Co-pays for certain medically needed tests were criticized by some senators in Hartford Thursday. Several state senators say the amount patients are required to pay for imaging tests such as MRIs is too high. The state insurance commissioner issued a rule change two years ago that allowed insurance companies to make patients pay for 50 percent of the cost for an MRI. Senate Democrats say the rule was passed without following the proper procedure, plus it's unreasonable for patients who need multiple MRIs. Two bills to revise the co-pays are pending. One places a yearly cap on the amount of out-of-pocket co-pays and the other includes a yearly and per-visit limit on co-pays. The senators are hoping an agreement can be reached and the legislation will not be necessary.