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Are therapeutic radiographers able to achieve clinically acceptable verification for stereotactic lung radiotherapy treatment (SBRT)?

Published online by Cambridge University Press:  07 January 2015

J. Hudson ,
C. Doolan ,
F. McDonald ,
I. Locke ,
M. Ahmed ,
G. Gunapala  and
H. McNair
J. Hudson*
Affiliation:
Departments of Radiotherapy, Lung Unit and Statistics. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, UK
C. Doolan
Affiliation:
Department of Health Studies, University Campus Suffolk, Ipswich, Suffolk, UK
F. McDonald
Affiliation:
Departments of Radiotherapy, Lung Unit and Statistics. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, UK
I. Locke
Affiliation:
Departments of Radiotherapy, Lung Unit and Statistics. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, UK
M. Ahmed
Affiliation:
Departments of Radiotherapy, Lung Unit and Statistics. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, UK
G. Gunapala
Affiliation:
Departments of Radiotherapy, Lung Unit and Statistics. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, UK
H. McNair
Affiliation:
Departments of Radiotherapy, Lung Unit and Statistics. Royal Marsden NHS Foundation Trust and Institute of Cancer Research, UK
*
Correspondence to: Jacqui Hudson, Department of Radiotherapy, Royal Marsden NHS Foundation Trust, Sutton, SM2 5PT, UK. Tel: +44 (0) 20 8915 6020. Fax: +44 (0) 20 8915 6793. E-mail: Jacqui.hudson@rmh.nhs.uk
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Abstract

Purpose

The aim of this study was to assess the feasibility of radiographer led verification of cone-beam computed tomography (CBCT) images for patients with solitary lung tumours treated with stereotactic body radiotherapy treatment (SBRT).

Material and methods

CBCT setup images of 20 patients from the first fraction of each patient were retrospectively registered by therapeutic radiographers. The displacements recorded were compared with the clinical oncologist’s original online match. The time taken by radiographers to verify the CBCT images was also recorded.

Results

Overall agreement for all radiographers when compared with the clinical oncologist match was 91%. Interobserver variations between radiographers were X plane 0·87 (0·76–0·94); Y plane 0·74 (0·51–0·88); and Z plane 0·88 (0·78–0·95) intraclass correlation coefficient and 95% confidence interval. The average time taken for verification was 128 seconds.

Conclusion

Therapeutic radiographers are able to verify CBCT images for thorax SBRT with results comparable to the ‘gold standard’ clinical oncologists’ match, however additional training will be provided for online verification. The time taken was within acceptable limits.

Keywords

CBCTnon-small cell lung cancerrole expansionstereotactic radiotherapy
Type
Original Articles
Information
Journal of Radiotherapy in Practice , Volume 14 , Issue 1 , March 2015 , pp. 10 - 17
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Copyright
© Cambridge University Press 2015 

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