Evaluating for Multiple Sclerosis

[WeakandFoggy]

I am 64, have worsening MS-like symptoms, went back to an MS doctor I previously had seen years ago and he ordered an MRI of the brain on a 3 Tesla magnet machine but without contrast (because at 64 contrast could pose a risk to my kidneys).  I have a normal creatinine and BUN.  He said if he sees any new lesions, when compared with the MRI from years ago, then at that time he will re-order the MRI with contrast.   Wouldn't Mucomyst protect my kidneys if the MRI were done with contrast the first time???  Will an MRI without contrast  on a 3 Tesla be able to show any new large lesions?

[kwarendorf]

No worries DV. Believe it or not a heft part of my job is technical writing :-)

Kyle

[doublevision1]

Kyle's response was way more clear and concise than mine.  As usual I used too many words to explain something pretty straightforward!

[kwarendorf]

I agree with DV. If you do not have a previous MRI for comparison, contrast is the only way to tell if some lesions are newer than others, this meeting the dissemination in time criteria.

Since you have an earlier MRI, all you need to do is count. No need, initially for contrast.

Kyle

[doublevision1]

I would think a MRI on a 3T would show large lesions, but not that they are new, as it is the contrast dye that would indicate which lesions are new by lighting them up. However as you have a previous MRI to compare to, a new one should show if there have been any new lesions develop since that first one was done, just not whether they are new.  Lesions that enhance with contrast indicate current inflammation ie: current MS relapse, would be considered to be 'new' and I believe are generally thought to be up to 30 days old.  Best to confirm this though with your neuro or radiologist.  Sorry, I cannot be of any help regarding you question re: effect on the kidneys, hopefully some else here can help you out with this.