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Biomedical subjects

G G Nikolaev

Publications and source records attributed to G G Nikolaev.

12 recordsLinked to original sources
PubMed1991

[Roentgenological diagnosis of injuries of the tibiofibular syndesmosis].

Under study there were 23 patients without alterations in the area of tibiofibular syndesmosis, 53 patients with isolated injuries and 132 patients with associated injuries in the area of syndesmosis. Roentgenogrammetry (calculation of the tibiofibular index) and special filtration of the roentgenogram picture were performed. Roentgenogrammetric indices of ruptures of syndesmosis and peculiarities of bone injuries at the level of syndesmosis were established.

Adolescent↗
PubMedDate not supplied

[Image processing of thymus tumors].

Altogether 40 thymic tumor patients were investigated. Radiograms and pneumomediastinograms were subjected to processing aposteriori (increased contrast and spatial filtration). Spatial filtration improved selective analysis of spatial frequencies of imaging. Processing of images specified diagnosis of thymomas by underlining the shapes of normal and abnormal mediastinal formations and signs of invasion of the pericardium and pleura.

Adolescent↗
PubMedDate not supplied

[X-ray diagnosis of ruptures of the distal radioulnar joint].

The paper describes 42 intact, 14 damaged and 52 ruptured radioulnar joints. The joints width was measured, the radioulnar index calculated, x-ray pictures filtered. Variants of isolated injuries of the joints in different bone dislocation, changes in combined ruptures and injuries are described. The radioulnar index proved the best in quantitation of the joint damage.

Adult↗
PubMedDate not supplied

[Diagnosis of postoperative changes in the frontal and maxillary sinuses].

The paper specifies x-ray picture of surgically treated frontal and maxillary sinuses in uneventful healing without inflammation relapses (30 cases), in relapse of purulent (21 sinuses), purulent-polypous (15 sinuses), polypous (4 sinuses) sinusitis, in pain syndrome in the region of the operated on maxillary sinus projection (7 patients). X-ray symptoms of postoperative changes in the sinuses, varying in clinical course, are characterized.

Adult↗
PubMedDate not supplied

[Image processing of thymus gland tumors].

Altogether 40 thymic tumor patients were investigated. Radiograms and pneumomediastinograms were subjected to processing a posteriori (increased contrast and spatial filtration). Spatial filtration improved selective analysis of spatial frequencies of imaging. Processing of images specified diagnosis of thymomas by underlining the shapes of normal and abnormal mediastinal formations and signs of invasion of the pericardium and pleura.

Adolescent↗
PubMedDate not supplied

[Unit for the registration of cinekymograms].

The principle underlying the action of basic subassemblies of the appliance for registration of kymographic curves from roentgenocinemafilms is described. A comparison of the cinemakymographic method with that of electrokymography is given and advantages of the proposed method are indicated.

Cineradiography↗
PubMedDate not supplied

[The use of spatial image filtration in the diagnosis of tumors and tumor-like processes of the jaws in children].

34 children were examined for tumours and tumor-like jaws diseases odontomas, giant cell tumours, fibrous osteodysplasias, epulides, eosinophilic granulomas. Roentgenograms and tomograms of the patients have undergone space filtration on the device for the DAR-2 roentgenogram analysis with separation of the upper and middle space frequencies of the picture. Space filtration separated features of the picture having differentially diagnostic meaning and characterizing the particularities of the tumour structure, it's bone border, alteration of the surrounding soft tissues.

Adolescent↗