Application Workflow - Carestream Vue PACS MR Diffusion User Manual

3. Application Workflow

An MR study may include diffusion series, perfusion series, or both diffusion and perfusion series.
For the diffusion series, the following steps are performed:
1. Automatic calculation of the brain mask—Executed automatically by the application while
allowing manual corrections by the user.
2. Displaying of the original image data and calculated maps—executed automatically by the
application.
For DWI series—ADC and eADC maps + the original data
For DTI series—ADC, eADC, DWI, Ax diff, Rad diff, FA, VR, and FA dir maps + the original
data
NOTE: The specific maps that appear are configurable. Contact your system administrator to
specify which maps will be displayed.
3. Calculation of diffusion parameters for ROIs drawn manually by the operator. These
measurements are displayed in a table.
For the perfusion series, the application segments the arteries and veins in order to calculate AIF and
VOF signals, identifies the brain centerline, and marks the results on a standard Temporal Minimum
Intensity Projection (TMIN) series.
Based on this data, the user can initiate the perfusion 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 and Hypoperfusion areas is marked on the TMIN image.
A typical workflow includes the following automatic and manual steps:
1. Loading of the study to the MR Perfusion application—executed by the user.
2. AIF Indication—Executed automatically by the application while allowing manual corrections
by the user.
3. VOF Indication—Executed automatically by the application while allowing manual corrections
by the user.
4. Identification of the brain center line—Executed automatically by the application while
allowing manual corrections by the user (calculated and shown already for the diffusion
series).
5. Automatic calculation of a brain mask (calculated and shown already for the diffusion series).
6. Automatic calculation of a TMIN series.
7. Motion correction.
8. Calculation of the perfusion parameters—rCBV, rCBF, TTP, MTT, TMAX and k2.
The parameters are calculated automatically by the application and displayed as a set of
perfusion maps.
9. Measurement of the above parameters for ROIs drawn manually by the operator. These
measurements are displayed in a table.
10. Segmentation of two ischemic regions marked as Lesion and Hypoperfusion. The
segmentation of each region is based on thresholds and parameters configurable by the user
8 Using
(see Section
Vue PACS MR Perfusion User Guide
AE9362 C
Vue PACS MR Perfusion User Guide - AE9362.docx
Settings).
Uncontrolled unless otherwise indicated
Unrestricted Internal Use
Page: 11 of 43