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    Radiation protection to the eye and thyroid during diagnostic cerebral angiography: a phantom study.

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    Authors
    Shortt, C P
    Malone, L
    Thornton, J
    Brennan, P
    Lee, M J
    Affiliation
    Department of Radiology, Beaumont Hospital, Dublin, Ireland.
    Issue Date
    2008-08
    MeSH
    Bismuth
    Cerebral Angiography
    Eye Diseases
    Humans
    Lead
    Phantoms, Imaging
    Radiation Dosage
    Radiation Injuries
    Radiation Protection
    Radiometry
    Relative Biological Effectiveness
    Thyroid Diseases
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    Citation
    Radiation protection to the eye and thyroid during diagnostic cerebral angiography: a phantom study. 2008, 52 (4):365-9 J Med Imaging Radiat Oncol
    Journal
    Journal of medical imaging and radiation oncology
    URI
    http://hdl.handle.net/10147/136777
    DOI
    10.1111/j.1440-1673.2008.01970.x
    PubMed ID
    18811760
    Additional Links
    http://www.ncbi.nlm.nih.gov/pubmed/18811760
    Abstract
    We measured radiation doses to the eye and thyroid during diagnostic cerebral angiography to assess the effectiveness of bismuth and lead shields at dose reduction. Phantom head angiographic studies were performed with bismuth (study 1) and lead shields (study 2). In study 1 (12 phantoms), thermoluminescent dosimeters (TLD) were placed over the eyes and thyroid in three groups: (i) no shields (four phantoms); (ii) anterior bismuth shields (four phantoms) and (iii) anterior and posterior bismuth shields (four phantoms). In a second study (eight phantoms), lead shields were placed over the thyroid only and TLD dose measurements obtained in two groups: (i) no shielding (four phantoms) and (ii) thyroid lead shielding (four phantoms). A standard 4-vessel cerebral angiogram was performed on each phantom. Study 1 (bismuth shields) showed higher doses to the eyes compared with thyroid (mean 13.03 vs 5.98 mSv, P < 0.001) and a higher eye dose on the X-ray tube side. Overall, the use of bismuth shielding did not significantly reduce dose to either eyes or thyroid in the measured TLD positions. In study 2, a significant thyroid dose reduction was found with the use of lead shields (47%, mean 2.46 vs 4.62 mSv, P < 0.001). Considerable doses to the eyes and thyroid highlight the need for increased awareness of patient protection. Eye shielding is impractical and interferes with diagnostic capability. Thyroid lead shielding yields significant protection to the thyroid, is not in the field of view and should be used routinely.
    Item Type
    Article
    Language
    en
    ISSN
    1754-9485
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1440-1673.2008.01970.x
    Scopus Count
    Collections
    Beaumont Hospital

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