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imagedicomimage-scannermedical

how to draw the scan range in the gantry tilt cases?

The scan/recon range rectangles on the Topo/Scout image show the scan/recon ranges for next scans/recons. The width of the rectangle represents the FOV and the height represents the scan/recon length. FOV here will be scan FOV for scan range or recon FOV for recon range.

In the case of gantry tilt, the rectangles are replaced with parallelograms. I am wondering what is FOV and what is scan/recon length then?

Is the FOV still showed as the width of the parallelograms? or the length of the top/bottom line is the FOV now?

Is the height of the parallelograms still the scan/recon length?

how to determine the parallelograms will slope to right or left?

enter image description here

Solution

  • I would suggest the best method to approach this is to use David Clunie's localizer line method for your top and bottom slice (section 2.2.1 of http://www.dclunie.com/medical-image-faq/html/part2.html).

    Once you have the top and bottom line, just connect the ends to each other to complete your parallelogram.