Draws the CTR tool using the provided context on the specified item.
draw(
item: ImageViewerItem,
context: CanvasRenderingContext2D,
rect: LeadRectD
): void;
item
The item where the CTR tool is drawn.
context
The drawing context that is used to draw the CTR tool.
rect
The rectangle boundaries of the CTR tool in normalized coordinates that is used to convert its position into a physical position.
CTR tool is the cardiothoracic ratio which expressed as the ratio of the transverse diameter of the heart to the maximum internal diameter of the thoracic cavity.
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