Diagnostic imaging最新文献_第4页

Survival and Enhancing Fraction (enf) in Glioblastoma Multiforme (GBM) 多形性胶质母细胞瘤(GBM)的存活率和增强分数(enf)

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/rdi.1000118

S. Mills, G. Thompson, G. Buonaccorsi, Parker Gjm, A. Jackson

{"title":"Survival and Enhancing Fraction (enf) in Glioblastoma Multiforme (GBM)","authors":"S. Mills, G. Thompson, G. Buonaccorsi, Parker Gjm, A. Jackson","doi":"10.15761/rdi.1000118","DOIUrl":"https://doi.org/10.15761/rdi.1000118","url":null,"abstract":"In GBM, enhancing fraction derived from the initial area under the contrast agent concentration curve ( IAUC ), EnF IAUC 60 , correlates with the MRI parameter K trans (contrast agent transfer coefficient). Thresholding voxels as enhancing when IAUC 60>2.5mMol.s (EnF IAUC 60>2.5 ) separates high from low grade glioma. The objectives were to evaluate the feasibility of deriving a signal intensity based enhancing fraction (EnF SI ), assess its relationship with EnF IAUC 60 measures and examine relationships with survival in GBM. 30 GBM had pre-operative pre and post-contrast T 1 -weighted imaging and a T 1 -DCE-MRI protocol. EnF IAUC 60>0 and EnF IAUC 60>2.5 were generated from IAUC 60 maps. EnF SI was derived from pre and post-contrast T1-weighted sequences. Bland/Altman plots assessed agreement between EnF measures. A multivariate Cox regression analysis examined the prognostic value of EnF measures. The mean difference between EnF IAUC 60>0 and EnF SI was 0.0378 (range -0.112-0.264, std. dev 0.07573) and between EnF IAUC 60>2.5 and EnF SI was -0.2492 (range -0.6096-0.2416, std. dev 0.2154). EnF SI demonstrated good correlation with both EnF IAUC 60>0 and EnF IAUC 60>2.5 but was not directly interchangeable with either metric. Increased EnF IAUC 60>0 was associated with prolonged survival (p=0.008). A non-significant trend was seen with EnF SI (p=0.061). EnF SI can be derived from conventional imaging and correlates with IAUC 60 based metrics. Furthermore, enhancing fraction conveys potential prognostic information in GBM.","PeriodicalId":11275,"journal":{"name":"Diagnostic imaging","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86245912","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

MR imaging of uncommon complications of transforaminal 经椎间孔少见并发症的磁共振成像分析

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/RDI.1000113

Tan Ap, Quek St

引用次数: 0

Functional magnetic resonance imaging: fuzzy inference analysis 功能磁共振成像:模糊推理分析

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/rdi.1000111

Bouharati Imane, Bouharati Khaoula, Bouharati Saddek, H. Mokhtar

{"title":"Functional magnetic resonance imaging: fuzzy inference analysis","authors":"Bouharati Imane, Bouharati Khaoula, Bouharati Saddek, H. Mokhtar","doi":"10.15761/rdi.1000111","DOIUrl":"https://doi.org/10.15761/rdi.1000111","url":null,"abstract":"Aim: Nowadays, functional MRI is widely used in the study of brain functions. If it has the advantage of being non-invasive and allows delimiting the zones that are activated at each stimulus in 3D, it presents several deficiencies. On the psychotic studies, the zones which activate induce the analyst in error in view of the complexity and the differences between individuals and their states of anxiety. Even minimal movements of the head influence the result; the response of the vascular system signal is delayed after the stimulus...etc. A heavy numerical processing in particular in statistical analyzes is necessary to refine the images. Despite this, difficulties persist. Method: In this study, a fuzzy logic system in this analysis is proposed. Viewing the complexity of the system, the variables that define the constructed image are considered as inaccurate variables and therefore fuzzy variable. The motor and emotional stimulus, the parasites movements, the anxiety state are considerate as inputs system. The quality of image constructed is the output system. The data base constructed permits adjusting input variables for optimal image. Conclusion: The proposed system allows defining the optimal interaction of the different factors for an optimal image. Considering the variables of input and output as fuzzy variables thus imprecise, this makes it possible to overcome the deficiencies of the system Correspondence to: Bouharati Saddek, Laboratory of intelligent systems UFAS Setif1 University, Setif, Algeira; Tel: +213771816302; E-mail: sbouharati@univ-setif.dz","PeriodicalId":11275,"journal":{"name":"Diagnostic imaging","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80889626","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: 2

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults 定量和定性评价宽体积(WV)和螺旋采集在320个检测器行计算机断层扫描上用于成人腹部骨盆区域的探测

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/rdi.1000116

C. Roy, R. Quin, A. Labani, P. Leyendecker, L. Mertz, M. Ohana

{"title":"Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults","authors":"C. Roy, R. Quin, A. Labani, P. Leyendecker, L. Mertz, M. Ohana","doi":"10.15761/rdi.1000116","DOIUrl":"https://doi.org/10.15761/rdi.1000116","url":null,"abstract":"Purpose: To evaluate the best protocol to be used in WV mode for the abdominopelvic region in terms of radiation dose and image quality by comparison with the helical mode. Methods and materials: This study was performed on a 320 x 0.5 mm detector row CT unit. By using several simulations on topograms data and phantoms analysis, we registered CTDIvol. Then, a clinical study on CTUrography was performed, each patient being its own standard. Results: The collimation of 10 cm (200 x 0.5 mm) with 5 volumes had the lowest CTDIvol. This can be explained by several physical phenomena. In the clinical study, the average radiation dose reduction was found to be at 44.03% ± 0.36% (p<0.001). Concerning the qualitative evaluation of the stitching of different volumes and the overall image quality, it was found excellent. Conclusion: Wide Volume CT scanning using 5 volumes of 10cm (200x0.5mm) significantly reduces the radiation dose with an excellent image quality. Correspondence to: Catherine Roy, Department of Radiology, University Hospital of Strasbourg – New Civil Hospital, Strasbourg Cedex, France; Tel: +333369550731; Fax: +3333691815; E-mail: catherine.roy@chru-strasbourg.fr","PeriodicalId":11275,"journal":{"name":"Diagnostic imaging","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74719843","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: 2

Unilateral condylar hyperplasia recurrence after orthognathic surgery: a case report 正颌手术后单侧髁突增生复发1例

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/rdi.1000108

G. Follacchio, Maria Ricci, Ramieri, Vellone, Viviana Frantellizzi, M. Liberatore, F. Monteleone, Liana Civitelli, P. Cascone, G. Vincentis

引用次数: 0

Pneumomediastinum in a smoking free-base cocaine abuser during sexual intercourse 纵隔气肿吸烟游离基可卡因滥用者性交时

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/RDI.1000110

G. Gioia

引用次数: 1

A case of the appendix myxomas 阑尾黏液瘤1例

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/RDI.1000102

O. Tanaka, M. Hattori, Kentarou Nonaka, Yuko Yamada, Akihiro Tsuzaki, Tomomi Kunieda, E. Yama

引用次数: 0

Foxels for high flux, high resolution computed tomography (foxelct) Using broad x-ray focal spots Foxels用于高通量，高分辨率计算机断层扫描(foxelct)，使用宽x射线焦点

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/RDI.1000103

Graham Alvare, R. Gordon

引用次数: 3

Radiography and transmission measurements on gold and silver from the moche tomb “Señora de Cao” 莫切墓“Señora de Cao”金银的射线照相及透射测量

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/RDI.1000106

R. Cesareo, A. Bustamante, S. Azeredo, R. Lopes, R. Jordan, Arabel Fernández, E. GiovanniEGigante

引用次数: 10

Vocal fold paralysis following fine needle aspiration of the thyroid gland complicated by a neck hematoma 甲状腺细针穿刺后声带麻痹并发颈部血肿

Diagnostic imaging Pub Date : 2017-01-01 DOI: 10.15761/RDI.1000109

Z. ZidanMahmood, A. Brenner, N. Carmel, Y. Oestreicher‐Kedem

{"title":"Vocal fold paralysis following fine needle aspiration of the thyroid gland complicated by a neck hematoma","authors":"Z. ZidanMahmood, A. Brenner, N. Carmel, Y. Oestreicher‐Kedem","doi":"10.15761/RDI.1000109","DOIUrl":"https://doi.org/10.15761/RDI.1000109","url":null,"abstract":"Objective: To describe the mechanism and clinical course of vocal fold paralysis (VFP) following fine needle aspiration (FNA) of the thyroid gland. Case report: An 80-year old female presented to the emergency room due to hoarseness, dyspnea, and neck swelling. Her history was significant for FNA of the thyroid gland eight days earlier. Physical examination revealed left VFP and a left neck mass. Computed tomography of the neck was suggestive of a left neck hematoma. She was treated conservatively and her pain and neck swelling subsided gradually. Good left vocal movement was observed four months later. Conclusion: VFP is a rare complication of FNA of the thyroid gland. Physicians performing this procedure should be aware of this complication. We suggest that this sequela be discussed with the patient prior to the procedure and be included in the informed patient consent form. Correspondence to: Yael Oestreicher-Kedem, Department of Otolaryngology, Head & Neck Surgery and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center 6 Weizman St. Tel-Aviv, Israel, Tel: +972-52-6212179; Fax: +972-36052905; E-mail: dkyo@013.net","PeriodicalId":11275,"journal":{"name":"Diagnostic imaging","volume":"153 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78198680","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