CT Scan?

Discussion in 'Support' started by Karl28, Sep 8, 2014.

tinnitus forum
    1. Karl28
      Wishful

      Karl28 Member

      Location:
      Melbourne
      Tinnitus Since:
      2001 bad since 2015
      Cause of Tinnitus:
      Loud music via headphones
      I want to get a scan of my head but I’m too afraid to get a MRI scan because of how loud and long it is.
      However I’ve read that a CT scan is pretty quiet?

      So would it be worth doing a CT scan for tinnitus instead of a MRI?

      What’s the difference?
       
    2. 111

      111 Member

      Mate MRI's are the best, most indepth scan for your head ( my wife works with these machines everyday as part of her job ) over here in WA. I have had at least 3 done recently, just take your own foam ear plugs and you will be fine.
      The only thing i refused last time was to have the chemical dye in your veins to check as fine as they can get, as i just didnt want that stuff in me again, had it once but just didnt want it again thats all.
       
    3. attheedgeofscience
      Uninvolved

      attheedgeofscience Member Hall of Fame

      Location:
      Denmark
      Tinnitus Since:
      Childhood
      Cause of Tinnitus:
      Head Injury
      That would depend in part on what you are trying to etablish via the CT or MRI examination. I would always choose an MRI over a CT scan when examining the head for reason #2, below.

      1. Image quality (Generally better for MRI, but there are exceptions eg. examination of the airways)
      2. Radiation (x 200-300 of a normal x-ray for CT scan; none for MRI)
      3. Dye (worse side-effects for CT scan)
      4. Examination time...
       
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    4. Jay M
      Thinking

      Jay M Member

      Location:
      South Carolina, USA
      Tinnitus Since:
      4/4/14
      Side effects for dye? Please explain. Thx
       
    5. Marlene
      English

      Marlene Member Benefactor

      Location:
      Poole Dorset England
      Tinnitus Since:
      July 1996
      Cause of Tinnitus:
      Bacterial virus
      I've had both MRI for head ,CT for neck ,I'd go MRI every time better over all view they have ,takes bit longer but not by much ,Take in your own favourite CD ,there play it for you whilst in the MRI machine .If you want answers go the best root I would ,and my anxiety couldn't have been any higher than it was then. But that said I did use meditation for that 25 mins ,big bonus for me I can tell you Karl .So MRI gets my tick ,for best way everytime.
      Go with your gut. How bad do you want good answers ? That's the question I'd be asking myself .
       
    6. Dr. Nagler

      Dr. Nagler Member

      Location:
      Atlanta, Georgia USA
      Tinnitus Since:
      04/1994
      @Karl28, here's how I see at it - MRI v CT for tinnitus.

      The question is ... what are you looking for? In the setting of tinnitus, to me the only reason to do either scan would be to identify a lesion of significance that cannot be identified on physical examination or audiological evaluation. And the only lesion of significance that falls under that umbrella would be an acoustic neuroma (also called a vestibular schwannoma), which is a relatively rare benign tumor involving the VIIIth nerve. Certainly there are other lesions associated with tinnitus that can be seen on CT or MRI (otosclerosis, leptomeningeal carcinomatosis, etc.), but by the time these lesions present with tinnitus, they will likely already be apparent due to other symptomatology or audiological findings. (By the way, about the leptomeningeal thingie - it's extremely rare ... and if you have it, you'll be very ill way before the onset of tinnitus!)

      So, back to CT v MRI - does everybody with tinnitus need one ... and if so, which one? Well, since we are looking for an acoustic neuroma, which is almost always unilateral and even if bilateral is not symmetrical, I would say that a scan would be indicated for individuals presenting with unexplained asymmetrical tinnitus lasting more than six weeks. An example of explained asymmetrical tinnitus would be tinnitus in the left ear of a right-handed hunter presenting after shooting a rifle or shotgun for an afternoon of hunting. (The right ear is relatively protected by the right shoulder.) So as I see it, in unexplained asymmetrical tinnitus (with or without asymmetrical hearing loss), a scan is indicated.

      Which scan? Well, for large acoustic neuromas, they are probably equally good. But for small acoustic neuromas, the MRI is superior. Moreover, the use of contrast (gadolinium in the case of an MRI) significantly adds to the sensitivity of the study - and if you are going to go to the trouble of having the study, you want the yield to be as great as possible ... otherwise why bother? So unless there is a strong medical contraindication to using gadolinium contrast, the test that should be ordered is "MRI of the Brain and Internal Auditory Canals with and without Gadolinium to Rule Out Acoustic Neuroma." (I always add in "to rule out acoustic neuroma" so that the neuroradiologist interpreting the study has every advantage possible.)

      Hope this helps more than confuses.

      Dr. Stephen Nagler
       
    7. Thegeen
      Thinking

      Thegeen Member

      Tinnitus Since:
      01/2008
      @Dr. Nagler - I have asymmetrical tinnitus lasting 6 years. It is constant, louder at times than others. Sounds like "eeeeeeeeeeeeeeeeee" but very high pitched. Are there other, more common, reasons for asymmetrical tinnitus or is Acoustic Neuroma most likely the cause? I have an appointment tomorrow with ENT and will request "MRI of the Brain and Internal Auditory Canals with and without Gadolinium to Rule Out Acoustic Neuroma." Thank you!
       
    8. Dr. Nagler

      Dr. Nagler Member

      Location:
      Atlanta, Georgia USA
      Tinnitus Since:
      04/1994
      @Thegeen, it is not at all likely that you have an acoustic neuroma. As I mentioned in my post, these lesions are rare.

      Dr. Stephen Nagler
       
    9. Thegeen
      Thinking

      Thegeen Member

      Tinnitus Since:
      01/2008
      I went to ENT today - audio test found hearing loss in both ears. More so in the left ear. Doctor ordered MRI to rule out acoustic neuroma. He thinks I have a genetic type of hearing loss that progresses overtime. I'm very overwhelmed - fearing what the future might hold - worried that I will lose my hearing altogether. I'm only 39 so this seems very young to have lost so much of my hearing.
       
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    10. Thegeen
      Thinking

      Thegeen Member

      Tinnitus Since:
      01/2008
      Forgot to add that the Dr ordered an MRI to rule out Acoustic Neuroma.
       
    11. Jay M
      Thinking

      Jay M Member

      Location:
      South Carolina, USA
      Tinnitus Since:
      4/4/14
      Second opinion
       
    12. Karl28
      Wishful

      Karl28 Member

      Location:
      Melbourne
      Tinnitus Since:
      2001 bad since 2015
      Cause of Tinnitus:
      Loud music via headphones
      I would like to get a scan of my brain to rule out anything that could be causing my tinnitus and eustachian tube dysfunction but theres no way I would ever get in one of those noisy machines even with earplugs and ear muffs on. No way nothing could convince me.

      Are there any alternatives? Other types of similar scans but not as noisy?
       
    13. Matt01

      Matt01 Member

      Tinnitus Since:
      28/11/14
      I had one and it wasn't that noisy. Had ear plugs and then further sound dampener over that. Reduced noise hugely.
       
    14. Codaz

      Codaz Member

      CT Scan is not noisy. It only turns around you and does some beeps. < 4 mins you are done. I had one done a couple of months ago to inspect my constant running nose.

      MRI makes a hell of a lot more noise. So that's why I didnt do it. But, there are alternatives like the big or wide bore MRI (for heavy people) that is newer and makes less noise. Or, if you can GE has an almost silent MRI. Unfortunately only present yet in some hospitals around the world.

      Furthermore some people here on the forums went into the MRI with earplugs and earmuffs and said it was fine, others said it was terryfing. From what I know the sound is not continuous but episodic.
       
    15. Matt01

      Matt01 Member

      Tinnitus Since:
      28/11/14
      I was actually talking about Mri. With double ear plugs in it was less noisy than many others things I encounter.
       
    16. linearb
      Psychedelic

      linearb Member Hall of Fame

      Location:
      East Coast USA
      Tinnitus Since:
      1998
      Yes, as others have mentioned, a CT scan was no big deal with no noise at all, and an MRI was totally fine with plugs in.

      Neither showed anything useful in my case.
       
      • Helpful Helpful x 1
    17. Asian

      Asian Member

      Tinnitus Since:
      4 weeks
      CT scan isn't noisy at all. If you meant MRI scan, wear ear plugs and noise canceling headphones upon that. You should be OK
       
    18. Karl28
      Wishful

      Karl28 Member

      Location:
      Melbourne
      Tinnitus Since:
      2001 bad since 2015
      Cause of Tinnitus:
      Loud music via headphones
      Oh I think I made a mistake and meant loud MRI scan.

      Is a CT scan a good enough alternative then?
       
    19. Codaz

      Codaz Member

      Did you Google this? What did the doctor say?

      To my understanding a CT only shows bone and some skin. Not nerves, veins or tumors.
      MRI is much different.
       
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      • Helpful Helpful x 1
    20. Matt01

      Matt01 Member

      Tinnitus Since:
      28/11/14
      If you need an MRI, you should get one. Just double up ear protection. It was absolutely fine for me.
       
    21. Petloy
      Happy

      Petloy Member Benefactor

      Location:
      Canada
      Tinnitus Since:
      08/2012
      Hi,

      Going for a CT Scan tomorrow April 15, 2015, (CT neck-contrast)unrelated to T, is the contrast something to be worried about like spiking our T?

      Any quick replies will be greatly appreciated.
       

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