The open medical imaging journal最新文献_第2页

Technical Tips for Endovascular Aortic Repair Using the Gore Excluder Abdominal Stent-Graft: Endo-Wedge Technique and Scrum Technique 血管内主动脉瓣修复的技术提示:血管内楔形技术和Scrum技术

The open medical imaging journal Pub Date : 2014-01-27 DOI: 10.2174/1874347101408010008

T. Banno, R. Kato*, Ryota Hanaoka, Hokuto Akamatsu, K. Kaneko, H. Toyama

{"title":"Technical Tips for Endovascular Aortic Repair Using the Gore Excluder Abdominal Stent-Graft: Endo-Wedge Technique and Scrum Technique","authors":"T. Banno, R. Kato*, Ryota Hanaoka, Hokuto Akamatsu, K. Kaneko, H. Toyama","doi":"10.2174/1874347101408010008","DOIUrl":"https://doi.org/10.2174/1874347101408010008","url":null,"abstract":"s: When performing endovascular aortic repair (EVAR) procedures, clinicians sometimes encounter cases in which the indications for EVAR are beyond the instruction for use (IFU). In EVAR, proximal neck fixation is the most important factor. This report describes several techniques and tips for EVAR in cases presenting with a difficult short neck or angled neck, especially when using the Gore Excluder. Endo-wedge techniques (EWT), including non-sheathassisted EWT with sheath-assisted strategies, are presented. We describe the scrum technique, which is a special procedure that is only feasible when using the Gore Excluder. In this technique, intentional wire bending around the proximal neck portion occurs by pushing from both sides of the guidewire. This technique is applicable in cases with a sharply angled neck. The scrum with EWT is a more precise strategy for cases with a short or angled neck. Other troublesome cases include limb occlusion caused by weak points in the Gore Excluder® body and legs. The very rare complication of stent-graft collapse is also reviewed.","PeriodicalId":90366,"journal":{"name":"The open medical imaging journal","volume":"30 1","pages":"8-21"},"PeriodicalIF":0.0,"publicationDate":"2014-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74562174","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: 1

On the temporal fidelity of nonlinear inverse reconstructions for real- time MRI – The motion challenge. 实时MRI非线性逆重建的时间保真度——运动挑战。

The open medical imaging journal Pub Date : 2014-01-23 DOI: 10.2174/1874347101408010001

J. Frahm, Sebastian Schätz, Markus Untenberger, Shuo Zhang, Dirk Voit, K. Merboldt, J. Sohns, J. Lotz, M. Uecker

{"title":"On the temporal fidelity of nonlinear inverse reconstructions for real- time MRI – The motion challenge.","authors":"J. Frahm, Sebastian Schätz, Markus Untenberger, Shuo Zhang, Dirk Voit, K. Merboldt, J. Sohns, J. Lotz, M. Uecker","doi":"10.2174/1874347101408010001","DOIUrl":"https://doi.org/10.2174/1874347101408010001","url":null,"abstract":"Purpose: To evaluate the temporal accuracy of a self-consistent nonlinear inverse reconstruction method (NLINV) for real-time MRI using highly undersampled radial gradient-echo sequences and to present an open source framework for the motion assessment of real-time MRI methods. Methods: Serial image reconstructions by NLINV combine a joint estimation of individual frames and corresponding coil sensitivities with temporal regularization to a preceding frame. The temporal fidelity of the method was determined with a phantom consisting of water-filled tubes rotating at defined angular velocity. The conditions tested correspond to real- time cardiac MRI using SSFP contrast at 1.5 T (40 ms resolution) and T1 contrast at 3.0 T (33 ms and 18 ms resolution). In addition, the performance of a post-processing temporal median filter was evaluated. Results: NLINV reconstructions without temporal filtering yield accurate estimations as long as the speed of a small moving object corresponds to a spatial displacement during the acquisition of a single frame which is smaller than the object itself. Faster movements may lead to geometric distortions. For small objects moving at high velocity, a median filter may severely compromise the spatiotemporal accuracy. Conclusion: NLINV reconstructions offer excellent temporal fidelity as long as the image acquisition time is short enough to adequately sample (\"freeze\") the object movement. Temporal filtering should be applied with caution. The motion framework emerges as a valuable tool for the evaluation of real-time MRI methods.","PeriodicalId":90366,"journal":{"name":"The open medical imaging journal","volume":"56 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80690259","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: 47

Interactive 3D Analysis of Blood Vessel Trees and Collateral Vessel Volumes in Magnetic Resonance Angiograms in the Mouse Ischemic Hindlimb Model. 小鼠后肢缺血模型磁共振血管成像血管树和侧支血管体积的交互式三维分析。

The open medical imaging journal Pub Date : 2013-10-31 DOI: 10.2174/1874347101307010019

Peter C Marks, Marilena Preda, Terry Henderson, Lucy Liaw, Volkhard Lindner, Robert E Friesel, Ilka M Pinz

{"title":"Interactive 3D Analysis of Blood Vessel Trees and Collateral Vessel Volumes in Magnetic Resonance Angiograms in the Mouse Ischemic Hindlimb Model.","authors":"Peter C Marks, Marilena Preda, Terry Henderson, Lucy Liaw, Volkhard Lindner, Robert E Friesel, Ilka M Pinz","doi":"10.2174/1874347101307010019","DOIUrl":"https://doi.org/10.2174/1874347101307010019","url":null,"abstract":"<p><p>The quantitative analysis of blood vessel volumes from magnetic resonance angiograms (MRA) or μCT images is difficult and time-consuming. This fact, when combined with a study that involves multiple scans of multiple subjects, can represent a significant portion of research time. In order to enhance analysis options and to provide an automated and fast analysis method, we developed a software plugin for the ImageJ and Fiji image processing frameworks that enables the quick and reproducible volume quantification of blood vessel segments. The novel plugin named Volume Calculator (VolCal), accepts any binary (thresholded) image and produces a three-dimensional schematic representation of the vasculature that can be directly manipulated by the investigator. Using MRAs of the mouse hindlimb ischemia model, we demonstrate quick and reproducible blood vessel volume calculations with 95 - 98% accuracy. In clinical settings this software may enhance image interpretation and the speed of data analysis and thus enhance intervention decisions for example in peripheral vascular disease or aneurysms. In summary, we provide a novel, fast and interactive quantification of blood vessel volumes for single blood vessels or sets of vessel segments with particular focus on collateral formation after an ischemic insult.</p>","PeriodicalId":90366,"journal":{"name":"The open medical imaging journal","volume":"7 ","pages":"19-27"},"PeriodicalIF":0.0,"publicationDate":"2013-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929959/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32150733","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}

引用次数: 11

A Combined Fractal and Wavelet Angiography Image Compression Approach 一种分形和小波联合血管造影图像压缩方法

The open medical imaging journal Pub Date : 2013-09-27 DOI: 10.2174/1874347101307010009

A. Al-Fahoum, B. Harb

引用次数: 17

A Polynomial Fitting Improved Bayesian Reconstruction Method for Whole Brain Volumetric MRSI Metabolite Images 全脑磁共振成像代谢产物图像的多项式拟合改进贝叶斯重建方法

The open medical imaging journal Pub Date : 2013-02-07 DOI: 10.2174/1874347101307010001

Yufang Bao, A. Maudsley

引用次数: 0

Cuda Parallel Implementation of Image Reconstruction Algorithm for Positron Emission Tomography Cuda并行实现正电子发射断层成像图像重建算法

The open medical imaging journal Pub Date : 2012-12-14 DOI: 10.2174/1874347101206010108

Belzunce Ma, Verrastro Ca, E. Venialgo, Cohen Im

引用次数: 12

Primary Central Nervous System Lymphoma with Lateral Ventricle Involvement 原发性中枢神经系统淋巴瘤伴侧脑室受累

The open medical imaging journal Pub Date : 2012-10-05 DOI: 10.2174/1874347101206010103

Y. Oie, K. Murayama, S. Nagahisa, M. Abe, H. Toyama, K. Katada

引用次数: 0

Size Dependent Ultrasound Characteristics in Histologically Confirmed Papillary Thyroid Carcinomas: A Multivariate Analysis 组织学证实的甲状腺乳头状癌的大小依赖超声特征:多变量分析

The open medical imaging journal Pub Date : 2012-08-08 DOI: 10.2174/1874347101206010097

M. Cordes, P. Kondrat, Karen Horstrup, T. Kuwert, M. Sasiadek

{"title":"Size Dependent Ultrasound Characteristics in Histologically Confirmed Papillary Thyroid Carcinomas: A Multivariate Analysis","authors":"M. Cordes, P. Kondrat, Karen Horstrup, T. Kuwert, M. Sasiadek","doi":"10.2174/1874347101206010097","DOIUrl":"https://doi.org/10.2174/1874347101206010097","url":null,"abstract":"Background: Epidemiologic data revealed an increasing incidence of papillary carcinomas (PTCs) in the German population. There is some evidence that the size of resected PTCs has decreased during the last few years. Purpose: The aim of the present study was to test the hypothesis that the sonographic characteristics of PTCs vary with size. Material/Methods: Consecutive PTCs were histologically confirmed in 41 patients. Ultrasound examinations of these 50 PTCs were reevaluated retrospectively and classified according to five sonographic criteria. Results: It could be shown that the sonographic shape (p < 0.001), the contour (p = 0.024), the structure (p = 0.04), the echogenicity (p < 0.001) and calcifications (p = 0.008) varied with the size of the neoplasms. By factoranalysis a factor FPTC with an eigenvalue of 1.89 could be extracted from the data on which the sonographic structure, the ontour and the presence of calcifications had the strongest impact with factorloadings of 0.74, 0.68 and 0.61, respectively. Conclusion: The knowledge of the variation of the ultrasound characteristics should be of assistance for the sonographic classification of PTCs. In this context microcarcinomas usually do not display cystic components. However, they may show microcalcifications. Cystic components, hyperechogenicity and the taller-than-wide sign are predominantly seen in larger PTCs.","PeriodicalId":90366,"journal":{"name":"The open medical imaging journal","volume":"39 1","pages":"97-102"},"PeriodicalIF":0.0,"publicationDate":"2012-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80515487","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: 3

Automated Voxel-Wise Brain DTI Analysis of Fitness and Aging 自动体素脑DTI分析健康和衰老

The open medical imaging journal Pub Date : 2012-06-01 DOI: 10.2174/1874347101206010080

Zhexing Liu, Mahshid Farzinfar, L. Katz, Hongtu Zhu, C. Goodlett, G. Gerig, M. Styner, B. Marks

引用次数: 9

Sentinel node navigation surgery with 99mTc-tin colloid in breast cancer: Radiation safety considerations 99mtc -锡胶体在乳腺癌前哨淋巴结导航手术中的放射安全性考虑

The open medical imaging journal Pub Date : 2012-06-01 DOI: 10.2174/1874347101206010089

K. Ejiri, K. Minami, H. Toyama, Gen Kudo, Hidekazu Hattori, N. Kobayashi, Masaki Kato, Masanobu Ishiguro, H. Fujii, M. Kuroda, T. Utsumi, K. Iwase, K. Katada

{"title":"Sentinel node navigation surgery with 99mTc-tin colloid in breast cancer: Radiation safety considerations","authors":"K. Ejiri, K. Minami, H. Toyama, Gen Kudo, Hidekazu Hattori, N. Kobayashi, Masaki Kato, Masanobu Ishiguro, H. Fujii, M. Kuroda, T. Utsumi, K. Iwase, K. Katada","doi":"10.2174/1874347101206010089","DOIUrl":"https://doi.org/10.2174/1874347101206010089","url":null,"abstract":"Purpose: The incident at the Fukushima Daiichi nuclear power station in 2011 has again raised concerns with the public regarding radiation exposure, especially so in medical workers and patients undergoing treatment involving the use of radiation. Radioisotopes are currently used during sentinel node navigation surgery (SNNS) in operating rooms without radiation monitoring. To re-evaluate the safety issues, the potential effective dose (Epoten) from 99m Tc-tin (-Sn) colloid in breast cancer surgery was estimated and personal dose equivalents, Hp(10) and Hp(0.07), were measured during SNNS. Materials and methods: Seventeen breast cancer patients were enrolled. One day before SNNS, 99m Tc-Sn colloid was injected around the tumor and radiation exposure rates were measured using survey meters. Personal dose equivalents for the surgical workers were measured. Hp(10) and Hp(0.07) for the body and Hp(0.07) for the hands were recorded using semiconductor detectors and ring-type glass dosimeters. Results: The maximum Epoten was 29 μSv per 74 MBq injection. The maximum Hp(10) for the primary and assisting surgeons, nurse, and anesthetist was 3.7, 1.4, 0.3 and 0.6 μSv per SNNS, respectively. The maximum Hp(0.07) for the hands was 100 μSv. Maximum radiocontamination 20 times higher than background (0.05 μSv/h) was detected in bloody gauze. Conclusion: The workers' radiation dose exposure from SNNS was not high, although radiation management such as a temporary cooling off period may be required.","PeriodicalId":90366,"journal":{"name":"The open medical imaging journal","volume":"6 1","pages":"89-96"},"PeriodicalIF":0.0,"publicationDate":"2012-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81239454","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