EBME Forums Forums Management Training OU question help needed..

Now I am not asking for answers here, but interpretations of the question

(a) Briefly describe how electron collisions with a material can produce X-rays, and state why characteristic X-rays depend on the material under bombardment.

do you think it should say 'produce x-ray images' or am i barking up the wrong tree?

Scott.

Hi Scott,

I would interpret the question as asking:

(a) Briefly describe how electron collisions with a material can produce (photons in the part of the electromagnetic spectrum known as) X-rays.......

Hi Scott

Basically the question is stated correctly

Its just trying to bring out your understanding of X Ray production by electron / target collision and the types of radiation produced, characteristic and others.

The production of actual images comes later

Good luck with the course

Darren

Yes, innocent trees are being pestered, I'm afraid.

The question is asking about the production of x-rays themselves, and does (need) not mention what use (if any) they are being put to.

The image can only be produced (as Darren suggests) - by whatever means - once the x-rays are available.

In the traditional (film-based) system ... where the radiation falls on the film emulsion, a few silver-bromide molecules in each grain are reduced to silver ... etc., etc.

I had better stop there, just in case that's the next question!

Well if you think of xrays as getting blocked by different densities of material. Bone, tissue and the lead glass/apron protection for staff.

Or (with regard to x-rays):-

1) Intensity is proportional to mA.
2) Penetration is proportional to kVp.
3) Film blackening is an indication of the amount of x-rays, which is proportional to mAs.

A bit like Ohm's Law ... that's "all you need to know"!

Plus:-

4) A totally transparent radiograph usually indicates that no exposure has taken place!

Thanks for that boys.
I had mislaid a book with it all in!

Downloaded said book and i'm on the right track now.

:-)

Care to name the book (or offer the link)?