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Score based assessment of implant-related post fusion MRI artifacts focused on different interbody disc spacers: An <i>in vitro</i>study

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Open Journal of Clinical Diagnostics 2012年第2期2卷 23-29页

作者： Thorsten Ernstberger Gabert Heidrich Hans-Michael Klinger mike herbert baums Center of Radiology Weilheim Ambulatory Healthcare Center Weilheim Germany Clinic for Spinal Surgery Klinikum Bad Bramstedt Bad Bramstedt Germany Department of Orthopaedic Surgery Friedrichsheim University of Frankfurt Frankfurt Germany Department of Orthopaedic Surgery University of Gottingen Gottingen Germany

Interbody disc spacers for anterior spine fusion are made of different materials, such as titanium alloys or carbon fiber reinforced polymers (CFRP). Implant-related susceptibility artifacts can decrease the quality of MRI scans. This cadaveric study aimed to demonstrate the extent that implant-related MRI artifacting affects the post fusion differentiation of the spinal canal (SC) and intervertebral disc space (IDS). In 6 cadaveric porcine spines, we evaluated the post-im- plantation MRI scans of a titanium and CFRP spacer that differed in shape and surface qualities. A spacer made of human cortical bone was used as a control. A defined evaluation unit was divided into regions of interest (ROI) to characterize the SC and IDS. Considering 15 different MRI sequences read independently by an interobserver-validated team of specialists artifact-affected image quality of the median MRI slice was rated on a modified score of 0-1-2-3. A maximum score of 15 points for the SC and 9 points for the IDS (100%) was possible. Turbo spin echo sequences produced the best scores for both spacers and the control. Only the control achieved a score of 100%. For the IDS the titanium and CFRP spacer maximally scored 0% and 74%, for the SC 80% and 99%, respectively. By using favored T1 TSE sequences the CFRP-spacer represented clear advantages in post fusion spinal imaging. Independent of artifact dimensions the used scoring system allowed us to create an implant-related ranking of MRI scan quality in reference to the bone control.

关键词： Interbody Disc Spacer Post Fusion MRI Imaging Artifacts Artifact Score

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Cartilage repair techniques of the talus: An update

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World Journal of Orthopedics 2014年第3期5卷 171-179页

作者： mike H baums Wolfgang Schultz Tanja Kostuj Hans-Michael Klinger University of G?ttingen Medical Centre Aukamm Klinik Gmb HD-65191 WiesbadenGermany Department of Orthopaedic Surgery University of G?ttingen Medical Centre (UMG)Georg-August-UniversityD-37099 G?ttingenGermany Institute of Medical Biometrics and Epidemiology University of Witten/HerdeckeD-58448 WittenGermany

Symptomatic chondral or osteochondral defects of the talus reduce the quality of life of many *** their pathomechanism is well understood,it is well known that different aetiologic factors play a role in their ***,it is well recognised that the talar articular cartilage strongly differs from that in the *** this fact,many recommendations for the management of talar cartilage defects are based on approaches that were developed for the *** treatment seems to work best in paediatric and adolescent patients with osteochondritis ***,depending on the size of the lesions,surgical approaches are necessary to treat many of these *** marrow stimulation techniques may achieve good results in small *** lesions may be treated by open procedures such as osteochondral autograft transfer or allograft *** chondrocyte transplantation,as a restorative procedure,is well investigated in the knee and has been applied in the talus with increasing popularity and promising results but the evidence to date is *** goals of the current article are to summarise the different options for treating chondral and osteochondral defects of the talus and review the available literature.

关键词： Cartilage defect Talus Repair techniques Arthroscopy Marrow stimulation Mosaicplasty Autologous chondrocyte implantation

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省时节能的iFlash~间歇式前处理/染色工艺

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印染 2007年第20期33卷 35-36页

作者： Christian Drfler herbert Bachus Birgit Holz Bernd Horrer mike Flatau Reinhard Denning 邓琴 CHT R.Beitlich GmbH 上海佳和化工厂有限公司上海201415

介绍了iFlash间歇式前处理／染色系统的特点，如低温低碱漂白、高效皂洗等；就加工时间、处理效果及加工成本与常规前处理／染色工艺进行了比较。实践证明，iFlash系统具有省时、省水、节能、环保、改善织物性能等特点。

关键词：前处理染色间歇法节能环境保护

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