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    Clinical implementation of dynamic multileaf collimation for compensated bladder treatments.

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    Authors
    Budgell, Geoff J
    Mott, Judith
    Logue, John P
    Hounsell, Alan R
    Affiliation
    North Western Medical Physics, Christie Hospital NHS Trust, Wilmslow Road, Withington, M20 4BX, Manchester, UK.
    Issue Date
    2001-04
    
    Metadata
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    Abstract
    BACKGROUND AND PURPOSE: To describe the clinical implementation of dynamic multileaf collimation (DMLC). Custom compensated four-field treatments of carcinoma of the bladder have been used as a simple test site for the introduction of intensity modulated radiotherapy.MATERIALS AND METHODS: Compensating intensity modulations are calculated from computed tomography (CT) data, accounting for scattered, as well as primary radiation. Modulations are converted to multileaf collimator (MLC) leaf and jaw settings for dynamic delivery on a linear accelerator. A full dose calculation is carried out, accounting for dynamic leaf and jaw motion and transmission through these components. Before treatment, a test run of the delivery is performed and an absolute dose measurement made in a water or solid water phantom. Treatments are verified by in vivo diode measurements and real-time electronic portal imaging. RESULTS: Seven patients have been treated using DMLC. The technique improves dose homogeneity within the target volume, reducing high dose areas and compensating for loss of scatter at the beam edge. A typical total treatment time is 20 min. CONCLUSIONS: Compensated bladder treatments have proven an effective test site for DMLC in an extremely busy clinic.
    Citation
    Clinical implementation of dynamic multileaf collimation for compensated bladder treatments. 2001, 59 (1):31-8 Radiother Oncol
    Journal
    Radiotherapy and Oncology
    URI
    http://hdl.handle.net/10541/83354
    PubMed ID
    11295203
    Type
    Article
    Language
    en
    ISSN
    0167-8140
    Collections
    All Christie Publications

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