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An example of the Acrobot Planner for a hip resurfacing procedure

CT (Computed Tomography) Scan
	CT scan data is needed so that a specific patient 3D bone model can be produced. This is produced by a Radiographer using the Acrobot Modeller software so that a plan can be generated using the Acrobot Planner software. A CT scanner uses a series of X-ray beams to produce a highly detailed, three-dimensional, high spatial resolution, digital image of the body, unlike conventional flat, one beam X-ray. Modern CT systems work with minimal radiation doses and have very short scan times.

	The CT scan data is processed in the Acrobot Modeller software to produce a 3D model of the patient's bone. This 3D model can then be used by the surgeon for planning of the procedure using the Acrobot Planner software.

	The Acrobot Planner software allows the surgeon to visualise on a computer the 3D model of the joint produced in Modeller. The surgeon can use this to plan the exact position and size of the implant required before commencing surgery. The entire procedure can be visualised prior to surgery on the computer and the desired orientation of the implant can be analysed and discussed. This is very advantageous for the surgeon and can facilitate very accurate implant placement.

	The Acrobot Navigator is a unique non-optical / non-electromagnetic navigation system, which uses mechanical tracking of the surgical instruments to the patient to achieve high surgical accuracy - enabling bone preperation and implant positioning exactly in line with the plan created using the Acrobot Planner, without an intra-operative time penalty. This system features a powerful computer together with two tracking arms all mounted within a trolley which is rolled up to the side of the operating table. On the computer the information previously planned using Acrobot Planner is available to enable the two tracking arms to follow where the patient and the tools are relative to each other. Using a combination of the data provided by the tracking arms and the pre-planned data, the computer screen shows the surgeon his movements and decisions in real time versus the plan. This ensures that the bone will be prepared accurately enabling the implant to be placed exactly as planned.

	This is an exciting new development which will become available in 2009 after extensive clinical evaluation.
For more information on any of these procedures please consult your medical practitioner.