First, congratulaions to John Tostevin for finishing a project every good trauma technologist has dreamed about as long as I can remember.

Some years back I submitted to an American textbook a "biplanar angulation method" to allow accurately the use of vertical column swivel in achieving the desired 15 and 45 degree angles on a supine patient. Depicted correctly in its first appearance -- and incorrectly in all subsequent editions -- the approach calls for the following steps:

1. Set cassette holder in place
2. Swivel the vertical column so that the tube is perpendicular to the patient and facing cephalad.
3. Swivel the tube itself not 45, but 53 degrees medially.
4. Backswivel the vertical column axis by not 15, but 23 degrees.
5. Preserving these compensating angles, whose net angles are in fact 45 and 15 degrees respectively, direct central ray to cassette at 72" (1.8M) SID.
6. Center the patient.
7. Use a good lateral nongrid technique.

1  out of 1 found this valuable. Do you find this valuable? Do you?    

Excelent to study

 out of  found this valuable. Do you find this valuable?