From: Wide local excision of breast carcinomas: the effect of ultrasound and wire guidance on the Surgical Precision Index
Technique
Number
Mean SPI
Median
Range
Palpable
44
1.91
1.67
0–8.08
Ultrasound
35
1.20
1.06
0–3.77
Wire
18
1.21
0.61
0–6.76