[Radiation synovectomy in orthopedic and rheumatologic daily routine].

Radionuclide synoviorthesis (RSO) is a local radiotherapy that can be used in cases of synovialitis. RSO is performed by intraarticular injection of beta emitters (Er-169, Re-186, Y-90). Before RSO is planned, a precise indication is necessary, which must be verified by the acting nuclear physician, preferably using soft-tissue scintigraphy.

[Multicenter study of radiosynoviorthesis. Clinical outcome in osteoarthritis and other disorders with concomitant synovitis in comparison with rheumatoid arthritis].

Aim: Evaluation of the effectiveness of radiosynoviorthesis (RSO) in osteoarthritis and other disorders with concomitant synovitis versus rheumatoid arthritis by means of a standardized questionnaire.

Patients, Methods: 803 RSO treatments were monitored in 691 patients by standardized questionnaires of 7 centers in 3 countries. Patients were assigned to 3 groups according to their age (20-40, 41-60, 61-80 years).

Pulmonary thromboembolism: a retrospective study on the examination of 991 patients by ventilation/perfusion SPECT using Technegas.

Purpose: Conventional planar ventilation/perfusion (V/P)-imaging in those patients suspected of suffering from pulmonary thromboembolism (PTE) is of limited diagnostic value. It is the purpose of this retrospective study to determine whether the use of V/P-SPECT using Technegas might reduce the rate of those diagnostic uncertainties and might lead to better results.

Methods: 991 patients (660 female, 331 male, age 18-90, mean 60), referred to our laboratory with suspected PTE, were examined as follows: patients inhaled 37 MBq of Technegas in the supine position and a SPECT-acquisition was started.

Technegas: a study of particle structure, size and distribution.

Technegas (TcG) was produced using a commercially available TcG generator. The structure and size distribution of TcG particles were examined by means of the following methods: (a) transmission electron microscopy (TEM), range: 1 nm-100 microns; (b) time-of-flight mass spectroscopy (MS), range: < 3 nm; (c) photon correlation spectroscopy (PCS), range: 3 nm-3 microns. The TEM images showed graphite particles (size 7-23 nm) agglomerated into larger secondary aggregates.

Characteristics of human saccadic eye movements in different directions.

Saccadic human eye movements in different directions were recorded by an infrared technique. Disturbances by movements of the eyelids are prevented by means of a plaster pulling down the lower lid. The peak values of the velocity, acceleration, deceleration, and the duration of the saccades were drawn in a direction diagram.