| Info Sheets |
| | | | | | | | | | | | | | | | | | | | | | | | |
| Out- side |
| | | | |
|
| | | | | |
Result: Searchterm 'tr'
found in 421 messages |
Result Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 [27] 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 |
More Results: Database (1011) News Service (1852) Resources (540) |
|
Kimberly Wilridge
Fri. 26 Jul.13, 16:38
[Reply (1 of 2) to: 'Help to identify' started by: 'Alexey Bobrov' on Wed. 5 Jun.13]
Category:
Equipment |
Help to identify |
It looks like it may be be a capacitor or some kind. Siemens uses a lot of internal parts that don't match or compare to GE or Philips and most of their caps are there's and you might want to try looking in: alibaba for china/japan makers. If you can remove the other one and attach it to a capacitor reader or bench analyzer might help also. A digital multimeter would rule out resistor or diode.
|
| View the whole thread | | |
Barry Ng
Wed. 10 Jul.13, 17:10
[Start of: 'Titanium & MRI Safety' 2 Replies]
Category:
Safety |
Titanium & MRI Safety |
I am trying to understand why titanium is considered "MRI Safe".
I see three potential problems when considering the MRI safety of a material:
1 - If it is a ferromagnetic material extreme damaging forces will be applied to the material if exposed to a very strong magnetic field. Titanium is not a magnetic material so I do not see this as a problem.
2 - When a relatively large flat conductor (e.g. a titanium plate) is exposed to a changing magnetic field (Faraday's law) eddy currents will be created internally as the result of induced voltages. These eddy currents can be very high and cause resistive heating ("I squared R losses"). I would think these eddy currents would have the potential to cause extreme heating of the titanium. I know from experience this does occur with steel and titanium has a conductivity about the same as steel. Titanium is not magnetic as is steel but induced voltages due not require a ferromagnetic material (.e.g. copper as used in real world generators, etc.).
3 - Induced voltages are created across the length of a conductor as the result of the conductor being exposed to a changing magnetic field ("genrator effect" - Faraday's Law). Again this effect does not require a magnetic material. So why, at best, does this effect not have the potential to be uncomfortable or even very painful to the MRI patient being exposed to a huge changing magnetic field?
Invariably the response to why titanium is safe focuses on the fact that it is not magnetic. I get the deer in the headlight look when I ask about eddy current heating and induced voltages.
Please help me understand why unduced eddy current heating and induce voltages are not a concern.
|
| View the whole thread | Reply to this thread (login or register first) | |
twid twid
Mon. 10 Jun.13, 18:07
[Start of: 'BUild MRI machine' 0 Reply]
Category:
Devices, Scanner, Machines |
BUild MRI machine |
is it possible to get mri hardware without computation hardware and software for image reconstruction?
I means, I want to by only hardware to get data from sensor and i have computation unit and software for image reconstruction...
|
| | Reply to this thread (login or register first) | |
Alexey Bobrov
Wed. 5 Jun.13, 14:08
[Start of: 'Help to identify' 1 Reply]
Category:
Equipment |
Help to identify |
Hi all!
Help me please identify burned element on the photo.
490G 7KV 652505 written on it. What is this and where can I bye it or similar?
This is Siemens Magnetom Trio A Tim System 2008 year
Thanks in avance!
|
| View the whole thread | Reply to this thread (login or register first) | |
Reader Mail
Sun. 19 May.13, 05:18
[Start of: 'hearing protection' 0 Reply]
Category:
Safety |
hearing protection |
Here's the deal: I am an MRI student doing an internship on a GE 1.5T magnet. I mistakenly scanned a person (shoulder, about 15-20 min) without ear plugs or headphones. She complained to me personally and said that she should have had protection. I agreed. I am considering this a huge deal. Am I overreacting? I obviously know that hearing protection is a basic requirement for scanning and that significant damage can occur to the patient. In the heat of the day, I just got distracted and it slipped my mind. Is this an offense that can result in me getting fired?
|
| | Reply to this thread (login or register first) |
| |
| Result Pages : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 [27] 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | |
|
| |
| Look Ups |
| |