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Ano-rectal cancer
II – T site
o
Difficult to distinguish between tumour, normal GI canal and muscle on CT
o
Trans rectal ultrasound
for lower tumours
o
Rectoscopy for higher
o
MRI better, maybe improved by dynamic approach
o
Role of PET not clear
o
Be aware of diagnostic and treatment position
o
Supine/prone
2015/May/29
Ultrasound fused on to CT, calculated dose co-registred on
ultrasound image, personal communication, AK Berthelsen
Kierkels, IJROBP, 2010