Article
Radiology, Nuclear Medicine & Medical Imaging
Agazi Samuel Tesfai, Andreas Vollmer, Ali Caglar Ozen, Moritz Braig, Wiebke Semper-Hogg, Markus Jorg Altenburger, Ute Ludwig, Michael Bock
Summary: Accurate visualization of dental root canals is crucial for proper diagnosis and treatment. This study demonstrates the improvement of a new dental MRI coil in terms of signal-to-noise ratio and visibility. The results show that the intraoral flexible coil provides better image quality and visibility compared to conventional coils.
INVESTIGATIVE RADIOLOGY
(2022)
Article
Engineering, Biomedical
Ali Caglar Ozen, Djaudat Idiyatullin, Gregor Adriany, Steve Jungst, Naoharu Kobayashi, Beth Groenke, Michael Bock, Michael Garwood, Donald Nixdorf
Summary: This study designed an intraoral dipole antenna and combined it with an extraoral coil to improve the quality of dental MRI by enhancing transmit efficiency and homogeneity. The results demonstrated that the intraoral dipole design can increase imaging depth and reduce interference signals from the tongue.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2021)
Article
Dentistry, Oral Surgery & Medicine
Shuting Chiu, Yeh Lee, Min Liu, Hu Chen, Hongqiang Ye, Yunsong Liu
Summary: This study compared the usefulness of intraoral photographs and clinical examinations for assessing the marginal adaptation and gingival status of full-crown restorations. The results showed that an intraoral camera is a feasible and valid diagnostic aid for evaluating the marginal adaptation and gingival status of full-crown restorations.
Article
Radiology, Nuclear Medicine & Medical Imaging
Ali Caglar Oezen, Serhat Ilbey, Feng Jia, Djaudat Idiyatullin, Michael Garwood, Donald R. Nixdorf, Michael Bock
Summary: The purpose of this study was to improve the design of transverse intraoral loop coil for high-resolution dental MRI. The modified coil showed increased sensitivity, improved image SNR, and reduced unwanted signals and eddy currents. The proposed new coil provided higher SNR at specific regions of interest and improved patient comfort.
MAGNETIC RESONANCE IN MEDICINE
(2023)
Article
Dentistry, Oral Surgery & Medicine
Nikolai Miotk, Franz Sebastian Schwindling, Moussa Zidan, Alexander Juerchott, Peter Rammelsberg, Zahra Hosseini, Mathias Nittka, Sabine Heiland, Martin Bendszus, Tim Hilgenfeld
Summary: The reliability and accuracy of intraoral radiography (IR), cone-beam-computed tomography (CBCT), and dental magnetic resonance imaging (dMRI) in measuring peri-implant bone defects around single zirconia implants were evaluated. dMRI showed superior accuracy in measuring defect depth compared to IR and CBCT.
JOURNAL OF DENTISTRY
(2023)
Article
Engineering, Biomedical
Nikolaos Kyventidis, Christos Angelopoulos
Summary: Automated classification of anatomical classes in digital intraoral radiographs is feasible with high accuracy using advanced deep learning models, which are more robust to image distortions compared to baseline models.
INTERNATIONAL JOURNAL OF COMPUTER ASSISTED RADIOLOGY AND SURGERY
(2021)
Article
Computer Science, Information Systems
Natasa Prosen, Jure Domajnko, Miro Milanovic
Summary: This paper introduces a wireless power transfer system using a novel structure of transmitting/receiving double DD coils. The system can transmit power simultaneously and independently to two receiver coils without interference, leading to increased power transfer efficiency.
Article
Dentistry, Oral Surgery & Medicine
Shanon Patel, Taranpreet Puri, Francesco Mannocci, Aram Navai
Summary: The study compared the diagnostic accuracy and confidence levels of clinicians in diagnosing traumatic dental injuries using PRs, USO radiographs, and CBCT imaging. Results showed that CBCT imaging had significantly higher sensitivity and accuracy in diagnosing TDIs, leading to increased confidence in diagnosis and treatment planning.
JOURNAL OF ENDODONTICS
(2021)
Article
Chemistry, Physical
Alfonso Jornet-Garcia, Arturo Sanchez-Perez, Jose Maria Montoya-Carralero, Maria Jose Moya-Villaescusa
Summary: Dental implants made of titanium or titanium alloys can generate harmful bimetallic currents in the electrolytic medium. This study developed a system to measure the potentials generated in vivo, allowing assessment of the effects of these currents on dental implants.
Article
Engineering, Electrical & Electronic
Caio M. de Miranda, Sergio F. Pichorim
Summary: A common trend in wireless power transfer is the use of multiple coils to increase efficiency, with the 3-coil system being of particular interest due to its high efficiency. This paper presents a self-resonant 3-coil wireless power transfer system using open-bifilar coils, and validates its effectiveness.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2022)
Article
Telecommunications
Smita Salagare, Ramjee Prasad
Summary: Dental caries is a complex oral disease caused by various factors, but with new technologies, it is possible to monitor the factors leading to dental caries for prevention and early detection. The combination of Internet of Dental Things, intraoral wireless sensors, and tele dentistry can achieve the prevention and detection of dental caries in its early stages.
WIRELESS PERSONAL COMMUNICATIONS
(2022)
Article
Engineering, Biomedical
Aasrith Ganti, Tracy Wynn, Jenshan Lin
Summary: This paper discusses the use of RF surface coils in MRI systems, highlighting the benefits of using surface coil arrays for higher image quality and faster scan times. It proposes a new design for energy harvesting using wireless technology and emphasizes the importance of the decoupler for safety and image quality.
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Jinde Wu, Xin Dai, Yue Sun, Yanling Li
Summary: This article proposes a flexible repeater power transmission mode for multinode WPT system, allowing for flexible switching of node roles to meet dynamic power transmission requirements, utilizing reusing topology. Experimental results confirm the effectiveness of the method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Naoui Mohamed, Flah Aymen, Mohammed Alqarni, Rania A. Turky, Basem Alamri, Ziad M. Ali, Shady H. E. Abdel Aleem
Summary: This paper presents a method to improve the performance of dynamic wireless recharge system by adding receiver coils and providing a dynamic mathematical model to achieve maximum charging power. The experimental tests confirmed the effectiveness of the proposed model.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Article
Dentistry, Oral Surgery & Medicine
Marko Kuralt, Alja Cmok Kucic, Rok Gaspersic, Jan Groselj, Marjeta Knez, Ales Fidler
Summary: The study introduces a method using surface curvature estimation of intraoral scans to objectively evaluate gingival shape. The method has been tested and demonstrated to be precise and highly reproducible, enabling the detection of subtle changes in gingival shape. Careful selection of parameters is necessary for accurate estimation and quantification.
Article
Radiology, Nuclear Medicine & Medical Imaging
Ali Caglar Oezen, Felix Spreter, Waldemar Schimpf, Johannes Fischer, Serhat Ilbey, Simon Reiss, Alexander Maier, Dominik von Elverfeldt, Timo Heidt, Constantin von zur Muehlen, Michael Bock
Summary: This study presents an RF coil system with 8-channel transmit and 8-channel receive coil arrays for F-19 MRI of large animals. The Tx efficiency and homogeneity of the 8-element loop coil array were evaluated using simulated pig models. An 8-channel Rx coil array consisting of a flexible 6-channel posterior and a 2-channel planar anterior array was designed and validated through measurements in a grid phantom and ex vivo on a pig model with PFOB-filled tubes inserted in the thorax.
MAGNETIC RESONANCE IN MEDICINE
(2023)
Article
Dentistry, Oral Surgery & Medicine
Florian Kernen, Dominik Braendle, Oliver Wagendorf, Mario Recca, Juergen Mehrhof, Kirstin Vach, Susanne Nahles, Katja Nelson, Tabea Fluegge
Summary: This study evaluated the accuracy of an intraoral scan aid for scanning multiple implants in the edentulous arch. By comparing the scans of 87 implants in 22 patients, it was found that the scan aid significantly improved scanning accuracy and success rate.
CLINICAL ORAL IMPLANTS RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Adhara Lazaro, Patrick Stoll, Dominik von Elverfeldt, Wolfgang Kreisel, Peter Deibert
Summary: This study investigated the potential correlation between mean arterial pressure (MAP) and portal venous pressure (PVP) in rats with healthy livers. The results showed that changes in MAP are followed by changes in PVP with a distinct time lag, indicating a cause-and-effect relationship. The study also revealed that Sildenafil influences portal pressure. Further studies should be conducted in a model with cirrhotic livers to evaluate the effects of vasoactive drugs for therapy of portal hypertension.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Andreas B. Schmidt, James Eills, Laurynas Dagys, Martin Gierse, Michael Bock, Sebastian Lucas, Michael Bock, Ilai Schwartz, Maxim Zaitsev, Eduard Y. Chekmenev, Stephan Knecht
Summary: Efficient and rapid pyruvate hyperpolarization is achieved through signal amplification by reversible exchange (SABRE) with parahydrogen. This approach allows for high levels of polarization and paves the way for future in vivo translation of carbon-13 hyperpolarized molecular imaging probes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Radiology, Nuclear Medicine & Medical Imaging
Adrienne E. Campbell-Washburn, Kathryn E. Keenan, Peng Hu, John P. Mugler, Krishna S. Nayak, Andrew G. Webb, Johnes Obungoloch, Kevin N. Sheth, Juergen Hennig, Matthew S. Rosen, Najat Salameh, Daniel K. Sodickson, Joel M. Stein, Jose P. Marques, Orlando P. Simonetti
Summary: The first ISMRM Workshop on Low-Field MRI was held virtually in March 2022, discussing recent advancements in low field MRI technology and its clinical applications. With 368 registrants from 24 countries, the workshop included invited talks, abstract presentations, panel discussions, and live scanner demonstrations. The workshop emphasized the potential of low-field MRI in expanding MRI usage through cost reduction, portability, and ease of installation, as well as the challenges in overcoming SNR limitations and establishing clinical value.
MAGNETIC RESONANCE IN MEDICINE
(2023)
Article
Multidisciplinary Sciences
Tabea Fluegge, Robert Gaudin, Antonis Sabatakakis, Daniel Troeltzsch, Max Heiland, Niels van Nistelrooij, Shankeeth Vinayahalingam
Summary: Oral squamous cell carcinoma (OSCC) is a common malignancy with a high mortality rate. Early detection is crucial for effective treatment. This study successfully developed a deep learning-based method using clinical photographs to automatically detect OSCC. The method achieved high accuracy and can assist clinicians in early detection, improving survival rates and quality of life for patients.
SCIENTIFIC REPORTS
(2023)
Article
Biochemistry & Molecular Biology
Luise Schlotterose, Mariya S. Pravdivtseva, Frowin Ellermann, Olav Jansen, Jan-Bernd Hoevener, Frank D. Soennichsen, Francois Cossais, Ralph Lucius, Kirsten Hattermann
Summary: The role of microglia cells in neurodegenerative diseases has been increasingly recognized. Activation of microglia cells is believed to be involved in the progression of diseases like Alzheimer's or Parkinson's disease. In this study, the researchers investigated the effects of the natural antioxidant resveratrol on human microglia cells. They found that resveratrol reduced inflammation, increased the release of insulin-like growth factor 1, decreased glucose uptake, lowered mitochondrial activity, and attenuated cellular metabolism in microglia cells. The study focused on changes in metabolism without any external stressors and demonstrated the potential protective effects of resveratrol against neuroinflammation.
Article
Biochemistry & Molecular Biology
Carolin Kubelt, Dana Hellmold, Eva Peschke, Margarethe Hauck, Olga Will, Fabian Schuett, Ralph Lucius, Rainer Adelung, Regina Scherliess, Jan-Bernd Hoevener, Olav Jansen, Michael Synowitz, Janka Held-Feindt
Summary: Local drug delivery systems (LDDS) are potential therapies for glioblastoma (GBM), but their success has been limited. Establishing GBM animal models is crucial for evaluating LDDS, but few reports detail the process. In this study, a partial resection glioma model in rats was successfully established and used to evaluate the efficiency of LDDS. The results provide a powerful tool for future testing of these promising systems in clinical applications.
Article
Multidisciplinary Sciences
Frowin Ellermann, Aidan Sirbu, Arne Brahms, Charbel Assaf, Rainer Herges, Jan-Bernd Hoevener, Andrey N. Pravdivtsev
Summary: This article presents a portable and automated polarizer that can perform nuclear magnetic resonance imaging in a 0.5 T magnetic field and has the ability to polarize nuclear spins. The translation of hyperpolarization technology into routine use in laboratories and medical centers is hindered by the lack of portable and cost-effective polarizers.
NATURE COMMUNICATIONS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Oliver Wagendorf, Susanne Nahles, Kirstin Vach, Florian Kernen, Stefan Zachow, Max Heiland, Tabea Fluegge
Summary: This study investigated the influence of teeth and dental restorations on the gray value distributions of the facial skeleton in cone-beam computed tomography (CBCT). Gray value selection procedures were performed on 20 maxillae and 20 mandibles, including partially and fully edentulous cases, using manual and automated threshold selection. The study found that teeth and dental restorations affected the gray values and segmentation results in CBCT, highlighting the importance of accurate bone segmentation for surgical protocols.
INTERNATIONAL JOURNAL OF IMPLANT DENTISTRY
(2023)
Review
Radiology, Nuclear Medicine & Medical Imaging
Mark E. Ladd, Harald H. Quick, Oliver Speck, Michael Bock, Arnd Doerfler, Michael Forsting, Juergen Hennig, Bernd Ittermann, Harald E. Moeller, Armin M. Nagel, Thoralf Niendorf, Stefan Remy, Tobias Schaeffter, Klaus Scheffler, Heinz-Peter Schlemmer, Sebastian Schmitter, Laura Schreiber, N. Jon Shah, Tony Stoecker, Michael Uder, Arno Villringer, Nikolaus Weiskopf, Moritz Zaiss, Maxim Zaitsev
Summary: Multiple sites in Germany operate human MRI systems at 7 Tesla or 9.4 Tesla. The German Ultrahigh Field Imaging (GUFI) network was established in 2013 to facilitate research cooperation and make this technology available to a larger community of researchers and clinicians worldwide. This paper summarizes the history, current status, motivation, and challenges of pursuing MRI at higher magnetic field strengths, focusing on the perspective in Germany.
MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Ali Caglar Oezen, Maximilian Frederik Russe, Thomas Lottner, Simon Reiss, Sebastian Littin, Maxim Zaitsev, Michael Bock
Summary: This study evaluates the RF-induced heating of commonly used intravascular devices in a low-field MRI system (0.55 T) at the Larmor frequency. The results show that liver catheterizations have the lowest RF heating, and modifying the transmit body coil design can further reduce the temperature increase.
MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE
(2023)
Review
Dentistry, Oral Surgery & Medicine
Tabea Fluegge, Christian Gross, Ute Ludwig, Johanna Schmitz, Susanne Nahles, Max Heiland, Katja Nelson
Summary: MRI is increasingly used in various dental specialities, such as orthodontics, endodontics, prosthodontics, periodontics, oral surgery, pediatric dentistry, and operative dentistry. It is used for cephalometry, detection of dental pulp inflammation, characterization of periodontal pathologies, caries detection, and dental implant planning, among others.
DENTOMAXILLOFACIAL RADIOLOGY
(2023)
Article
Urology & Nephrology
Robert Wriedt, Mehmet Yilmaz, Thomas Lottner, Andreas Reichert, Konrad Wilhelm, Philippe-Fabian Pohlmann, Christian Gratzke, Michael Bock, Arkadiusz Miernik
Summary: In this study, we evaluated critical temperature areas in the kidney parenchyma using magnetic resonance thermometry in an ex vivo Holmium:YAG laser lithotripsy model. The results showed that high laser power and longer application times, low irrigation rate, and anatomical volume of the targeted calyx were closely associated with critical temperature areas in the kidney parenchyma.
WORLD JOURNAL OF UROLOGY
(2023)
Article
Gastroenterology & Hepatology
Rahul Unni, Nadia Andrea Andreani, Marie Vallier, Silke S. Heinzmann, Jan Taubenheim, Martina A. Guggeis, Florian Tran, Olga Vogler, Sven Kuenzel, Jan-Bernd Hoevener, Philip Rosenstiel, Christoph Kaleta, Astrid Dempfle, Daniel Unterweger, John F. Baines
Summary: Inflammatory bowel disease (IBD) is a chronic inflammatory condition that poses challenges for treatment. This study investigates the evolutionary changes of gut bacteria in IBD and finds disease-specific genetic and phenotypic changes associated with clinical relevance, including sensitivity to antibiotics.