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| Result: Searchterm 'Slab'
found in 4 messages |
| Result Pages: [1] |
More Results:  Database (28) Resources (1) |
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Bernhard Schenkenfelder
Mon. 6 Dec.21,
08:38
[Start of:
'What is the state of the art in non-rigid registration of MRI slabs?'
0 Reply]
 Category:
General
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| What is the state of the art in non-rigid registration of MRI slabs? |
Are there widely accepted methods for non-rigid registration of (partially overlapping) MRI slabs? What is the best way to get rid of the steps between the individual slabs in 3D?
 Slabs
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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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Renate Semrau
Mon. 28 Aug.23,
07:23
[Reply (1 of 2) to:
'Improving MEDIC/MERGE/M-ffe and GRE/FFE image quality'
started by: 'Dan Lopez'
on Sun. 27 Aug.23]
Category:
Sequences and Imaging Parameters
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| Improving MEDIC/MERGE/M-ffe and GRE/FFE image quality |
Hi,
Sequences with multiple echoes are unfortunately sensitive to motion and flow artifacts, with the mFFE the echoes are still cumulated afterwards. The use of the head-neck coil provides better SNR. Important are good flow compensation, rest slab, try out foldover direction l/r vs. a/p. Shimming may help, synergy is sometimes better as clear, don't take too many slices, but maybe the signal loss is also a technical problem. Problems in the lung region are common. In short, we use 2D T2 TSE with continuous flow comp.
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GONZALO SOLIS
Tue. 22 Nov.05,
05:35
[Start of:
'usmarine2tim2'
0 Reply]
Category:
Basics and Physics
|
| usmarine2tim2 |
Hello to all my fellow MR Technologists and / or students:
I have a few questions that I would greatly appreciate if someone could help me answer. The dead line is THIS Friday 25th 1000AM morning so please reply STAT
Please e mail me at USMARINE2TIM2@YAHOO.COM
1. . Breath hold duration of less than _________are
recommended when dealing with MR Arenal artery
scan?
a. 30sec
b. 25sec
c. 18sec
d. 8
2. . In renal angiography, what anatomical
landmark does the 3d slab need to cover just
anterior to?
a. Adrenal glands
b. Hepatic vein
c. Portal vein
d. Abdominal aorta
3. .What makes MRI a better choice than DSA for evaluation of a bilateral renal artery stenoses at the orgins of the renal arteries?
a. It is a noisier examination
b. The contrast used is less nephrotoxic than DSA
contrast
c. MRI has higher special resolution than DSA
4. Signal loss will result when further maturation of the clot produces which one of the following?
a. methemoglobin
b. hemosiderin
c. phagocytosis.
d. hemoglobin
5. .For cine gradient echo imaging with true FISP, which of the following statements is TRUE?
a. .images have better image contrast and acquisitions are faster than conventional cine gradient echo imaging
b. cine true FISP images can be performed on any MRI unit
c. to make true FISD images, intravenous gadolinium contrast is needed
d. .true FISP images cannot be used for breath- hold acquisitions because the sequence is too slow
6. Which one of the following statements is NOT
true about phase contrast imaging?
a. .phase contrast imaging is useful for measuring blood flow
b. .phase contrast images are ECG gated
c. .phase contrast images can be performed on most
scanners with cardiac imaging capabilities
d. phase contrast images required
intravenous gadolinium contrast
Thank you so much
Gonzalo RT (R) --future-Ã MR
God Bless
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