulated values.Obliquity correction is made by cal culating the ratio of tissue air ratios.Inhomogeneity correction is made by the generalized power law method or the equivalent tissue air ratio method.The system can use digital computerized tomography (CT) images as a patient model. The images are used for patient viewing and target definition, for patient contouring and for calculation of the tissue inhomogeneity correction.The dose planning system developed has been evaluated by using two photon energies of 1.25 MeV (Cobalt 60) and 14 MeV (Microtron MM14 accelerator).The evaluation has been done by comparing the results calculated by the developed system with the results of measurements and simulations.The evaluation shows that the accuracy and the performance of the system meets the clinical requirements.

KW - radiation therapy

KW - dose planning

KW - algorithms

KW - tomography

M3 - Dissertation

SN - 951-38-3367-4

T3 - Publications / Technical Research Centre of Finland

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Viitanen J. Development and evaluation of a dose planning system for radiation therapy: Dissertation. Espoo: VTT Technical Research Centre of Finland, 1989. 151 p.