ESTRO course on Image Guided Radiotherapy in Clinical Practice 2018

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5
 31 patients
 8 CBCT scans per patient:
249 scans evaluated
 9 ROIs per patient
 Retrospectively:
Larynx assumed as PTV
Vertebrae assumed as OAR
How flexible is the neck ? How flexible is the neck ?
Count occurrence of ROI
within certain margin
ROI:
• PTV(larynx)
• OAR (C3-C5)
Margin 0..10 mm (1 mm)
How flexible is the neck ?
Count occurrence of ROI
within certain margin
ROI:
• PTV(larynx)
• OAR (C3-C5)
Margin 0..10 mm (1 mm)
How flexible is the neck ?
Count occurrence of ROI
within certain margin
ROI:
• PTV(larynx)
• OAR (C3-C5)
Margin 0..10 mm (1 mm)
How flexible is the neck ?
Count occurrence of ROI
within certain margin
ROI:
• PTV(larynx)
• OAR (C3-C5)
Margin 0..10 mm (1 mm)
How flexible is the neck ?
Count occurrence of ROI
within certain margin
ROI:
• PTV(larynx)
• OAR (C3-C5)
Margin 0..10 mm (1 mm)