Imaging and Radiation Research最新文献_第2页

Analysis of encephalic lesions on magnetic resonance imaging in patients with Transcranial Doppler high intensity transient signals 经颅多普勒高强度瞬态信号对颅内病变磁共振成像的影响分析

Imaging and Radiation Research Pub Date : 2021-08-13 DOI: 10.24294/irr.v5i1.1744

A. Surur, Lucas M. Pessini Ferreira, Jorge A. Galíndez, J. Martin

引用次数: 0

Strategy to implement RapidArc® using HD120™MLC for irradiation of whole pelvis and lower para-aortic lymph nodes in cervical carcinoma 使用HD120™MLC对宫颈癌患者的全骨盆和下主动脉旁淋巴结实施RapidArc的策略

Imaging and Radiation Research Pub Date : 2018-06-14 DOI: 10.24294/IRR.V0I0.535

Arun Chairmadurai 1, H. Goel, V. Ganesan, Vikraman Subramani 1, Sandeep Kumar Jain 1, Vikash Kumar 1

{"title":"Strategy to implement RapidArc® using HD120™MLC for irradiation of whole pelvis and lower para-aortic lymph nodes in cervical carcinoma","authors":"Arun Chairmadurai 1, H. Goel, V. Ganesan, Vikraman Subramani 1, Sandeep Kumar Jain 1, Vikash Kumar 1","doi":"10.24294/IRR.V0I0.535","DOIUrl":"https://doi.org/10.24294/IRR.V0I0.535","url":null,"abstract":"Purpose: To compare the utility of RapidArc® technique with mono or dual isocentre using high-definition 120 multileaf collimator (HD120™MLC) for irradiation of whole pelvis and lower para-aortic lymph node (PALN) in cervical carcinoma.Methods: Ten patients having more than 22-cm treatment target length were delivered 45 Gy in 25 fractions by RapidArc® technique using mono or dual isocenter. Dose distribution characteristics were monitored using various indices. Doses to critical organs were also compared for the sparing effects.Results: Conformity and dose-gradient indices for mono or dual isocenter plans were comparable. However, mono-isocentric plan decreased the heterogeneity index (0.07±0.01) as compared to dual-isocentric plan (0.08±0.01; p<0.05). Mean and maximal doses to various critical organs remained comparable. The mean dose to bowel bag was significantly reduced (p<0.05) in mono-isocentric plan (18.78±5.18 Gy) as compared to dual-isocentric plan (19.20±5.27 Gy). Mono-isocentric plan required 1.3 times higher exposure time than the dual-isocentric plans but reduced the overall treatment time by eliminating intra-fraction patient shift that is inevitable in dual isocenter plan.Discussion: Feasibility of mono-isocentric RapidArc® plan using HD120™MLC for irradiation of whole pelvis and PALN relied on ‘Maximum Leaf Span’, which restricted the ‘leading-leaf’ to surpass the ‘trailing-leaf’ beyond 15-cm. This difficulty was overcome by truncating the field size and fixing the jaws at dedicated positions in mono-isocentric plan.Conclusion: The strategy used in mono-isocentric plan enhanced the utility of RapidArc® using HD120™MLC and also minimized the intra-fraction set-up variations and overall treatment time.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114699451","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

A second thought on low lying pubic tubercle -can inguinal hernia occurrence be predicted? 对低位耻骨结节的再思考——腹股沟疝的发生能否预测?

Imaging and Radiation Research Pub Date : 2018-06-14 DOI: 10.24294/IRR.V0I0.826

E. Saldanha, R. J. D’Cunha, R. D’Souza, S. Fernandes, Shubha Rao

{"title":"A second thought on low lying pubic tubercle -can inguinal hernia occurrence be predicted?","authors":"E. Saldanha, R. J. D’Cunha, R. D’Souza, S. Fernandes, Shubha Rao","doi":"10.24294/IRR.V0I0.826","DOIUrl":"https://doi.org/10.24294/IRR.V0I0.826","url":null,"abstract":"Introduction: Among all hernias inguinal hernia is known to be the most common condition for which surgery is being performed and 75% of all hernia occur in groin.The low pubic tubercle has more tendencies for herniation due to unusual origin of internal oblique muscle leaving internal ring unprotected during abdominal muscle contraction. In view of this we conducted a study to evaluate the incidence of inguinal hernia in low lying pubic tubercle and its correlation with occurrence of inguinal hernia.Materials and methods: A Hospital based prospective study was be conducted on 100 patients, who came with inguinal hernia conducted from May 2015 to April 2018 at Father Muller Medical College Hospital and those who met the criteria. Plain Anteroposterior Radiographs of Pelvic region in 100 patients of inguinal hernia and to find out if low lying pubic tubercle has any correlation with occurrence of inguinal herniaResults: A total of 100 patients with inguinal hernia meeting the inclusion criteria was included in the study, plain X-ray of the pelvis was taken to measure SS (Distance between each anterior superior iliac spines) and ST (Spinotubercular) line and we found that 76 patients out of 100 (76.0%) patients with inguinal hernia had a low lying PT that is ST >7.5 cms. 78 patients had indirect inguinal hernia and 32 patients had direct inguinal hernia.In our study of groin hernias, the most common age group involved is the 41-50 years age group with 17 cases 42.5%. The mean age in our study was is 47.05 years Standard deviation of age is 12.15years. In our study of groin hernias, the most common gender involved in groin hernias was male with 38 cases 95% of the cases.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123059368","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

Diffusion-weighted MRI of the abdomen 腹部弥散加权MRI

Imaging and Radiation Research Pub Date : 2012-05-20 DOI: 10.24294/irr.v3i1.1728

K. Holzapfel, A. Schreyer

引用次数: 0

Anatomical assessment of the temporomandibular joint with magnetic resonance imaging 颞下颌关节的磁共振解剖评价

Imaging and Radiation Research Pub Date : 2010-09-22 DOI: 10.24294/irr.v5i2.1760

Sandro Alexander Lévano Loayza, Abell Temistocles Sovero Gaspar

{"title":"Anatomical assessment of the temporomandibular joint with magnetic resonance imaging","authors":"Sandro Alexander Lévano Loayza, Abell Temistocles Sovero Gaspar","doi":"10.24294/irr.v5i2.1760","DOIUrl":"https://doi.org/10.24294/irr.v5i2.1760","url":null,"abstract":"A systemic and synthetic review of the anatomy of the temporomandibular joint in magnetic resonance imaging was developed for its evaluation. The temporomandibular joint is an anatomical structure composed of bones, muscles, ligaments and an articular disc that allows important physiological movements, such as mandibular opening, closing, protrusion, retrusion and lateralization. Magnetic resonance imaging is an imaging technique that does not use ionizing radiation and is more specific for the evaluation and interpretation of soft tissues, due to its high resolution, so it has an important role in the diagnosis of various maxillofacial pathologies, which is why the dentist should have knowledge of the structures and functions of the temporomandibular joint through magnetic resonance imaging. The review demonstrates the importance of magnetic resonance imaging in the study of the anatomy of the temporomandibular joint, in addition to mentioning the advantages provided by this imaging technique such as its good detail of the soft tissues in its different sequences and the non-use of ionizing radiation to obtain its images.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114234337","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

Application of X-ray imaging technology in energy materials research x射线成像技术在能源材料研究中的应用

Imaging and Radiation Research Pub Date : 2009-07-21 DOI: 10.24294/irr.v4i1.1737

Y. Gong, Zhenjiang Yu, Jiajun Wang

引用次数: 0

From standard radiography to whole-body MRI: 30 years of progress in multiple myeloma imaging 从标准x线摄影到全身MRI:多发性骨髓瘤成像的30年进展

Imaging and Radiation Research Pub Date : 2009-03-22 DOI: 10.24294/irr.v5i2.1758

F. Lecouvet, B. Berg, J. Malghem, B. Maldague, A. Ferrant, Jean-Louis Michauxu

{"title":"From standard radiography to whole-body MRI: 30 years of progress in multiple myeloma imaging","authors":"F. Lecouvet, B. Berg, J. Malghem, B. Maldague, A. Ferrant, Jean-Louis Michauxu","doi":"10.24294/irr.v5i2.1758","DOIUrl":"https://doi.org/10.24294/irr.v5i2.1758","url":null,"abstract":"Multiple myeloma (MM) is a hematologic cancer characterized by clonal proliferation of plasma cells within the bone marrow. It is the most serious form of plasma cell dyscrasias, whose complications—hypercalcemia, renal failure, anemia, and lytic bone lesions—are severe and justify the therapeutic management. Imaging of bone lesions is a cardinal element in the diagnosis, staging, study of response to therapy, and prognostic evaluation of patients with MM. Historically, the skeletal radiographic workup (SRW), covering the entire axial skeleton, has been used to detect bone lesions. Over time, new imaging techniques that are more powerful than SRW have been evaluated. Low-dose and whole-body computed tomography (CT) supplants SRW for the detection of bone involvement, but is of limited value in assessing therapeutic response. Bone marrow MRI, initially studying the axial pelvic-spinal skeleton and more recently the whole body, is an attractive alternative. Beyond its non-irradiating character, its sensitivity for the detection of marrow damage, its capacity to evaluate the therapeutic response and its prognostic value has been demonstrated. This well-established technique has been incorporated into disease staging systems by many health systems and scientiﬁc authorities. Along with positron emission tomography (PET)-18 ﬂuorodeoxyglucose CT, it constitutes the current imaging of choice for MM. This article illustrates the progress of the MRI technique over the past three decades and situates its role in the management of patients with MM.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131199410","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

Assessment of the ponticulus posticus based on the skeletal relationship in strict lateral radiographs 基于严格侧位片骨骼关系的后桥评估

Imaging and Radiation Research Pub Date : 2008-08-21 DOI: 10.24294/irr.v4i1.1736

Jonathan Cook García Blásquez

{"title":"Assessment of the ponticulus posticus based on the skeletal relationship in strict lateral radiographs","authors":"Jonathan Cook García Blásquez","doi":"10.24294/irr.v4i1.1736","DOIUrl":"https://doi.org/10.24294/irr.v4i1.1736","url":null,"abstract":"Objective: To evaluate the ponticulus posticus according to the skeletal relationship found in strict lateral radiographs at the Centro Dental Docente of the Universidad Peruana Cayetano Heredia during the period 2015–2017, using the classification according to the degree of mineralization described by Selby and Steiner’s skeletal relationship classification. Material and methods: It was performed on digital strict lateral radiographs using a 20-inch screen using the SIDEXIS XG program, observing the degree of mineralization of the ponticulus posticus: without evidence of the bony spicule over the vertebral artery = absent bridge, when spicule formation and/or calcification was noted or evident in the middle of the bridge or incompletely = partial bridge, when the bony arch was evident finished visualizing = complete bridge and the classification of the skeletal relationship by measuring the ANB angle: Class I = 0–4°; Class II = >4° and Class III = <0°: the statistical analysis was done with the SPSS V program.22.0 for Windows using the Chi-square tests. Results: Of the 925 digital strict lateral radiographs evaluated, 283 radiographs were found to present ponticulus posticus and the highest frequency was found in the absent type (69.4%), the partial type (17.1%) and the complete type (13.5%). The ponticulus posticus was present in 25.1% of the female and 38.4% of the male. The skeletal relationship associated with ponticulus posticus was present in Class II (19.1%), Class I (10.4%) and Class III (1.1%). Conclusions: The ponticulus posticus is an anatomical variant present in 30.6% of cases. No statistically significant difference was found between the presence of ponticulus posticus and skeletal relationship or sex.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129665509","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

Topographic evaluation of sacroiliac joints by magnetic resonance imaging in patients with axial spondyloarthritis 轴型脊柱炎患者骶髂关节的磁共振成像地形图评价

Imaging and Radiation Research Pub Date : 2008-01-22 DOI: 10.24294/irr.v5i2.1756

L. Aivazoglou, O. R. Zotti, M. Pinheiro, Moacir Ribeiro De Castro Junior, A. Puchnick, A. Fernandes, E. de Ávila Fernandes

{"title":"Topographic evaluation of sacroiliac joints by magnetic resonance imaging in patients with axial spondyloarthritis","authors":"L. Aivazoglou, O. R. Zotti, M. Pinheiro, Moacir Ribeiro De Castro Junior, A. Puchnick, A. Fernandes, E. de Ávila Fernandes","doi":"10.24294/irr.v5i2.1756","DOIUrl":"https://doi.org/10.24294/irr.v5i2.1756","url":null,"abstract":"Objective: To evaluate the imaging features of spondyloarthritis on magnetic resonance imaging (MRI) of the sacroiliac (SI) joints in terms of topography (in thirds) and affected margin, since this aspect is rarely addressed in the literature. Methods: Cross-sectional study with MRI (1.5 T) evaluation of the SI in 16 patients with diagnosis of axial spondyloarthritis regarding the presence of acute (subchondral bone edema, enthesitis, synovitis and capsulitis) and chronic changes (erosions, subchondral bone sclerosis, bone bridging and fatty replacement), performed by two radiologists, blinded to clinical data. MRI findings were correlated with clinical data including age, disease duration, medications, HLA-B27, BASDAI, ASDAS-VHS and ASDAS-PCR, BASMI, BASFI, and mSASSS. Results: Bone edema pattern and erosions showed predominance in the upper third of SI (p = 0.050, p = 0.0014, respectively). There was a correlation between the time of disease and structural changes by affected third (p = 0.028-0.037), as well as the presence of bone bridges with BASMI (p = 0.028) and mSASSS (p = 0.014). Patients with osteitis of the lower third had higher ASDAS values (ESRV: p = 0.011 and CRP: p = 0.017). Conclusion: Chronic inflammatory changes and the pattern of bone edema predominated in the upper third of the SI, but there was also concomitant involvement of the middle or lower thirds of the joint. The localization of involvement in the upper third of the SI was insufficient to differentiate between degeneration and inflammation.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"765 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134131637","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

Radiation dose and image quality in a pediatric interventional cardiology team 儿童介入心脏病学小组的辐射剂量和图像质量

Imaging and Radiation Research Pub Date : 2007-09-19 DOI: 10.24294/irr.v2i1.1717

C. Ubeda, P. Miranda, Dandaro Dalmazzo

{"title":"Radiation dose and image quality in a pediatric interventional cardiology team","authors":"C. Ubeda, P. Miranda, Dandaro Dalmazzo","doi":"10.24294/irr.v2i1.1717","DOIUrl":"https://doi.org/10.24294/irr.v2i1.1717","url":null,"abstract":"The optimized methodology and results of the new characterization in terms of dose and image quality of the X-ray system used in the main pediatric hemodynamics service in Chile are presented. In addition, scattered dose rate values at the operator’s eye level are reported for all acquisition modes available in different thicknesses of absorbent media and angiography. The characterization was performed according to the European DIMOND and SENTINEL protocols adapted to pediatric procedures. The air kerma at the entrance surface (ESAK) was measured and the image quality parameters signal-to-noise ratio (SNR) and a figure of merit (FOM) were calculated. The scattered dose rate was measured in personal dose equivalent units. The ESAK for fluoroscopic modes ranged from 0.2 to 35.6 μGy/image when passing from 4 to 20 cm of polymethyl methacrylate (PMMA). For the cine mode, these values ranged from 2.8 to 160.1 μGy/image. The values of the image quality parameters showed a correct system configuration, although abnormal values were observed in the medium fluoroscopic mode. As for the scattered dose rate at the level of the cardiologist’s eyes, the highest value is PMMA with a thickness of 20 cm, where the cine mode reached 9.41 mSv·h-1. The differences found from previous evaluations can be explained by the deterioration of the system and the change of one of the X-ray tubes.","PeriodicalId":153727,"journal":{"name":"Imaging and Radiation Research","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114885515","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