[Estimate of the dose in the marrow and the gonads of patients undergoing neoplastic treatment with telecobalt therapy (author's transl)].

Measurements of the doses were carried out on phantoms in order to determine the dose in the marrow and gonads of patients undergoing radio-therapeutic treatment with telecobalt therapy with fixed fields. On average, the dose in the marrow for each treatment resulted to be 2.35 Gy in the male and 5.

[Determination of the genetically significant dose from x-ray diagnosis in the Province of Varese (author's transl)].

The genetically significant dose in the population of Varese Province (about 700,000 inhabitants) from X-ray diagnosis in 1972 has been estimated. The methods adopted and data utilized for the estimate are indicated. Results are discussed in view of the possibility of reducing doses.

[Calculation of physical parameters of 137 Cs sources for intracavitary radiotherapy (author's transl)].

Estimate of effective activity and energy absorption values for sealed 137Cs sources for use in intracavitary radium therapy, values utilizable for computerized dosimetry; for this purpose the radio-equivalent value provided by the manufacturer would not appear to be utilizable.

[Photographic dosimetry in irradiation of the mediastinum (author's transl)].

Photographic dosimetry was used to ascertain the space distribution of the dose in mediastinal irradiation with sagittal median fields by means of cobalt therapy; the discrepancy between values in tissue-equivalent dummy and homogeneous dummy was minor and is discussed; comparisons are also made with computer values.

[Distribution of dosage and estimation of dosage absorbed by critical organs in the fields of irradiation of lymphomas].

Dose distribution in blanket irradiation was determined using the photodensitometer in a life-size dummy; doses in critical tissues (especially heart, spinal cord, bone marrow) are discussed with reference to likely biological risks.