A New Tissue-Like Material for Use as Bolus
| Autor: | Duncan D. Lindsay, Babette E. Stern |
|---|---|
| Rok vydání: | 1953 |
| Předmět: | |
| Zdroj: | Radiology. 60:355-362 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/60.3.355 |
| Popis: | Charts and tables for the determination of x-ray dosage are based on measurements made in phantoms of regular shapes. In clinical practice the body surface on which the beam impinges is often irregular. In order to plan treatment so that doses can be correctly determined, it is necessary to provide a regular surface by filling in with bags of bolus material. This is particularly important with tangential or acutely slanted beams such as are used in irradiation of the chest wall following breast operations, and in regions such as the axilla or about the jaw. The need for use of such material is generally accepted, although the degree of its importance is not always appreciated. Various materials have been used for this purpose, most of which have been open to some objection. Early bolus materials such as rice, bicarbonate of soda, etc., used singly, have been shown by Spiers (1) to have atomic characteristics which make them poor representations of “average tissue” in so far as the absorption and scatterin... |
| Databáze: | OpenAIRE |
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