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Calculation of cross-couplings between the tracking system axes in TM01-mode monopulse antenna with respect to ellipticity coefficients of a receiving antenna and the incident field is performed. Pointing correction paths are given for diverse values of ellipticity coefficients and angular directions of the incident wave. Acceptable values of ellipticity coefficients for the robust performance of tracking system are determined.

A retrospective analysis of the results of puncture thyroid biopsy is presented in 256 patients operated on for nodular goiter. Cytological data coincided with histological in 84.8% of cases. Coincidences were most frequent with (multiple) nodular colloid goiter and thyroid cysts (95.7 = 100%) and the least with a single adenoma (65.4%) of predominantly follicular structure. In thyroid cancer, the data correlated in 75% of cases. The presence of cystic changes in the adenoma made the study less informative. The results of an ultrasound examination of the thyroid gland coincided with operational data in 87.5% of patients with (multiple) nodular goiter and in 86.1% of patients with adenomas. Ultrasonography as a method of imaging the thyroid gland is preferable to scintigraphy (scanning) and is the optimal complement to the thyroid puncture biopsy.