[ RadSafe ] Re: CT Disclosure

[John Jacobus]

Glad to hear that you abandoned your hormesis study. 
I would hate to see you waste your time.  How is your
belt of welding rods doing?

--- howard long <hflong at pacbell.net> wrote:

> CT dose (av 1 rad for chest) is enough that I
> abandoned a hormesis study design in which controls
> would have had CT (and hormesis) while finding lung
> cancer.
>  
> However, patients should be informed of 
> 1, the dose, 
> 2, brief comment from both Gofman fearmongers and
> Luan-like hormesis promoters, and
> 3, the prescribing physician's reason for the CT.
>  
> Howard Long
> 
> John Jacobus <crispy_bird at yahoo.com> wrote:
> I was at a few meetings involving high CT doses.
> Part
> of the problem is that there was never any reason to
> change the machine settings between patients. If the
> dose is too high with film imaging, the film will be
> black. If the CT dose is too high, you just adjust
> the contrast until you get a quality image. There
> was
> no reason to change the settings as you had the
> image
> you needed.
> 
> --- garyi at trinityphysics.com wrote:
> 
> > David,
> > I agree that training and certification are good
> > things to have for technologists, but will 
> > that make a significant difference in patient
> dose? 
> > I don't see much evidence to 
> > indicate that that is the case. No technologist I
> > know acts as if patient dose reduction is 
> > part of the imaging job, and I work in a state
> > *with* credentialing requirements. I think 
> > the other things you mentioned are more important
> in
> > that regard. Regulated dose 
> > limits, regular checks, and penalties for failure
> to
> > comply are what really reduce patient 
> > dose. If credentialed technologists were the key,
> > then pediatric CT doses would not 
> > have caught everybody with their pants down.
> Repeat
> > analysis helps but its only done 
> > at JCAHO facilities. Also, there is significant
> > inconsistency in the regulations with 
> > respect to dose. Consider the various dose limits
> > (or lack thereof) for x-ray vs CT, 
> > fluoro, & mammography.
> > . . .

+++++++++++++++++++
"Every now and then a man's mind is stretched by a new idea and never shrinks back to its original proportion." -- Oliver Wendell Holmes, Jr.

-- John
John Jacobus, MS
Certified Health Physicist
e-mail:  crispy_bird at yahoo.com


		
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