Tuesday, December 13, 2005

Less Than 2 seconds

DDI has been testing a protocol to reduce dose to children for orthodontic applications, and we have asked Arun a few questions about this to understand the capabilities of the I-CAT.

We tested this using the 13cm height with a 10 second scan mode. Then we imported the data into Dolphin 3D and created the typical ortho views plus added views like TM joint, airway and 3D renderings. When I asked Arun how much time the patient was being exposed to the pulsed 10 second scan he said “Less than 1.75 seconds” Arun further stated that “Dose could be lowered further, perhaps dramatically, we (ISI) intend to launch a project to investigate this soon”.

We tested this theory by doing a scan on a orthodontist that was asking the question about mid treatment scans. His thoughts were that we may do a higher resolution scan in the beginning ortho to rule out any abnormalities, and if the case was a “standard” case, then at mid-treatment, we could consider doing a low resolution scan.

The images attached is of the Orthodontist, and the images should be of better quality if we use a child.


Blogger Eric Iwamoto said...

That was a great idea to test the 10 second scan with the new 3D Dolphin software! Anytime radiation can be reduced is always beneficial.
Craig, from your posted images, it appears there is still sufficient detail in the lateral cephalometric profile to construct an accurate analysis. Craig, would it be possible for you to post the lateral and coronal TMJ views of that ten second scan too?

12:12 PM  
Blogger Chester Wang said...

I got a couple of inquiries on how Craig's "second" (3D looking, colored) image was generated. It was by Dolphin 3D! The original data was derived from 3dMD for the facial surface and the CBCT data was from i-CAT.

Dolphin 3D has a very nice and easy interface that allows you to merge the two and nicely present them to the user.

Email me (chester@dolphinimaging.com) or blog here if you want to know more.


11:01 AM  
Blogger Amnon said...

I was actually going to try a lower kv/ma setup. As after the sucsessful ortho meeting we have more demand. I think it is possible in the xml file. But I guess I'll have to calibrate before each change.

4:02 PM  

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