EasyManuals Logo

GE Revolution CT User Manual

GE Revolution CT
702 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #449 background imageLoading...
Page #449 background image
3.2 ROI
The Region of Interest (ROI) tools exist in 2D and 3D. Several shapes are available to measure
a region of interest in any view plane/volume: circle, elliptic, rectangle, and cubic for 3D ROIs.
You can use the ROI tools to obtain information, volumes, areas and statistics of anatomy or
pathology. The ROI tools allow you to:
measure the pixel intensity value at a specific point on the image
display the area or volume
display the mean, standard deviation and minimum and maximum pixel values within the
ROI
In order to perform measurements on an image that can be expressed in absolute values (mm),
the image must be calibrated, i.e. the relationship between image pixels and true anatomical
distance in the patient’s body (the scale factor) must be known. For images such as CT and MR
this information is automatically recorded during image acquisition and stored with the image.
Measurements on such images can therefore be expressed directly in mm, using the patient-
based Right Anterior Superior (RAS) coordinate system.
3.3 Modify active (red) annotation
All active (red) annotations on the image indicate adjustable fields. Red Numerical values can
also be adjusted with left/right-click to decrease/increase values. Other red annotations can be
modified selecting options from a menu. The selections vary based on the application launched
and the selected view.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
Chapter 16 Reformat 449

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the GE Revolution CT and is the answer not in the manual?

GE Revolution CT Specifications

General IconGeneral
Detector CoverageUp to 160 mm
Gantry Tilt± 30 degrees
Spatial ResolutionUp to 0.23 mm
Scan RangeUp to 200 cm
X-ray Tube CurrentUp to 800 mA
TypeComputed Tomography (CT) Scanner
Rotation Speed0.28 seconds per rotation
Tube Voltage80 kV to 140 kV
Number of Detector Rows256
Power Requirements480 VAC, 3-phase
Detector Rows256
Coverage160mm

Related product manuals