On 5 Feb, 17:51, Jerry Avins <j...@ieee.org> wrote:> Vladimir Vassilevsky wrote: > > > Rune Allnor wrote: > > >> I read the introduction chapter in Friedlander's (sp?) book from 1986 > >> or > >> so, on state space systems. It was very interesting to see his > >> interpretation > >> of engineering as governed by tradition and culture. The difference > >> between > >> the western approach and the (then) Soviet approach to control > >> systems was rather profound. > > > ???? > > > I am curious to know what is the difference. > > I am too. One example that purports to show the differing influences of > authoritarian and somewhat democratic societies on engineeringI may be a bit naive as I did not intend to include political issues like religion or government in the term 'culture'; I merely meant 'academic culture'. There used to be an old joke about academic culture that the Russians are able to develop theory to a level unbelivable for others bu they didn't have a lot of computer resources; Americans attacked every problem with enormous computational power and little theoretical studies, while Europeans ended up in between with neither theoretical talent nor vast computational resources. Rune
medical imaging is the vanguard of signal processing in 21st
Started by ●January 30, 2008
Reply by ●February 5, 20082008-02-05
Reply by ●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. > > ... > > JerryNot 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 ;-)
Reply by ●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 ●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 ●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. �����������������������������������������������������������������������
Reply by ●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? > > JerryI thought you would pick up on wishing to provide MULTIPLE air embolisms. The bends anyone?
Reply by ●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? > > Jerryultrasound contrast agents are not hard on the kidney since they are made from sugar water and air ... now clear?
Reply by ●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 ●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? > > SteveThat the *general statement* "Injected contrast dye is hard on the kidneys" is plainly wrong.
Reply by ●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. �����������������������������������������������������������������������
