open access

Vol 10, No 6 (2005)
Technical Notes
Published online: 2005-01-01
Submitted: 2005-02-01
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Photon Radiosurgery System – time stability of the calibration parameters

Andrzej Orlef, Zbigniew Maniakowski, Adam Bekman, Jerzy Wydmański
DOI: 10.1016/S1507-1367(05)71106-8
·
Rep Pract Oncol Radiother 2005;10(6):321-325.

open access

Vol 10, No 6 (2005)
Technical Notes
Published online: 2005-01-01
Submitted: 2005-02-01

Abstract

Aim

The aim of the paper is to present the time stability of the calibration parameters of a miniature 50 kV Photon Radiosurgery System used during surgical procedures to irradiate tumour beds.

Materials/Methods

Before tumour irradiation, calibration procedures were performed and individual treatment times were calculated. During quality control procedures, parameters such as probe straightness, isotropy of the beam and stability of the internal and external monitors were checked. Also output dose rate was measured.

Results

The average values of the parameters measured, and percentage deviations (1 SD) thereof, were as follows: probe straightness 0.035 mm (22.1%); isotropy of the beam 5.72% (3.5%); internal monitor reading 8.182 E4 104 (0.7%); external monitor reading 2.932 Hz (3.1%); output dose rate 2.731 Gy/min (1.8%).

Conclusions

High stability of the calibration parameters was observed. Measurement of probe deviation is a necessary condition in each radiotherapy procedure.

Abstract

Aim

The aim of the paper is to present the time stability of the calibration parameters of a miniature 50 kV Photon Radiosurgery System used during surgical procedures to irradiate tumour beds.

Materials/Methods

Before tumour irradiation, calibration procedures were performed and individual treatment times were calculated. During quality control procedures, parameters such as probe straightness, isotropy of the beam and stability of the internal and external monitors were checked. Also output dose rate was measured.

Results

The average values of the parameters measured, and percentage deviations (1 SD) thereof, were as follows: probe straightness 0.035 mm (22.1%); isotropy of the beam 5.72% (3.5%); internal monitor reading 8.182 E4 104 (0.7%); external monitor reading 2.932 Hz (3.1%); output dose rate 2.731 Gy/min (1.8%).

Conclusions

High stability of the calibration parameters was observed. Measurement of probe deviation is a necessary condition in each radiotherapy procedure.

Get Citation

Keywords

low energy X-rays; radiosurgery; interstitial radiotherapy

About this article
Title

Photon Radiosurgery System – time stability of the calibration parameters

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 10, No 6 (2005)

Pages

321-325

Published online

2005-01-01

DOI

10.1016/S1507-1367(05)71106-8

Bibliographic record

Rep Pract Oncol Radiother 2005;10(6):321-325.

Keywords

low energy X-rays
radiosurgery
interstitial radiotherapy

Authors

Andrzej Orlef
Zbigniew Maniakowski
Adam Bekman
Jerzy Wydmański

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