Reply by aruzinsky February 8, 20082008-02-08
On Jan 30, 6:45&#2013266080;pm, George Orwell <nob...@mixmaster.it> wrote:
> I reckon once upon time that geophysics (particularly seismology) > was driving a lot of research into signal processing. > Now it seems to me they are falling behind. > I think that medical imaging is now ahead of them in finding > new random noise attenuation tricks, for example. > > A penny for your thoughts? > > Il mittente di questo messaggio|The sender address of this > non corrisponde ad un utente &#2013266080; |message is not related to a real > reale ma all'indirizzo fittizio|person but to a fake address of an > di un sistema anonimizzatore &#2013266080; |anonymous system > Per maggiori informazioni &#2013266080; &#2013266080; &#2013266080;|For more info > &#2013266080; &#2013266080; &#2013266080; &#2013266080; &#2013266080; &#2013266080; &#2013266080; &#2013266080; &#2013266080;https://www.mixmaster.it
There is substantial commonality of subject matter across diverse academic areas therefore one should look outside one's own field for fresh ideas. For example, let's not forget the contributions of economists to time series analysis. I believe the first stochastic convergence proof for LS estimation of AR parameters was published in Economerica in 1943.
Reply by Jerry Avins February 8, 20082008-02-08
News Reader wrote:
> Jerry Avins schrieb: >> News Reader wrote: >>> Jerry Avins schrieb: >>>> Steve Underwood wrote: >>>> >>>> ... >>>> >>>>> Inserting contrast agents is highly undesirable. Look at the >>>>> comples stuff which has been developed, like acoustic microscopes, >>>>> to avoid the need to even stain a slide. >>>> >>>> Injected contrast dye is hard on the kidneys. In my case, it is >>>> avoided unless absolutely necessary, and then preceded, accompanied, >>>> and followed by protective medication. Not done lightly. >>>> >>>> ... >>>> >>>> Jerry >>> Not necessarily. Imagine US agents composed from sugar, water, and >>> air bubbles ... >>> Further in this particular scope imagine you could apply ca for seismic >>> or sonar imaging ;-) >> >> Not necessarily what? What are US agents, G-men? >> >> Jerry > ultrasound contrast agents are not hard on the kidney since they are > made from sugar water and air ... now clear?
Yes. MRI contrast agents are not so benign. jerry -- Engineering is the art of making what you want from things you can get. &#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;
Reply by News Reader February 8, 20082008-02-08
Steve Underwood schrieb:
> News Reader wrote: >> Jerry Avins schrieb: >>> News Reader wrote: >>>> Jerry Avins schrieb: >>>>> Steve Underwood wrote: >>>>> >>>>> ... >>>>> >>>>>> Inserting contrast agents is highly undesirable. Look at the >>>>>> comples stuff which has been developed, like acoustic microscopes, >>>>>> to avoid the need to even stain a slide. >>>>> >>>>> Injected contrast dye is hard on the kidneys. In my case, it is >>>>> avoided unless absolutely necessary, and then preceded, >>>>> accompanied, and followed by protective medication. Not done lightly. >>>>> >>>>> ... >>>>> >>>>> Jerry >>>> Not necessarily. Imagine US agents composed from sugar, water, and >>>> air bubbles ... >>>> Further in this particular scope imagine you could apply ca for seismic >>>> or sonar imaging ;-) >>> >>> Not necessarily what? What are US agents, G-men? >>> >>> Jerry >> ultrasound contrast agents are not hard on the kidney since they are >> made from sugar water and air ... now clear? > > Nitroglycerine is made from a sugar too. What's your point? > > Steve
That the *general statement* "Injected contrast dye is hard on the kidneys" is plainly wrong.
Reply by Steve Underwood February 8, 20082008-02-08
News Reader wrote:
> Jerry Avins schrieb: >> News Reader wrote: >>> Jerry Avins schrieb: >>>> Steve Underwood wrote: >>>> >>>> ... >>>> >>>>> Inserting contrast agents is highly undesirable. Look at the >>>>> comples stuff which has been developed, like acoustic microscopes, >>>>> to avoid the need to even stain a slide. >>>> >>>> Injected contrast dye is hard on the kidneys. In my case, it is >>>> avoided unless absolutely necessary, and then preceded, accompanied, >>>> and followed by protective medication. Not done lightly. >>>> >>>> ... >>>> >>>> Jerry >>> Not necessarily. Imagine US agents composed from sugar, water, and >>> air bubbles ... >>> Further in this particular scope imagine you could apply ca for seismic >>> or sonar imaging ;-) >> >> Not necessarily what? What are US agents, G-men? >> >> Jerry > ultrasound contrast agents are not hard on the kidney since they are > made from sugar water and air ... now clear?
Nitroglycerine is made from a sugar too. What's your point? Steve
Reply by News Reader February 8, 20082008-02-08
Jerry Avins schrieb:
> News Reader wrote: >> Jerry Avins schrieb: >>> Steve Underwood wrote: >>> >>> ... >>> >>>> Inserting contrast agents is highly undesirable. Look at the comples >>>> stuff which has been developed, like acoustic microscopes, to avoid >>>> the need to even stain a slide. >>> >>> Injected contrast dye is hard on the kidneys. In my case, it is >>> avoided unless absolutely necessary, and then preceded, accompanied, >>> and followed by protective medication. Not done lightly. >>> >>> ... >>> >>> Jerry >> Not necessarily. Imagine US agents composed from sugar, water, and air >> bubbles ... >> Further in this particular scope imagine you could apply ca for seismic >> or sonar imaging ;-) > > Not necessarily what? What are US agents, G-men? > > Jerry
ultrasound contrast agents are not hard on the kidney since they are made from sugar water and air ... now clear?
Reply by Richard Owlett February 7, 20082008-02-07
Jerry Avins wrote:

> News Reader wrote: > >> Jerry Avins schrieb: >> >>> Steve Underwood wrote: >>> >>> ... >>> >>>> Inserting contrast agents is highly undesirable. Look at the comples >>>> stuff which has been developed, like acoustic microscopes, to avoid >>>> the need to even stain a slide. >>> >>> >>> Injected contrast dye is hard on the kidneys. In my case, it is >>> avoided unless absolutely necessary, and then preceded, accompanied, >>> and followed by protective medication. Not done lightly. >>> >>> ... >>> >>> Jerry >> >> Not necessarily. Imagine US agents composed from sugar, water, and air >> bubbles ... >> Further in this particular scope imagine you could apply ca for seismic >> or sonar imaging ;-) > > > Not necessarily what? What are US agents, G-men? > > Jerry
I thought you would pick up on wishing to provide MULTIPLE air embolisms. The bends anyone?
Reply by Jerry Avins February 7, 20082008-02-07
News Reader wrote:
> Jerry Avins schrieb: >> Steve Underwood wrote: >> >> ... >> >>> Inserting contrast agents is highly undesirable. Look at the comples >>> stuff which has been developed, like acoustic microscopes, to avoid >>> the need to even stain a slide. >> >> Injected contrast dye is hard on the kidneys. In my case, it is >> avoided unless absolutely necessary, and then preceded, accompanied, >> and followed by protective medication. Not done lightly. >> >> ... >> >> Jerry > Not necessarily. Imagine US agents composed from sugar, water, and air > bubbles ... > Further in this particular scope imagine you could apply ca for seismic > or sonar imaging ;-)
Not necessarily what? What are US agents, G-men? Jerry -- Engineering is the art of making what you want from things you can get. &#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;
Reply by News Reader February 7, 20082008-02-07
Scott Seidman schrieb:
> aruzinsky <aruzinsky@general-cathexis.com> wrote in news:e2aa1fdc-f0bf- > 4cf9-8989-3aef7ec86f99@q39g2000hsf.googlegroups.com: > >> Only a small fraction of the people who practice medical imaging know >> what they are looking at. > > Your idea of medical imaging, frankly, seems to be an understanding of what > goes on at the clinical level. Others, like those that actually read some > of the medical imaging literature, have a better feeling for the state of > the art and current research directions. >
Despite that one should not confuse medical image processing (as is done with e.g. CT-, MR-, US-, ... images) and medical image generation (as is done in CT-, MR-, US-, ... devices). The techniques used in the latter scope will be well applicable to other technical domains. The images delivered by an e.g. cardiac ultrasound device and the techniques applied to them will probably not be suited for other applications ...
Reply by News Reader February 7, 20082008-02-07
Scott Seidman schrieb:
> Eric Jacobsen <eric.jacobsen@ieee.org> wrote in > news:rch9q31ebh1q7hjrpkjn9pc3te9kn4lkav@4ax.com: > >> On 2 Feb 2008 17:27:31 GMT, Scott Seidman >> <namdiesttocs@mindspring.com> wrote: >> >>> Rune Allnor <allnor@tele.ntnu.no> wrote in news:db30687f-fde1-412f- > a1ab- >>> af8bb4efa4d7@v29g2000hsf.googlegroups.com: >>> >>>> As far as I know, the ideas for a remote cardiology >>>> diagnostics device were not pursued further. >>>> >>>> >>> EMT's are beaming EKGs to ER's every day. >> Do you know what sort of radio link equipment they're using to do >> that? I'm curious. >> >> >> Eric Jacobsen >> Minister of Algorithms >> Abineau Communications >> http://www.ericjacobsen.org >> > > > No clue, unfortunately. A google search for wireless ecg is yielding a > ton of hits, but its a little tough to separate out transimission of the > actual ecg from transmission of emergency-type events. > > For what its worth, I bet its not a huge compression problem. This stuff > has been sent by telephone for decades. You need to have about a 500 Hz > sample rate. 30 or 60 seconds of 12-channel data at 500 Hz is not a huge > problem. >
Right and very often only 1 channel is in use with 250Hz frequency and 8 - 12 bps. That's a rediculous amount compared to the image data ...
> http://cse.spsu.edu/pbobbie/New_pdf/VeryFinalEKGAcquisitionCamReady1.pdf > has a bit of a review. >
Reply by News Reader February 7, 20082008-02-07
Jerry Avins schrieb:
> Steve Underwood wrote: > > ... > >> Inserting contrast agents is highly undesirable. Look at the comples >> stuff which has been developed, like acoustic microscopes, to avoid >> the need to even stain a slide. > > Injected contrast dye is hard on the kidneys. In my case, it is avoided > unless absolutely necessary, and then preceded, accompanied, and > followed by protective medication. Not done lightly. > > ... > > Jerry
Not necessarily. Imagine US agents composed from sugar, water, and air bubbles ... Further in this particular scope imagine you could apply ca for seismic or sonar imaging ;-)