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ENGINEERING INSTALLATION


and rebates) to ensure accurate location of the isocentre, and successful alignment of the gantry, Field Generation Unit (FGU), and table assemblies. All told, about 100 tonnes of concrete was removed, and 40 tonnes of 20 mm D-form stainless steel reinforcement bar was used in the construction of the new slab and pit floor.


Core hole through external wall To allow for delivery of the new Unity (including the magnet), a new 3 x 3 metre core hole through the existing concrete external wall was required. Due to the depth of this wall being over 1 m, another innovative concrete cutting technique was required. A large wire-rope saw cutting machine was used to cut and remove block sections of the wall to create the new opening (see Fig 7). Once the Unity was delivered and craned into the room, the opening was filled with special ARPANSA-supplied ‘high density’ bricks. These bricks were dry stacked and staggered to achieve the required radiation shielding requirements, and allow for easy access for future machine replacement.


Project management challenges The construction management component of the project also had its own unique challenges. With the project manager and contractors based in the southern capitals of Melbourne and Sydney, and the Unity design engineers and installers based in the US, the UK, and mainland Europe, project meetings were almost exclusively held online. Project team site inspections were infrequent, and technical queries were challenging to resolve. Delivery of a highly technical installation with a design brief that continued to evolve throughout the construction phase, and with a project team spread across the world, made management and supervision of the project challenging. Despite these


Figure 7 (clockwise from top left): Wire saw cutting of the external bunker wall; the crane lift of the MRI magnet through the hospital courtyard; assembly of the Elekta Unity componentry within the new room, and high density brick installation.


challenges, the project delivered a highly successful outcome, and is a testament to the entire project team, contractors, and stakeholder groups, who assisted along the way.


Conclusion


This nation-leading installation offers our community access to one of the most advanced cancer treatment technologies in the world, with improved patient


outcomes. It also opens communication channels for collaboration with our international ‘Unity’ partners, and enables further clinical cancer research at TUH, attracting exceptional oncology clinicians to the region. Being the first installation of its kind in Australia, this revolutionary machine installation also aligns with the TUH strategic vision to be the leader in healthcare, research, and education, for regional Australia.


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Figure 8: Helium filling of the Unity machine. 32 Health Estate Journal February 2021


Figure 9: The Townsville University Hospital Elekta Unity patient treatment room.


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