An Investigation into the Variability of Breast Tangent Setups Using the Portal Imaging Process.

This study set out to examine the imaging schedule for a specific group of patients, that is, those receiving the two-field tangent technique for breast cancer treatment at our centre. This group makes up a large percentage of our workload. The departmental policy on imaging for breast tangent patients at the time the study was conducted stated that one image be taken on either the medial or lateral tangent field on the first day of treatment.