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MRI is trending to low field magnets :
reduced costs will lead to this change 
AI will close the gap to high field 
only in remote areas 
is only temporary 
never 
 
MRI Forum
'Pixel'
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kulas diana

Fri. 28 Apr.17,
14:59

[Start of:
'C.spine ACR protocol for Aries II'
0 Reply]

 
  Category: 
General
 
C.spine ACR protocol for Aries II
Im having difficulty producing a good quality exam to pass ACR accreditation for Aries II .3T open.
can someone give me any tips pls.
specially the
T2 sag

Slice thickness must be <3.0mm
GAP< 1.0mm
In plane pixel(read)<1mm
In plane pixel(phase)<1mm
Pixel are<1

I Cant get it in specs. without going over this numbers
thanks in advance
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Sai Mahathi Yasa

Sun. 29 Mar.15,
04:58

[Start of:
'Re: Calculation of Resolution and Tr'
0 Reply]

 
  Category: 
Basics and Physics
 
Re: Calculation of Resolution and Tr
Tacq= 32s
Gradient strength= 10mT/m
Matrix size=256x256 pixels
dwell time= 0.03ms

How to calculate resolution and Tr?
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Steven Ford

Tue. 5 Aug.14,
19:57

[Reply (3 of 4) to:
'MRI artifact'
started by: 'Daniel Cronk'
on Mon. 16 Jun.14]

 
  Category: 
Artifacts
 
MRI artifact
No it is not an RF leak artifact. That would appear different. I would guess that there was one instance of motion. Note that the artifact is mostly on the high contrast areas (white against black) where the patient can move the most.

Also it may be that your acquisition matrix was a little on the low side, which would lead to larger pixel-y appearance that is more apparent when there's motion.
 
 

Steven Ford
Professional Imaging Services, Inc.
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George LoGuirato

Thu. 18 Feb.10,
16:26

[Reply (1 of 2) to:
'bandwidth'
started by: 'Stephen Roberts'
on Mon. 15 Feb.10]

 
  Category: 
Devices, Scanner, Machines
 
bandwidth
Quite possible. Manufactures like their own designations for bandwidth for ??? reasons. GE uses true bandwidth in KHz. Siemens uses Hz/PIXEL. Not sure what Toshiba uses. Contact Toshiba applications for designator and conversion factor.
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crystal f

Sun. 18 Oct.09,
21:34

[Start of:
'Math equation'
3 Replies]

 
  Category: 
Basics and Physics
 
Math equation
Can some one help me w/this question.

From the following parameters what will the scan time be, in minutes, to acquire data?

TR 2000msec FREQUENCY STEPS 256
TE 60msec NEX 2
T1 800msec FLIP ANGLE 90
pixel .95x.95mm PHASE STEPS 192

THANKS
 
 

mr registry review
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