[en] A 480 GBq ⁶⁰Co source and a Geiger-Mueller counter were used to locate a cavity in a church wall. Measurements were performed in the nodes of a 30x30 cm square net and the probe was transferred by hand. Each measurement took about 10 s. For wider applications, the development of some equipment for remotely moving the probe and, eventually, the source seems necessary. Radiography, being a nondestructive method, can be recommended for use in archaeological surveys. (J.J.). 3 figs., 3 refs

[en] A group of 13 cases is presented of expansive cystic processes in the brain, where discrepancies have been found between CT findings and surgery or post mortem examination during the period 1982 to 1987. Two main groups of diseases are dealt with, viz., brain abscesses and cystic gliomas (mainly glioblastomas) where, in rare cases, the CT picture may be virtually identical. The authors characterize typical CT pictures of cystic gliomas and brain abscesses. Hyperdense ring lesions of the brain after a contrast with hypodense center in CT examination should necessarily be considered as a non-specific finding as it can be oberved in brain abscess as well as in glioblastomas, metastases and anaplastic astrocytomas. The finding of a thin hypodense uniform smooth capsule of a spherical shape with a homogeneous hypodense center is considered to be a characteristic CT sign of abscess. A thicker nodular or irregular hypodense border with a less homogeneous center rather indicates tumor. The quantitative evaluation of density either of the capsule or of the content should not be considered significant for any of the given groups of diseases. The differential diagnosis of these lesions proved that in addition to CT complex consideration should be paid to other important factors, such as accurate diagnosis, careful neurological and clinical examination and laboratory findings (blood count and FW). If diagnostic doubts remain, probatory puncture is the method of choice for safe exclusion of brain abscess. (author). 14 figs., 2 tabs., 12 refs

[en] Aim: to evaluate the changes of cerebral perfusion in patients after craniocerebral injury with clinical temporal conus syndrome. Material and methods: We present a group of 14 head injured patients admitted to neurosurgery with the syndrome of temporal herniation (Glasgow coma scale 3 - 5, homorateral dilated pupil and disturbed vital functions). There were 7 epidural, 6 subdural and one intracerebral hematomas. Mean age was 42, 7. All patients had urgent surgery and then continuous monitoring of vital functions. Results: Two postoperative CT and SPECT examinations were performed in each patient. Only 2 patients had visible ischemia on the first postoperative CT scan, both diet. 11 patients had ischemia in both the first post-operative and the follow up SPECT. 7 patients had improvement on the follow up SPECT compared to the first one, 6 of them were good results, one died. Conclusions: SPECT is very sensitive to impaired cerebral perfusion and may be helpful as a serial study. This is very mainly in the patients with reversible ischemia which may be influenced therapeutically with good results