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M.J.Fuller |
digital douuble dipping
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girdy04f girdy04f |
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 M.J.Fuller |
1. RE: digital douuble dipping
Mar 24 2008, 10:13 PM EDT
The term digital double dipping refers to the practise of creating two images from the one exposure. This can only be done with digital imaging (although I have seen it done by copying a plain film to make it lighter!). The method is to display the image on a monitor and save it, then undertake further image manipulations and save it again. See the two eaxamples in this wiki for further information.Cheers. M Fuller |
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Anonymous |
2. RE: digital douuble dipping
Mar 29 2008, 7:47 AM EDT
"can you please give a detailed explanation of the term digital double- dipping, its advantages and pitfalls"Is this the technique that does the double dipping? DUAL ENERGY IMAGING USING OPTICALLY COUPLED DIGITAL RADIOGRAPHY SYSTEM This invention relates to an optically coupled digital radiography method and apparatus for simultaneously obtaining two distinct images of the same subject, each of which represents a different x-ray energy spectrum. The two images may be combined in various ways such that anatomical features may be separated from one another to provide a clearer view of those features or of underlying structures. The two different images are obtained using a pair of scintillators separated by an x-ray filter that attenuates part of the x-ray spectrum of an x-ray exposure such that the first and second scintillators receive a different energy spectrum of the same x-ray exposure. Alternatively, the two different images can be obtained without a filter and with two scintillators made of different fluorescing materials that react differently to the same x-ray exposure. |
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Anonymous |
3. RE: digital douuble dipping
Apr 12 2008, 11:54 PM EDT
Caution: For those of use practicing in North America, Double dipping is highly frowned upon. Especially if your patient is a Medicare patient. This would be called "medicare fraud" and if found to be practicing this practice, one could loose thier license and have a hefty fine. Be cautious of this practice and I would advise not to do it at all in the USA. |
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M.J.Fuller |
4. RE: digital douuble dipping
Apr 13 2008, 9:31 AM EDT
Thanks for your comment- I hadn't thought of the fraudulent aspects of double dipping Note "girdy04f"- you asked about the "advantages and pitfalls"... there's a pitfall!M.J.FULLER |
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Anonymous |
5. digital radiography - exposure indicator.
Jun 8 2008, 3:42 AM EDT
an abdomen x-ray was done using DR, the exposure factors used was 81 kv, 3.817mAs, exposure indicator was 500 . for a well exposedx-ray what should be the EI value ? is EI value: 500 means underexposed x-ray?
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M.J.Fuller |
6. RE: digital douuble dipping
Jun 8 2008, 6:15 AM EDT
I'm not sure that I can add much to my previous reply. Have you read all of this thread and the two pages on this wiki on the subject? I'm assuming that you are familiar with digital radiography and post-processing images. What points on these pages would you like to be clarified? (http://wikiradiography.com/page/Lateral+Chest+X-ray+Digital+Double-Dipping and http://wikiradiography.com/page/Lateral+Sternum+from+Lateral+Chest-+Digital+Double+Dipping) Cheers, M Fuller |
 iraydee8 |
7. RE: digital radiography - exposure indicator.
Jun 9 2008, 12:53 AM EDT
The EI number can be Vendor specific. This indicates the exposure to the detector. I purpose a question to you- For the above stated Abdomen, with the patient's habitus would this 81kvp@3.8 mas be enough to penetrate this pateint? Was the image grainy? I am not familar with other Vendors but with Philips DR. The EI number is indicating the speed of the system. And a 500 EI number would not be underexposed for trust you eyes and your knowledge. If highly underexposed then you will see a grainy image and the dose wouldn't give a good image befor and won't give us one after we confvert to DR/CR |
