26.1
Planar implants
26.2
Prostate brachytherapy
26.3
Chapter 4 presents a method for calculating dose from a single brachytherapy source; however, clinically, single sources are rarely used. Rather, sources are most often implanted in arrays. In this section, we will consider 2D planar implants, which illustrate physical principles that apply to many brachytherapy treatments.