How do you interpret nodes with minimal increased uptake on PSMA PET in prostate cancer?  

In the recently published SPARC grading scale for PSMA PET, equivocal nodes on PSMA PET classified as

- Low uptake (Equal to or lower than blood pool) in a site typical for prostate cancer or intermediate to high uptake (Equal to or lower than parotid gland and higher than liver, or higher than parotid) in a site atypical for prostate cancer

At our facility, IR usually is not able to biopsy these nodes when they're small. 

Do you use a similar grading scale? Do you attempt to biopsy nodes typically? 

What SUV parameters do you use to decide if treatment is warranted for node positive disease?