TGETrainingSessionUCSDCenterforFunctionalMagneticTGE训练UCSD的中心功能性磁PPT课件

1、Introduction Safety Magnetic Room Equipment Console Room Overview Desktop Keyboard Scan Rx Desktop Selecting a Protocol Graphical Prescription fMRI Study Data Management Reset the TPS第1页/共27页Safety Eliminate Magnet Hazards Keep metal out of the magnet room Subject Preparation Screening Provide infor

2、mation Test intercom Enter the correct subject weight Turn on the bore light and fan Show the subject how to turn on the patient alert system Provide ear protection for the subject Instruct subject to close his or her eyes when the alignment light is on. Bore Temperature第2页/共27页EXCITE Platform EXCIT

3、E: Ultra-fast, scalable, data acquisition and reconstruction hardware. Scalable from low end to ultra-high end (rBW and channels). Rapid, parallel processing Reconstruction: 100-400 frames/sec. Architectural support for up to 1600 frames/sec. Hardware: HP x 8000 Workstation Dual 2.66 GHz/533 MHz Bus

4、 Intel Xeon CPUs 108 GB Disk Host Operating System: Red Hat Linux 7.3第3页/共27页Magnetic Room Equipment 3T magnet labels: fmri3tw (host computer), fmri3tww (Advantage workstation). The 3T magnet is equipped with: Physiological Acquisition Controller (PAC) Respiratory compensation bellows A six pin conn

5、ection for a high impedance ECG leads Peripheral gating: a fiber optic connection for the peripheral gating lead Patient call to signal assistance Pulse meter MRI Devices 8 channel high resolution brain coil (HRBRAIN) 1 channel birdcage volume head coil Two actively shielded gradient coils: Zoom: Op

6、timizes slew rate and amplitude for small FOV applications. Max. FOV: 35 cm (S/I), 44 cm (A/P), 44 cm (R/L) Whole Body: Intended for large FOV applications第4页/共27页Status Display Panel: located on the magnet cover第5页/共27页Control Panel ButtonAlignment light on the magnet control panel buttonMove to Sc

7、an: the table moves to patient isocenterControl Panel Button in the magnet room第6页/共27页1.Desktop control panel2.System status display3.Area title4.Text box5.Pull down menu6.Autoview window7.Image slider8.System activity status9.Window toggle button10.Pop-up window button11.List/Select menu12.Scroll

8、arrows13.Control panels14.Scan operation area第7页/共27页Patient Information/Position Panel Accession Number: Typically prescribed by hospital Patient ID: Any combination of numbers, letters and dashes. Limited to 64 characters. System will notify if identical ID is found. Patient Name: Limited to 64 ch

9、aracters and should not be preceded by numbers. Rad: Name of radiologist can be used to specify PI. Refer: Name of referring physician also available for PI specification. Operator: Any combination of 3 characters. Patient Position: Typical setting: Supine, Head First, HRBRAINAbbreviated Patient Inf

10、ormationFull Info第8页/共27页Keyboard1.Emergency stop2.Operator microphone3.Patient speaker4.Microphone volume adjust5.Press to talk6.Start Scan7.Pause Scan8.Stop Scan9.Move to Scan10.Stop Move Scan11.Host Computer Control12.Functional Keys13.Keyboard第9页/共27页Selecting a ProtocolOther: Protocols belongin

11、g to each group is placedSite: Standard Protocols placed by the Center. Including:BIRNfMRIfRMI-AllProtocols selected from any of the protocol libraries (Site, GE) can be modified and saved in the Site (other) Library.Also available is the Protocol Lockout that restricts site protocols by requiring p

12、assword.第10页/共27页The Rx Manager The Rx manager is used to create, view, edit, and prepare series for scanning. The Rx manager list shows the prescribed series state and series description: New: series is not prescribed or saved and cannot be scanned INRX: (in prescription) series is opened, not yet

13、saved, and cannot be scanned. RXD: (prescribed) series is saved and can be scanned ACT: (active) series is ready for scan and can no longer be edited SCND: (scanned) series has been scanned and can no longer be edited but can be re-scanned. PSCD: (pre-scanned) series is pre-scanned and ready for sca

14、n. 第11页/共27页Graphical Prescription3D graphic object3 plane graphic prescription2D graphic object第12页/共27页fMRI Study 3-Plane localizer Functional scan (s) High resolution structural scanAdded scans could include High-order Shim 3D Arterial TOF Phase map 2D Venous TOF第13页/共27页Prescanning Automatic Pre

15、scan: Automatically adjusts the center frequency and the transmit and receiver gain. Manual Prescan: Allows manual adjustment of prescan parameters. Caution: You are delivering RF to the patient during prescan.Manual Prescan windowSelect AutoPrescan or Manual Prescan第14页/共27页Shimming Autoshim: Impro

16、ves image quality by optimizing the X, Y, Z gradient settings. It is the systems default and is included in the prescan. High Order Shims: Allow shimming over a ROI, and likely to improve local field inhomogeneity. If you enable the Autoshim option after running a High Order Shim seris, you will rec

17、eive a message informing you that scanning with this series resets ALL the shim coils, i.e. all shim channels will be reset to zero.ROI Selection Window1. Select a ROI to run shim value2. Calculations with current ROI3. Compare calculated and predicted RMS4. If difference is significant, press Done,

18、 otherwise Quit.Caution: After High Order Phase Correction, make sure the Phase CorrectionOption is ON, and only the AutoShim option is turned OFF. 第15页/共27页3-Plane Localizer The 3-Plane localizer acquires three planes in a single acquisition, eliminating the need for three separate scans. It then d

19、isplays the 3-planes in graphic Rx to prescribe off of.第16页/共27页fMRI Imaging Options Imaging Options: A list of imaging options from the Imaging Parameter area. Availability depends on pulse sequence and system configuration. GRE EPI Imaging Options Include: ASSET, Cardiac Gating/Triggering, fMRI, I

20、R prepared, sequential, multi-phase, etc.第17页/共27页fMRI with BrainWave RTBrainWave Real-Time software features:Overlay of segmented image with functional image set.1.Acquire a high resolution structural scan2.Acquire fMRI data with BrainWave RT3.Perform segmentation4.Visualize fMRI data with BrainWav

21、e PA第18页/共27页User Control VariableDefault setting: Ramp Sampling = 1, Spin-Echo Reference Scan = 0To change the receiver bandwidth (rBW), set at 250 kHZ, the ramp sampling first be must be turned off. This will allow the user to make changes to rBW. Acquisition of echoes during the rise and fall tim

22、es of the gradient slope.Use Spin Echo EPI to generate phase correction coefficients.第19页/共27页fMRI Control WindowThe fMRI Control Window is the default window that launches after Prep Scan button is clicked. It is used to prepare, start, stop the fMRI acquisition. Statistical Threshold SliderAllows

23、selection of matched structural scanStarts the fMRI acquisitionTakes an image capture of allor one the images in the RT.Caution: You must Close the fMRI Control window before proceeding. Failure to do so will prevent you from scanning the next Rx.第20页/共27页Paradigm ManagerTotal reps0 means initial st

24、ate is rest,1 means initial stat is stimulusrest reps and stimulus reps per cycleCan add and delete an entry but cannot modify anexisting paradigm.Specify a paradigm name第21页/共27页Paradigm Development Clicking the fMRI Screen icon opens the fMRI additional parameter window which has available a numbe

25、r of standard fMRI paradigms (including the ones you have previously created) and sequence parameters. Research mode: When the research agreements have been signed, this step will no longer be required. One can generate fMRI paradigms during the series prescription.Interleaved/SequentialSelect Parad

26、igmInternal/External第22页/共27页Image ManagementScan reconstruction statusFeature Status Area (located below the Desktop Control Panel):Filming statusArchive statusNetwork statusManaging Disk Space:Center Recommendations: It is recommended for the disk occupancy not to exceed 50%. We hope that each gro

27、up removes their data within a one week period of the scanning session. If you have started an exam and notice that the disk occupancy is high, you may remove data starting from the least recent, and not to exceed a one week window.Caution: There is no protection for data belonging to other group. %

28、 disk is full第23页/共27页Networking-Image TransferTransfers data by exam.Transfers data by series.Data can be transferred to a number of locations such as the Advantage Window. See the instructions for data transfer to the fmriserver for transfering data to the server.第24页/共27页TPS Reset / System Shutdown The TPS is a