374.True regarding
thermoluminescent dosimeters (TLD)
a.used to measure deep and shallow
dose
b. energy dependent response
c.overall sensitivity significantly better than film
d.much less susceptible to
environmental effects
e.relatively inexpensive
375.True regarding
thermoluminescent dosimeters (TLD)
a.no use of filters
b.can be reused for once
c.most common dosimeter used for
assessment of finger dose
d.can be read once
e.minimal energy dependence for
response
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365.Principle recommendations in the
Medical and Dental Guidance Notes is/are
a.leakage radiation from the tube
should be less than 1mGy/hr ata distance of 1m from the focus
b.the total filtration of the tube and
tube assembly should be less than the equivalent of 2.5mm of aluminium
c.the operator should stand at least 2
m from the tube
d.the housing and support plate for the
image intensifier should have shielding of at least 2 mm lead equivalence.
e.skin entrance dose rates should not
exceed 100 mGy /min
365.abcde---- (Chapter 2,page
no.35,second edition (2008),Farr’s Physics for Medical Imaging).
366.True regarding classified persons ----
a. are at no risk from ionization radiations
b.age 18 yrs or below
c.subject to dose monitoring
d.subjects to biennual health checks
e.health check-up records to be kept
for 50 yrs beyond the dates the individual stop working as a classified person
366.ce----Staffs designed as classified persons are at risk
from ionization radiations,are of age of 18 yrs or above and are
certified as being medically fit to work as a classified person (by doctor
appointed by HSE),are subject to dose monitoring and subjects to annual health check-up---- (Chapter
2,page no.34,second edition (2008),Farr’s Physics for Medical Imaging).
