Japanese Journal of Radiological Technology
Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305
3. TECHNICAL PROBLEMS OF TBI IN CASE OF THE MOVING COUCH METHOD
MASAYUKI TSUDA
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Keywords: TBI, Moving Couch
JOURNAL FREE ACCESS

1991 Volume 47 Issue 12 Pages 2043-2048

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Abstract

In Tokai University Hospital ever since 1982, TBI for bone marrow transplantation has been performed by the moving couch method. In this method, the patient is irradiated from the opposite direction of A-P and P-A in a comfortable supaine position as is. This technique has been well studied and greatly improved. For example, the moving speed of the couch is automatically varied depending on the dose rate deviation of the electron linear accelerator, function having variable speed with the dose rate (VSDR). Another function in variable speed with division (VSDV). In addition it has a self-recording function for the actual condition for the dose and couch movement. In such small areas as the eyes and gonad, the shielding effect cannot be effectively used. For the lungs, but it is able to shield and compensate to a sufficient extent. It applied to actual treatment resulting from data obtained from the measurements using a phantom. During the irradiation we must check the reproducibility of the systems which are dose rate, couch position, and so on. This is one reasonable concept of the dose monitor.

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© 1991 Japanese Society of Radiological Technology
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