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Biomedical subjects

A G Nadtochiĭ

Publications and source records attributed to A G Nadtochiĭ.

13 recordsLinked to original sources
PubMedDate not supplied

[Magnetic resonance imaging and ultrasound study in the diagnosis og facial angiodysplasias in children: competition or collaboration?].

This study deals with the capacities of noninvasive magnetic resonance imaging (MRI) with magnetic resonance angiography (MRA) without administration of magnetic resonance contrast substances in the diagnosis of facial soft tissue angiodysplasias in children. Indications for their use are defined. The methodology of the studies is proposed. Their diagnostic role and relationship with the other noninvasive technique of medical visualization--ultrasound study (USS) with Doppler color mapping (DCM) are assessed. As compared with USS, MRI may more accurately and objectively establish the organotopic characteristics of facial soft tissue angiodysplasias and detect lesions of the deep facial parts, maxillary bones, and paranasal sinuses in the diagnosis of these abnormalities. The use of MRI may define the belonging of angiodysplasias to the arterial or venous bed, reveal afferent and efferent vessels, including intracranial ones, and to detect intracranial angiodysplastic changes. USS with DSM was superior to MRI with MRA in defining functional (hemodynamic) parameters of angiodysplasias, which makes this method indispendable in planning treatment and in evaluating its efficiency. Comprehensive examination of patients with large and extensive angiodysplasias of facial soft tissues has indicated that facial angiodysplasias are external manifestations of a more generalized angiodysplastic process in most cases, which, in large and extensive facial angiodysplasias, makes it expedient to perform MRI with MRA of the brain and, if possible, the whole body. The high informative value of MRI with MRA in studying angiodysplasias makes them the method of choice in the diagnosis of this group of diseases.

Adolescent↗
PubMedDate not supplied

[The x-ray anatomy of the maxilla on orthopantomograms].

The article presents the results of experimental study of the degrees of projective enlargement and deformation of images of different maxillary regions, and the mechanism of maxillary image formation on the orthopantomograms are discussed. The detailed schematic design of the upper jaw and surrounding anatomical formations is presented as seen on orthopantomograms. This is essential for a reliable assessment of possible distortions.

Humans↗
PubMedDate not supplied

[Clinical and x-ray characteristics of the periodontium in Sjögren's disease].

Clinical and X-ray examination of parodont was performed in 35 patients with Sjögren disease and 35 control patients. Osteal parodont X-ray examination was performed using the techniques of panorama and orthopantomography. As a result of clinical and X-ray investigation, the patients showed a lesser degree of the diffuse osseal parodont resorbtion as compared to controls that was evidenced by a lack of clinical manifestations of the parodont inflammation. This is possibly due to the absence, in a majority of the patients, of the mineralized dental concrements. The focal inflammatory disorders were connected to local trauma factors.

Adult↗
PubMedDate not supplied

[Traditional echography and dopplerography in the diagnosis of vascular neoplasms of the maxillofacial area in children].

Twelve patients with hemangiomas of maxillofacial soft tissues aged 9 months to 15 years were examined by B-mode echography and color doppler imaging of the bloodstream. Combination of these two methods helps confirm the presence of a vascular neoformation, assess its dissemination, volume, and syntopy, specify the morphological variant of its structure, evaluate bloodstream velocity in various parts of the neoplasm. The notion of bloodstream intensity is introduced for the first time, reflecting the number of actively functioning vessels per unit of tumor volume. Causes of artefact appearance have been detected and approaches to their elimination out outlined. Echographic signs permitting selection of the optimal treatment strategy for each patient have been defined.

Adolescent↗
PubMedDate not supplied

[The echographic diagnosis of lymphangiomas of the maxillofacial area in children].

Clinical and ultrasonic examinations of 26 patients aged 11 months to 12 years with maxillofacial lymphangiomas were carried out. Seventeen patients were operated on, and echographic findings were verified in them. The results indicate that ultrasonic examinations permit a sufficiently accurate assessment of lymphangioma morphologic structure and dissemination and help define its position in relation to significant anatomic maxillofacial and cervical structures and detect the complications in its course. High informative value of this noninvasive, available, and unsophisticated method recommend its wide use in the diagnosis of maxillofacial lymphangiomas in children.

Child↗