open access

Vol 23, No 5 (2018)
Published online: 2018-09-01
Submitted: 2017-08-02
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Analysis of the long-term stability of the output of electron beams generated by the Novac11™ IORT accelerator

Michał Bijok, Ewelina Gruszczynska, Adam Kowalczyk, Katarzyna Sikorska, Agnieszka Walewska, Pawel F. Kukolowicz
DOI: 10.1016/j.rpor.2018.07.003
·
Rep Pract Oncol Radiother 2018;23(5):341-345.

open access

Vol 23, No 5 (2018)
Published online: 2018-09-01
Submitted: 2017-08-02

Abstract

Aim

The aim of the study was to analyze the long-term stability of electron beams generated by the Novac11™ IORT accelerator.

Background

Novac11™ (NRT®) is a mobile electron accelerator designed to irradiate small areas of tissue, up to 10 cm in diameter, with electron beams during surgical procedures. It is characterized by a great mobility guaranteed by a number of degrees of freedom enabling irradiation in the conditions of an operating theatre.

Materials and methods

Over the period of January 2013 and September 2016, the measurement sessions of the output of clinically used beam qualities (6, 8 and 10 MeV) were carried out 41 times. Because of the unsatisfactory long-term stability, an extra procedure of tuning of the magnetron, suggested by the manufacturer, was introduced in October 2015, 15 measurements were performed since then. The output of the Novac11™ accelerator was measured in the reference conditions recommended by the IAEA Report 398, the measurements of the charge in the ionization chamber at the reference depth were carried out with a Dose1™ electrometer and a plane-parallel chamber PPC05™ from IBA®.

Results

The introduction of the tuning of the magnetron procedure resulted in satisfactory long-term stability of the measured outputs below 2%.

Conclusions

After the introduction of the STV parameter tuning procedure, the long-term stability of the Novac11™ output increased considerably and is within the values declared by the manufacturer.

Abstract

Aim

The aim of the study was to analyze the long-term stability of electron beams generated by the Novac11™ IORT accelerator.

Background

Novac11™ (NRT®) is a mobile electron accelerator designed to irradiate small areas of tissue, up to 10 cm in diameter, with electron beams during surgical procedures. It is characterized by a great mobility guaranteed by a number of degrees of freedom enabling irradiation in the conditions of an operating theatre.

Materials and methods

Over the period of January 2013 and September 2016, the measurement sessions of the output of clinically used beam qualities (6, 8 and 10 MeV) were carried out 41 times. Because of the unsatisfactory long-term stability, an extra procedure of tuning of the magnetron, suggested by the manufacturer, was introduced in October 2015, 15 measurements were performed since then. The output of the Novac11™ accelerator was measured in the reference conditions recommended by the IAEA Report 398, the measurements of the charge in the ionization chamber at the reference depth were carried out with a Dose1™ electrometer and a plane-parallel chamber PPC05™ from IBA®.

Results

The introduction of the tuning of the magnetron procedure resulted in satisfactory long-term stability of the measured outputs below 2%.

Conclusions

After the introduction of the STV parameter tuning procedure, the long-term stability of the Novac11™ output increased considerably and is within the values declared by the manufacturer.

Get Citation

Keywords

Long-term stability; Output; Intraoperative radiotherapy

About this article
Title

Analysis of the long-term stability of the output of electron beams generated by the Novac11™ IORT accelerator

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 23, No 5 (2018)

Pages

341-345

Published online

2018-09-01

DOI

10.1016/j.rpor.2018.07.003

Bibliographic record

Rep Pract Oncol Radiother 2018;23(5):341-345.

Keywords

Long-term stability
Output
Intraoperative radiotherapy

Authors

Michał Bijok
Ewelina Gruszczynska
Adam Kowalczyk
Katarzyna Sikorska
Agnieszka Walewska
Pawel F. Kukolowicz

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