minutes, based on daily changes in shape, size, and position of the tumour, followed by accurate dose delivery with real-time tumour visualisation. With this high quality imaging capability, the Elekta Unity provides the precision to deliver radiation doses that can reduce the risk of harming nearby tissue and organs while enabling more aggressive treatment. This precise treatment approach advances patient care outcomes by significantly reducing the number of treatment sessions required, and the patient ‘treatment burden’ that results from current cancer treatments.

Project initiation

The Elekta Unity installation project was a long and complex project, undertaken over several years, with procurement starting in mid-2017. One of the existing TUH linear accelerators had been in constant operation for almost 10 years, and was approaching end of life, so in 2017 the THHS conducted a procurement process for its like-for-like replacement. It was at that point that Elekta put forward its new Unity machine as an alternative offering representing the latest innovation in radiotherapy cancer treatment; an alternative which the THHS was keen to pursue. Upon review of the Unity machine site ‘planning guides’, it was identified that a significant number of building services and infrastructure upgrades were required to accommodate the proposed machine within the existing space. Due to the significant complexity of the equipment requirements, and to ensure that Elekta maintained control of the build performance and quality outcomes, the infrastructure upgrade works were bundled together with the machine supply and installation as a design and construct project delivery method.

Elekta subsequently engaged GHD Pty as the services design consultants, and builders, Sydney-based PCI, as the managing contractor to supervise the infrastructure upgrades required. As PCI was based interstate, the company subcontracted a local Townsville company, AC Jones Builders, to deliver most of the onsite construction works and day-to-day site management.

Figure 3: Unity equipment layout design. Project scoping

The initial design for the project commenced in early 2018. The design works involved investigating the existing TUH site infrastructure and services against the Elekta Unity planning guides, and developing a scope of works and design documentation. The scope required converting a room that was previously used as a radiation bunker into a compliant suite for a machine that could perform both medical imaging and radiation procedures. This was a complex exercise. A new, larger equipment room was required to be constructed to house the Unity, and support equipment including servers, switchgear, dedicated air-conditioning, and the MRI magnet liquid cooling cabinet. A completely new

clinical ‘model of care’ for the operation of the suite was developed by TUH clinicians, and resulted in the need for an additional ‘preparation bay’ to be constructed directly outside the new Unity suite as part of the scope.

Services design requirements The project involved specialised design inclusions to complete this refurbishment. The existing hospital electrical supplies to the bunker needed to be upgraded to accommodate strict harmonic and impedance requirements. This involved running new sub-main cabling direct from the TUH-site electrical substation. This was to ensure continuity of electrical services and accurate machine operation. Specific mechanical system upgrades

Figure 4: The new Equipment Room. 30 Health Estate Journal February 2021

Figure 5: The Unity RF cage installation.

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