scholarly journals VIRTOPSY IN THE CZECH REPUBLIC

2020 ◽  
Vol 6 (2) ◽  
pp. 44-48
Author(s):  
J. Frishons ◽  
V. Novotny ◽  
P. Rejtar ◽  
P. Hejna ◽  
M. A. Kislov ◽  
...  
Keyword(s):  
Czech Republic ◽  
Soft Tissues ◽  
Road Traffic ◽  
Image Data ◽  
Ct Scanning ◽  
Resonance Imaging ◽  
The Czech Republic ◽  
Aviation Accidents ◽  
Conventional Autopsy ◽  
Magnetic Resonance Imaging Mri

Postmortem computer tomography (CT) came into practice of forensic medicine in the 1990s and has later been complemented with magnetic resonance imaging (MRI). A pioneer virtual autopsy was conducted in Germany in 1983. In the Czech Republic, this examination was first performed in 1993.A typical examination requires about 30 min, with the most resource-demanding stage being the image data rendering. CT was shown to better capture skeletal structures, while MRI contrasting is superior in terms of visualising soft tissues. In the Czech Republic, CT-based virtopsy is legislated mandatory to document deaths inflicted by gunshots, road traffic and aviation accidents, high falls, occupational and explosive-related injuries, thermal and mechanical traumas, strangulation, drowning as well as to examine unidentified or decomposing bodies, deceased children and adolescents aged under 18.CT scanning prior to conventional autopsy provides a forensic expert with guidance to reveal pathologies non-invasively in particular regions that are difficult to dissect or access. The advantage of virtopsy is the objective acquisition of data that can be re-examined, reinterpreted or juxtaposed with the results of conventional autopsy and easily recovered for possible further expertise. 

scholarly journals Deformable Atlases for the Segmentation of Internal Brain Nuclei in Magnetic Resonance Imaging

2007 ◽  
Vol 2 (1) ◽  
pp. 26 ◽  
Author(s):  
Marius George Linguraru ◽  
Miguel Ángel González Ballester ◽  
Nicholas Ayache
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Grey Matter ◽  
Soft Tissues ◽  
Image Data ◽  
Brain Structures ◽  
Anatomical Landmarks ◽  
Resonance Imaging ◽  
Deep Grey Matter ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) is commonly employed for the depiction of soft tissues, most notably the human brain. Computer-aided image analysis techniques lead to image enhancement and automatic detection of anatomical structures. However, the information contained in images does not often offer enough contrast to robustly obtain a good detection of all internal brain structures, not least the deep grey matter nuclei. We propose a method that incorporates prior anatomical knowledge in the shape of digital atlases that deform to fit the image data to be analysed. Our technique is based on a combination of rigid, affine and non-rigid registration, segmentation of key anatomical landmarks and propagation of the information of the atlas to detect deep grey matter nuclei. The Montreal Neurological Institute (MNI) and Zubal atlases are employed. Results show that detecting important structures such as the ventricles and brain outlines greatly improves the results. Our method is fully automatic.

Magnetic Resonance Imaging in the Diagnosis of Disruption of the Posterior Tibial Tendon

Foot & Ankle ◽  
1987 ◽  
Vol 8 (3) ◽  
pp. 144-147 ◽  
Author(s):  
Ian J. Alexander ◽  
Kenneth A. Johnson ◽  
Thomas H. Berquist
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissues ◽  
Diagnostic Technique ◽  
Clinical Findings ◽  
The Body ◽  
Posterior Tibial Tendon ◽  
Resonance Imaging ◽  
Posterior Tibial ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI), a useful technique of studying soft tissues of the body, can be very effective in assessing the integrity of tendons. Usually a patient with a complete tear of the posterior tibial tendon has characteristic physical findings. In the patient presented, MRI demonstrated a complete disruption of the posterior tibial tendon, despite the absence of the commonly associated clinical findings. In view of the difficulties encountered with attempted tenography of the completely torn posterior tibial tendon, MRI provides a sensitive alternative diagnostic technique.

Human Birth Imaging Using MRI: Prospective cohort study (Preprint)

2021 ◽  
Author(s):  
Olivier Ami ◽  
Jean Christophe Maran ◽  
Dominique Musset ◽  
Claude Dubray ◽  
Gérard Mage ◽  
...  
Keyword(s):  
Soft Tissues ◽  
Neurological Impairment ◽  
Invasive Technique ◽  
Resonance Imaging ◽  
Effective Utilization ◽  
Medical Risk ◽  
Non Invasive ◽  
Bony Pelvis ◽  
Magnetic Resonance Imaging Mri ◽  
Human Birth

UNSTRUCTURED Childbirth is a physiologic process with significant medical risk, as neurological impairment due to the birthing process can occur at any time. Improvements in risk assessment and anticipatory interventions are constantly needed; however, the birthing process is difficult to assess using simple imaging technology since the maternal bony pelvis and fetal skeleton interfere with visualizing the soft tissues. Magnetic resonance imaging (MRI) is a non-invasive technique with no ionizing radiation that can monitor the biomechanics of the birthing process. Effective utilization of this modality, however, requires teamwork and implementation of the appropriate safeguards to achieve appropriate safety levels. This article describes a clinically effective and safe method to perform real-time MRI during the birthing process. We report the experience of our team as part of the IMAGINAITRE research protocol (France), which aimed better understand of the biomechanics of childbirth. 

Endometriosis of the sciatic nerve with cyclic sciatica

2014 ◽  
Vol 21 (3) ◽  
pp. 99-102 ◽  
Author(s):  
Ozdil Baskan ◽  
Ferda Ozdemir
Keyword(s):  
Magnetic Resonance Imaging ◽  
Sciatic Nerve ◽  
Soft Tissues ◽  
Uterine Cavity ◽  
Common Disease ◽  
Resonance Imaging ◽  
Irreversible Damage ◽  
Rare Manifestation ◽  
Magnetic Resonance Imaging Mri ◽  
Gynecological Disorder

Endometriosis is an important gynecological disorder which is characterized by proliferation of the functional endometrial tissue outside the uterine cavity, affects most commonly the ovaries and less frequently the gastrointestinal tract, chest, urinary tract, and soft tissues. Endometriosis invading the sciatic nerve is a rare manifestation of a common disease. The cyclic rhythm of pain, associated with the magnetic resonance imaging (MRI) signal of the lesion should suggest a diagnosis of endometriosis. Early diagnosis and treatment are important to prevent irreversible damage to the sciatic nerve.

Magnetic resonance imaging and computerized tomography scanning of herpes simplex encephalitis

1987 ◽  
Vol 67 (4) ◽  
pp. 592-594 ◽  
Author(s):  
Eric W. Neils ◽  
Robert Lukin ◽  
Thomas A. Tomsick ◽  
John M. Tew
Keyword(s):  
Magnetic Resonance Imaging ◽  
Herpes Simplex ◽  
Magnetic Resonance ◽  
Computerized Tomography ◽  
Herpes Simplex Encephalitis ◽  
Ct Scanning ◽  
Magnetic Resonance Images ◽  
Resonance Imaging ◽  
Content Type ◽  
Magnetic Resonance Imaging Mri

✓ The authors present two cases of herpes simplex encephalitis (HSE) in which computerized tomography (CT) scanning and magnetic resonance imaging (MRI) were performed. They also review the literature on the use of these imaging modalities in cases of HSE. The striking changes noted in these cases on T2-weighted magnetic resonance images in comparison to the CT findings suggest that MRI will help speed recognition of nonhemorrhagic HSE abnormalities.

scholarly journals The Impact of the COVID-19 Movement Restrictions on the Road Traffic in the Czech Republic during the State of Emergency

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Milan Simunek ◽  
Zdenek Smutny ◽  
Michal Dolezel
Keyword(s):  
Czech Republic ◽  
Road Traffic ◽  
The State ◽  
Communication Strategy ◽  
Case Based Reasoning ◽  
State Of Emergency ◽  
The Czech Republic ◽  
The Road ◽  
Traffic Speed ◽  
On The Road

The COVID-19 pandemic crisis has impacted numerous areas of people’s work and free-time activities. This article aims to present the main impacts of the COVID-19 movement restrictions on the road traffic in the Czech Republic, measured during the first epidemic wave, i.e., from 12 March to 17 May 2020. The state of emergency was imposed by the Czech government as a de jure measure for coping with the perceived crisis, although the measure eventually resulted only in a quite liberal de facto form of stay-at-home instruction. Unique country-scale traffic data of the first six months of 2020 from 37,002 km of roads, constituting 66% of all roads in the Czech Republic, were collected and analyzed. For the prediction of the prepandemic traffic conditions and their comparison with the measured values in the period of the state of emergency, a long-term traffic speed prediction ensemble model consisting of case-based reasoning, linear regression, and fallback submodels was used. The authors found out that the COVID-19 movement restrictions had a significant impact on the country-wide traffic. Traffic density was reduced considerably in the first three weeks, and the weekly average traffic speed in all road types increased by up to 21%, expectedly due to less crowded roads. The exception was motorways, where a different trend in traffic was found. In sum, during the first three weeks of the state of emergency, people followed government regulations and restrictions and changed their travel behavior accordingly. However, following this period, the traffic gradually returned to the prepandemic state. This occurred three weeks before the state of emergency was terminated. From a behavioral perspective, this article briefly discusses the possible causes of such discrepancies between de jure and de facto pandemic measures, i.e., the governmental communication strategy related to loosening of movement restrictions, media reality, and certain culture-related traits.

scholarly journals Comparison of radiography and magnetic resonance imaging in the diagnosis of hand osteoarthritis

2019 ◽  
Vol 57 (1) ◽  
pp. 91-99 ◽  
Author(s):  
D. M. Kudinsky ◽  
A. V. Smirnov ◽  
L. I. Alekseeva
Keyword(s):  
Magnetic Resonance Imaging ◽  
Articular Cartilage ◽  
Magnetic Resonance ◽  
Bone Marrow Edema ◽  
Soft Tissues ◽  
Joint Space ◽  
Hand Osteoarthritis ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri

The article discusses the possibilities and search for the optimal concept of diagnosis of hand osteoarthritis (OA). The data of numerous studies with focus on the comparison of sensitivity and specificity of the main techniques in this type of pathology – standard radiography and magnetic resonance imaging (MRI) are presented. Determination of the earliest symptoms of OA allows to predict the development of the disease and begin its therapy. The joint space narrowing due to the loss of articular cartilage is the earliest radiological symptom of OA, which is observed in the advanced stage of the disease. MRI, unlike radiography, makes it possible to visualize the articular cartilage, fluid in the joint cavity, bone marrow edema and soft tissues, but it is more expensive and time-consuming method. At present the main difficulty lies in the absence of a standardized system for assessing the MRI hand OA manifestations, as well as insufficient number of investigations in this area.

scholarly journals MRI flow measurements with a flexible stenosis phantom

2019 ◽  
Vol 5 (1) ◽  
pp. 565-568
Author(s):  
Alina Ibbeken ◽  
Pragathi Gurumurthy ◽  
Fenja Zell ◽  
Christina Hagen ◽  
Martin A. Koch ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Soft Tissues ◽  
Upper Airway ◽  
Patient Specific ◽  
Resonance Imaging ◽  
Flow Conditions ◽  
Flow Measurements ◽  
Obstructive Sleep ◽  
Comparison And Analysis ◽  
Magnetic Resonance Imaging Mri

AbstractObstructive sleep apnea (OSA) is a common sleep disorder caused by the collapse of the upper airway during sleep due to a shift of soft tissues. To optimise the treatment, one needs a better understanding of the patient-specific causes of OSA. As a first step, a flexible tube with a stenosis was manufactured, representing a simple model of the pharynx geometry. The phantom has been used to carry out magnetic resonance imaging (MRI) flow sensitive measurements, to investigate the flow conditions that lead to the collapse. This contribution is concerned with the comparison and analysis of the flow and phantom deformation using varying boundary conditions, such as the Reynolds number and transmural pressure.

scholarly journals Upper Airway Changes following Functional Treatment with the Headgear Herbst or Headgear Twin Block Appliance Assessed on Lateral Cephalograms and Magnetic Resonance Imaging

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Min Gu ◽  
Fabio Savoldi ◽  
Urban Hägg ◽  
Colman P. J. McGrath ◽  
Ricky W. K. Wong ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissues ◽  
Upper Airway ◽  
Functional Treatment ◽  
Resonance Imaging ◽  
Twin Block ◽  
Lateral Cephalograms ◽  
Magnetic Resonance Imaging Mri ◽  
Airway Dimensions

Objective. The present study compared the changes in the upper airway dimensions and sleep-related breathing disorder (SRBD) condition between functional treatment with the headgear Herbst (HG-Herbst) and headgear Twin Block (HG-TB) appliance. Soft tissues were assessed on lateral cephalometric X-ray and magnetic resonance imaging (MRI). Materials and Methods. Consecutive patients who sought orthodontic treatment at the Faculty of Dentistry of The University of Hong Kong were screened. Adolescents (12-17 year sold for boys and 10-15 years old for girls), with class II molar relationship and overjet >5 mm, with no severe transverse maxillary deficiency, were recruited. Patients were assigned either to the HG-Herbst or to the HG-TB treatment by stratified block randomisation, with sex as the stratification factor. Lateral cephalograms, magnetic resonance imaging (MRI), and the Paediatric Sleep Questionnaire (PSQ) were obtained at baseline and after treatment. Results. 28 patients were enrolled, and 26 patients (13 in each group) completed the treatment. Following 1 year of functional appliance treatment, a significantly lower increase of the lower anterior facial height was observed in the HG-Herbst group compared to the HG-TB group (p = 0.024). However, no significant differences were observed in the upper airway structures or SRBD between the two groups. Conclusion. The changes in upper airway dimensions and SRBD condition were not significantly different between the HG-Herbst and the HG-TB appliance treatment. Additional studies with larger sample size are warranted.

Magnetic resonance imaging in gynecological practice

1997 ◽  
Vol 78 (6) ◽  
pp. 439-441
Author(s):  
A. T. Valiullina ◽  
L. M. Tukhvatullina ◽  
R. F. Bakhtiozin ◽  
I. R. Chuvashaev
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissues ◽  
Dynamic Control ◽  
Anatomical Structure ◽  
Resonance Imaging ◽  
Noninvasive Diagnostics ◽  
Tissue Contrast ◽  
Magnetic Resonance Imaging Mri ◽  
Natural Tissue

Magnetic resonance imaging (MRI) has become one of the leading methods of noninvasive diagnostics in the last 10 years. Interest in this type of examination is due to its great potential possibilities: absence of radiation exposure, high natural tissue contrast, obtaining sections of any orientation, possibility of multiple examination and dynamic control, determining not only the anatomical structure of soft tissues, but also their chemical composition.

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