The Experts below are selected from a list of 28074 Experts worldwide ranked by ideXlab platform

Peter Verdonk - One of the best experts on this subject based on the ideXlab platform.

  • the posterior cruciate ligament a study on its bony and soft tissue anatomy using novel 3d ct technology
    Knee Surgery Sports Traumatology Arthroscopy, 2013
    Co-Authors: Tom Van Hoof, Michiel Cromheecke, Thomas Tampere, Katharina Dherde, Jan Victor, Peter Verdonk
    Abstract:

    Purpose The bony insertion sites of the PCL have been studied and described extensively using 2D technology such as macroscopic images, Plain Radiograph, computerized tomography (CT) and MRI. The purpose of this study is to visualize both the tibial and the femoral bony insertion sites but also the soft tissue anatomy of the native PCL using novel 3D CT imaging. In addition, new concepts of best-fit cylinder and central axis are introduced and evaluated.

Timo Jamsa - One of the best experts on this subject based on the ideXlab platform.

  • trabecular homogeneity index derived from Plain Radiograph to evaluate bone quality
    Journal of Bone and Mineral Research, 2013
    Co-Authors: Jerome Thevenot, Jukka Hirvasniemi, Mikko A J Finnila, Pasi Pulkkinen, Volker Kuhn, Thomas M Link, F Eckstein, Timo Jamsa
    Abstract:

    Radiographic texture analysis has been developed lately to improve the assessment of bone architecture as a determinant of bone quality. We validate here an algorithm for the evaluation of trabecular homogeneity index (HI) in the proximal femur from hip Radiographs, with a focus on the impact of the principal compressive system of the trabecular bone, and evaluate its correlation with femoral strength, bone mineral density (BMD), and volumetric trabecular structure parameters. A semiautomatic custom-made algorithm was applied to calculate the HI in the femoral neck and trochanteric areas from Radiographs of 178 femoral bone specimens (mean age 79.3 ± 10.4 years). Corresponding neck region was selected in CT scans to calculate volumetric parameters of trabecular structure. The site-specific BMDs were assessed from dual-energy X-ray absorptiometry (DXA), and the femoral strength was experimentally tested in side-impact configuration. Regression analysis was performed between the HI and biomechanical femoral strength, BMD, and volumetric parameters. The correlation between HI and failure load was R2 = 0.50; this result was improved to R2 = 0.58 for cervical fractures alone. The discrimination of bones with high risk of fractures (load <3000 N) was similar for HI and BMD (AUC = 0.87). Regression analysis between the HIs versus site-specific BMDs yielded R2 = 0.66 in neck area, R2 = 0.60 in trochanteric area, and an overall of R2 = 0.66 for the total hip. Neck HI and BMD correlated significantly with volumetric structure parameters. We present here a method to assess HI that can exPlain 50% of an experimental failure load and determines bones with high fracture risk with similar accuracy as BMD. The HI also had good correlation with DXA and computed tomography–derived data. © 2013 American Society for Bone and Mineral Research.

Tom Van Hoof - One of the best experts on this subject based on the ideXlab platform.

  • the posterior cruciate ligament a study on its bony and soft tissue anatomy using novel 3d ct technology
    Knee Surgery Sports Traumatology Arthroscopy, 2013
    Co-Authors: Tom Van Hoof, Michiel Cromheecke, Thomas Tampere, Katharina Dherde, Jan Victor, Peter Verdonk
    Abstract:

    Purpose The bony insertion sites of the PCL have been studied and described extensively using 2D technology such as macroscopic images, Plain Radiograph, computerized tomography (CT) and MRI. The purpose of this study is to visualize both the tibial and the femoral bony insertion sites but also the soft tissue anatomy of the native PCL using novel 3D CT imaging. In addition, new concepts of best-fit cylinder and central axis are introduced and evaluated.

Norman Wendell Todd - One of the best experts on this subject based on the ideXlab platform.

  • cochlear view Plain Radiograph a simple reliable positioning method
    Cochlear Implants International, 2018
    Co-Authors: Stephanie E Ambrose, Norman Wendell Todd
    Abstract:

    Introduction: The Plain ‘cochlear view’ Radiograph for checking cochlear implant electrode coiling and depth of insertion is strongly influenced by positioning. The best accuracy and inter-observer agreement are achieved with the X-ray beam passing through the axis of the modiolus, which is perpendicular to the plane of the basal turn of the cochlea. The basal turn of the cochlea generally is 45 from the head’s sagittal plane.Objective: To describe a simple reliable technique of patient positioning to maximize the accuracy of postoperative Radiographs in the evaluation of cochlear electrode insertion.Methods: This is a description of patient positioning and Radiographic technique for intra-operatively checking the position of the electrode array of a cochlear implant. For the surgery, the patient’s head is rolled 60° to the side, and the head stabilized in/on a Mayfield horseshoe headrest. For the X-ray, the operating table is rolled 15° toward the operated ear. The central X-ray beam from the C-arm is di...

S. Cannon - One of the best experts on this subject based on the ideXlab platform.

  • Chondromyxoid fibroma of the sacrum.
    European Radiology, 1999
    Co-Authors: H. G. Brat, P. Renton, A. Sandison, S. Cannon
    Abstract:

    A 30-year-old man with a 7-month history of mild sacral pain and intermittant left sciatica was found to have an expansile lesion in the sacrum on a Plain Radiograph. Biopsy confirmed a chondromyxoid fibroma which was removed surgically. A 1-year follow-up showed no recurrence. The case is the fifth to be reported. Plain film and MRI appearances, histology and treatment are described. The previously reported cases are reviewed and the current literature is discussed.