Intraoperative 3D Computed Tomography

Adamczak, Stephanie; Bova, Frank J.; Hoh, Daniel J.

doi:10.1016/j.nec.2017.06.002

Cited by 23 publications

(16 citation statements)

References 37 publications

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Section: Discussionmentioning

confidence: 99%

“…To ensure proper placement and exclude injuries to sensitive neural structures, intraoperative assessment of implant position is mandatory. As mentioned above, intraoperative 3D imaging has evolved to a quite common and frequently used tool to assess placement of either the guide wires or the screws itself during the operation [12][13][14]. Not only in spinal surgery, intraoperative 3D imaging helps the surgeon to assess the result of the operation, meaning reduction of fractures, correction of alignment and placement of implants.…”

mentioning

confidence: 99%

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Evaluation of image quality and assessability of a new flat‐panel 3D C‐arm compared to mobile and fixed computed tomography in posterior spinal fixation

Keil

Luxenhofer

Vetter

et al. 2020

Robotics Computer Surgery

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Background This study evaluates image quality of a new flat‐panel three‐dimensional (3D) C‐arm to the current generation and to intraoperative and stationary computed tomography (CT) in spinal surgery. Methods Three‐dimensional‐imaging of 44 posterior screws acquired with two generations of 3D C‐arms (Arcadis Orbic, AO and Cios Spin, CS, Siemens, Germany) and CT scans (mobile intraoperative CT Airo, iCT, Brainlab, Germany and stationary CT Aquilion 32, sCT, Toshiba, Japan) were performed. Evaluation regarded assessability and measurements of implant position. Results Assessability score was 0.11 in AO, 0.56 in sCT, 0.91 in iCT and 1.46 in CS (p < 0.0005). AO and CS showed a significant difference in accuracy (p = 0.001) as well as CS and iCT (p < 0.001). Measurements of protrusion over the anterior edge did not show a significant difference (p = 0.341). Conclusions Image quality of the new generation of flat‐panel 3D C‐arms competes with CT imaging and offers significant advantages compared to the former generation.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Evaluation of image quality and assessability of a new flat‐panel 3D C‐arm compared to mobile and fixed computed tomography in posterior spinal fixation

Keil

Luxenhofer

Vetter

et al. 2020

Robotics Computer Surgery

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show abstract

“…Since the introduction of the first mobile CT scanner in the 1990s, the technology has rapidly advanced to allow ease of use for intraoperative applications. Approximately a decade later, open gantry concept 3D imaging (e.g., O-Arm/ Medtronic Sofamor Danek, Inc., Memphis, TN, USA) and table mounted CT scanners (e.g., Airo/Brainlab, Munich, Germany) were developed (1). These smaller machine designs were targeted for use in the operating room and allowed for 3D navigation for spinal instrumentation (1,2).…”

Section: Introductionmentioning

confidence: 99%

Preoperative planning for intraoperative navigation guidance

Sabri¹,

York²

2021

Ann Transl Med

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Intraoperative navigation for spinal procedures has continued to gain popularity. Numerous platforms are currently on the market and offer a spectrum of features. Preoperative considerations when utilizing this technology begin with understanding the fundamental concepts and methods of navigation.Several key factors including patient positioning, reference array placement, and sequence of instrumentation can help improve intraoperative navigation workflow when planned appropriately. The authors review current literature to help guide surgeon decision making when utilizing navigation. Additionally, tips and techniques for use of navigation are detailed to help avoid common surgeon pitfalls. In general, navigation platforms are classified based on image acquisition and degree of surgeon motion restriction during instrumentation. Imageless platforms often require preoperative images to be uploaded into the navigation system. Image-based systems rely on intraoperative imaging to ensure accuracy of its referencing software.The system then creates a three-dimensional model that allows for visualization of the navigated instrument within the surgical field. Active and passive navigation describe the degree of surgeon free-motion restriction when utilizing navigated instruments. Active navigation platforms, such as most robotic systems, prevent the deviation of the surgeon's instrument from a predetermined trajectory. Passive navigation does not restrict surgeon motion and the projected trajectory of the instrumented can be displayed on a three-dimensional model.

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“…An important issue of the CT applications is the time required to obtain X-ray projections and to perform the image reconstruction. It is particularly relevant in the medical field, both for diagnostic purposes and for more advanced applications such as guiding surgical operations [24]. Reconstruction speed requirement is also present in the industry, for such applications as quality control on assembly lines [25].…”

Section: Introduction a Computed Tomography And Its Applicationsmentioning

confidence: 99%

Monitored Reconstruction: Computed Tomography as an Anytime Algorithm

et al. 2020

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Computed tomography is an important technique for non-destructive analysis of an object's internal structure, relevant for scientific studies, medical applications, and industry. Pressing challenges emerging in the field of tomographic imaging include speeding up reconstruction, reducing the time required to obtain the X-ray projections, and reducing the radiation dose imparted to the object. In this paper, we introduce a model of a monitored reconstruction process, in which the acquiring of projections is interspersed with image reconstruction. This model allows to examine the tomographic reconstruction process as an anytime algorithm and consider a problem of finding the optimal stopping point, corresponding to the required number of X-ray projections for the currently scanned object. We outline the theoretical framework for the monitored reconstruction, propose ways of constructing stopping rules for various reconstruction quality metrics and provide their experimental evaluation. Due to stopping at different times for different objects, the proposed approach allows to achieve a higher mean reconstruction quality for a given mean number of X-ray projections. Conversely, fewer projections on average are used to achieve the same mean reconstruction quality. INDEX TERMS Anytime algorithms, computed tomography, dose reduction, monitored reconstruction, optimal stopping, x-ray tomography.

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Intraoperative 3D Computed Tomography

Cited by 23 publications

References 37 publications

Evaluation of image quality and assessability of a new flat‐panel 3D C‐arm compared to mobile and fixed computed tomography in posterior spinal fixation

Evaluation of image quality and assessability of a new flat‐panel 3D C‐arm compared to mobile and fixed computed tomography in posterior spinal fixation

Preoperative planning for intraoperative navigation guidance

Monitored Reconstruction: Computed Tomography as an Anytime Algorithm

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