Magnetic resonance Imaging(MRI)-a noninvasive diagnostic : GMAT Critical Reasoning (CR)
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# Magnetic resonance Imaging(MRI)-a noninvasive diagnostic

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Manager
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Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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02 Jun 2005, 02:23
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Magnetic resonance Imaging(MRI)-a noninvasive diagnostic procedure can be used to identify blockages in the coronary arteries.In contrast to angiograms-the invasive procedure customarily used -MRI's pose no risk to patients.Thus to gaurantee patient safety, in the attempt to diagnose arterial blockages ,MRI's shoulf replace angiograms in all attempts at diagnosing coronary blockages.

Which of the following would most support the recommendation above?
a)Angiograms can be used to diagnose conditions other than blockages in arteries
b)MRI's were designed primarily in order to diagnose blockages in the coronary arteries
d)An MRI is just as likely as an angiogram to identify an arterial blockage
e)Some patients for whom an angiogram presents no risk are unwilling to undergo an MRI

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If you have any questions
New!
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02 Jun 2005, 03:29
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premise: I don't like this question because it seems to play on a subtle difference between diagnosis of arterial blockages and diagnosis of coronary blockages, and I am not supposed to know the difference!

A: out. weakens
C. out. weakens
E. out. weakens.

it is a tough choice b/w B and D.
conclusion:
MRI's should replace angiograms in all attempts at diagnosing coronary blockages.
MRI's were designed primarily in order to diagnose blockages in the coronary arteries
An MRI is just as likely as an angiogram to identify an arterial blockage

hope this helps
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02 Jun 2005, 03:35
(B) would be the best option. If it was designed primarily in order to diagnose blockages in coronary arteries, then the method would be perfected with the one function in mind.

(A) just serves to say that an Angiograms serves many other purposes.

(C) goes to say MRI is not as good as an Angiogram

(D) looks like a good choice. If an MRI scan is equally capable to identify an arterial blockage, then it should be used since it's a safer method.

(E) goes to indicate that patients have no confidence in the procedure.

Between (D) and (B), I would go with (B). We're already told that MRI is safe, so this premise holds for both (D) and (B). But (B) is stronger as we're told the primary purpose of MRI is to locate blockage in coronary arteries.

B for me.
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02 Jun 2005, 08:06
The only choices left are B and D

D says, they are as likely as, which could mean, sometimes not better than Angiograms .

B says, MRI is specially designed for that purpose and argument already states that it does the job of identifying the arterial blockages.

I will go with B
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02 Jun 2005, 08:22
I'll go for D.
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02 Jun 2005, 12:21
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D)...both are as likely to identify the blockage, but MRI has fewer risks. so lets choose MRI.

B) angiograms can be designed primarily to diagnose XYZ as well. we dont know. its not enough to support the recommendation.
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02 Jun 2005, 15:29
in B we know that MRI is better than AG.....

D says both are equally effective which doesnt help us
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02 Jun 2005, 17:13
the fact that they were designed for it doesn't mean that they are better....

only D talks about whether MRIs are as effecting as the traditional method...hence i would go for D too
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02 Jun 2005, 17:28
Between B/D I will go for D .
because we are asked to find out the option which supports the recommendation..

So any good comment on functionality of the method can be used to recommend.
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02 Jun 2005, 18:20
D it is.

The argument - replace angiogram with MRI - Why? Because they are safer. However, at the least they shud be able to have the same functionality as angiogram. D says that. Just because MRI is designed to detect coronary arteries, it doesn't mean it is better than angiogram functionalitywise.
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03 Jun 2005, 00:40
1 more for D.
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03 Jun 2005, 02:22
Clear D imo

2 qualities => being safe, efficient. MRI is safer and just as effitient as the other
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03 Jun 2005, 09:27
very nice explanations indeed.

Best.
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18 Nov 2011, 23:54
gmat2me2 wrote:
in B we know that MRI is better than AG.....

D says both are equally effective which doesnt help us

Hi,
Only the premise says, MIR is better than Angio.
D says they are equal, so with premise, conclusions get easier.

Thanks!
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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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13 Dec 2011, 01:53
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b)MRI's were designed primarily in order to diagnose blockages in the coronary arteries
Ok, if MRI's have some features that is interior than angiogram, then MRI should not be replaced. So, this answer is wrong.
d)An MRI is just as likely as an angiogram to identify an arterial blockage

This answer support MRI have 1 feature better than angiogram. Other features are the same. So, support.
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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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26 Dec 2011, 11:19
it should be B or D
i will say D
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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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28 Dec 2011, 01:41
After searching in some Chinese forum, I found the OA is D
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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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28 Dec 2011, 02:39
i agree with D
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Last edited by mydreammba on 28 Dec 2011, 17:07, edited 1 time in total.
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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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28 Dec 2011, 04:11
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I think it should be D as the end purpose of argument is to conclude that MRI can replace other method of diagnostic and D says that it is same as using MRI so I ill go for D
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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic [#permalink]

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16 Nov 2014, 15:54
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Magnetic resonance Imaging(MRI)-a noninvasive diagnostic   [#permalink] 16 Nov 2014, 15:54

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