Payam Tarassoli
Bristol Royal Infirmary
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Publication
Featured researches published by Payam Tarassoli.
Injury-international Journal of The Care of The Injured | 2017
Payam Tarassoli; P.A. McCann; Rouin Amirfeyz
Injuries to the elbow are commonly encountered in orthopaedic practice. They range from low energy, simple isolated fractures, to high energy complex fracture dislocations with severe ligamentous disruption. Recognising the precise pattern of injury is critical in restoring elbow function and preventing chronic instability, pain and weakness. This article discusses the important osseous and ligamentous stabilisers of the elbow joint and provides management protocols for the common patterns of complex injury encountered by the practising surgeon.
international conference of the ieee engineering in medicine and biology society | 2015
Ioannis Georgilas; Giulio Dagnino; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
Our group at Bristol Robotics Laboratory has been working on a new robotic system for fracture surgery that has been previously reported [1]. The robotic system is being developed for distal femur fractures and features a robot that manipulates the small fracture fragments through small percutaneous incisions and a robot that re-aligns the long bones. The robots controller design relies on accurate and bounded force and position parameters for which we require real surgical data. This paper reports preliminary findings of forces and torques applied during bone and soft tissue manipulation in typical orthopaedic surgery procedures. Using customised orthopaedic surgical tools we have collected data from a range of orthopaedic surgical procedures at Bristol Royal Infirmary, UK. Maximum forces and torques encountered during fracture manipulation which involved proximal femur and soft tissue distraction around it and reduction of neck of femur fractures have been recorded and further analysed in conjunction with accompanying image recordings. Using this data we are establishing a set of technical requirements for creating safe and dynamically stable minimally invasive robot-assisted fracture surgery (RAFS) systems.
international conference of the ieee engineering in medicine and biology society | 2015
Giulio Dagnino; Ioannis Georgilas; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
This paper presents the design, development and control of a new robotic system for fracture manipulation. The objective is to improve the precision, ergonomics and safety of the traditional surgical procedure to treat joint fractures. The achievements toward this direction are here reported and include the design, the real-time control architecture and the evaluation of a new robotic manipulator system. The robotic manipulator is a 6-DOF parallel robot with the struts developed as linear actuators. The control architecture is also described here. The high-level controller implements a host-target structure composed by a host computer (PC), a real-time controller, and an FPGA. A graphical user interface was designed allowing the surgeon to comfortably automate and monitor the robotic system. The real-time controller guarantees the determinism of the control algorithms adding an extra level of safety for the robotic automation. The systems positioning accuracy and repeatability have been demonstrated showing a maximum positioning RMSE of 1.18 ± 1.14mm (translations) and 1.85 ± 1.54° (rotations).
computer assisted radiology and surgery | 2017
Giulio Dagnino; Ioannis Georgilas; Samir Morad; Peter Gibbons; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
PurposeJoint fractures must be accurately reduced minimising soft tissue damages to avoid negative surgical outcomes. To this regard, we have developed the RAFS surgical system, which allows the percutaneous reduction of intra-articular fractures and provides intra-operative real-time 3D image guidance to the surgeon. Earlier experiments showed the effectiveness of the RAFS system on phantoms, but also key issues which precluded its use in a clinical application. This work proposes a redesign of the RAFS’s navigation system overcoming the earlier version’s issues, aiming to move the RAFS system into a surgical environment.MethodsThe navigation system is improved through an image registration framework allowing the intra-operative registration between pre-operative CT images and intra-operative fluoroscopic images of a fractured bone using a custom-made fiducial marker. The objective of the registration is to estimate the relative pose between a bone fragment and an orthopaedic manipulation pin inserted into it intra-operatively. The actual pose of the bone fragment can be updated in real time using an optical tracker, enabling the image guidance.ResultsExperiments on phantom and cadavers demonstrated the accuracy and reliability of the registration framework, showing a reduction accuracy (sTRE) of about
Annals of Biomedical Engineering | 2018
Ioannis Georgilas; Giulio Dagnino; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
international conference on robotics and automation | 2017
Giulio Dagnino; Ioannis Georgilas; Samir Morad; Peter Gibbons; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
0.88~\pm 0.2\,\hbox {mm}
computer assisted radiology and surgery | 2016
Giulio Dagnino; Ioannis Georgilas; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
Orthopaedics and Trauma | 2009
Payam Tarassoli; Rouin Amirfeyz; Martin Gargan
0.88±0.2mm (phantom) and
Journal of Bone and Joint Surgery-british Volume | 2016
Giulio Dagnino; Ioannis Georgilas; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
Annals of Biomedical Engineering | 2017
Giulio Dagnino; Ioannis Georgilas; Samir Morad; Peter Gibbons; Payam Tarassoli; Roger Atkins; Sanja Dogramadzi
1.15\pm 0.8\,\hbox {mm}