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7.3 Working with Perfusion Maps
7.3.1 Initiating Map Calculation
When all the required data is available, the application is ready to perform the perfusion calculations
and yield the perfusion maps and table data.
To initiate the perfusion calculations, do one of the following:
•
Click Select Step in the Perfusion ribbon and then click the Display Maps option in the
drop-down menu.
•
Click Next Step
•
Click Calculate Perfusion Maps
7.3.2 Analyzing Perfusion Calculation Results
The system calculates all the blood perfusion parameters and displays a set of maps and tables
summarizing 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
2
parameters
.
•
rCBV map—Presents the volume of blood in a known volume of tissue, based on the
concentration of contrast material present in the tissue over time. The map shows the
calculated volume of blood in each voxel throughout the scan in relative units.
•
rCBF map—Presents the flow of blood to the affected tissue. The map shows the calculated
rate of blood flow in each voxel throughout the scan in relative units.
•
MTT map—Presents the period of time during which the contrast material stays in the tissue.
The map shows the mean time of blood transit through each voxel (in seconds).
•
TTP map—Presents time to maximum tissue enhancement at each volume of the tissue. The
map shows the number of seconds from the scan start to the peak of tissue enhancement in
each voxel.
•
TMAX map—Shows the residue function time to peak in seconds.
Vue PACS MR Perfusion User Guide
AE9362 C
Vue PACS MR Perfusion User Guide - AE9362.docx
in the Perfusion ribbon.
in the Perfusion ribbon.
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