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First published online April 26, 2006
British Journal of Radiology (2006) 79, 672-680
© 2006 British Institute of Radiology
doi: 10.1259/bjr/14663755
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Optimizing localization accuracy in head and neck, and brain radiotherapy

M McJury, PhD1, K Dyker, MBChB, MRCP, FRCR2, R Nakielny, MA(Cantab), BM BCh, FRCR3, J Conway, PhD1 and M H Robinson, MD, FRCP, FRCR2

Departments of 1Radiotherapy Physics 2YCR Clinical Oncology, Weston Park Hospital, Whitham Road, Sheffield 3Department of Radiology, Royal Hallamshire Hospital, Glossop Road, Sheffield, UK


Figure 1
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  		Figure 1. The image fusion workspace showing marked-up contours. If the CT coordinates are the same for both scans, enhanced CT data on the left can be automatically fused to the unenhanced data on the right. Contours marked-up on the enhanced scan are then automatically transferred to the unenhanced scan for storage with previous contours. Contours shown are planning target volume (PTVunenh) (dark line) and gross tumour volume (GTVunenh) (light line).

 

Figure 2
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  		Figure 2. Pre- and post-contrast images of a tonsil patient. Enhanced scan is shown on the left. The gross tumour volume (GTV) based on the unenhanced scan is shown in red.

 

Figure 3
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  		Figure 3. Pre- and post-contrast images of a nasopharynx patient. Enhanced scan is on the left. The gross tumour volume (GTV) based on unenhanced data is shown.

 

Figure 4
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  		Figure 4. Pre- and post- contrast images of a glioblastoma patient. Enhanced scan on the left. The gross tumour volume (GTV) based on the unenhanced data is shown.

 




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