摘要:

This method of graphic projection of isodose curves for linear radium sources was devised to enable isodose charts to be used for the determination of two orthogonal films of a radium applicator. The commonest use for these charts is dosage calculation in radium therapy of cancer of the cervix uteri according to the method described by Fletcher, Wall, Bloedorn, Shalek and Wootton (1953). A contour of the pelvic brim with the position of the radium sources in the tandem and in the ovoids is traced on transparent paper on the antero-posterior film. Isodose charts of the three components of the radium applicator are then placed under the contour, superimposed on one another, on an illuminator. In most cases, however, the longitudinal axis of the tandem lies on a plane oblique to the frontal plane of the pelvis (Fig. 1). Therefore, the angle of the tandem to the frontal plane should be first measured on the lateral film and then the appropriate chart should be applied to the tandem as seen in the antero-posterior film. Sets of isodose charts for the various combination of sources in the tandem at various angulations from 0 to 90 deg. are therefore required in order to assess the dose distribution within the pelvic cavity.Besides dose calculation in cancer of the cervix, this method may be used for determination of dose distribution on films taken for localisation of any other application of linear sources of radium or radioactive isotopes.

DOI:10.1259/0007-1285-32-374-140

出版商:The British Institute of Radiology    

年代:1959

数据来源: WILEY

摘要:

In this short monograph the author assesses the method of kymography in the study of the oesophagus with reference to secondary malignant diseases of the mediastinum due to primary bronchial carcinoma.

DOI:10.1259/0007-1285-32-374-142-b

出版商:The British Institute of Radiology    

年代:1959

数据来源: WILEY