June 2011 G485-Fields, Particles and Frontiers of Physics Watch

ChoYunEL
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A self assessment guide, given by my teacher.
If an endoscope comes up, I'll be thanking the poster. lol

5.4.2 Diagnosis methods in medicine
(a) describe the use of medical tracers like technetium-99m to
diagnose the function of organs;
(b) describe the main components of a gamma camera;
(c) describe the principles of positron emission tomography (PET);
(d) outline the principles of magnetic resonance, with reference to
precession of nuclei, Larmor frequency, resonance and relaxation
times;
(e) describe the main components of an MRI scanner;
(f) outline the use of MRI (magnetic resonance imaging) to obtain
diagnostic information about internal organs;
(g) describe the advantages and disadvantages of MRI;
(h) describe the need for non-invasive techniques in diagnosis;
(i) explain what is meant by the Doppler effect;
(j) explain qualitatively how the Doppler effect can be used to
determine the speed of blood.
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OneInSolidarity
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I hate this unit. So so much content.
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anshul95
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(Original post by Oh my Ms. Coffey)
Did you notice in the book about the 'error' of how they define Non-invasive techniques on the spread?
no I didn't - someone I know who did medicine pointed this out to me when I asked her about something about CAT.
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random man5
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Jan 2011 paper and mark-scheme are here:
http://www.thestudentroom.co.uk/show....php?t=1597428

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sulexk
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(Original post by ChoYunEL)
A self assessment guide, given by my teacher.
If an endoscope comes up, I'll be thanking the poster. lol

5.4.2 Diagnosis methods in medicine
(a) describe the use of medical tracers like technetium-99m to
diagnose the function of organs;
(b) describe the main components of a gamma camera;
(c) describe the principles of positron emission tomography (PET);
(d) outline the principles of magnetic resonance, with reference to
precession of nuclei, Larmor frequency, resonance and relaxation
times;
(e) describe the main components of an MRI scanner;
(f) outline the use of MRI (magnetic resonance imaging) to obtain
diagnostic information about internal organs;
(g) describe the advantages and disadvantages of MRI;
(h) describe the need for non-invasive techniques in diagnosis;
(i) explain what is meant by the Doppler effect;
(j) explain qualitatively how the Doppler effect can be used to
determine the speed of blood.

Thank you for this - do you by any chance have self assessment guides for the other topics?

This is fantastic- I shall post responses to each task soon


Thank you!
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ChoYunEL
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I have a PDF of a self assessment guide..
I suppose I could copy and paste each area..
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Oh my Ms. Coffey
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Pretty much gone over all the questions in the book again just the space ones left to do tomorrow.

In terms of question difficulty I find it from hardest to least hardest;

Medical
Nuclear
Electricity
Space
Capacitors
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tomdebs
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(Original post by Oh my Ms. Coffey)
Did you notice in the book about the 'error' of how they define Non-invasive techniques on the spread?
how do you know its wrong? is there another book that defines it in a different way? sorry but we had an argument about this in class and my teacher finally conceded that the book may be right.
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Oh my Ms. Coffey
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(Original post by tomdebs)
how do you know its wrong? is there another book that defines it in a different way? sorry but we had an argument about this in class and my teacher finally conceded that the book may be right.
A) The examination question
B) Revision guide refers to X-ray as 'One kind of non-invasive technique'
C) The proper medical definition of a Non-invasive technique is ' Not penetrating the body, as by incision or injection: noninvasive surgery; a noninvasive diagnostic method.'
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magdaplaysbass
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does anyone know how the Earth's magnetic field protects us from the dangers of solar wind & cosmic particles? :confused:
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Pheylan
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(Original post by Oh my Ms. Coffey)
Pretty much gone over all the questions in the book again just the space ones left to do tomorrow.

In terms of question difficulty I find it from hardest to least hardest;

Medical
Nuclear
Electricity
Space
Capacitors
I'd say

Medical
Electromagnetism
Space
Nuclear
Capacitors

Spent most of today learning about space (star formation in particular), then looked at the January 2011 paper - three big questions on space, with 8 marks on the formation of stars. FML
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Oh my Ms. Coffey
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(Original post by Pheylan)
I'd say

Medical
Electromagnetism
Space
Nuclear
Capacitors

Spent most of today learning about space (star formation in particular), then looked at the January 2011 paper - three big questions on space, with 8 marks on the formation of stars. FML
Ha gutted, really doubt it will come up again. There was no Electromagnetism in that paper or MRI, my bets a big question on MRI/Ultrasound or how a nuclear power plant works.
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anshul95
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(Original post by Oh my Ms. Coffey)
Ha gutted, really doubt it will come up again. There was no Electromagnetism in that paper or MRI, my bets a big question on MRI/Ultrasound or how a nuclear power plant works.
Its just MRI seems so obvious now it might not be likely to come up. Nuclear power plant I think will come up they haven't been in past papers and I can definitely see a synoptic element in explaining explaining why moderators work/why they are made of a certain type of material.
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Oh my Ms. Coffey
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"Dear Joshua

Thank you for your email.

An invasive technique basically means surgery of some sort in which the skin is punctured or cut in order to see inside the body. A non-invasive technique is the complete opposite. It helps doctors to diagnose the problem without physically entering the body. Examples of non invasive techniques in the specification are: X-ray imaging, CAT scan, PET scan and MRI scan.

I hope this makes these techniques clearer.

Kind regards


Katrina Hart
Customer Contact Advisor"
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TobeTheHero
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(Original post by Oh my Ms. Coffey)
"Dear Joshua

Thank you for your email.

An invasive technique basically means surgery of some sort in which the skin is punctured or cut in order to see inside the body. A non-invasive technique is the complete opposite. It helps doctors to diagnose the problem without physically entering the body. Examples of non invasive techniques in the specification are: X-ray imaging, CAT scan, PET scan and MRI scan.

I hope this makes these techniques clearer.

Kind regards


Katrina Hart
Customer Contact Advisor"
lol did you email OCR?
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Oh my Ms. Coffey
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(Original post by TobeTheHero)
lol did you email OCR?
Yeah.
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TobeTheHero
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(Original post by Oh my Ms. Coffey)
Yeah.
you didn't really have to lol both terms are as clear as a whistle
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Oh my Ms. Coffey
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(Original post by TobeTheHero)
you didn't really have to lol both terms are as clear as a whistle
Actually, the spread on Non-invasive techniques defines it as a technique that does not involve Ionising radiation.
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tomdebs
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(Original post by Oh my Ms. Coffey)
"Dear Joshua

Thank you for your email.

An invasive technique basically means surgery of some sort in which the skin is punctured or cut in order to see inside the body. A non-invasive technique is the complete opposite. It helps doctors to diagnose the problem without physically entering the body. Examples of non invasive techniques in the specification are: X-ray imaging, CAT scan, PET scan and MRI scan.

I hope this makes these techniques clearer.

Kind regards


Katrina Hart
Customer Contact Advisor"
wow that settles it i guess...it begs the question why they had to mention the term non invasive tho...cuz that's pretty much all we learn
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anshul95
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(Original post by Oh my Ms. Coffey)
Actually, the spread on Non-invasive techniques defines it as a technique that does not involve Ionising radiation.
well I guess that it doesn't make a difference to the point being made - that MRI and ultrasound do not use ionising radiation, which is an advantage over CAT (and PET).
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