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| Result: Searchterm 'Magnet'
found in 87 messages |
| Result Pages: 1 2 [3] 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
More Results:  Database (669) News Service (897) Resources (213) |
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Lorenzo Nigris
Sun. 28 Nov.21,
03:43
[Start of:
'ASL Labeling Slab'
0 Reply]
 Category:
Site Planning and Specifications
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| ASL Labeling Slab |
Dear all,rnrnI am currently about to set up a pulsed ASL(pASL) sequence on a 3T Siemens MAGNETOM Prisma. Unfortunately, during the plan of the sequence I cannot visualize the labeling slab. Does anybody know how to visualize and set it up? (see Picture)rnrnThanksrn
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Gary Brown
Mon. 14 Jun.21,
15:20
[Start of:
'Stents'
0 Reply]
Category:
General
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| Stents |
Employer relates that any cardiac stent implanted after 2008 is safe on ANY MRI scanner within our system. This ranges from 0.3 Open scanners to 1.2 High field Open and 1.5 and 3T closed systems.
Contrarily, the manufacturer data on certain stents states 1.5 or 3 T ONLY, but we are urged to scan on an open if implanted after 2008. Does anyone have any type of testing documentation that this is safe? I'm not so much worried about the field strength as I am the magnetic field orientation as the defining safety issue.
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Brenna Bray
Tue. 10 Mar.20,
15:59
[Start of:
'Proton excitation from B0 to B1'
0 Reply]
Category:
General
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| Proton excitation from B0 to B1 |
I'm new to MRI imaging and currently taking an introductory course online. I understand that the introduction of a small magnetic field/RF pulses on top of the static magnetic field (B0) excites protons into a high energy state (B1). Does this mean that the protons are excited from a spin that is parallel to the longitudinal B0 plane to one that is antiparallel to the longitudinal B0 plane, or that the proton spin is excited from one that is aligned/polarized with B0 to one that is either parallel or antiparallel to B0 in the B1/xy plane?
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Steven Ford
Fri. 26 Oct.18,
02:29
[Reply (1 of 2) to:
'When to shim?'
started by: 'Matt H'
on Fri. 27 Oct.17]
Category:
General
|
| When to shim? |
you ask a complex question. Any sequence that is not a standard spin echo can benefit from shimming, but its not always worth it.
If you are scanning a knee in the center of the magnet, or nearly so, you might not see much difference in gradient echo scans, which in general are quite sensitive to shim problems. But if you are doing fat-water separation or fatsat images, you will see a difference even in this example.
Because hardware varies, its hard to say in one blanket statement for every case. For sure, do it on fatsat or fat-water imaging. The next most sensitive studies are off-center imaging such as shoulders. Beyond that, you should experiment a little. Of course, erring on the side of caution is a good idea.
Steven Ford
Professional Imaging Services, Inc.
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lau Moon
Tue. 31 Jul.18,
02:14
[Start of:
'custom all types of coils'
0 Reply]
Category:
Coils
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| custom all types of coils |
We are a professional large-scale manufacturer of all types of inductor coil, we can custom coil for sensor，wireless device,RF technology,rnFor the coils Features: rn1. Winding with self-bonding wire rn2. Winding different shapes as per your inquiry rn3. Meet your inquired inductance and resistance rn4. Windings are bond by a strong adhesive rnrnOur product including:air core coil,RF coil,receiver coil,wireless charge coil,transmitter coil,sensor coil,Electromagnetic Coil, miniature inductor coil,etc.rnrnAny coils inquiry pls contact me: latinolaucoil@hotmail.com
Any coils inquiry pls contact me: latinolaucoil@hotmail.com
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