Klains, nonograms are an online predictive tool...not a medical test. You can plug in your husband's numbers (PSA, Gleason score) and it will give you statistical information about your husband's disease. There are a few nonograms you can use...Memorial Sloan Kettering's website has one. I do caution you though that these nonograms are based on statistical averages and do not take into account individual situations.
A bone scan with a PSA of 4.4 is useless. Bone scans are used when the PSA is at 20 or higher, and even then they're not definitive. Our urologist did not do a bone scan when my husband was first diagnosed but he did order a CT scan, which showed nothing.
Color doppler is getting more and more attention but I'm not sure if it is a stand-alone test or is done during the biopsy. Others will chime in on this one.
If you and your husband are meeting with an oncologist tomorrow, I imagine that he or she will walk you through any further testing before treatment. Sounds like you are both leaning towards surgery. If that is the case, your husband will have the standard pre-op tests which might include a chest xray, blood work, general physical (to check blood pressure, etc.). This is done so that the surgeon knows about any pre-existing conditions that he/she may have to take into account (again, such as high blood pressure or breathing problems).
Hope to hear from you tomorrow after you've met with the oncologist. Just out of curiosity, is there a reason why you're seeing an oncologist at this stage?