scholarly journals CLINICAL ANATOMY OF RAT'S SALIVARY GLANDS

2020 ◽  
Vol 19 (4) ◽  
pp. 37-42
Author(s):  
I. Herasymiuk
Keyword(s):  
Salivary Glands ◽  
Spatial Organization ◽  
Aqueous Suspension ◽  
Outer Part ◽  
Ventral Surface ◽  
The Body ◽  
Clinical Anatomy ◽  
Lateral Projection ◽  
X Ray ◽  
Outer Corner

In an experiment found that the parotid salivary gland in rats, unlike people, located on ventrolateral surface of the neck behind the ear and reach the outer part of the clavicle. Straits form three main trunks which penetrate the mouth. Mandibular salivary glands (submandibular salivary glands counterparts in humans) are located on the ventral surface of the neck, on the way from the hyoid bone to the handle of the sternum, touching each other by their medial edges. Stereometric parameters obtained branching blood vessels can form the basis for comparison and setting the dynamics of pathological changes in modeling various pathological processes. The similarity in the structural organization of organs and tissues of humans and animals determines the use of the latter for experimental modeling of pathological processes manifested in the clinic. At the same time, for a detailed understanding of the dynamics of modeled pathological conditions and an adequate interpretation of the results obtained, one should take into account the species characteristics and those differences that are characteristic of animals of different species, as well as refer to the initial values of the quantitative characteristics of their tissues, organs and systems. The spatial organization of the bloodstream was studied by contrast X-ray angiography. For this, the arterial bed was injected with an aqueous suspension of red lead. In order to eliminate the superimposed shadows of the contralateral vessels, a sagittal cut of the head was performed before X-ray angiography with the removal of the brain along with the branching of the internal carotid artery. Radiography was performed without the use of an intensifying screen in lateral projection using a Koch & Sterzel apparatus. Rats normally have four pairs of large salivary glands: parotid, mandibular, large and small sublingual. The largest are the parotid and mandibular. The features of the structure, size and location of the salivary glands in rats are determined both by the features of the structure of the skull and the horizontal position of the body, and by the features of the functional purpose of the glands themselves. The largest of the salivary glands is the parotid. The ducts are formed from three main trunks and, bypassing the masticatory muscle along the surface, penetrate into the oral cavity. To the front edge of the gland, the lacrimal gland is quite tightly attached, the duct of which passes to the outer corner of the orbit. 

Slot-Radiography. New Possibilities of Radiation Diagnostics

2019 ◽  
Vol 64 (1) ◽  
pp. 74-79
Author(s):  
А. Левитов ◽  
A. Levitov ◽  
В. Дога ◽  
V. Doga ◽  
Г. Белицкая ◽  
...  
Keyword(s):  
Longitudinal Axis ◽  
Standing Position ◽  
The Body ◽  
Spinal Instability ◽  
Pathological Changes ◽  
Large Area ◽  
Lateral Projection ◽  
X Ray ◽  
Straight Beam ◽  
Wide Range

Slot-radiography is an x-ray examination in which a two-dimensional radiography with a straight beam and further computer stitching of the images obtained on the workstation during a single-pass of x-ray tube over a patient. The application of innovative techniques for image acquisition and processing in combination with a large-area flat panel detector (FPD) makes it possible to produce long-view images from one to several anatomical regions. During the investigation, the x-ray tube and the FPD move simultaneously at a constant speed in parallel relative to one another with the longitudinal axis of the body. Thus, it makes possible to obtain images with little distortion and processed images without visual defects. And this allows conducting more accurate diagnosis of pathological changes. Slot-radiography can be performed both in the patient’s standing position and lying down depending on the region of interest and tasks. It is possible to obtain images in both a frontal and a lateral projection without loss of quality. Slot-radiography is effectively used to diagnose pathological changes in joints and spine, including scoliosis, limb shortening, segmental spinal instability, pathology of lower limb veins, and also as a method for assessing the quality of the treatment. This technique is characterized by safety and convenience for the patient: minimal time costs and low radiation exposure. The application of this technique significantly increases the informative value of the x-ray examination, brings it to a qualitatively new level, providing a physician with a wide range of diagnostic possibilities.

scholarly journals Assessment of structural body imbalances in patients with temporomandibular joint dysfunction

2020 ◽  
pp. 49-57
Author(s):  
D. A. Rozhdestvensky ◽  
A. A. Stafeev ◽  
S. I. Soloviev ◽  
V. S. Mheyan ◽  
A. S. Rozhdestvensky
Keyword(s):  
Head And Neck ◽  
Temporomandibular Joint ◽  
Structural Changes ◽  
Positive Relationship ◽  
The Body ◽  
Temporomandibular Joint Dysfunction ◽  
Lateral Projection ◽  
X Ray ◽  
Primary Disorder ◽  
A Prospective Study

Introduction. Temporomandibular joint (TMJ) dysfunction is the second most common musculoskeletal disease, affecting up to 33 % of people during their lifetime. The multicomponent etiopathogenesis of the disease actualizes the use of diagnostic criteria for the early symptoms of developing functional disorders. The algorithm for preclinical examination of the TMJ must be used already in the dentist′s office, which will allow to avoid the unpredictable results of dental rehabilitation and in time to attract other specialists to the complex therapy of the patient. The etiopathogenesis of TMJ dysfunction indicates the need for a closer study of the mutual infl uence of structural imbalances in the body and dentition, the determination of the primary disorder, which will help to develop a system for the prevention of TMJ dysfunctions, and may also affect the sequence, volume and nature of the treatment for this pathology.The goal of research — to identify the relationship of structural imbalances in the body and temporomandibular joint dysfunction.Materials and methods. From September to December 2019, a prospective study of 70 volunteers among university students was conducted at the Department of Orthopedic Dentistry of Omsk State Medical University. During the processing of clinical material, 6 people retired in accordance with exclusion criteria. All subjects underwent an assessment of the state of the dentofacial system, primarily the TMJ (using a short Hamburg test) and structural imbalances of the body (using the Notch Interfaces Inc. motion capture and reconstruction system). To assess the cervical-cranial relationship in the subjects who had 3–6 points according to the results of the Hamburg test, a head X-ray was make in lateral projection, and cephalometric analyzes were performed according to Rocabado and Sassuni. The presence and strength of the linear relationship between the phenomena was determined using the Pearson coefficient.Results. According to the results of the Hamburg test, a functional norm was revealed in only 12,5 % of the examined; TMJ dysfunction was revealed in the vast majority of volunteers (57,9 %). Structural imbalances of the body were detected in 82,8 % of cases. Patients with established by the results of the Hamburg test TMJ dysfunction were underwent cephalometric analysis. Structural changes in the TMJ were not found in the subjects according to the X-ray studies results. There was a high positive relationship between functional TMJ dysfunction and pelvic hyperfl exion (ρ=0,72, p<0,05), and an average positive relationship (ρ=0,55, p<0,05) between the head and neck forward tilting. A positive weak relationship was observed between the risk of TMJ dysfunction developing (2 points according to the Hamburg test) and pelvic hyperfl exion (ρ=0,31, p<0,05).Conclusion. The study showed a strong positive relationship between pelvic hyperfl exion and TMJ dysfunction signs; an average positive relationship between TMJ functional impairment and head and neck forward tilting. It was also found that in individuals with TMJ dysfunction signs there were no radiological signs of structural changes in the joint, which indicates the potential reversibility of the revealed disorders and the need for their timely detection and correction. This study is pilot and will be continued in a broader format. 

X-ray micro tomography in the scanning electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 106-107 ◽  
Author(s):  
W. Brünger
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Target Surface ◽  
The Body ◽  
X Rays ◽  
Cross Sectional ◽  
X Ray ◽  
Micro Tomography ◽  
Scanning Electron

Reconstructive tomography is a new technique in diagnostic radiology for imaging cross-sectional planes of the human body /1/. A collimated beam of X-rays is scanned through a thin slice of the body and the transmitted intensity is recorded by a detector giving a linear shadow graph or projection (see fig. 1). Many of these projections at different angles are used to reconstruct the body-layer, usually with the aid of a computer. The picture element size of present tomographic scanners is approximately 1.1 mm2.Micro tomography can be realized using the very fine X-ray source generated by the focused electron beam of a scanning electron microscope (see fig. 2). The translation of the X-ray source is done by a line scan of the electron beam on a polished target surface /2/. Projections at different angles are produced by rotating the object.During the registration of a single scan the electron beam is deflected in one direction only, while both deflections are operating in the display tube.

Great Increase of Numbers of Virus Particles by Irradiating C3H Mouse Mammary Tumors Transplanted into Male Mice

1972 ◽  
Vol 30 ◽  
pp. 272-273
Author(s):  
P. J. Melnick ◽  
J. W. Cha ◽  
E. Samouhos
Keyword(s):  
Subcutaneous Tissue ◽  
Mammary Tumors ◽  
The Body ◽  
X Ray ◽  
Virus Particles ◽  
Mouse Mammary Tumors ◽  
Transplantable Tumors ◽  
C3h Mice ◽  
Cobalt Radiation ◽  
Enzyme Changes

Spontaneous mammary tumors in females of a high tumor strain of C3H mice were cut into small fragments that were Implanted into the subcutaneous tissue of the back of males of the same strain, where they grew as transplantable tumors. When about Cm. In diameter daily fractional radiation was begun, applied to the tumors, the rest of the body being shielded by a lead shield. Two groups were treated with 150 and 200 r X-ray dally, of half value layer 0.6mm. copper; a third group was treated with 500 r cobalt radiation dally. The primary purpose was to examine the enzyme changes during radiation, with histochemlcal technics.

February 9 — Dentist Day in Russia

2020 ◽  
pp. 78-81
Author(s):  
Oksana Rybachok
Keyword(s):  
Early Childhood ◽  
Oral Cavity ◽  
Salivary Glands ◽  
Spiritual Development ◽  
The Body ◽  
Mechanical Processing ◽  
Normal Functioning ◽  
Digestion Process ◽  
Quality Of Food

«Man is what he eats,» these words belong to the great Pythagoras. He meant by these words the connection of the origin of consumed food with the spiritual development of man. In fact, a lot depends on the nature of nutrition, the quality of food and, of course, on the degree of its perception by the body. Digestion process begins not in the stomach, but directly in the oral cavity as a result of mechanical processing of products with teeth and under the influence of the secretion of the salivary glands. That is why healthy teeth are the key to the normal functioning of the whole organism — people should start taking care of their teeth from the early childhood and dentists, who are far from being beloved by everybody and are often carelessly evaded, are called upon to help keep the teeth healthy.

THE TRENDS OF TUBERCULOSIS IN CHILDREN AGED 1- 12 YEARS AND ITS MANAGEMENT FROM 2011 TO 2015 AT ARTHUR DAVISON CHILDRENS HOSPITAL IN NDOLA: Retrospective study (Preprint)

2019 ◽  
Author(s):  
Martin Greta
Keyword(s):  
The Body ◽  
Smear Microscopy ◽  
Newly Diagnosed ◽  
X Ray ◽  
Children's Hospital ◽  
Co Morbidity ◽  
Children’S Hospital ◽  
Childhood Tb ◽  
Tuberculosis In Children ◽  
Age Range

BACKGROUND Tuberculosis is a widespread and in many cases a fatal, infectious disease caused by many strains of mycobacterium complex usually mycobacterium tuberculosis. It can affect any part of the body but mainly the lungs hence called pulmonary tuberculosis. Tuberculosis in children has been less of a public health priority in the recent years despite the fact that TB has been a major cause of childhood morbidity and mortality worldwide with difficulties in diagnosis. Data on trends of childhood TB is rarely in published literature hence need for this research which will help in publishing OBJECTIVE To establish the trends in TB among children aged 1-12 years and its management over a period of five years from 2011- 2015 at Arthur Davison children’s hospital in Ndola and also to determine the proportion of TB in these children and to establish the age group most affected by TB over the period of five years and lastly to assess the proportion of TB and HIV as a co-morbidity METHODS The study reviewed all records that were registered in the MOH TB register at ADH from 2011 to 2015 coming up with a total number of 483 TB records and these records had satisfied the inclusion and exclusion criteria. The data capturing tool was used to collect the data. RESULTS : This study determined the trends of TB in children aged 1 to 12 over the five years period from a total of 483 reviewed paediatric TB cases , its proportion in these children, the age range most affected by TB and lastly assessed TB and HIV as a co-morbidity at Arthur Davison Children’s hospital. It revealed that the trends were decreasing and that out of 483 TB patient, the majority 157(32.5%) of the TB patients were seen in the year 2011, followed by 129(26.7%), 84(17.4%), 57(11.8%) and 56(11.6%) representing the year 2012, 2013, 2014 and 2015 respectively. Findings on the age range most affected are that the majority 282(58.4%) of the TB patients were aged (5-12) years old while 201(41.6%) were aged between (1-5) years old. Therefore, the age range most affected by TB was between (5-12) years. The TB proportion results showed that Out of 483, the majority 467(96.7%) of the TB patient type were newly diagnosed, followed by 13(2.7%), 2(.4%) and the rest 1(.2%) that were Relapse, Trans-in and Treatment resumed respectively. And that many 467(96.7%) of TB condition types were PTB while 16(3.3%) were EPTB. Furthermore, the majority of 463(95.9%) were diagnosed by X-ray while 20(4.1%) were diagnosed by smear microscopy. And lastly In terms of HIV as a co-morbidity, the majority 175(36.2%) of the TB patients were HIV positive, followed by 173(35.8%) that were HIV negative while the rest 135(28%) of the TB patients were not tested for HIV CONCLUSIONS This study reports that the trends of TB in children aged 1-12 years have been decreasing from 2015 to 2011 .And the age range most affected was found to have been 5-12 years and the proportion of TB cases were mostly newly diagnosed and the diagnosis was made by use x-ray and lastly the large proportion of TB patients had tested positive for HIV as a co-morbidity. Therefore efforts should be made to sustain this decreasing trend of childhood TB.

Visualization of Invasion into the Body and Internal Diffusion of Nanoparticles

2008 ◽  
Vol 396-398 ◽  
pp. 569-572
Author(s):  
Fumio Watari ◽  
Shigeaki Abe ◽  
I.D. Rosca ◽  
Atsuro Yokoyama ◽  
Motohiro Uo ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Fluorescent Microscopy ◽  
The Body ◽  
Internal Diffusion ◽  
Whole Body ◽  
X Ray ◽  
Body Level ◽  
Organ Level ◽  
Level 2 ◽  
Internal Body

Nanoparticles may invade directly into the internal body through the respiratory or digestive system and diffuse inside body. The behavior of nanoparticles in the internal body is also essential to comprehend for the realization of DDS. Thus it is necessary to reveal the internal dynamics for the proper treatments and biomedical applications of nanoparticles. In the present study the plural methods with different principles such as X-ray scanning analytical microscope (XSAM), MRI and Fluorescent microscopy were applied to enable the observation of the internal diffusion of micro/nanoparticles in the (1) whole body level, (2) inner organ level and (3) tissue and intracellular level. Chemical analysis was also done by ICP-AES for organs and compared with the results of XSAM mapping.

scholarly journals Classification of Shoulder X-ray Images with Deep Learning Ensemble Models

2021 ◽  
Vol 11 (6) ◽  
pp. 2723
Author(s):  
Fatih Uysal ◽  
Fırat Hardalaç ◽  
Ozan Peker ◽  
Tolga Tolunay ◽  
Nil Tokgöz
Keyword(s):  
Deep Learning ◽  
Performance Test ◽  
The Body ◽  
Test Accuracy ◽  
Cohen’S Kappa ◽  
X Ray ◽  
Cohen's Kappa ◽  
Auc Value ◽  
Magnetic Resonance Imaging Mri ◽  
Fully Connected

Fractures occur in the shoulder area, which has a wider range of motion than other joints in the body, for various reasons. To diagnose these fractures, data gathered from X-radiation (X-ray), magnetic resonance imaging (MRI), or computed tomography (CT) are used. This study aims to help physicians by classifying shoulder images taken from X-ray devices as fracture/non-fracture with artificial intelligence. For this purpose, the performances of 26 deep learning-based pre-trained models in the detection of shoulder fractures were evaluated on the musculoskeletal radiographs (MURA) dataset, and two ensemble learning models (EL1 and EL2) were developed. The pre-trained models used are ResNet, ResNeXt, DenseNet, VGG, Inception, MobileNet, and their spinal fully connected (Spinal FC) versions. In the EL1 and EL2 models developed using pre-trained models with the best performance, test accuracy was 0.8455, 0.8472, Cohen’s kappa was 0.6907, 0.6942 and the area that was related with fracture class under the receiver operating characteristic (ROC) curve (AUC) was 0.8862, 0.8695. As a result of 28 different classifications in total, the highest test accuracy and Cohen’s kappa values were obtained in the EL2 model, and the highest AUC value was obtained in the EL1 model.

scholarly journals Non-destructive handheld XRF study of archaeological composite silver objects—the case study of the late Roman Seuso Treasure

2021 ◽  
Vol 13 (5) ◽  
Author(s):  
Viktória Mozgai ◽  
Bernadett Bajnóczi ◽  
Zoltán May ◽  
Zsolt Mráv
Keyword(s):  
Fluorescence Analysis ◽  
The Body ◽  
High Quality ◽  
X Ray ◽  
Composite Objects ◽  
Mechanical Attachment ◽  
Non Destructive ◽  
Made In ◽  
Late Roman

AbstractThis study details the non-destructive chemical analysis of composite silver objects (ewers, situlas, amphora and casket) from one of the most significant late Roman finds, the Seuso Treasure. The Seuso Treasure consists of fourteen large silver vessels that were made in the fourth–early fifth centuries AD and used for dining during festive banquets and for washing and beautification. The measurements were systematically performed along a pre-designed grid at several points using handheld X-ray fluorescence analysis. The results demonstrate that all the objects were made from high-quality silver (above 90 wt% Ag), with the exception of the base of the Geometric Ewer B. Copper was added intentionally to improve the mechanical properties of soft silver. The gold and lead content of the objects shows constant values (less than 1 wt% Au and Pb). The chemical composition as well as the Bi/Pb ratio suggests that the parts of the composite objects were manufactured from different silver ingots. The ewers were constructed in two ways: (i) the base and the body were made separately, or (ii) the ewer was raised from a single silver sheet. The composite objects were assembled using three methods: (i) mechanical attachment; (ii) low-temperature, lead-tin soft solders; or (iii) high-temperature, copper-silver hard solders. Additionally, two types of gilding were revealed by the XRF analysis, one with remnants of mercury, i.e. fire-gilding, and another type without remnants of mercury, presumably diffusion bonding.

scholarly journals Low-Temperature Synthesis of Solution Processable Carbon Nitride Polymers

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1646
Author(s):  
Junyi Li ◽  
Neeta Karjule ◽  
Jiani Qin ◽  
Ying Wang ◽  
Jesús Barrio ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Carbon Nitride ◽  
Spatial Organization ◽  
Surface Display ◽  
Liquid Media ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
X Ray ◽  
N2 Atmosphere ◽  
Carbon Nitride Materials

Carbon nitride materials require high temperatures (>500 °C) for their preparation, which entails substantial energy consumption. Furthermore, the high reaction temperature limits the materials’ processability and the control over their elemental composition. Therefore, alternative synthetic pathways that operate under milder conditions are still very much sought after. In this work, we prepared semiconductive carbon nitride (CN) polymers at low temperatures (300 °C) by carrying out the thermal condensation of triaminopyrimidine and acetoguanamine under a N2 atmosphere. These molecules are isomers: they display the same chemical formula but a different spatial distribution of their elements. X-ray photoelectron spectroscopy (XPS) experiments and electrochemical and photophysical characterization confirm that the initial spatial organization strongly determines the chemical composition and electronic structure of the materials, which, thanks to the preservation of functional groups in their surface, display excellent processability in liquid media.

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