ABSTRACT
Thirty four patients with tumors of the cerebellum and the fourth ventricle were examined. All the patients underwent craniography and computed tomography (CT), 28 had magnetic resonance imaging (MRI). According to the histological pattern, the tumors were divided as follows: astrocytomas in 14 patients, hemangioblastomas in 8, ependymomas of the fourth ventricle in 5, medulloblastomas in 3, choriopapillomas in 2, two patients were found to have metastases. MRI was shown to be the most informative technique in the diagnosis of bulky abnormal formations of the cerebellum and the fourth ventricle of the cerebrum. The maximum degree of contrast between normal and damaged tissue provides evidence for correctly establishing a tumor, determining its outlines, and relation to the brain stem and cerebrospinal system. The use of different pulse sequences with MRI makes it possible to have a more valid differential diagnosis. Computed tomography is an additional technique in examining patients with tumors of the cerebellum and the fourth ventricle to obtain data on the plain characteristics of an abnormal focus and their changes after intravenous reinforcement. The application of a complex of radiation studies leads to the conclusion that the bulky abnormal formations of the cerebellum and the fourth ventricle are likely to be morphologic.
Subject(s)
Astrocytoma/diagnosis , Cerebellar Neoplasms/diagnosis , Cerebral Ventricle Neoplasms/diagnosis , Ependymoma/diagnosis , Hemangioblastoma/diagnosis , Medulloblastoma/diagnosis , Adolescent , Adult , Aged , Cerebellum/diagnostic imaging , Cerebellum/pathology , Cerebral Ventricles/pathology , Diagnosis, Differential , Female , Humans , Magnetic Resonance Imaging , Male , Middle Aged , Tomography, X-Ray ComputedABSTRACT
1035 patients of suspected brain formations have been examined in a low-field magnetic resonance tomography (MPT) study. Various patterns of brain tumors were identified in 772 cases and diagnosis was verified by other procedures. Among the most frequent were neuro-epithelial tumors (157), meningiomas (161) and metastatic lesions (136). The MRT technique condition suggest histological pattern. Although less expensive and easier to service, low-field MRT's yield as much information for brain tumor diagnosis as medium- and high-field tomographs do.
Subject(s)
Brain Neoplasms/diagnosis , Magnetic Resonance Imaging , Adult , Aged , Brain Neoplasms/secondary , Female , Humans , Magnetic Resonance Imaging/methods , Male , Middle AgedABSTRACT
Magnetic resonance (MR) study of the brain using a low-field imager (0.04 T) was carried out in 1035 patients with suspected brain tumors which were detected and confirmed in 593 cases. The most frequent findings were neuroepithelial tumors, meningiomas, hypophyseal adenomas, and various metastatis lesions. MR features of various types were analyzed. Low-field MR imaging helps detect tumors even of smaller size, localize them, determine their dissemination and the status of the adjacent tissues, thus providing (similarly as high- and middle-field MR imaging) valuable diagnostic information.
Subject(s)
Brain Neoplasms/diagnosis , Brain Neoplasms/classification , Electromagnetic Fields , Humans , Reproducibility of ResultsSubject(s)
Radiography/trends , Humans , Radiography/economics , Radiography/statistics & numerical data , USSRABSTRACT
A 5-year experience with fluorographic examination of the population of Leningrad is described. The data show that it is untimely to prolong the intervals between check fluorographic examinations. Difficulties in forming the risk groups are also indicated. Ways for improving organization of fluorographic examinations by using the available reserves are defined. On the whole, the present arrangement of prophylactic fluorographic examinations is rather efficient in regard to early detection of many pulmonary diseases including tuberculosis and peripheral cancer of the lungs.
Subject(s)
Lung Diseases/prevention & control , Mass Screening/organization & administration , Urban Population , Humans , Mass Screening/methods , Photofluorography , RussiaSubject(s)
Arteriovenous Fistula/etiology , Catheterization/adverse effects , Hepatic Artery/injuries , Portal Vein/diagnostic imaging , Hepatic Artery/diagnostic imaging , Humans , Liver Cirrhosis/complications , Liver Cirrhosis/diagnostic imaging , Male , Middle Aged , Punctures/adverse effects , RadiographySubject(s)
Aorta/physiology , Heart/physiology , Pressure , Adolescent , Adult , Aortic Valve , Blood Pressure , Child , Child, Preschool , Coronary Disease/physiopathology , Female , Heart Valve Diseases/physiopathology , Heart Ventricles , Humans , Hypertension/physiopathology , Male , Middle Aged , Vascular ResistanceABSTRACT
It is found that the main indices determined in catheterization and ventriculography of the left ventricle still provide insufficient information. This is displayed by their considerable variations under normal conditions (conventional normal values). The functional left ventricular volumes vary least in adults; the ejection fraction is most informative. Contraction of the longitudinal axis of the left ventricle and of its transverse diameters and the circular rate of myocardial contraction are most variable. It is necessary to generalize a great scope of material to obtain the normal sex and age values of all indices.
