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Vue PACS MR Perfusion User Guide

Unrestricted Internal Use

AE9362 C

Uncontrolled unless otherwise indicated

Page: 29 of 43

Vue PACS MR Perfusion User Guide - AE9362.docx

•

k2 map—Shows a measure which is proportional to the rate of contrast material permeability
across the capillaries' blood-brain barrier to the extravascular extracellular space (EES).
Calculation of the map values is based on the Boxerman-Weisskoff model

. (Calculated k2

values are taken into consideration in the calculation of all other perfusion maps. You can
choose to exclude k2 calculations from all perfusion calculations (see Section

The color bar at the bottom of each map displays the minimum and maximum data values for that
specific map. Two sliders represent the current windowing and allow you to change the range of
displayed values.

The windowing menu, displayed by right-clicking the windowing annotation, allows you to apply
various color maps and change the windowing scale to minimum and maximum values.

Changing windowing values allows you to display values that are beyond the values of the color bar.
In such cases, the value displayed on the color bar is marked with an asterisk.

You can determine whether the color bar is displayed or not. Right-click the windowing annotation and
click

Show Color Bar

to display the bar. If the bar is displayed, click

Show Color Bar

to remove the

bar from the display.

NOTE: The appearance of the color bar is configurable. Appearance settings include vertical vs.
horizontal appearance, bar size, bar position, the size of the gradient columns, the display of the
minimum and maximum data values, and the display of the sliders. For configuring the color bar
appearance, see your system administrator.

Perfusion Tables

In addition to the perfusion color maps, the calculated values of the perfusion parameters are
presented in two tables:

•

Ischemic region table—Presents the parameter values in the ischemic areas. The table
presents values only if a damaged side is selected (either automatically by the software or
manually by the user). If the damaged side is not selected automatically, a message is
displayed notifying you that no damaged side was detected.

•

ROI table—Presents the parameter values in any ROI you draw. The table is empty until you
draw an ROI.

1

Weisskoff, R. M., Boxerman, J. L., & al., e. (1994). Simultaneous blood volume and permeability

mapping using a single Gd-based contrast injection.

Proceedings of the Society of Magnetic

Resonance in Medicine

, (p. 279). San Francisco

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Содержание Vue PACS MR Diffusion

Страница 1: ...restricted Internal Use AE9362 C Uncontrolled unless otherwise indicated Page 1 of 43 Vue PACS MR Perfusion User Guide AE9362 docx Clinical Collaboration Platform Vue PACS MR Diffusion and MR Perfusio...

Страница 2: ...3 Erasing Brain Mask 21 6 4 Adding an ROI 21 6 5 Determining the Display 21 7 Perfusion Series 22 7 1 Initial Layout 22 7 2 Calculating Perfusion Input Values 25 7 2 1 Identifying the AIF and VOF 25...

Страница 3: ...lied with respect to this information Carestream Health Inc shall not be liable for any loss or damage including consequential or special damages resulting from the use of this information even if los...

Страница 4: ...ream Health Inc field service office Hazard Warnings CAUTION To prevent serious personal injury and damage to the system strictly follow the instructions provided in these hazard warnings Always remai...

Страница 5: ...grates review dictation and reporting tools to create a productive work environment for the radiologists and physicians The system contains a Perfusion module with interactive tools to analyze and com...

Страница 6: ...FN Contrast Frame Number CORBA Common Object Request Broker Architecture COTS Commercial Off the Shelf Software CS Carestream CSH Carestream Health cSVD Circular Singular Value Decomposition CVA Cereb...

Страница 7: ...rformed Procedure Step MR Magnetic Resonance MRI Magnetic Resonance Imaging MTT Mean Transit Time NAS Network Attached Storage NFS Network File System OI Oscillating Index OS Operating System oSVD Osc...

Страница 8: ...ice Access SSL Secure Sockets Layer sSVD Standard Singular Value Decomposition SUV Standard Uptake Value SVD Singular Value Decomposition TCP IP Transmission Control Protocol Internet Protocol TID Tim...

Страница 9: ...n produces maps that help diagnose the clinical question at hand The diffusion module provides 1 Automatic calculation of a brain mask Ability to add or subtract mask areas manually Automatic calculat...

Страница 10: ...orking with Perfusion Maps Ability to add ROIs Automatic selection of the affected hemisphere of the brain Segmentation of two ischemic regions marked as Lesion and Hypoperfusion The segmentation of e...

Страница 11: ...rfusion calculations the results of which are displayed in a set of maps Measurements of parameters for specific Regions of Interest ROIs are presented in tables Finally a segmentation of the Lesion a...

Страница 12: ...ht click menu Load To Perfusion Stroke The Perfusion Stroke application is the main Perfusion application which calculates the Core Penumbra and compares the two brain sides This application is applic...

Страница 13: ...ted Page 13 of 43 Vue PACS MR Perfusion User Guide AE9362 docx Load To Perfusion Lesion applicable for any study containing Diffusion groups The Diffusion application is intended for any study that co...

Страница 14: ...ep Click to progress to the next step 2 Select Step Select the next step Steps include display of perfusion input data and display of perfusion maps 3 Calculate Perfusion Maps Click to initiate the ca...

Страница 15: ...nd graphs performed by the user 14 Show Hide Brain Mask Show hide brain mask You can also add brain mask manually as well as erase added brain mask coloring 15 Show Hide AIF Segmentation Show hide aut...

Страница 16: ...lows you to apply various maps and change the windowing scale to minimum and maximum values Use the windowing menu to display values that are beyond the values of the bar In such cases the value displ...

Страница 17: ...DC Reverses the colors of the ADC map Because the contrast in the ADC map is the reverse of regular T2 images the system generates the eADC map based on the formula exp b ADC b being a configurable co...

Страница 18: ...Vue PACS MR Perfusion User Guide Unrestricted Internal Use AE9362 C Uncontrolled unless otherwise indicated Page 18 of 43 Vue PACS MR Perfusion User Guide AE9362 docx...

Страница 19: ...hows more maps than the single monitor display The following illustrations show the dual monitor layout on landscape and portrait monitors To change the maps that are displayed by default right click...

Страница 20: ...g of the main direction of diffusivity V1 relative to the main axes X Y Z Red indicates the main direction X green indicates the main direction Y and blue indicates the main direction Z At each point...

Страница 21: ...be manually added in all orientations 6 4 Adding an ROI You can add an ROI on any of the maps to further investigate the diffusion parameters in specific areas To draw an ROI 1 Click Add ROI The curso...

Страница 22: ...t data is displayed first and then you continue to map calculation 7 1 Initial Layout The initial layout includes The calculated TMIN images The original series data The AIF and VOF graph displaying s...

Страница 23: ...Vue PACS MR Perfusion User Guide Unrestricted Internal Use AE9362 C Uncontrolled unless otherwise indicated Page 23 of 43 Vue PACS MR Perfusion User Guide AE9362 docx...

Страница 24: ...d by default right click the map name and change the display see Section 5 5 Determining the display By default the graph shows the AIF and VOF curves representing the average values of all found arte...

Страница 25: ...2 2 Adding Arteries and Veins When the Vessel Signal setting is set to Seeds See Input State Settings in Section 8 Using Settings you can decide to manually add arteries and veins in order to investig...

Страница 26: ...displays average values 7 2 3 2 Adding Artery and Vein Segmentations 1 Click Add AIF Segmentation or Add VOF Segmentation in the Show Hide AIF Segmentation and Show Hide VOF Segmentation drop down men...

Страница 27: ...Mask To erase added brain mask marking 1 Click Erase Brain Mask in the drop down menu of the Show Hide Brain Mask icon 2 Click the left mouse button at the point where you wish to start erasing brain...

Страница 28: ...the calculated values The following is displayed A Set of Perfusion Maps In each of the displayed maps a color range represents the calculated values of the perfusion parameters 2 rCBV map Presents th...

Страница 29: ...bar is marked with an asterisk You can determine whether the color bar is displayed or not Right click the windowing annotation and click Show Color Bar to display the bar If the bar is displayed clic...

Страница 30: ...the entire ischemic region Volume The volume in cc of the tissue TMIN Series The screen displays the same TMIN series that was displayed in the initial layout with the addition of a color based segme...

Страница 31: ...n Toggle in the Perfusion ribbon if you want the application to duplicate the ROI you draw on the contralateral side NOTE You can break the symmetry later by right clicking one of the ROIs and clickin...

Страница 32: ...All Calculations to discard all ROIs tissues maps and AIF and VOF corrections and revert to the initial stage at the time of loading 7 4 Displaying a Fused Image You can display a fused layout where t...

Страница 33: ...e Layout ribbon lists perfusion specific layouts For the input display the menu lists by default a single layout The layout is adjusted to landscape monitors and to portrait monitors For the map displ...

Страница 34: ...e no leakage has occurred When Leakage is set to Uncorrected the k2 map is not displayed and all other map calculations take no leakage into account Advanced Leakage Correction When Leakage is set to...

Страница 35: ...ange for TTP maps Acceptance Criteria When enabled only values within the set range are used in the ROI statistics and the segmentation of the ischemic region TMAX Parameters Set TMAX parameters Defau...

Страница 36: ...s signal to Seeds to show the AIF and VOF candidates and to manually add AIF and VOF points on the image Preprocessing Settings Split data by slice time or slice number Use Slice Time to arrange the...

Страница 37: ...value are removed Remove small volume regions Regions with a volume smaller than the set value are discarded Use the slider to change the values The changes are shown immediately on the maps Morpholog...

Страница 38: ...ute The criterion is applied to the actual value Relative The criterion is applied to the relative value of the damaged side divided by the opposite side Difference The criterion is applied to the val...

Страница 39: ...tables and graph NOTE Only the average curves are included in the report graph Click Preview Report to display a version of the report that contains the patient details including patient name report d...

Страница 40: ...n Analysis Click Export in the Perfusion ribbon to export the calculated maps and TMIN images including the ischemic regions segmentation the center line indication and the added ROIs The maps are exp...

Страница 41: ...ith acceptable values may indicate noise or artifact in the images Temporal resolution Preferably the temporal resolution should not be lower than the resolution of one image per 4 seconds In general...

Страница 42: ...rnal of Biomedical Imaging 2011 20 3 Gobbel G Fike J 1994 A deconvolution method for evaluating indicator dilution curves Physics in Medicine and Biology 39 1833 1854 4 Liao P S Chen T S Chung P C 200...

Страница 43: ...nternal Use AE9362 C Uncontrolled unless otherwise indicated Page 43 of 43 Vue PACS MR Perfusion User Guide AE9362 docx 150 Verona Street Rochester NY USA 14608 Carestream Health 2017 CARESTREAM is a...

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