Siemens biography mmr locations of ann

  • Siemens has already installed a number of Biograph mMR systems at customer sites for clinical research, including university hospital.
  • Scientists at the Lawson Health Research Institute in London, Ontario will be the first in.
  • Both the mMR and the mCT detectors consist of lutetium oxyorthosilicate (LSO) crystals of 4 × 4 × 20 mm.

    • •

    . Author manuscript; available in PMC: Aug

    Published in final edited form as: Phys Med Biol. Jul 29;58(16)//58/16/ doi: //58/16/

    Abstract

    Whole-body PET/CT scanners are important clinical and research tools to study tracer distribution throughout the body. In whole-body studies, respiratory motion results in image artifacts. We have previously demonstrated for brain imaging that, when provided accurate motion data, event-by-event correction has better accuracy than frame-based methods. Therefore, the goal of this work was to develop a list-mode reconstruction with novel physics modeling for the Siemens Biograph mCT with event-by-event motion correction, based on the MOLAR platform (Motion-compensation OSEM List-mode Algorithm for Resolution-Recovery Reconstruction). Application of MOLAR for the mCT required two algorithmic developments. First, in routine studies, the mCT collects list-mode uppgifter in bit packets, where averaging of lines of response (LORs) by axial span and angul

  • siemens biography mmr locations of ann

    • •

    Image quality and detectability in Siemens Biograph PET/MRI and PET/CT systems—a phantom study

    Abstract

    Background

    The technology of modern positron emission tomography (PET) systems continuously improving, and with it the possibility to detect smaller lesions. Since first introduced in , the number of hybrid PET/magnetic resonance imaging (MRI) systems worldwide is constantly increasing. It is therefore important to assess and compare the image quality, in terms of detectability, between the PET/MRI and the well-established PET/computed tomography (CT) systems. For this purpose, a PET image quality phantom (Esser) with hot spheres, ranging from 4 to 20 mm in diameter, was prepared with fluorodeoxyglucose and sphere-to-background activity concentrations of and , to mimic clinical conditions. The phantom was scanned on a PET/MRI and a PET/CT system for both concentrations to obtain contrast recovery coefficients (CRCs) and contrast-to-noise ratios (CNRs), for a range of reconstruc

    •

    Attenuation correction for PET/MRI to measure tracer activity surrounding total knee arthroplasty

    • Original article
    • Open access
    • Published:
    • Caleigh E. Bourdon1,2,3,
    • Zachary J. KoudysORCID: 1,2,3,
    • Brent A. Lanting4,
    • C. Thomas Appleton5,
    • Jonathan D. Thiessen1,3,6 &
    • …
    • Matthew G. Teeter1,2,3,4,6

    European Journal of Hybrid Imagingvolume 6, Article number: 31 () Cite this article

    • Accesses

    • 1 Altmetric

    • Metrics details

    Abstract

    Background

    Positron emission tomography (PET) in combination with magnetic resonance imaging (MRI) could allow inflammatory complications nära total knee arthroplasty (TKA) to be studied early in their development. However, attenuation of the PET signal by the metall TKA implants imparts substantial error into measurements of tracer activity, and conventional MR-based attenuation correction (AC) methods have large meddelande voids in the vicinity of metal implants.

    Purpose

    To evaluate a segmentation-based AC ap