Radiology Research and Practice最新文献

{"title":"A Review of Doses for Dental Imaging in 2010-2020 and Development of a Web Dose Calculator.","authors":"Hawon Lee,&nbsp;Andreu Badal","doi":"10.1155/2021/6924314","DOIUrl":"10.1155/2021/6924314","url":null,"abstract":"Dental imaging is one of the most common types of diagnostic radiological procedures in modern medicine. We introduce a comprehensive table of organ doses received by patients in dental imaging procedures extracted from literature and a new web application to visualize the summarized dose information. We analyzed articles, published after 2010, from PubMed on organ and effective doses delivered by dental imaging procedures, including intraoral radiography, panoramic radiography, and cone-beam computed tomography (CBCT), and summarized doses by dosimetry method, machine model, patient age, and technical parameters. Mean effective doses delivered by intraoral, 1.32 (0.60–2.56) μSv, and panoramic, 17.93 (3.47–75.00) μSv, procedures were found to be about1% and 15% of that delivered by CBCT, 121.09 (17.10–392.20) μSv, respectively. In CBCT imaging, child phantoms received about 29% more effective dose than the adult phantoms received. The effective dose of a large field of view (FOV) (>150 cm2) was about 1.6 times greater than that of a small FOV (<50 cm2). The maximum CBCT effective dose with a large FOV for children, 392.2 μSv, was about 13% of theeffective dose that a person receives on average every year from natural radiation, 3110 μSv. Monte Carlo simulations of representative cases of the three dental imaging procedures were then conducted to estimate and visualize the dose distribution within the head. The user-friendly interactive web application (available at http://dentaldose.org) receives user input, such as the number of intraoral radiographs taken, and displays total organ and effective doses, dose distribution maps, and a comparison with other medical and natural sources of radiation. The web dose calculator provides a practical resource for patients interested in understanding the radiation doses delivered by dental imaging procedures.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8767401/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39852257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acute Neurological Brain Lesions in the Structure of the Clinical Picture of Severe Respiratory Syndrome-2 (SARS-CoV-2)","authors":"G. N. Dorovskikh, S. S. Sedelnikov, S. A. Kozhedub, D. A. Sulim, Ya. A. Biler, A. A. Podenkova","doi":"10.52560/2713-0118-2022-1-13-29","DOIUrl":"https://doi.org/10.52560/2713-0118-2022-1-13-29","url":null,"abstract":"The coronavirus of severe acute respiratory syndrome-2 (SARS-CoV-2) and the coronavirus infection caused by it, along with damage to the respiratory system, can lead to disorders of the central and peripheral nervous system. The article presents literature data and own observations of neurological disorders in patients with coronavirus disease in the superacute period. Pronounced neurological disorders are mainly observed in severe coronavirus disease and include acute ischemic stroke, subcortical microand macro— bleeding, acute necrotizing encephalopathy, Guillain-Barre syndrome. Factors potentially complicating the course of coronavirus disease and contributing to the development of neurological complications are hypertension, diabetes mellitus, chronic diseases of the heart and respiratory system. Based on existing publications and our own observations, we have systematized information about the relationship between coronavirus disease and neurological disorders, about possible factors contributing to the occurrence of stroke. The possibilities of using chest MSCT as the only method of radiation diagnostics for the early detection of viral pneumonia in patients receiving emergency and emergency care at the regional vascular center of BUZOO «GC BSMP No. 1» are considered. The use of this method, in the ultra-acute period of acute ischemic stroke, during the first 40 minutes from the moment of admission, can significantly reduce the time of diagnosis and mortality in patients with acute ischemic stroke and viral pneumonia.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90739523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Venous Angioma of the Deep Brain Structures which Caused Aqueductal Stenosis (Сlinical Case and the Review of the Literature)","authors":"K. Solozhentseva, K. Shevchenko, N. Zakharova, R. Afandiev, I. Pronin","doi":"10.52560/2713-0118-2022-1-101-108","DOIUrl":"https://doi.org/10.52560/2713-0118-2022-1-101-108","url":null,"abstract":"Venous angioma is a common developmental abnormality of the cerebral venous vessels. Usually, this pathology is not accompanied by any symptoms and is detected accidentally during MRI studies conducted for other reasons. In our article, we present a rare clinical case when venous angioma caused symptoms due to its location, which led to the development of the aqueductal stenosis.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84956993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence and Risk Factors of Work-Related Lower Back Pain among Radiographers in the State of Kuwait.","authors":"Hesham N Alrowayeh,&nbsp;Musaed Z Alnaser,&nbsp;Talal A Alshatti,&nbsp;Raed S Saeed","doi":"10.1155/2021/5365260","DOIUrl":"https://doi.org/10.1155/2021/5365260","url":null,"abstract":"<p><strong>Background: </strong>Work-related lower back pain (WrLBP) is a global health issue and a rising concern in the State of Kuwait. The prevalence and the risk factors of WrLBP among radiographers are not well documented.</p><p><strong>Objective: </strong>The purpose of the study was to determine the one-year prevalence, characteristics, impact, and physical risk factors of WrLBP among radiographers in the State of Kuwait.</p><p><strong>Methods: </strong>A self-administered questionnaire was distributed to 200 radiographers. The questionnaire collected data on demographics, physical risk factors, and the occurrence of WrLBP in the previous 12 months. Descriptive statistics, frequency calculations, and chi-square analyses were performed.</p><p><strong>Results: </strong>One hundred forty-six radiographers completed and returned the questionnaires with a response rate of 73% (146/200). The one-year prevalence of WrLBP was 16%. The prevalence of WrLBP was not significantly associated with the participants' demographics. Although WrLBP was significantly associated with work demands, the overall impact of WrLBP on work duties was minimal.</p><p><strong>Conclusions: </strong>The occurrence of WrLBP among radiographers in Kuwait was low, particularly when compared to healthcare providers involved in more patient handling and direct contact. However, various physical risk factors were identified. Further research is needed to investigate the effect of a treatment and prevention program on the prevalence of WrLBP.</p>","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8664547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39719709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnosis of Spinal Metameric Arteriovenous Malformation Syndrome (Case Report)","authors":"E. V. Rasulova, I. Pronin, R. Afandiev, N. Zakharova","doi":"10.52560/2713-0118-2022-1-91-100","DOIUrl":"https://doi.org/10.52560/2713-0118-2022-1-91-100","url":null,"abstract":"This paper presents a rare case of spinal arteriovenous metameric syndrome (SAVMS) with lesions localized in the lower thoracic spine with the presence of two closely spaced arteriovenous malformations intramedullary and extradural (intravertebral) localization. The possibilities of minimally invasive contrast dynamic MR-angiography (TRICKS) in the diagnosis of the main components of vascular malformations and in determining the level of their arterial blood supply have been demonstrated.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87507022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experience of Application of Magnetic Resonance Myelography Methods in Patients with Neurological and Neurosurgical Pathology","authors":"O. Bogomyakova, L. M. Vasilkiv, Y. Stankevich, A. Savelov, A. Tulupov","doi":"10.52560/2713-0118-2022-1-45-62","DOIUrl":"https://doi.org/10.52560/2713-0118-2022-1-45-62","url":null,"abstract":"Purpose — to study the possibilities of clinical application of MR-myelography techniques in static and dynamic modes in patients with various neurological and neurosurgical pathologies accompanied by CSF dynamics disorders. On the Philips 1.5 and 3.0 T MRI scanners, an extended protocol for examination of patients with cerebrospinal fluid disorders was presented. The protocol includes, in addition to routine sequences (T1-, T2-WI, FLAIR), thin-slice MP-myelography in a static mode (CSF-DRIVE, 3DMYUR) with soft tissues signal suppression. Also, a cinema-technique of MR myelography (CSF-PCA) in the optimal projection and a phase-contrast method with a quantitative assessment of the cerebrospinal fluid flow at the pathology level and at adjacent levels were performed. The assessment of the diagnostic significance of the proposed research protocol was carried out. The extended study protocol was applied in patients with idiopathic normotensive hydrocephalus, obstructive hydrocephalus, Chiari malformation type I, in patients with syringomyelia at the level of the cervical spinal cord and showed high efficiency in assessing of cerebrospinal fluid dynamics in patients with a neurological and neurosurgical profile. The use of extended approach allows to more fully evaluate the state of the cerebrospinal fluid system, the patency of the cerebrospinal fluid (the presence of additional septa / membranes, partial / complete stenosis and narrowing), as well as preand postoperative morpho-functional changes.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88530958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusion-tensor and Diffusion-kurtosis Magnetic Resonance Imaging in the Assessment of Diffuse Axonal Injury (Literature Review)","authors":"R. Afandiev, N. Zakharova, E. Pogosbekyan, A. Potapov, I. Pronin","doi":"10.52560/2713-0118-2022-1-77-90","DOIUrl":"https://doi.org/10.52560/2713-0118-2022-1-77-90","url":null,"abstract":"Traumatic brain injury (TBI) is the main cause of disability and mortality among young people, and neurological dysfunctions can persist many years after injury. One of the main type of TBI is diffuse axonal injury (DAI). The prevalence of diffuse axonal injury is often underestimated in computed tomography (CT) and routine magnetic resonance imaging (MRI). In such cases, diffusion-tensor MRI (DT MRI) and diffusion-kurtosis MRI (DK MRI) provide additional information about the integrity of the brain tissue, which cannot be obtained using standard MRI. In this review, we examined the contribution of DT MRI and DK MRI methods to understanding the pathophysiology and prognosis of DAI to help experts interested in planning new studies and participating in the care of patients with TBI.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90780473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Phase Estimation Methods for Quantitative Susceptibility Mapping Using a Rotating-Tube Phantom.","authors":"Kathryn E Keenan, Ben P Berman, Slávka Rýger, Stephen E Russek, Wen-Tung Wang, John A Butman, Dzung L Pham, Joseph Dagher","doi":"10.1155/2021/1898461","DOIUrl":"10.1155/2021/1898461","url":null,"abstract":"<p><p>Quantitative Susceptibility Mapping (QSM) is an MRI tool with the potential to reveal pathological changes from magnetic susceptibility measurements. Before phase data can be used to recover susceptibility (Δ<i>χ</i>), the QSM process begins with two steps: data acquisition and phase estimation. We assess the performance of these steps, when applied without user intervention, on several variations of a phantom imaging task. We used a rotating-tube phantom with five tubes ranging from Δ<i>χ</i>=0.05 ppm to Δ<i>χ</i>=0.336 ppm. MRI data was acquired at nine angles of rotation for four different pulse sequences. The images were processed by 10 phase estimation algorithms including Laplacian, region-growing, branch-cut, temporal unwrapping, and maximum-likelihood methods, resulting in approximately 90 different combinations of data acquisition and phase estimation methods. We analyzed errors between measured and expected phases using the probability mass function and Cumulative Distribution Function. Repeatable acquisition and estimation methods were identified based on the probability of relative phase errors. For single-echo GRE and segmented EPI sequences, a region-growing method was most reliable with Pr (relative error <0.1) = 0.95 and 0.90, respectively. For multiecho sequences, a maximum-likelihood method was most reliable with Pr (relative error <0.1) = 0.97. The most repeatable multiecho methods outperformed the most repeatable single-echo methods. We found a wide range of repeatability and reproducibility for off-the-shelf MRI acquisition and phase estimation approaches, and this variability may prevent the techniques from being widely integrated in clinical workflows. The error was dominated in many cases by spatially discontinuous phase unwrapping errors. Any postprocessing applied on erroneous phase estimates, such as QSM's background field removal and dipole inversion, would suffer from error propagation. Our paradigm identifies methods that yield consistent and accurate phase estimates that would ultimately yield consistent and accurate Δ<i>χ</i> estimates.</p>","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8635951/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39695823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Appendiceal Intraluminal Gas: A CT Marker for Gangrenous Appendicitis.","authors":"Chantelle Ip,&nbsp;Edward H Wang,&nbsp;Michael Croft,&nbsp;Wanyin Lim","doi":"10.1155/2021/7191348","DOIUrl":"https://doi.org/10.1155/2021/7191348","url":null,"abstract":"<p><strong>Introduction: </strong>This manuscript aims to investigate the amount of intraluminal gas in acute, nonperforated appendicitis identified on computed tomography (CT) in diagnosing gangrenous appendicitis.</p><p><strong>Methods: </strong>This is a retrospective observational, case-control study with consecutive data collected at a tertiary institution over a two-year period, of patients with CT-diagnosed acute appendicitis who subsequently went on for surgery within 48 hours. Patients who were less than 16 years old, who had an interval between CT and surgery of more than 48 hours, or with CT evidence of appendiceal perforation were excluded. Images were independently assessed by 3 radiologists for intraluminal gas, and the results were then correlated with reference standards obtained from surgical and histopathology reports for the diagnosis of nongangrenous versus gangrenous appendicitis. The sensitivity, specificity, and predictive values of CT intraluminal gas in gangrenous appendicitis were calculated.</p><p><strong>Results: </strong>Our study identified 93 patients with nonperforated acute appendicitis who underwent surgery within the stated timeframe. Intraluminal gas in the appendix was identified in 26 patients (28%), of which 54% had macroscopic and/or microscopic evidence of gangrenous appendicitis. This is in contrast to the subgroup of patients who did not have intraluminal gas (72%), of which only 33% had gangrenous appendicitis. The specificity of intraluminal gas for gangrenous appendicitis is 79%, with a negative predictive value of 86% and likelihood ratio of 1.85.</p><p><strong>Conclusion: </strong>In cases of established acute appendicitis, the presence of intraluminal gas is a moderately specific sign for gangrenous complication. This is worth reporting as it can help prognosticate and triage patients accordingly, for a timelier surgical management and a better outcome.</p>","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8629666/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39683514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Role of high-resolution Magnetic Resonance Imaging at Different Stages of Subchondral Insufficiency Fracture in the Knee","authors":"A. Ivankov, P. Seliverstov","doi":"10.52560/60/2713-0118-2022-2-24-32","DOIUrl":"https://doi.org/10.52560/60/2713-0118-2022-2-24-32","url":null,"abstract":"The  history of subchondral insufficiency fracture of knee is closely related to a pre-existing diagnosis of  spontaneous osteonecrosis (SONK). Previously,  it  was believed that  subchondral linear or lunate pathological changes on magnetic resonance imaging in elderly patients with osteoporosis are the result of spontaneous osteonecrosis that has occurred, but it was later found that a small proportion of patients with osteonecrosis of the femoral head initially  have a failure fracture, then complicated by secondary osteonecrosis. The main methods for diagnosing subchondral insufficiency fracture are radiography and magnetic resonance imaging. Magnetic  resonance imaging has demonstrated high information content in subchondral insufficiency fracture of knee.","PeriodicalId":51864,"journal":{"name":"Radiology Research and Practice","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79633986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}