SCHOOL OF HEALTH SCIENCES SUBJECT AREA OF RADIOGRAPHY BSC HONS THERAPEUTIC RADIOGRAPHY LEVEL 2 / DIET 1

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SCHOOL OF HEALTH SCIENCES



SUBJECT AREA OF RADIOGRAPHY


BS
C

HONS THERAPEU
TIC RADIOGRAPHY


LEVEL 2

/ DIET 1


R201
3


RADIOTHERAPY PHYSICS AND EQUIPMENT







DATE
:

5 May 2010





TIME
:


9:30


10:35










DURATION
:

1 hour








READING TIME
:
5 minutes





INSTRUCTIONS
:




Candidates should attempt
FOUR

questions










PAPER SETTER:


DORA MEIKLE


FOUR questions to be attempted
.



1.

With reference to the two most significant radiation interaction


processes

with a radiotherapy department:



a)

State the name and energy range of each interaction

process;









2 marks



b)

Give an example of the type of machine where



each interaction would occur;







1 mark



c)

Explain the clinical relevance of
each.





7 marks





2.

List the functions of the simulator suite.






10 marks





3.


IR(ME)R 2000 regulations describe the role of specific

duty holders.


a)

Discuss each of the following roles:



(i)

referrer;







2 marks


(ii)

practitio
ner;







2 marks


(iii)

employer;







2 marks




(iv)

operator.







2 marks



b)

Indicate which role(s) can be undertaken by the

radiographer, and give an example to illustrate.




2 marks





4.

Collimation is the process whereby the
size of the effective radiation

beam is limited to required value. Using clinical examples explain

beam collimation under the following headings:


a)


asymmetric jaws;







3 marks























































b)


dynamic wedge;








4 marks


c)

multi
-
le
af collimation (MLC).







3 marks












5.

Percentage depth dose is a factor commonly employed in the planning


of radiotherapy treatments.



a)


Def
ine percentage depth dose.






2

mark
s




b)

State the parameter
that
percentage depth dose is

dependent upon and explain the implication of this.




3 marks




c)

List other

parameters whi
ch may affect percentage depth dose.


5

marks