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Definition of treatment geometry in radiation therapy

Abstract

When accurate systems for quality assurance and treatment optimization are employed, a precise system for fixation and dosimetric and portal verification are as important as a continued and standardized code of practice for dosimetry and patient follow-up, including registration of tumour responses and acute and late normal tissue reactions. To improve the accuracy of existing dose response relations in order to improve future therapy the treatment geometry and dose delivery concepts have to be accurately defined and uniformly employed. A Nordic working group was set up in 1991 to standardize the concepts and quantities used during the whole radiotherapy process in the Nordic countries. Now the group is finalizing its report ``Specification of Dose Delivery in Radiation Therapy``. The report emphasizes that the treatment geometry shall be consistent with the geometry used during the diagnostic work up. The patient fixation is of importance early in the diagnostic phase to ensure that the same reference points and patients position will be used both during the diagnostic work up, simulation and treatment execution. Reference Coordinate System of the patient is a concept based on defined anatomic reference points. This Patient Reference System is a local system which has validity for the tissues,  More>>
Authors:
Aaltonen, P [1] 
  1. Finnish Centre for Radiation and Nuclear Safety (STUK), Helsinki (Finland)
Publication Date:
Aug 01, 1996
Product Type:
Conference
Report Number:
IAEA-TECDOC-896; CONF-940864-
Reference Number:
SCA: 550603; 560101; PA: AIX-28:018204; EDB-97:029533; SN: 97001735899
Resource Relation:
Conference: Interregional seminar on radiotherapy dosimetry: radiation dose in radiotherapy from prescription to delivery, Rio de Janeiro (Brazil), 27-30 Aug 1994; Other Information: PBD: Aug 1996; Related Information: Is Part Of Radiation dose in radiotherapy from prescription to delivery; PB: 293 p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; RADIOTHERAPY; QUALITY ASSURANCE; ACCURACY; ANIMAL TISSUES; CARCINOMAS; DOSIMETRY; FRACTIONATED IRRADIATION; RADIATION DOSES; TUMOR CELLS
OSTI ID:
432442
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1011-4289; Other: ON: DE97614216; TRN: XA9642844018204
Availability:
INIS; OSTI as DE97614216
Submitting Site:
INIS
Size:
pp. 41-47
Announcement Date:

Citation Formats

Aaltonen, P. Definition of treatment geometry in radiation therapy. IAEA: N. p., 1996. Web.
Aaltonen, P. Definition of treatment geometry in radiation therapy. IAEA.
Aaltonen, P. 1996. "Definition of treatment geometry in radiation therapy." IAEA.
@misc{etde_432442,
title = {Definition of treatment geometry in radiation therapy}
author = {Aaltonen, P}
abstractNote = {When accurate systems for quality assurance and treatment optimization are employed, a precise system for fixation and dosimetric and portal verification are as important as a continued and standardized code of practice for dosimetry and patient follow-up, including registration of tumour responses and acute and late normal tissue reactions. To improve the accuracy of existing dose response relations in order to improve future therapy the treatment geometry and dose delivery concepts have to be accurately defined and uniformly employed. A Nordic working group was set up in 1991 to standardize the concepts and quantities used during the whole radiotherapy process in the Nordic countries. Now the group is finalizing its report ``Specification of Dose Delivery in Radiation Therapy``. The report emphasizes that the treatment geometry shall be consistent with the geometry used during the diagnostic work up. The patient fixation is of importance early in the diagnostic phase to ensure that the same reference points and patients position will be used both during the diagnostic work up, simulation and treatment execution. Reference Coordinate System of the patient is a concept based on defined anatomic reference points. This Patient Reference System is a local system which has validity for the tissues, organs and volumes defined during radiotherapy. The reference points of the Patient Reference System should in turn be used for beam set-up. The treatment geometry is then defined by using different concepts describing tissues which are mobile in the Patient Reference System, and finally, volumes which are fixed in this coordinate system. A Set-up Margin has to be considered for movements of the volumes defined in the Reference Coordinate System of the Patient in relation to the radiation beam. The Set-up Margin is dependent on the treatment technique and it is needed in the treatment planning procedure to ensure that the prescribed dose to the Target Volume is delivered.}
place = {IAEA}
year = {1996}
month = {Aug}
}