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RSNA Technology Report 2015 Magnetic Resonance Imaging


first_img Videos | Artificial Intelligence | July 03, 2019 VIDEO: Artificial Intelligence May Assist in Pediatric Imaging Sudhen Desai, M.D., FSIR, read more Arthur Agatston explains the history of CT calcium scoring Video Player is loading.Play VideoPlayMuteCurrent Time 0:00/Duration 9:54Loaded: 1.67%Stream Type LIVESeek to live, currently playing liveLIVERemaining Time -9:54 Playback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedCaptionscaptions settings, opens captions settings dialogcaptions off, selectedAudio Trackdefault, selectedFullscreenThis is a modal window.Beginning of dialog window. 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Video Player is loading.Cynthia McCollough discusses bridging diversity gaps in medical physicsPlay VideoPlayMuteCurrent Time 0:00/Duration 6:05Loaded: 2.67%Stream Type LIVESeek to live, currently playing liveLIVERemaining Time -6:05 Playback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedCaptionscaptions settings, opens captions settings dialogcaptions off, selectedAudio Trackdefault, selectedFullscreenThis is a modal window.Beginning of dialog window. Escape will cancel and close the window.TextColorWhiteBlackRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentBackgroundColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentTransparentWindowColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyTransparentSemi-TransparentOpaqueFont Size50%75%100%125%150%175%200%300%400%Text Edge StyleNoneRaisedDepressedUniformDropshadowFont FamilyProportional Sans-SerifMonospace Sans-SerifProportional SerifMonospace SerifCasualScriptSmall CapsReset restore all settings to the default valuesDoneClose Modal DialogEnd of dialog window.Close Modal DialogThis is a modal window. This modal can be closed by pressing the Escape key or activating the close button. The top piece of content in July was a video interview explaining how Princess Margaret Cancer Center is using machine learning to create automated treatment plans. This was a hot topic at the American Association of Physicists in Medicine (AAPM) 2019 meeting in July.  Siemens’ simultaneous Multi-Slice (SMS) acquires multiple diffusion tensor imaging (DTI) slices simultaneously. Siemens’ simultaneous Multi-Slice (SMS) acquires multiple diffusion tensor imaging (DTI) slices simultaneously.Introduced in the 1980s, magnetic resonance imaging (MRI) has become an integral part of any radiology department. The modality has most often been used for brain and spine scans, but new applications are expanding its capabilities in recent years. Vendors are also working to reduce both scan times and machine size for enhanced productivity. In an itnTV feature video (http://bit.ly/1O9pyDt), ITN Contributing Editor Greg Freiherr examines these and other cutting-edge MRI innovations he saw on the show floor at the 2015 Radiological Society of North America (RSNA) annual meeting, Nov. 29-Dec. 3 in Chicago. Lung MR The lungs have long been a difficult region to capture on MRI, because “certain tissues in the human body provide very little MR signal,” Suresh Narayan, senior manager, MR market development for Toshiba America Medical Systems, told Freiherr in the itnTV video. Toshiba presented a solution at this year’s RSNA, introducing an ultra-short echo time (UTE) sequence specifically for lung MR through the M-Power 3R5 platform. The technology acquires the images in four to five minutes, and the pathology is similar to that of a traditional lung computed tomography (CT) scan. Achieving these results without radiation or contrast makes it a viable alternative to CT scans. Cardiac MRThe heart is the other major organ that has traditionally been difficult to image with MRI, and it could not capture certain information that other modalities can — blood flow, cardiac function and so on. GE Healthcare, in conjunction with Arterys, introduced a solution at RSNA 2015.“We believe ViosWorks can break this barrier and bring cardiovascular applications into the mainstream clinical routine,” Ioannis Panagiotelis, chief marketing officer, MR, for GE Healthcare told itnTV. Traditionally, getting a complete 3-D MRI scan of the heart would require a specialized technologist to do multiple 2-D acquisitions across several patient breath-holds; this could make the exam take an hour or more. With ViosWorks, the complete scan is accomplished in one free-breathing slab acquisition at high isotropic resolution, reducing the scan time to under 10 minutes. GE refers to ViosWorks as 7-D MRI, as it reveals seven dimensions of information (three in space, one in time and three in velocity direction), generating an enormous 20 GB of data. A supercomputer would be required to process that much data in real time, according to Panagiotelis, but thanks to Arterys, all of the ViosWorks data is processed and stored in a HIPAA-compliant cloud in real time for increased capacity. This also provides access to the images from anywhere, including on smartphones and tablets. Enhanced Brain MRWhile new applications may be drawing a lot of attention, vendors are still rolling out enhancements related to brain scans as well. Siemens debuted two new applications at RSNA 2015 that can reduce brain scan times while enhancing image quality. SMS (Simultaneous Multi-Slice) acquires multiple diffusion tensor imaging (DTI) slices simultaneously, an application that is particularly useful for surgical planning, according to Jan Chudzik, head of global product marketing, MR, for Siemens. “This is a paradigm shift because typically in the past we were acquiring those slices sequentially,” said Chudzik in the itnTV video. The largest benefit is that this reduces scan time significantly, a bonus for DTI patients and others who may have difficulty keeping still during the exam, including pediatrics. “This will have much greater potential even in the future because that can also be applied to other body regions,” Chudzik told Freiherr. The other new application, GOBrain, performs clinically validated, comprehensive brain examinations in five minutes with the push of a button. This helps expedite exams in addition to reducing the need for sedation. Chudzik told itnTV that both solutions are still pending U.S. Food and Drug Administration (FDA) approval. Image EnhancementRather than focusing on particular applications, some RSNA vendors chose to focus on overall image enhancement for their MRI systems. Philips, in collaboration with Dixon Technologies, debuted the mDixon scan sequence for itnTV, which helps simplify and accelerate complicated scans such as the liver. “mDixon addresses one of the key challenges in MR imaging, which is fat saturation,” Martijn Hartjes, head of MR strategy for Philips, told Freiherr in the itnTV video. “You want to see certain anatomies, and that’s why you want to get rid of the fat.” Hartjes said this is typically done with sequences like SPIR (spectral presaturation with inversion recovery) and STIR (short-TI inversion recovery), “but what you sometimes see is that fat sat fails,” meaning the fat is not completely suppressed from the image. These types of scans can also take longer, Hartjes told itnTV. mDixon resolves both of these issues, offering complete fat suppression while actually reducing the scan time from four minutes to three minutes. Hitachi introduced more than 40 different new image enhancement benefits with the release of the Evolution 5 software platform at RSNA. Some of the highlights include: Diffusion imaging: Evolution 5 now offers diffusion kurtosis imaging (DKI), which improves fractional and isotropy mapping, and improves white matter contrast for more advanced neurological scans. DKI visualizes regions with strong diffusion restriction as high signal intensity, detecting minute histological changes. Selective saturation: Improvements in this area let users focus on hemodynamics and isolate blood flow. “We’ve applied this historically in our time-of-flight studies and now can apply this in the abdomen in MRA (magnetic resonance angiography) capabilities,” said Shawn Warthman, MR marketing director for Hitachi in the itnTV video. Motion compensation: Hitachi has expanded its RADAR suite for motion compensation into RADAR TOF (time-of-flight), which it calls an industry-first motion compensation MRA, and RADAR GE (gradient echo) with T2* contrast for bleeds.Spectroscopy: The new platform adds breast spectroscopy capabilities to the existing neuro function, allowing users to monitor choline levels and look at elevated peaks, a key indicator of whether a tumor is benign or malignant. “And in conjunction with therapy and treatment, you can look at the response to that choline peak,” Warthman told itnTV. Liver imaging: Evolution 5 offers two new enhancements related to liver imaging. k-RAPID uses a k-space-based parallel imaging technique, and T2* RelaxMap allows visual iron quantification through color mapping, “which helps stage that disease and determine where we are in terms of an overall treatment plan,” Warthman told Freiherr.ASL Perfusion: This new capability provides a non-contrast based method for performing perfusion scans in MRICardiac MRI: Evolution 5 adds Retrospective Gating, which records more data throughout the cardiac cycle, and myocardial tagging, which distinguishes myocardium displacement versus deformation; andImage processing: A new algorithm reduces noise while enhancing edge sharpness, and several new optimized sequences are included. MRI-conditional Implant ScansIncreasingly patients are being treated with various implantable medical devices, including cardiac devices, large joint replacements and spinal implants. According to Philips, data from the Millennium Research Group indicates that 12.5 million people in the United States had implants in 2015, and that number is expected to grow 71 percent by 2020, reaching to 21.6 million people. While these devices may be beneficial and even crucial to the patient’s care, they can present problems for radiologists. “Today in radiology departments it’s actually very difficult to scan these patients,” Hartjes told itnTV. “You have to adapt a lot of parameters and in some cases these patients actually get turned away from an MR exam.” More and more of these devices are becoming MR-conditional, which permits MRI scanning within certain parameters. At RSNA 2015, Philips introduced the ScanWise protocol specifically for performing MR-conditional device scans. The user interface guides operators to set up the MRI system by inputting the MR-conditional values of the device in question, which only needs to be done the first time. All scan parameters are automatically adjusted based on the values entered. Hartjes told itnTV that ScanWise was FDA 510(k) pending as of RSNA 2015. Weight-bearing MRI ExamsIn the early days of MRI, there was more demand for low-field open scanners built around permanent magnets, but today those models have largely been eclipsed by high-field superconducting scanners. The open scanner is still alive and well, however, as Esaote demonstrated with its G-Scan Brio at RSNA 2015. The G-Scan Brio can tilt to put patients into a weight-bearing position up to a full 90 degrees, an application seeing increasing interest, Esaote’s Glenn Davis, USA sales vice president, told itnTV. This is because “some clinical pathologies, particularly in the MSK [musculoskeletal] environment, are not really apparent in the supine position,” he said. “I think that what we’re seeing is a renewed interest in it particularly because it offers this ability to look at biomechanics in a functional position.”The body coil is placed on the patient in the supine position, and then positioning adjustments are made directly on the scanner. A full exam can be completed in six to eight minutes. As MRI strives for the potential imagined long ago, it builds on success rooted in caring about the patient. New applications are coming from ways that get more from the signals that exist, and new ways to use existing technologies in and outside the traditional bounds of MR.  Related MRI Content:VIDEO: MRI Technology Report at RSNA 2015Recent Advances in MRI TechnologySoftware Advances in MRI TechnologyAdvances in Cardiac Imaging at RSNA 2016Recent Trends and Developments in Contrast MediaComparison Chart: MRI Wide Bore Systems (chart access will require a login, but is free and only takes a minute to register)Comparison Chart: MRI Contrast Agents(chart access will require a login, but is free and only takes a minute to register)Comparison Chart: Cardiovascular MRI Analysis Software(chart access will require a login, but is free and only takes a minute to register) FacebookTwitterLinkedInPrint分享 The ScanWise user interface from Philips guides operators to set up the MRI system by inputting the MR-conditional values of the device in question, which only needs to be done the first time. Philips’ mDIXON TSE can be used for multiple types of acquisitions. This is a comparison of standard T2 TSE and T2 mDIXON in-phase images. The image contrast and quality of the T2 TSE and the T2 mDIXON in-phase image are basically indistinguishable. A 3-D printed model (left) and a model constructed in augmented reality (right), both of a kidney with a tumor. In both models, the kidney is clear; the tumor is visible in purple on the AR model and in white on the 3-D printed model. Photo courtesy of Nicole Wake, Ph.D. Videos | AAPM | July 23, 2019 VIDEO: Bridging Diversity in Medical Physics to Improve Patient Care Cynthia McColl… read more News | Radiology Imaging | July 22, 2019 AHRA and Canon Medical Systems Support the 12th Annual Putting Patients First Program For the past twelve years, Canon Medical Systems USA, Inc. has partnered with read more Related Content The open scanner is still alive and well, as Esaote demonstrated with its G-Scan Brio. Feature | Radiology Imaging | July 29, 2019 | By Greg Freiherr Imaging Market in U.S. Could Rise In Coming Years The coming years may be good for the medical imaging community in the United States. But they will not be easy. read more Videos | Computed Tomography (CT) | July 30, 2019 VIDEO: New Advances in CT Imaging Technology Cynthia McColl… read more Videos | Cardiac Imaging | July 30, 2019 VIDEO: The History of CT Calcium Scoring Arthur Agatston, M.D., clinical pro read more center_img Philips’ mDIXON TSE can be used for multiple types of acquisitions. This is a comparison of standard T2 TSE and T2 mDIXON in-phase images. The image contrast and quality of the T2 TSE and the T2 mDIXON in-phase image are basically indistinguishable. The ScanWise user interface from Philips guides operators to set up the MRI system by inputting the MR-conditional values of the device in question, which only needs to be done the first time. Feature | Digital Radiography (DR) | July 19, 2019 | By Greg Freiherr DR Advances Promote Imaging of Whole Spine Recent advances in… read more Advances in long-length digital radiography are creating opportunities for visualization during spinal surgery, as well as pre- and post-operatively. Image courtesy of Fujifilm Medical Systems Feature | Radiology Business | July 23, 2019 | Greg Freiherr Liars in Radiology Beware! Can you tell when someone is lying? read more Demand for ultrasound scans at U.S. outpatient centers could grow by double digits over the next five years, according to a speaker at AHRA 2019. A variety of factors, however, could cause projections for this and other modalities to change. Graphic courtesy of Pixabay GE ViosWorks combines 3-D cardiac anatomy, function and flow in one free-breathing, approximately8 minute scan. Video Player is loading.Sudhen Desai explains how deep learning might assist pediatric imagingPlay VideoPlayMuteCurrent Time 0:00/Duration 8:21Loaded: 1.95%Stream Type LIVESeek to live, currently playing liveLIVERemaining Time -8:21 Playback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedCaptionscaptions settings, opens captions settings dialogcaptions off, selectedAudio Trackdefault, selectedFullscreenThis is a modal window.Beginning of dialog window. Escape will cancel and close the window.TextColorWhiteBlackRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentBackgroundColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentTransparentWindowColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyTransparentSemi-TransparentOpaqueFont Size50%75%100%125%150%175%200%300%400%Text Edge StyleNoneRaisedDepressedUniformDropshadowFont FamilyProportional Sans-SerifMonospace Sans-SerifProportional SerifMonospace SerifCasualScriptSmall CapsReset restore all settings to the default valuesDoneClose Modal DialogEnd of dialog window.Close Modal DialogThis is a modal window. This modal can be closed by pressing the Escape key or activating the close button. GE ViosWorks combines 3-D cardiac anatomy, function and flow in one free-breathing, approximately8 minute scan. Body language expert Traci Brown spoke at the AHRA 2019 meeting on how to identify when a person is not being honest by their body language. She said medical imaging department administrators can use this knowledge to help in hiring decisions and managing staff.  Feature | Magnetic Resonance Imaging (MRI) | April 05, 2016 | Jeff Zagoudis RSNA Technology Report 2015: Magnetic Resonance Imaging In an itnTV video, Contributing Editor Greg Freiherr offers an overview of MRI advances at RSNA 2015 1234PreviousNext Feature | August 05, 2019 | Dave Fornell, Editor Most Popular Radiology and Radiotherapy Topics in July 2019 August 5, 2019 — Here is the list of the most popular content on the Imaging Technology New (ITN) magazine website fr read more Video Player is loading.Cynthia McCollough explains new advances in CT technologyPlay VideoPlayMuteCurrent Time 0:00/Duration 13:56Loaded: 1.17%Stream Type LIVESeek to live, currently playing liveLIVERemaining Time -13:56 Playback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedCaptionscaptions settings, opens captions settings dialogcaptions off, selectedAudio Trackdefault, selectedFullscreenThis is a modal window.Beginning of dialog window. Escape will cancel and close the window.TextColorWhiteBlackRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentBackgroundColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentTransparentWindowColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyTransparentSemi-TransparentOpaqueFont Size50%75%100%125%150%175%200%300%400%Text Edge StyleNoneRaisedDepressedUniformDropshadowFont FamilyProportional Sans-SerifMonospace Sans-SerifProportional SerifMonospace SerifCasualScriptSmall CapsReset restore all settings to the default valuesDoneClose Modal DialogEnd of dialog window.Close Modal DialogThis is a modal window. This modal can be closed by pressing the Escape key or activating the close button. Feature | Advanced Visualization | July 02, 2019 | By Jeff Zagoudis Augmented Reality Versus 3-D Printing for Radiology Three-dimensional (3-D) printing and… read morelast_img