Table 1. Comparison of the proposed SFDI probe with previously reported examples.

SFDI system	Wavelengths	Compact (Y/N)	Cost
Initial projector-based system [3–5,8]	Single (increased by additional filters)	N	Low to Medium
Systems utilizing co-aligned LEDs [1,9]	4	N	Medium
SFDI head with custom-made fibers [10]	6	N	High
DLP-based SFDI systems [13,14]	3	Y	Medium
The proposed prototype in this report	9	Y	Low