ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Psychology => Topic started by: Boots on May 24, 2010, 06:20:47 pm

Title: CT scan
Post by: Boots on May 24, 2010, 06:20:47 pm

I'm having difficulty finding Limitations to this process.
I know that during a CT scan the subject is exposed to RADIATION and given an injection of a CONTRAST, however medical experts believe this to be non-invasive. But can I still list this as a limitation cos' it does have a RISK of it being harmful.

Title: Re: CT scan
Post by: littlebecc on May 24, 2010, 06:25:29 pm

Limitation:
Shows only brain structure or anatomy
- it does not provide info about activity of the brain ie brain function

That's all i have on limitations for it i'm pretty sure...

Title: Re: CT scan
Post by: akira88 on May 24, 2010, 08:48:39 pm

Limitations:
-does not show function of the brain
-needs highly trained staff to operate
-x-rays are used, therefore exposure is limited

Title: Re: CT scan
Post by: minilunchbox on May 24, 2010, 08:55:58 pm

Quality of images aren't as detailed as MRI.

Title: Re: CT scan
Post by: ChairmanMao on May 25, 2010, 08:29:23 pm

-Quality of images aren't as detailed as MRI
- Only shows the anatomy(structure) of the brain, not function
- Requires injection of substance (seen as a limitation versus MRI)

Title: Re: CT scan
Post by: littlebecc on May 26, 2010, 09:00:55 am

there's no injections in a CT scan...

Title: Re: CT scan
Post by: Glockmeister on May 26, 2010, 11:04:26 am

Quote from: littlebecc on May 26, 2010, 09:00:55 am

there's no injections in a CT scan...

That's correct, you must be thinking PET scans, Chairman Mao.

Akira more or less nailed it on the head.

Title: Re: CT scan
Post by: ChairmanMao on May 26, 2010, 06:32:05 pm

Quote from: Glockmeister on May 26, 2010, 11:04:26 am

Quote from: littlebecc on May 26, 2010, 09:00:55 am

there's no injections in a CT scan...

That's correct, you must be thinking PET scans, Chairman Mao.

Akira more or less nailed it on the head.

Incorrect, littlebecc.

"CT is a medical procedure that can only be performed by a specialist doctor called a radiologist. The research participant (or patient) must first be given an injection of a substance into the vein of their arm or hand. The substance that is injected is commonly called contrast and is based on iodine. This is used to highlight the brain's blood veslels and greatly assists the radiologist and researcher in interpreting the CT images." - (Grivas, 2004)

Title: Re: CT scan
Post by: littlebecc on May 26, 2010, 06:38:04 pm

Well according to VCAA....

Title: Re: CT scan
Post by: vexx on May 26, 2010, 07:43:52 pm

nahh it's true CT scans have an iodine contrast injection, we had to know this last year.

Title: Re: CT scan
Post by: littlebecc on May 26, 2010, 08:52:38 pm

Hmmm...then how come it's not considered invasive?

Title: Re: CT scan
Post by: Nullisecundus on May 30, 2010, 01:09:08 pm

in some texts it says its not considered invasive

howwever i'd say its 'mildly' invasive, as the iodine based contrast is not radioactive nor harmful
but it still requires you injecting a substance INTO you..

so to be on the safe side i wouldnt say that it isnt invasive :)

Title: Re: CT scan
Post by: Visionz on May 30, 2010, 01:51:00 pm

The safe side would be "some consider it invasive"