SBRT Pre-operatively for Pancreatic Cancer

"The investigators expect to need a maximum of 3 dose levels investigating dose to the area at risk of involved resection lines and to the tumour bed to assess the tolerability of SBRT in this setting.~Patient entry will commence at level 1. There is the option to de-escalate to Level -1 should 2 or more DLTs be observed at the starting level. SBRT will not be escalated above level 3.~Level -1:~Tumour (PTV) 6Gy/# (total dose 30Gy). Area at risk of R1 (PTV\_R) 8Gy/# (total dose 40Gy)~Level 1:~Tumour (PTV) 6Gy/# (total dose 30Gy). Area at risk of R1 (PTV\_R) 9Gy/# (total dose 45Gy)~Level 2:~Tumour (PTV) 6.5Gy/# (total dose 32.5Gy). Area at risk of R1 (PTV\_R) 9.5Gy/# (total dose 47.5Gy)~Level 3:~Tumour (PTV) 7Gy/# (total dose 35Gy). Area at risk of R1 (PTV\_R) 10Gy/# (total dose 50Gy)"