according to SC35 what should the timer be set to at the beginning of an exam and why? what do you do w this info after the exam is over?
timer must be set to 0 so that it can indicate the amt of time the patient was under flouro and how long xrays were being emitted
record the amt of time patient was under fluoro
why do we want the IR to be as close to the patient as possible?
it makes the tube farther away, decreases backscatter, adn decreases patients skin entrance dose.
according to SC35, the focal spot to skin distance must not be less than ____ for mobile, and _____ for stationary equipment.
30cm
38cm
there is a safety feature built into the equipment to prevent the IR getting any closer
if youre using 100 kV, how much lead shielding do you need to prev scatter from getting to operator?
at least 25 mm Pb
can use a protective curtain or lead plexiglass from ceiling
what are the 4 things according to SC35 req for protection during fluoro procedures
1-all ppl in room must wear protective aprons
2-protective gloves should be worn by physician during palpation
3-carry out exams as quickly as possible
4-tech ensures all ppl in room as in proper protective equipment and positioned safety in room
on which side of the c arm has the highest amt of scatter? where should you stand
the xray tube side
side of IR
how should the c arm be positioned
IR over patient as close as possible to have the most amt of back scatter directed to the floor and decrease skin entrance dose
what is high level control (HLC)
improves img quality by reducing noise on img but requires an increase in kV and mA causing increase pat and staff dose.
how can the radiologist decrease radiation exposure
shorted exam time
take fewer images (decrease frame rate)
reduced use of continuous mode
always use last image hold
use HLC sparingly
