Microsoft PowerPoint - Physics Bucharest

Previous Page

Next Page

Page Background

MV Fan Beam CT

Advantages

• MV treatment beam used (reduced to

3.5MV for CT acquisition)

• Slice thickness of 2,4 and 6mm

• Fan beam with co-incident treatment and

imaging iso-centres

• No artefact from high density objects e.g.

hip prosthesis

Limitations

• MV contrast

• Slow image acquisition (5s per slice)

• Image quality vs. dose? (1-3cGy)

• Longitudinal artefacts from resp

motion

axis resolution?

Tomotherapy