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GE Signa HDxt 1.5T (16x) EchoSpeed 16-Channel Mobile MR system
The Signa HDxt 1.5T EchoSpeed 16 Channel system is a high-performance, whole-body MR system that includes the CXK4 compact, actively-shielded magnet, Detachable patient table system, Actively-shielded, high-fidelity EchoSpeed gradients, 8-channel Hi-Definition data pipeline and XVre volume recon engine, HDxt workstation and user interface, HDxt ScanTools and HDxt ContinuumPak, Advanced Applications suites
CXK4 Magnet: The uniquely engineered Signa CXK4 magnet, manufactured in Florence, SC, is built for years of service and upgradeability, protecting you from obsolescence. High performance homogeneity and stability are a result of the 18-coil superconducting shim that allows you to shim for the environment, the patient and the exam with ease and flexibility."Zero boil-off" technology reduces the need for service, and lowers operating costs.
Table System: The table system features a fully detachable patient table with automated vertical and longitudinal power drives for easy patient positioning and maximum patient safety. The table can be easily docked and undocked by a single operator. The table includes a self-storing, non-ferrous IV pole, table pad and positioning pads, safety rails and security straps.
EchoSpeed Gradient Platform: The EchoSpeed gradient platform provides 33 mT/m amplitude and 120 mT/m/ms slew rate performance on each axis with high-fidelity drivers to deliver the accuracy, reproducibility and power needed to ensure top quality results across all applications. The gradients are non resonant and shielded to minimize eddy currents and improve image quality. The gradient and body coil are integrated into a single, water-cooled unit to maximize performance, and this configuration includes a quadrature transmit/receive RF head coil.
Hi-Definition Data Pipeline and XVRE Reconstruction: The Hi-Definition data pipeline employs 16 independent data channels linked to 16 analog-to-digital converters and a dual-density single blade Volume Reconstruction Engine. Designed to address the challenge of data intensive applications, the XVRE reconstruction engine provides 2700 2D FFTs per second with full FOV, 256x256 matrix.
HDxt Workstation and User Interface the HDxt workstation uses dual AMD Opteron 250 (2.4 GHz) processors with the Linux operating system. The workstation includes a wide-screen, high-definition LCD monitor with high resolution and contrast ratio. The computer components are housed in a single tower configuration, and the scan control keyboard is ergonomically designed with an intercom speaker, microphone, volume controls and emergency stop switch. This configuration also includes a modem or broadband connection that links the system to GEHC InSite Service Engineers enabling remote diagnostics and optimum system performance.
The HDxt User Interface enhances productivity through single-screen prescription for most protocols and includes Secure Coil Connect that eliminates coil connection errors, ProtoCopy, that facilitates the development and rapid transfer of scan protocols, and Vector Gating for highly reliable ECG triggering.
HDxt ScanTools, ContinuumPak and Applications Suites: The HDxt delivers a complete portfolio of clinical applications optimized for whole-body MR imaging - basic to advanced.
HDxt ScanTools provide the core pulse sequences and analysis tools to enable a broad range of clinical imaging capability.
2D Spin Echo and 2D/3D Fast Spin Echo are versatile imaging sequences that use RF-refocusing. FSE sequences speed scanning and optimize imaging in 2D and 3D modes with increased slice coverage and minimal edge blurring. Inversion recover\d techniques enable rapid fluid suppressed T1 FLAIR and T2 FLAIR imaging with enhanced gray and white matter contrast.
2D/3D Gradient Echo and 2D/3D Fast Gradient Echo use short TR/TE, variable flip angles and gradient refocusing to reduce scan time in 2D and 3D imaging modes. GRE sequences encompass multiple techniques to enable the optimization of contrast, fluid sensitive imaging, fat/water in-phase and out-of-phase imaging, and fat suppression.
Time-of-Flight is family of GRE/SPGR sequences optimized to exploit flow related enhancement in 2D, 3D and gated imaging modes.
Phase Contrast is a family of GRE sequences optimized to exploit flow related enhancement in 2D, 3D and Cine imaging modes. PC also uses velocity encoding pulses to capture signal from flowing blood or CSF for velocity and directional flow information.
Echo Planar enables ultra-fast imaging using SE or GRE sequences. EPI sequences Encompass multiple techniques that enable optimized imaging in 2D and 3D modes as well as single-shot and multi-shot modes and Inversion recover\d techniques.
FuncTool enables advanced processing for a broad range of MR applications. The suite of algorithms includes ADC and eADC mapping for diffusion imaging and correlation coefficients for functional brain imaging. For contrast enhanced imaging, the suite provides negative and positive enhancement integrals, signal enhancement ratio, maximum slope increase, maximum difference function and difference function.
Multi-planar Volume Reformat enables the manipulation of 3D volumetric MR data sets. The reformat tool generates alternative viewing planes and volume thickness allowing the user to scan one but get multiple views.
Interactive Vascular Imaging enables the removal of the background from MRA images. The IVI tool is embedded in MPVR and enables the generation of maximum or minimum intensity projections in multiple viewing planes to enhance MRA imaging.
ClariView uses an adaptive filter Algorithm to reduce noise and sharpen edges. The filter tool enables different levels of noise reduction and edge sharpening to enhance image display.
The HDxt ContinuumPak provides new features and platform enhancements that affect workflow, ASSET reconstruction and applications capability.
Workflow and ASSET Enhancements, Auto-Voice allows the user to adjust playback speed to accurately match scan intervals. Auto-Transfer allows the user to specify select series for transfer and eliminate the transfer of non-essential series. HIS/RIS automatically updates patient information with Access or Patient ID. Graphic Prescription enables copy shim volumes, save localizer images, and reverse slice prescription with a single click. Auto-Contrast Inherit copies the contrast designation to all subsequence series in a prescription. ASSET has been optimized to reduce reconstruction time for applications that use ASSET parallel imaging acceleration.
3D Dual Echo enables high-resolution, volumetric in-phase and out-of-phase liver imaging in a single breath hold. The 3D volumetric data set can be reformatted into multiple planes and the single breath hold ensures perfect slice registration across the two contrasts.
BrainSTAT post-processing automatically Generates parametric maps for Neuro Blood Flow, Blood Volume, Mean Transit Time, and Time to Peak signal intensity. A Gamma Variant fitting algorithm is used to automatically estimate the arterial input function and then calculate the values for the four parametric maps. The maps may be saved in DICOM format and fused with high-resolution anatomic datasets for improved visualization of tissue and anatomy.
The HDxt Advanced Applications Suites include the Advanced Neuro Suite, Advanced Body & MSK Suite, and Advanced Vascular & Cardiac Suite. These specialized Clinical applications suites are powered by The GE signature applications PROPELLER, LAVA, and TRICKS designed to make exams easier to perform.
The Advanced Neuro Suite applications are designed to deliver motion insensitive imaging, accelerated imaging, enhanced high-resolution imaging, and/or enhanced image contrast properties.
PROPELLER uses an alternative data acquisition technique with a low sensitivity to motion artifacts and high contrast-to-noise properties. T2 FSE and T2 FLAIR PROPELLER generate motion insensitive scans without a time penalty while providing substantial increases in CNR. DWI PROPELLER reduces the susceptibility artifacts that challenge traditional EPI-based DWI.
EchoPlus enables diffusion-weighted imaging. EchoPlus uses motion sensing gradient pulses in three directions to generate isotropic diffusion-weighted images in conjunction with T2 FLAIR images. B value selection ranges from 0 to 7000 s/mm2 providing the flexibility to balance diffusion sensitivity and background suppression. EchoPlus is compatible with ASSET and images are processed in FuncTool.
Diffusion Tensor expands the motion sensing capability of diffusion imaging up to 150 directions to create contrast based on the degree of diffusion anisotropy in cerebral tissues such as white matter. On the operator console FuncTool DTI provides algorithms to generate Fractional Anisotropy FA maps and Volume Ratio Anisotropy VRA maps.
FiberTrak expands the capability of FuncTool DTI to enable the generation of 2D color orientation maps, 2D eigenvector maps, and 3D tractography maps using Diffusion Tensor image data. This version loads on the operator console.
3D BRAVO is a 3D GRE sequence that uses an IR-prep pulse and parallel acceleration to deliver T1W isotropic, whole-brain coverage.
3D FIESTA and 3D FIESTA-C are 3D sequences with high fluid sensitivity that enable high resolution of small intracranial structures and joints.
ASSET is an acceleration technique that uses the geometry of multi-element coils to speed image data collection. As a result, the user may choose to reduce scan time, increase in-plane resolution, or increase slice coverage. ASSET benefits Neuro imaging by enhancing spatial resolution, reducing scan time and reducing susceptibility artifact on diffusion imaging.
HDxt Advanced Body & MSK Suite applications are designed to deliver accelerated imaging, enhanced high resolution imaging, and/or enhanced image contrast properties. Overall this suite provides a broad range of tools that enable snapshot, breath-held, respiratory gated and respiratory compensated body and organ system imaging.
3D LAVA is designed for multi-phase whole-liver imaging and combines 3D SPGR and ASSET (up to 3X) to deliver reduced scan time and extended coverage without compromising in-plane resolution. LAVA also uses an optimized inversion pulse and a view ordering technique that yields enhanced image contrast and robust, uniform fat suppression.
3D LAVA-XV with ARC combines LAVA with ARC acceleration to extend coverage and/or the resolution performance of LAVA multi-phase imaging. ARC uses a data-driven acceleration technique to enhance image quality.
DynaPlan enables the easy set-up and optimization of multi-phase organ exams, and includes the ability to link Auto-Voice instructions with the protocol.
3D eMRCP is an FSE technique optimized for rapid T2W imaging of the biliary tree. 3D eMRCP uses an optimized echo train, partial filling and optional burst mode to enable rapid high-resolution in either breath-hold or gated modes.
2D FS FIESTA combines 2D steady state imaging with fat saturation for fluid-sensitive, fat-suppressed body imaging with ultra-short acquisition times.
2D MERGE is designed to image the C spine. MERGE acquires and sums multiple gradient-echoes at various echo-times to deliver optimized gray white matter contrast within the cervical cord.
3D COSMIC is designed to image the C spine. COSMIC uses a unique "pre" steady-state imaging technique to deliver optimized visualization of soft tissue structures adjacent to bony structures such as the nerve roots or intervertebral discs.
Cartigram is a non-invasive T2 mapping package that provides high-resolution maps of the T2 values in cartilage and other tissues. The imaging results are color coded to highlight those structures with increased water-content yielding elevated T2 values.
ASSET is an acceleration technique that uses the geometry of multi-element coils to speed image data collection. As a result, the user may choose to reduce scan time, increase in-plane resolution, or
increase slice coverage. ASSET benefits body imaging by enhancing spatial resolution and reducing scan times.
HDxt Vascular and Cardiac Suite applications are designed to deliver accelerated imaging, enhanced high-resolution imaging, and/or enhanced image contrast properties. Overall this suite provides a broad range of MRA timing tools and enables cardiac and coronary morphology and functional assessment.
3D TRICKS utilizes a hybrid acceleration technique to deliver high temporal resolution without sacrificing spatial resolution and without the need for timing for vascular time course imaging. As a result, TRICKS delivers optimized arterial, venous and equilibrium phases even in circumstances where there may be delayed flow or different flow patterns. In addition, TRICKS provides the choice of subtracted, un-subtracted or both types of reconstruction from a single image set.
FTMRA (Fluoro-Trigger MRA) enables real-time monitoring and manual triggering for vascular time-course imaging. FTMRA allows the user to view real time images of the area of interest and then manually trigger data acquisition at the optimum time. The switch over takes less than one second.
SmartPrep and SmartStep enable automated bolus detection and automated bolus chasing for time-course vascular imaging. SmartPrep uses a special tracking pulse to monitor MR signal intensity changes. Data acquisition is automatically triggered when the threshold signal intensity is reached. SmartStep adds automated table stepping for multi-station exams that integrates scout series, graphic prescription, prescan, bolus detection, table motion and coil switching. The SmartPrep suite is compatible with elliptic-centric encoding and ZIP reconstruction for optimum image quality.
2D FIESTA is a steady-state technique that yields high contrast between the blood and myocardium even in the presence of turbulent flow. 2D FIESTA is designed for multi-slice, multi-phase functional cardiac imaging.
Double-Triple IR-FSE combines inversion recovery suppression and chemical fat saturation for black-blood and morphological cardiac imaging. The IR pulse is optimized to suppress blood flow artifact and can be used alone or in conjunction with chemical fat saturation to reduce competing signal from fatty tissues surrounding the heart and coronary arteries.
3D FS FIESTA combines volumetric acquisition and fat saturation for high resolution, high-contrast coronary artery imaging with ultra-short breath-hold times. 3D FS FIESTA can also be used in conjunction with a 3D Navigator pulse to may eliminate the need for breath holding.
iDrivePro and iDrivePro Plus provide real-time interactive MR imaging that makes it easier to optimize and streamline scan prescription. The iDrive tool uses the 2D FGRE/FSPGR sequence and allows the user to change on-the-fl\:) geometric and image contrast scan parameters. Results can be evaluated immediately and bookmarked or saved. Scan locations can also be easily exported to pre-programmed protocols. IDrivePro Plus enables accelerated frame rates needed for cardiac imaging.
ASSET is an acceleration technique that uses the geometry of multi-element coils to speed image data collection. As a result, the user may choose to reduce scan time, increase in-plane resolution, or
increase slice coverage. ASSET benefits body imaging by enhancing spatial resolution and reducing scan times.
The HDxt ConnectPro Package is designed to significantly improve productivity, reduce manual transcript errors, and synchronize scan options. ConnectPro enables the 3.0 DICOM worklist server class for the MR system that makes it possible to query a DICOM compatible HIS/RIS by name, modality, or schedule date and download patient demographics directly to scanner. The ConnectPro package also includes Performed Procedure Step that automatically notifies the HIS/RIS and PACS systems of procedure status. Separate gateway hardware may be required to connect non-DICOM compatible HIS/RIS systems.
Cube with T2, T2 FLAIR, and PD: Cube is a 3D isotropic imaging technique with sub-millimeter spatial resolution and excellent contrast to help visualize even diminutive lesions. Cube can replace several slice-by slice, plane-after-plane 2D FSE acquisitions with one single 3D scan. You can easily reformat sub-millimeter isotropic volume data into any plane, without gaps and with the same resolution as the original plane. Cube is enabled for T2, T2 FLAIR or PD contrasts. Our new self-calibrating parallel imaging engine ARC helps eliminate artifacts while accelerating image acquisition.
PROBE PRESS Single-Voxel Spectroscopy: PROBE PRESS enables single-voxel proton brain spectroscopy using the PRESS pulse sequence. PROBE PRESS acquires and displays volume localized, water suppressed 1H spectra in a single-voxel mode for the non-invasive assessment of invivo metabolites. Graphic prescription of the spectroscopic volume and automated reconstruction make this tool easy to use.
PROBE 2D CSI: PROBE 2D CSI expands proton brain spectroscopy capability enabling simultaneous acquisition of multiple in-plane voxels. PROBE 2D CSI uses the PRESS pulse sequence to acquire and display volume-localized, water suppressed 1H spectra in a multi-voxel mode for the non-invasive assessment of invivo metabolites. Metabolite maps are automatically generated in FuncTool on the operator console.
Inhance 2.0 Suite with 3D Velocity, 2D Inflow, Inflow IR, and 3D Deltaflow: The Inhance Suite of applications consists of several sequences designed to provide high-resolution images of the vasculature with short-acquisition times and excellent vessel detail. These sequences include:
Inhance Inflow IR is a non-contrast-enhanced MR angiography technique that has been developed to image arteries with ability to suppress static background tissue and venous flow. This sequence is based on 3D FIESTA, which improves SNR, as well as produce bright blood images. Selective inversion pulses are applied over the region of interest to invert arterial, venous, and static tissue. At the null point of the background tissue, an excitation pulse is applied to generate signal. The net result is an angiographic image with excellent background suppression and free of venous contamination. Uniform fat
suppression is achieved using a spectrally selective chemical saturation (SPECIAL) technique while respiratory gating compatibility reduces respiratory motion artifacts during free-breathing renal exams.
Inhance 3D Velocity is designed to acquire angiographic images in brain and renal arteries with excellent background suppression in a short scan time. By combining a volumetric 3D phase contrast acquisition with parallel imaging, efficient k-space sampling, and pulse sequence optimization, Inhance 3D Velocity is capable of obtaining the whole neurovascular anatomy in approximately 5-6 minutes. Furthermore, background suppression is improved by the optimized pulse sequence design, resulting in better visualization of small branches. Respiratory triggering is also compatible with Inhance 3D Velocity to enable abdominal angiography, specifically renal arteries. The results are excellent productivity and image quality.
Inhance 3D Deltaflow is a 3D non-contrast enhanced MRA application for peripheral arterial imaging. It is based on cardiac gated 3D fast spin echo and acquires two echoes, one in diastole and the other in systole. Slow arterial flow during diastole results in bright arteries in the diastole images while faster arterial flow during systole results in dark arteries in the systole images. A subtraction of the systole images from diastole images provides arterial-only images with excellent suppression of venous and background signal. Interleaved acquisition and parallel imaging (ASSET) with optimized k-space trajectory helps reduce motion misregistration and improve vessel visualization, respectively. In addition, with the use of partial-Fourier and coronal plane acquisition, the scan time is considerably reduced.
The Inhance 2D Inflow pulse sequence is designed to acquire angiographic images of arteries that follow almost a straight path (i.e. femoral, popliteal. and carotid arteries). Arterial blood flow is faster during the systolic phase and is slower during the diastolic phase. Therefore, Inhance 2D Inflow is designed to acquire data during the systolic phase. It features an optimized spatial saturation gap to improve fat suppression and background suppression. Peripheral Gating is deployed to minimize the pulsatile artifacts Inhance 2D Inflow is compatible with ASSET acceleration to reduce scan time.
LAVA Flex: LAVA Flex is a 3D FSPGR imaging technique that acquires water only, fat only, in phase and out of phase echoes in one single acquisition that is typically completed in one 2D sec. breath hold. This innovative technique provides excellent homogeneous fat suppression over the entire field of view, including areas that are difficult to image using conventional fat suppression due to magnetic susceptibility effect. As all 4 contrasts are acquired in the same scan, they are perfectly co-registered. The water only contrast differs from a conventional fat suppressed image in that an inversion prep pulse is not applied for fat suppression. In fact, the fat information is removed leaving a water only image that may potentially be used in place of a LAVA type image. LAVA Flex uses ARC, an innovative 2D self-calibrated parallel imaging technique that allows for acceleration in both phase and slice directions for supported coils.
eDWI - Enhanced Diffusion Weighted Imaging : The enhanced Diffusion Weighted Imaging technique has been designed to provide high signal-to-noise-ratio diffusion images of the liver and brain with short-acquisition time. Its multi-B feature is designed to provide measurement of apparent diffusion coefficient (ADC) map with reduced effect of perfusion. In addition, "3 in 1" technique applies diffusion weighting to all three gradients simultaneously, helping improve sensitivity. Built in tetrahedral feature applies four different diffusion weighing combinations of x, y, and z gradients simultaneously to acquire isotropic diffusion weighted images with high signal to noise ratio and shorter TE. Its smart NEX feature significantly reduces the acquisition time. For 1.5T, inversion recovery has been deployed to provide robust fat suppression. Enhanced DWI package includes the acquisition sequence and post-processing tools.
Coils:
1.5T 16-Channel Head/Neck/Spine Array-GE Coils : The 1.5T Head/Neck/Spine (HNS) Array delivers convenience without compromise. Compatible with new 16-Channel HDx MR systems, this 29-element coil serves as a high-resolution brain coil. high-density neuro-vascular array, and a multi-element spine coil in one convenient package. Designed to accommodate multi-dimensional parallel imaging in any scan plane, this coil yields unprecedented imaging speed and superior image quality, thanks in large part to a unique element arrangement that focuses the signal over the anatomy of interest.
1.5T 12-Channel Body Array - GE Coils: The 12-Channel quadrature Body Array with a single connector is designed for high-definition MR imaging of the chest, abdomen and pelvis on the new 16-channel 1.5T MR system. This 12-element phased-array coil provides extensive coverage, enabling multi-station anatomical and vascular imaging of the chest-abdomen or abdomen-pelvis without repositioning the coil. The array is optimized for use with ASSET acceleration in enhanced breath-hold imaging procedures The 12-ch Body Array is not compatible with E8801RG-lnterface Device, E8801R-Endorectal Prostate Probe, E8801RC-Endorectal Cervix Probe, or E8801RD-Endorectal Colon Probe.
1.5T 3-Channel Shoulder Array - GE Coils: The 1.5T 3-channel Shoulder Array offers the increased signal-to-noise characteristic of phased-array technology, along with a unique sleeve design that delivers exceptional joint-imaging capabilities. The coil provides clear definition of the shoulder joint, specifically the head of the humerus, clavicle, acromion, supraspinatus muscle and ligaments. Patient comfort pads and restraining straps are included.
1.5T 8-Channel Wrist Array – Invivo : The 8-Channel Wrist Array generates high definition MR wrist images. The one-piece, ovoid hinged design is optimal for small-FOV imaging and provides 12-cm S/I coverage. The coil can be positioned overhead or at the patient's side, vertically or horizontally. The coil is optimized for ASSET imaging to improve acquisition times.
1.5T 8-Channel Knee Array – Invivo: The 1.5T T/R Knee Array is designed for high definition MR imaging of the knee. This array uses unique hybrid technology using separate birdcage coils for transmit and receive functions. Designed uniquely for GE, the 8-element receive coil delivers 30% to 100% more SNR than the standard extremity coil. The array is compatible with PURE for uniform signal intensity and ASSET for accelerated imaging speed.
1.5T Quad Extremity Coil – Invivo: The transmit/receive design of the Quad Extremity Coil helps ensure optimal results in studies of the knee, ankle and foot. Its unique anterior extension increases the imaging volume for thorough evaluations in dorsi-flexed foot and ankle studies, covering FOVs up to 30 cm for the foot and ankle, and up to 2D cm for the knee.
1.5T Dual Array Package with Adapter : The Dual Array Package includes two 3-inch General Purpose Coils, two General Purpose Flex Coils, one Dual Array Adapter, one Medrad TMJ Positioning Device, and one Eye and Ear Surface Coil Holder.
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