Intersectbed Overlap

Hi,

I've a question about intersectBed. Is it possible to extract only alignment like this :

chromosome ===============================================================
BED/BAM A               ==============              =================
BED FILE B               ============
RESULT                  ==============

But no alignment like this (even if the read overlapp 100% of the feature, I don't want to extract these reads)

chromosome ===============================================================
BED/BAM A    =========================              =================
BED FILE B               =============
RESULT

So, only extracting reads that have 90-95% of its sequence overlapping 90-95% of the feature.

Is it clear ?

Thanks,

N.