Imaging and Radiation Research最新文献_第3页

Anti-CCP is not a marker of severity in established rheumatoid arthritis: An MRI study 抗ccp不是类风湿关节炎严重程度的标志:一项MRI研究

Imaging and Radiation Research Pub Date : 2007-04-22 DOI: 10.24294/irr.v5i2.1754

Lílian Santuza Santos Porto, W. C. Tavares Júnior, Dário Alves da Silva Costa, C. Lanna, A. Kakehasi

{"title":"Anti-CCP is not a marker of severity in established rheumatoid arthritis: An MRI study","authors":"Lílian Santuza Santos Porto, W. C. Tavares Júnior, Dário Alves da Silva Costa, C. Lanna, A. Kakehasi","doi":"10.24294/irr.v5i2.1754","DOIUrl":"https://doi.org/10.24294/irr.v5i2.1754","url":null,"abstract":"Introduction: the presence of anti-CCP is an important prognostic tool for rheumatoid arthritis (RA), but its relationship with the activity of the disease and functional capacity is still being investigated. Objectives: to study the relationship between anti-CCP and the indices of disease activity, functional capacity and structural damage, by means of conventional radiography (CR) and magnetic resonance imaging (MRI), in stabilized RA. Methods: cross-sectional study of RA patients with one to 10 years of disease. The participants were subjected to clinical evaluation with anti-CCP screening. Disease activity was assessed by means of the Clinical Disease Activity Index (CDAI) and functional capacity by means of the Health Assessment Questionnaire (HAQ). CR was analyzed by the Sharp van der Heijde index (SmvH) and MRI by the Rheumatoid Arthritis Magnetic Resonance Image Scoring System (RAMRIS). Results: 56 patients were evaluated, with median (IIq) of 55 (47.5–60.0) years, 50 (89.3%) were female among whom 37 (66.1%) were positive for anti-CCP. The median (IIq) of CDAI, HAQ, SmvH and RAMRIS were 14.75 (5.42–24.97), 1.06 (0.28–1.75), 2 (0–8) and 15 (7–35), respectively. There was no association between anti-CCP and CDAI, HAQ, SmvH and RAMRIS. Conclusion: our results did not establish the association of anti-CCP with the severity of the disease. So far, we cannot corroborate the anti-CCP as a prognostic tool in RA established.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114890669","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}

引用次数: 0

Colorectal cancer staging with magnetic resonance imaging 结直肠癌的核磁共振分期

Imaging and Radiation Research Pub Date : 2006-12-22 DOI: 10.24294/irr.v5i2.1753

Felipe Aluja Jaramillo, Daniel Upegui Jiménez

引用次数: 0

Altered entropy in the precuneus and posterior cingulate cortex in Alzheimer’s disease: A resting functional magnetic resonance imaging study 阿尔茨海默病楔前叶和后扣带皮层熵的改变:静息功能磁共振成像研究

Imaging and Radiation Research Pub Date : 2005-07-22 DOI: 10.24294/irr.v5i2.1750

Aura C. Puche, J. Ochoa-Gómez, Yésika Alexandra Agudelo-Londoño, Jan Karlo Rodas-Marín, C. A. Tóbon-Quintero

{"title":"Altered entropy in the precuneus and posterior cingulate cortex in Alzheimer’s disease: A resting functional magnetic resonance imaging study","authors":"Aura C. Puche, J. Ochoa-Gómez, Yésika Alexandra Agudelo-Londoño, Jan Karlo Rodas-Marín, C. A. Tóbon-Quintero","doi":"10.24294/irr.v5i2.1750","DOIUrl":"https://doi.org/10.24294/irr.v5i2.1750","url":null,"abstract":"The human brain has been described as a complex system. Its study by means of neurophysiological signals has revealed the presence of linear and nonlinear interactions. In this context, entropy metrics have been used to uncover brain behavior in the presence and absence of neurological disturbances. Entropy mapping is of great interest for the study of progressive neurodegenerative diseases such as Alzheimer’s disease. The aim of this study was to characterize the dynamics of brain oscillations in such disease by means of entropy and amplitude of low frequency oscillations from Bold signals of the default network and the executive control network in Alzheimer’s patients and healthy individuals, using a database extracted from the Open Access Imaging Studies series. The results revealed higher discriminative power of entropy by permutations compared to low-frequency fluctuation amplitude and fractional amplitude of low-frequency fluctuations. Increased entropy by permutations was obtained in regions of the default network and the executive control network in patients. The posterior cingulate cortex and the precuneus showed differential characteristics when assessing entropy by permutations in both groups. There were no findings when correlating metrics with clinical scales. The results demonstrated that entropy by permutations allows characterizing brain function in Alzheimer’s patients, and also reveals information about nonlinear interactions complementary to the characteristics obtained by calculating the amplitude of low frequency oscillations.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"8 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132893765","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}

引用次数: 0

The prevalence and characterization of implant-related findings in panoramic radiographs 全景x线片中植入物相关表现的普遍性和特征

Imaging and Radiation Research Pub Date : 2004-11-21 DOI: 10.24294/irr.v4i1.1732

S. Sánchez, A. Rodríguez Ciódaro, David Martínez Laverde, Alejandro Curan Cantoral

{"title":"The prevalence and characterization of implant-related findings in panoramic radiographs","authors":"S. Sánchez, A. Rodríguez Ciódaro, David Martínez Laverde, Alejandro Curan Cantoral","doi":"10.24294/irr.v4i1.1732","DOIUrl":"https://doi.org/10.24294/irr.v4i1.1732","url":null,"abstract":"Introduction: In Colombia, the last oral health study showed that about 70% of the population has partial edentulism while 5.2% will have lost all their teeth between the age of 65 and 79. Rehabilitation with implants is an increasingly used option, which requires clinical and radiographic follow-up. Panoramic radiography is a low-cost option, in which it is possible to observe areas of bone loss, mesiodistal angulation of the implant, relationship with anatomical structures and lesions suggestive of peri-implantitis. Reports and analysis of relevant data on radiographic findings associated with dental implants are required to determine the risk factors for their success in patients who use them. Objective: To determine the prevalence and characterize the findings associated with osseointegration implants in panoramic radiographs. Methods: A descriptive cross-sectional observational study was carried out with 10,000 digital panoramic radiographs selected by convenience from radiological centers in the city of Bogota, Colombia, of which 543 corresponded to the sample analyzed for the presence of implants. The following were evaluated for each implant: location, position, angulation and distances to adjacent structures, using the Clínicalview® program (Orthopantomograph OP200D, Instrumentarium, USA). Results: The frequency of radiographs with implants was 5.43% with a total of 1,791 implants, with an average of 3.2 per radiograph. They were found in greater proportion in the upper jaw with a supracrestal location and an angulation of 10.3 degrees. 32% had implant/tooth or implant/implant distances that were less than optimal. 40.9% were restored and 1.2% showed lesions compatible with periimplantitis. Conclusions: A high percentage of the implants reviewed have a risk factor that affects their long-term viability, either due to angulation, supracrestal or crestal position, proximity to teeth or other implants, or because they are not restorable.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128450585","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}

引用次数: 0

Pulmonary dynamics of anatomical structures of interest in 4DCT imaging 肺动力学的解剖结构感兴趣的4DCT成像

Imaging and Radiation Research Pub Date : 2004-02-20 DOI: 10.24294/irr.v3i1.1723

Sarahí Hernández-Juárez, A. Mejía-Rodríguez, E. Arce-Santana

{"title":"Pulmonary dynamics of anatomical structures of interest in 4DCT imaging","authors":"Sarahí Hernández-Juárez, A. Mejía-Rodríguez, E. Arce-Santana","doi":"10.24294/irr.v3i1.1723","DOIUrl":"https://doi.org/10.24294/irr.v3i1.1723","url":null,"abstract":"The present work shows an application of the Chan-Vese algorithm for the semi-automatic segmentation of anatomical structures of interest (lungs and lung tumor) in 4DCT images of the thorax, as well as their three-dimensional reconstruction. The segmentation and reconstruction were performed on 10 CT images, which make up an inspiration-expiration cycle. The maximum displacement was calculated for the case of the lung tumor using the reconstructions of the onset of inspiration, the onset of expiration, and the voxel information. The proposed method achieves appropriate segmentation of the studied structures regardless of their size and shape. The three-dimensional reconstruction allows us to visualize the dynamics of the structures of interest throughout the respiratory cycle. In the future, it is expected to have more evidence of the good performance of the proposed method and to have the feedback of the clinical expert, since the knowledge of the characteristics of anatomical structures, such as their dimension and spatial position, helps in the planning of Radiotherapy (RT) treatments, optimizing the radiation dose to cancer cells and minimizing it in healthy organs. Therefore, the information found in this work may be of interest for the planning of RT treatments.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125566713","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}

引用次数: 0

3D ultrasound in cardiology 心脏病学中的三维超声

Imaging and Radiation Research Pub Date : 2004-01-22 DOI: 10.24294/irr.v5i1.1748

A. Bravo, M. Vera, Delia Madriz, Julio Contreras-Velásquez, José Chacón, Sandra Wilches-Durán, Modesto Graterol-Rivas, Daniela Riaño-Wilches, Joselyn Rojas, Valmore Bermúdez

{"title":"3D ultrasound in cardiology","authors":"A. Bravo, M. Vera, Delia Madriz, Julio Contreras-Velásquez, José Chacón, Sandra Wilches-Durán, Modesto Graterol-Rivas, Daniela Riaño-Wilches, Joselyn Rojas, Valmore Bermúdez","doi":"10.24294/irr.v5i1.1748","DOIUrl":"https://doi.org/10.24294/irr.v5i1.1748","url":null,"abstract":"Cardiovascular imaging analysis is a useful tool for the diagnosis, treatment and monitoring of cardiovascular diseases. Imaging techniques allow non-invasive quantitative assessment of cardiac function, providing morphological, functional and dynamic information. Recent technological advances in ultrasound have made it possible to improve the quality of patient treatment, thanks to the use of modern image processing and analysis techniques. However, the acquisition of these dynamic three-dimensional (3D) images leads to the production of large volumes of data to process, from which cardiac structures must be extracted and analyzed during the cardiac cycle. Extraction, three-dimensional visualization, and qualiﬁcation tools are currently used within the clinical routine, but unfortunately require significant interaction with the physician. These elements justify the development of new efficient and robust algorithms for structure extraction and cardiac motion estimation from three-dimensional images. As a result, making available to clinicians new means to accurately assess cardiac anatomy and function from three-dimensional images represents a definite advance in the investigation of a complete description of the heart from a single examination. The aim of this article is to show what advances have been made in 3D cardiac imaging by ultrasound and additionally to observe which areas have been studied under this imaging modality.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129304441","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}

引用次数: 0

Use of ultrasound in difficult to cannulate arteriovenous fistulas in hemodialysis 超声在血液透析中难以插管动静脉瘘中的应用

Imaging and Radiation Research Pub Date : 2003-09-22 DOI: 10.24294/irr.v5i1.1746

Ignacio Villanueva Bendek, Mauricio Ruiz, Lia Vega

引用次数: 0

Image quality control and dosimetry for digital mammography, using the Normi Mam Digital phantom 数字乳房x线摄影的图像质量控制和剂量测定，使用Normi Mam数字幻影

Imaging and Radiation Research Pub Date : 2003-07-21 DOI: 10.24294/irr.v4i1.1731

Angélica Calderón-Mata, L. Arce-Corrales, Ricardo Mejías-Gamboa

引用次数: 0

Bacteria on surfaces contacted during intraoral radiographic examinations 口腔内放射检查时接触表面的细菌

Imaging and Radiation Research Pub Date : 2002-05-21 DOI: 10.24294/irr.v4i1.1730

G. Lee, Victor Calderón-Ubaquí, Sonia-Julia Sacsaquispe-Contreras

{"title":"Bacteria on surfaces contacted during intraoral radiographic examinations","authors":"G. Lee, Victor Calderón-Ubaquí, Sonia-Julia Sacsaquispe-Contreras","doi":"10.24294/irr.v4i1.1730","DOIUrl":"https://doi.org/10.24294/irr.v4i1.1730","url":null,"abstract":"Objective: To determine the presence of bacteria by means of microbiological analysis on the surfaces contacted by the operator during the taking and processing of intraoral radiographs at different times of the day in the Oral Radiology Service of the UPCH. Materials and methods: Nine surfaces of the oral radiology service were sampled. The samples were taken at two times by the same investigator; at the beginning and the end of the activities in the service, the surfaces were swabbed with Trypticase Soy Broth (TSB). The samples were inoculated and incubated in three culture media (Plate Count Agar, Lamb’s Blood Agar and Cetrimide Agar). Then the respective Colony Forming Unit (CFU) count was performed and Gram staining was also performed. Results: A high concentration of bacteria (4180 CFU/mL) and fungi was found in the oral radiology service. Gram-positive cocci were the most frequently found microorganisms and gram-negative bacilli were less frequently found. Conclusions: There is a high contamination of bacteria in the oral radiology service. When the activities are completed, the number of bacteria decreases, but the variety of bacteria increases.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134125501","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}

引用次数: 0

The utility of echofast in patients admitted to the emergency department with thoracic trauma 超声在急诊科胸外伤患者中的应用

Imaging and Radiation Research Pub Date : 2002-01-22 DOI: 10.24294/irr.v5i1.1743

Luis Adrián Muñoz Andrade, Rosana Fabregas Almanza, Jeyson Eddy Roth Chuizaca, Andrea Geovanna Sanipatín Criollo

{"title":"The utility of echofast in patients admitted to the emergency department with thoracic trauma","authors":"Luis Adrián Muñoz Andrade, Rosana Fabregas Almanza, Jeyson Eddy Roth Chuizaca, Andrea Geovanna Sanipatín Criollo","doi":"10.24294/irr.v5i1.1743","DOIUrl":"https://doi.org/10.24294/irr.v5i1.1743","url":null,"abstract":"Focused Assessment with Sonography for Trauma (FAST) has been widely used and studied in blunt and penetrating trauma for the past 3 decades. Prior to FAST, invasive procedures such as diagnostic peritoneal lavage and exploratory laparotomy were commonly used to diagnose intra-abdominal injuries. Today, the FAST examination has evolved into a more comprehensive study of the abdomen, heart, thorax, inferior vena cava, among others, with many variations in technique, protocols and interpretation. Trauma management strategies such as laparotomy, endoscopy, computed tomography angiography, angiographic intervention, serial imaging and clinical observation have also changed over the years. This technique, at times, has managed to replace computed tomography and peritoneal lavage diagnosis, without producing delays in the surgical procedure. As such, the relationship between the patient’s clinical information and the results of the exam should be guided to guide therapeutic approaches in difficult to access settings such as intensive care units in war zones, rural or remote locations where other imaging methods are not available. This review will discuss the evolution of the FAST exam to its current status and evaluate its evolving role in the acute management of the trauma patient.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116154794","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}

引用次数: 0