MR imaging of absorbed dose distributions for radiotherapy using ferrous sulphate gels

The measurement of absorbed dose distributions using dosemeter gel and magnetic resonance imaging (MRI) in a standard geometry has been investigated. Absorbed depth-dose curves and profiles measured with this new technique show good agreement with corresponding measurements using diodes. This was pr...

Full description

Saved in:
Bibliographic Details
Published inPhysics in medicine & biology Vol. 35; no. 12; pp. 1623 - 1631
Main Authors Olsson, L E, Fransson, A, Ericsson, A, Mattsson, S
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.1990
Institute of Physics
Subjects
Biological and medical sciences
Clinical Medicine
Dose-Response Relationship, Radiation
Ferrous Compounds
Ferrous Compounds - radiation effects
Gels
Humans
Klinisk medicin
Magnetic Resonance Imaging
Medical and Health Sciences
Medical sciences
Medicin och hälsovetenskap
Models, Structural
Radiologi och bildbehandling
Radiology, Nuclear Medicine and Medical Imaging
Radiometry
Radiometry - methods
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Sensitivity and Specificity
Sepharose
Sepharose - radiation effects
Dose repartition
Tumor
Absorbed dose
Radiobiology
Radiotherapy
Nuclear magnetic resonance imaging
Online AccessGet full text

Cover

More Information
Summary:The measurement of absorbed dose distributions using dosemeter gel and magnetic resonance imaging (MRI) in a standard geometry has been investigated. Absorbed depth-dose curves and profiles measured with this new technique show good agreement with corresponding measurements using diodes. This was proven in a 60Co beam as well as an electron beam. The dosemeter gel is made of agarose and ferrous sulphate solution. The dose response is linear (r = 0.9996) in the investigated dose interval, 0-40 Gy. The sensitivity is a factor of about six higher compared to ordinary ferrous sulphate solution, known as 'Fricke'. This is a true 3D dose measurement technique which will have a number of applications in radiation therapy, since it is possible to mould the gel to arbitrary geometries, mix different radiation qualities and integrate the absorbed dose from different kinds of fields.
ISSN:0031-9155
1361-6560
DOI:10.1088/0031-9155/35/12/003