Question about my thyroid?

My tsh was 94, I just did the first part of the nuclear scan today and I finish it tomorrow. My question is this: my doctor told my that my thyroid is basically not working, yet the technician who did the scan says he got really good pictures of the thyroid and if it were not working they would barely get a picture. So what does this mean? I have a multi nodular goiter (reason for the scan). So is it working and there is something else wrong….? Has anyone else gone through this same thing?