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• Low-energy LDR sources (seeds)

125

I and

103

Pd most common with

131

Cs gaining interest

– about 4.5 mm long and 0.8 mm diameter copsules

– treatments either temporary or permanent

0.4 < D

Rx

< 2 Gy/h

• High-energy LDR sources (increasingly rarely)

137

Cs tubes and

192

Ir ribbons or wire

– treatments mainly temporary (

137

Cs or

192

Ir), or permanent (

192

Ir)

Current LDR Brachytherapy Sources