Re: Article: Lung cancer screening raises OR LOWERS lung cancerrisk

[Kai Kaletsch <eic@shaw.ca>]

John wrote: "...doses at rates less than 100 mSv cannot be shown to have

either a beneficial or detrimental effect."



I think the upper limit on any detrimental effect per Sv is fairly well

established and, yes, it is so small that it may be difficult to observe

experimentally. What is the upper limit of the beneficial effect per Sv?

Which experiments or data sets can be used to establish that upper limit?



Kai







----- Original Message ----- 

From: "John Jacobus" <crispy_bird@YAHOO.COM>

To: "Howard Long" <hflong@pacbell.net>; <TConley@kdhe.state.ks.us>;

<radsafe@list.vanderbilt.edu>

Cc: <rad-sci-1@wpi.edu>

Sent: Tuesday, June 29, 2004 8:34 PM

Subject: Re: Article: Lung cancer screening raises OR LOWERS lung cancer

risk





> I appreciate the information on PSA and its relation

> to prostate cancer.

>

> While effects can be shown for isolated cases of low

> dose radiation expose, hormesis will always be a

> marginal subject. As I have stated many times, doses

> at rates less than 100 mSv cannot be shown to have

> either a beneficial or detrimental effect.

>

> --- Howard Long <hflong@pacbell.net> wrote:

> > John and other hormesis marginalizers,

> >

> > 1. Metastases or regrowth may be indicated by PSA up

> > after prostate removal

> > or ablation.

> > 2. Radiation oncologists and all other physicians

> > are greatly inhibited by

> > lawsuits for any non-standard treatment.

> > 3.Sensitzing with LDR (10-75 rad) before

> > radiotherapy of c100rad 3x/week for

> > 6-8 weeks, has shown much better response of cancers

> > (see references on

> > Muckerheide's list below).

> >

> > Howard Long

> >

> > ----- Original Message ----- 

> > From: "John Jacobus" <crispy_bird@yahoo.com>

> > To: "Howard Long" <hflong@pacbell.net>; "John

> > Jacobus"

> > <crispy_bird@YAHOO.COM>; <TConley@kdhe.state.ks.us>;

> > <radsafe@list.vanderbilt.edu>

> > Cc: <rad-sci-1@wpi.edu>

> > Sent: Monday, June 28, 2004 1:37 PM

> > Subject: Re: Article: Lung cancer screening raises

> > OR LOWERS lung cancer

> > risk

> >

> >

> > > Why would a patient be treated for increased PSA?

> > > Since when is a radiation oncologist restricted by

> > > regulations?  How would sensitizing a patient with

> > LDR

> > > help with radiation treatement?  Following your

> > logic,

> > > that would make the tumor more radiation

> > resistent?

> > >

> > > --- Howard Long <hflong@pacbell.net> wrote:

> > > > "Political agenda" or scientific correction,

> > John?

> > > >

> > > > Yes, I would want hormesis, hopefully with less

> > cost

> > > > but dose equal to or

> > > > greater than CT.

> > > >

> > > > And it's not just me.

> > > > At the DDP meeting 2 days ago, a health

> > physicist

> > > > sought from me and a

> > > > radiation oncologist how to get LDR (for

> > increasing

> > > > PSA, after prostate

> > > > removal years ago for cancer). That radiationo

> > > > oncologist had felt

> > > > restricted 5 years ago (from treating another

> > health

> > > > physicist I referred to

> > > > him with prostate cancer), with sensitizing LDR

> > 2

> > > > weeks before high dose

> > > > radiotherapy for the cancer.

> > > >

> > > > Apparently, standard therapy (dictated by

> > lawsuits)

> > > > is becoming more

> > > > scientific.

> > > >

> > > > Howard Long

> >

> >

>

>

> =====

> +++++++++++++++++++

> "To be persuasive, we must be believable,

> To be believable, we must be credible,

> To be credible, we must be truthful."

> Edward R. Murrow

>

> -- John

> John Jacobus, MS

> Certified Health Physicist

> e-mail:  crispy_bird@yahoo.com

>

>

>

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