Bianchi underwent surgery after it was found he was suffering from Morton's neuroma, a benign tumour of the intermetatarsal plantar nerve.
Bologna, who were relegated from Serie A this season, confirmed details of the striker's operation in a statement on Thursday.
"Rolando Bianchi has undergone surgery for removal of Morton's neuroma," it read.
"The player will now observe a few days of convalescence, and then gradually start the rehabilitation phase."
The 31-year-old moved to the Stadio Renato Dall'Ara at the start of the season, but struggled to recreate the form he had showed for Torino in previous campaigns.
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