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  1. Artikel: Use of single photon metal artefact reduction in the detection of an impacted capsule endoscope.

    Zhou, Kevin Z / Khor, Robert / Lau, Kenneth K

    BJR case reports

    2017  Band 3, Heft 4, Seite(n) 20170050

    Abstract: Wireless capsule endoscopy was introduced over a decade ago and is now a widely used tool in the investigation of gastrointestinal pathologies. Despite its ubiquity, the full profile of indications, contraindications and complications is still being ... ...

    Abstract Wireless capsule endoscopy was introduced over a decade ago and is now a widely used tool in the investigation of gastrointestinal pathologies. Despite its ubiquity, the full profile of indications, contraindications and complications is still being developed. Metal artefact reduction is a software technique which can significantly reduce the artefact produced by metallic objects on CT scans. This case exemplifies a rare but noteworthy complication of capsule endoscopy and highlights a novel application of metal artefact reduction.
    Sprache Englisch
    Erscheinungsdatum 2017-08-04
    Erscheinungsland England
    Dokumenttyp Case Reports
    ISSN 2055-7159
    ISSN 2055-7159
    DOI 10.1259/bjrcr.20170050
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Noninvasive Assessment of Acute Graft-Versus-Host Disease of the Gastrointestinal Tract After Allogeneic Hemopoietic Stem Cell Transplantation Using

    Cherk, Martin H / Khor, Robert / Barber, Thomas W / Yap, Kenneth S K / Patil, Sushrut / Walker, Patricia / Avery, Sharon / Roberts, Stuart / Kemp, William / Pham, Alan / Bailey, Michael / Kalff, Victor

    Journal of nuclear medicine : official publication, Society of Nuclear Medicine

    2022  Band 63, Heft 12, Seite(n) 1899–1905

    Abstract: Acute graft-versus-host disease of the gastrointestinal tract (acute GIT-GVHD) often complicates allogeneic hemopoietic stem cell transplantation (AHSCT). ...

    Abstract Acute graft-versus-host disease of the gastrointestinal tract (acute GIT-GVHD) often complicates allogeneic hemopoietic stem cell transplantation (AHSCT).
    Mesh-Begriff(e) Humans ; Graft vs Host Disease/diagnostic imaging ; Fluorodeoxyglucose F18 ; Positron Emission Tomography Computed Tomography/adverse effects ; Hematopoietic Stem Cell Transplantation/adverse effects ; Gastrointestinal Tract/pathology ; Endoscopy, Gastrointestinal/adverse effects ; Retrospective Studies
    Chemische Substanzen Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Sprache Englisch
    Erscheinungsdatum 2022-04-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 80272-4
    ISSN 1535-5667 ; 0097-9058 ; 0161-5505 ; 0022-3123
    ISSN (online) 1535-5667
    ISSN 0097-9058 ; 0161-5505 ; 0022-3123
    DOI 10.2967/jnumed.121.263688
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Orthopaedic and non-orthopaedic applications of a single-energy iterative metal artefact reduction technique and other metal artefact reduction techniques explained.

    Khor, Robert / Buchan, Kevin / Kuganesan, Ahilan / Ardley, Nicholas / Lau, Kenneth K

    The British journal of radiology

    2016  Band 89, Heft 1064, Seite(n) 20160171

    Abstract: Metal within the CT field of view causes artefact that degrades the diagnostic quality of the processed images. This is related to the high atomic number of most metals and is due to a combination of beam hardening, scatter, edge effects and photon ... ...

    Abstract Metal within the CT field of view causes artefact that degrades the diagnostic quality of the processed images. This is related to the high atomic number of most metals and is due to a combination of beam hardening, scatter, edge effects and photon starvation. Both software and hardware metal artefact reduction (MAR) techniques have been developed. Iterative reconstruction software MAR techniques can be applied on raw CT data sets and show improved image quality in the setting of sparse projection data when compared with filtered back-projection methods. Recently, a novel single-energy iterative metal artefact reduction technique (IMART) was released for use with large orthopaedic devices. The aim of this pictorial essay was to demonstrate the usefulness of IMART in the setting of both orthopaedic and non-orthopaedic metallic objects and devices.
    Sprache Englisch
    Erscheinungsdatum 2016-05-25
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2982-8
    ISSN 1748-880X ; 0007-1285
    ISSN (online) 1748-880X
    ISSN 0007-1285
    DOI 10.1259/bjr.20160171
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Excellent suppression of physiological myocardial FDG activity in patients with cardiac sarcoidosis.

    Sankaran, Shyam S / Kyprianou, Katerina / Cherk, Martin H / Nadebaum, David P / Beech, Paul A / Khor, Robert / Zimmet, Hendrik / Hare, James L / Larby, Annabel / Yap, Kenneth Sk / Barber, Thomas W

    Journal of medical imaging and radiation oncology

    2020  Band 65, Heft 1, Seite(n) 54–59

    Abstract: Introduction: Suppression of physiological myocardial FDG activity is vital in patients undergoing PET/CT for assessment of known or suspected cardiac sarcoidosis. This study aims to evaluate the efficacy of physiological myocardial FDG suppression ... ...

    Abstract Introduction: Suppression of physiological myocardial FDG activity is vital in patients undergoing PET/CT for assessment of known or suspected cardiac sarcoidosis. This study aims to evaluate the efficacy of physiological myocardial FDG suppression following a protocol change to a 24-h high fat very low carbohydrate (HFVLC) diet and prolonged fast.
    Methods: A retrospective review of patients undergoing FDG PET/CT for the evaluation of cardiac sarcoidosis was performed. Prior to June-2018, patients were prepared with a single very high-fat low carbohydrate meal followed by a 12-18 h fast (group 1). After June-2018, a protocol change was initiated with patients prepared with a HFVLC diet for 24-h followed by a 12-18 h fast (group 2). Focal myocardial activity was classified as positive, absent activity as negative and diffuse/focal on diffuse activity as indeterminate.
    Results: A total of 94 FDG PET/CT scans were included with 46 scans in group 1 and 48 scans in group 2. Studies were classified as positive, negative or indeterminate in 25 (54%), 7 (15%) and 14 (30%) scans in group 1 and in 13 (27%), 33 (69%) and 2 (4%) scans in group 2, respectively. In scans classified as negative, myocardial FDG activity was less than mediastinal blood pool activity in 5/7 (71%) scans in group 1 and 33/33 (100%) scans in group 2.
    Conclusion: Excellent myocardial FDG suppression can be achieved using a 24-h HFVLC diet and prolonged fast, resulting in a very low indeterminate scan rate in patients with known or suspected cardiac sarcoidosis.
    Mesh-Begriff(e) Fluorodeoxyglucose F18 ; Humans ; Myocardium ; Positron Emission Tomography Computed Tomography ; Positron-Emission Tomography ; Radiopharmaceuticals ; Retrospective Studies ; Sarcoidosis/diagnostic imaging
    Chemische Substanzen Radiopharmaceuticals ; Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Sprache Englisch
    Erscheinungsdatum 2020-10-25
    Erscheinungsland Australia
    Dokumenttyp Journal Article
    ZDB-ID 2389687-5
    ISSN 1754-9485 ; 1440-1673 ; 1754-9477 ; 0004-8461
    ISSN (online) 1754-9485 ; 1440-1673
    ISSN 1754-9477 ; 0004-8461
    DOI 10.1111/1754-9485.13121
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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