Subject(s)
Patient Care Planning , Radiotherapy/methods , Humans , Planning Techniques , Radiotherapy DosageABSTRACT
The authors substantiated the effectiveness of local irradiation of the parasternal lymph node chain by means of cylindrical 60Co sources of original design. Sizes of the sources: total length--65 mm, active length--60 mm, external diameter--1 mm. This type of irradiation as part of combined and multimodality therapy was used in 112 patients. This method is easy to perform and well tolerated by patients.
Subject(s)
Brachytherapy/methods , Breast Neoplasms/radiotherapy , Cobalt Radioisotopes/administration & dosage , Breast Neoplasms/diagnostic imaging , Catheterization/instrumentation , Catheterization/methods , Combined Modality Therapy , Female , Humans , Ligation/methods , Lymphatic Metastasis , Postoperative Care , Radiography , Radiotherapy Dosage , Sternum , Thoracic Arteries/surgeryABSTRACT
The authors proposed the use of absorbed doses in standard regimens of irradiation to illustrate end-effects of unconventional variations of radiation therapy. They proposed that such doses should be defined as "biological isoeffective doses under standard conditions of radiation therapy" or, in short, "standard isoeffective doses". Three standard regimens of irradiation were described: separately for beta-beam, for continuous interstitial and fractional intracavitary radiotherapy. It was proposed that a standard isoeffective dose value should be expressed in "isogray" abbreviated as (i) Gy.
Subject(s)
Radiotherapy Dosage , HumansABSTRACT
The authors compared the results of the designing of interstitial irradiation using the Paris system and the optimum scheme of placing radiation sources. The qualities of formed dose fields were compared by 5 criteria characterizing a dose field at the border, in the center and beyond the target as well as its homogeneity by volume. The correlation showed the advantages of planning using optimal schemes in volumes with an elliptical and irregular section by the criteria of homogeneity of target contour irradiation, the lessening of radiation exposure beyond the target and an increase in the absolute value of minimum dose rate at the border of an irradiated volume.
Subject(s)
Brachytherapy/methods , Neoplasms/radiotherapy , Radiotherapy Dosage , Humans , Models, BiologicalABSTRACT
The authors presented the immediate and 3-year results of interstitial and combined therapy of 90 patients with cancer of the tongue and oral fundus mucosa. 60Co- and 252Cf-sources were employed in interstitial radiotherapy. There were no significant differences in therapeutic efficacy using different radiation sources. Some methodological aspects of administration of interstitial radiotherapy, radiation reactions and complications were covered.
Subject(s)
Brachytherapy , Californium/therapeutic use , Cobalt Radioisotopes/therapeutic use , Mouth Neoplasms/radiotherapy , Tongue Neoplasms/radiotherapy , Adult , Aged , Carcinoma, Squamous Cell/radiotherapy , Female , Humans , Male , Middle Aged , Mouth FloorABSTRACT
Dosimetric studies were performed by means of a specially designed phantom schematically simulating the anatomy of the female pelvis, to investigate into the dose distribution of interstitial gamma-therapy. Measurements were done during the simulation of tumor irradiation in 4 regions of the vagina: in the anterior and posterior walls, in the lower and upper thirds. The urinary bladder posterior wall received the largest dose during irradiation of the anterior vaginal wall, whereas the anterior rectal wall during irradiation of the posterior vaginal wall. In comparing the calculated and experimental dosimetric data one can mark their coincidence within 20%. The authors also provide the results of a study of the radiation-hygienic working conditions of the staff responsible for administering interstitial radiation therapy.
