ESTRO course on Image Guided Radiotherapy in Clinical Practice 2018

How flexible is the neck ?

How flexible is the neck ?

 31 patients  8 CBCT scans per patient: 249 scans evaluated  9 ROIs per patient  Retrospectively: Larynx assumed as PTV Vertebrae assumed as OAR

Count occurrence of ROI within certain margin

ROI:

• PTV(larynx)

• OAR (C3-C5)

Margin 0..10 mm (1 mm)

How flexible is the neck ?

How flexible is the neck ?

Count occurrence of ROI within certain margin

Count occurrence of ROI within certain margin

ROI:

ROI:

• PTV(larynx)

• PTV(larynx)

• OAR (C3-C5)

• OAR (C3-C5)

Margin 0..10 mm (1 mm)

Margin 0..10 mm (1 mm)

How flexible is the neck ?

How flexible is the neck ?

Count occurrence of ROI within certain margin

Count occurrence of ROI within certain margin

ROI:

ROI:

• PTV(larynx)

• PTV(larynx)

• OAR (C3-C5)

• OAR (C3-C5)

Margin 0..10 mm (1 mm)

Margin 0..10 mm (1 mm)

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