| 摘要 |
<p>A method for correlating accuracy of computer tomography (CT) image resolution is described. Small radio-opaque markers having a diameter less than one slice width of a CT scan are embedded in the object, such as a bony skeletal member, to be measured; the object is then CT scanned so that the radio-opaque markers appear in at least two slices of the scan. The markers are also physically located by detecting them with a sensor, such as a positioning pointer. Also described is one form of marker comprising a tantalum sphere (5) mounted in a ceramic, preferably alumina, pin (1).</p> |
