GE Senographe 2000 D Operator's Manual page 103

GE Healthcare
REV 1
Segment
D Click the (Segment) button to place on the image a line segment that you can
use to measure the distance between two points.
The squares at each end of the segment are called handles.
D Press and drag on either of the handles to move the corresponding end of the segment to the
desired position. The size and angle of the segment follow the movement of the handles.
D To move the whole segment, select the segment by clicking on any point along the line (except the
handles) and drag the segment to the desired position.
The length of the segment (in millimeters) and the angle between the segment and the vertical (in
degrees) are displayed in the bottom right corner of the image.
Ellipse
D Click the (Ellipse) button to place on the image an ellipse, that you can use to
highlight an area of interest, or to measure the area delimited by the ellipse.
The ellipse is displayed with four handles around it, four tick marks on the ellipse
itself, and a cross mark in the center.
D To change the size and shape of the ellipse, press and drag on the handles.
D To rotate the ellipse around its center, press and drag on any of the tick marks.
D To move the actual ellipse, press anywhere on the ellipse (except for the tick marks), or on the
center cross, and drag the ellipse to its desired position.
The area of the ellipse (in square millimeters), and the mean and standard deviation of the pixel
values within the ellipse, are displayed in the bottom right corner of the image.
All measurement calculations for graphical annotations (length, surface area,
CAUTION
etc.) are made in a reference plane which is 2 cm above the breast contact
surface. These values therefore do not correspond to the true size of a
pathological feature unless it is situated in the reference plane.
The gray levels of pixels in raw images follow a linear law; those in
processed images follow a logarithmic law.
Senographe 2000 D Acquisition System
101
OM 5179217–1–100