CT SCAN : Different Variations of CT Technique.

       Conventional CT @ Dynamic Incremental Scanning:

• Directing an X-ray beam at several different angles and levels of the abdomen

• Contrast dye, given to the patient orally and/or intravenously, helps to make the organ visible by appearing white on the X-ray films

• A computer processes the X-ray information

• Produces the CT images, usually as 1/2-inch cross-sectional slices of the abdomen

        Dual Phase CT:

• Accounts for the different optimal scanning times for the pancreas and the liver. It is       essentially two conventional CT scans synchronized with the optimal time for the dye. 

        Spiral CT @ Helical:

• Most recently developed and accurate method. 

• During the spiral CT the X-ray beam remains on continuously and rotates around the patient as the patient is moved through

• More efficient technique that reduces the scanning time of the entire abdomen from          approximately two minutes using the conventional CT to 20-30 seconds using the spiral

• The resulting images are three-dimensional rather than the two-dimensional images          created with conventional techniques.