When the Draw Shape Annotation tool is selected the following options are displayed
Draw a line – draws free hand shapes
Draw an arrow – draws an arrows
Draw an ellipse – draws ellipses (ovals, circles)
Draw a rectangle – draws rectangles
Draw Line, Arrow, ellipse, rectangle
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Draw a line – draws free hand shapes
- Select the tool
- Move mouse to the starting position
- Click and hold the left mouse button down
- With left mouse button down draw shape using mouse
- When finished release left mouse button
- Repeat steps 1b to 1e if further lines are required
- When finished de-select the tool
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Draw an arrow – draws an arrow
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Select the tool
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Move mouse to where the arrowhead is to be located
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Click and hold the left mouse button down
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With left mouse button down draw the arrow using mouse
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When finished release left mouse button
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Repeat steps 2b to 2e if further arrows are required
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When finished de-select the tool
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Draw an Ellipse - draws ellipses (ovals, circles)
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Select the tool
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Move mouse to the starting point of the shape
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Click and hold the left mouse button down
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With left mouse button down draw the required shape
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When finished release left mouse button
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Area is the area of the shape – this uses the images resolution, so accuracy is dependent on the accuracy of the resolution
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Mean is mean or average Hounsfield Units for the area
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Std Dev. is Standard Deviation of the Hounsfield Units for the area
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See https://radiopaedia.org/articles/hounsfield-unit for Hounsfield Unit information
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Repeat steps 3b. to 3e. if further ellipses are required
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When finished de-select the tool
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Draw a rectangle - Used to draw rectangular shapes
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Select the tool
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Move mouse to the starting point of the shape
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Click and hold the left mouse button down
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With left mouse button down draw the required shape
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When finished release left mouse button
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Area: the area of the shape – this uses the images resolution, so accuracy is dependent on the accuracy of the resolution
- Mean is mean or average Hounsfield Units for the area
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Std Dev. is Standard Deviation of the Hounsfield Units for the area
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See https://radiopaedia.org/articles/hounsfield-unit for Hounsfield Unit information
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Repeat steps 4b to 4e if further rectangles are required
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When finished de-select the tool
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