Medical application of 3-D polymer gel dosemeter evaluated by nuclear magnetic resonance

J. Novotny, P. Dvorak, V. Spevacek, J. Tintera, J. Novotny, T. Cechak, Y. S. Horowitz, L. Oster

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A polymer-gel dosemeter, which can be evaluated by nuclear magnetic resonance (NMR), was prepared and then a few samples were homogeneously irradiated by a Leksell gamma knife using an 18 mm collimator (60Co gamma photons) to obtain a calibration curve (NMR 1/T2 response to absorbed dose). To measure dose distribution from the Leksell gamma knife, a testing flask filled with the gel was fixed in the head phantom and then irradiated based on a calculated treatment plan. Evaluation of dosemeters was performed on a Siemens EXPERT 1T NMR scanner. Dose profiles in X, Y and Z coordinates through the ellipsoidal shape of the dose distribution were obtained to compare experimental results from the irradiated phantom with the treatment planning system calculations. The use of a polymer-gel dosemeter for a verification of stereotactic procedures has some unique advantages which can be summarised as follows: (1) the dosemeter itself is tissue equivalent, (2) three-dimensional dose distributions can be measured, (3) the dosemeter allows patient's procedures to be simulated without any limitations.

Original languageEnglish
Pages (from-to)399-402
Number of pages4
JournalRadiation Protection Dosimetry
Volume101
Issue number1-4
DOIs
StatePublished - 1 Jan 2002

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Radiation
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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