lecture 4 QAQC

QAQC includes

• preventive maintenance

• quality control

• equipment calibration

• in service education

• evaluation of new products

Quality control

• process by product quality is compared with predefined standards and the action taken when nonconformance is detected

• used to improve quality

reasons for QAQC

• minimizes dose of radiation to patient and radiographer

• produces quality radiographs for accurate diagnosis

• reduces overall cost per exam by decreasing number of repeat exposures

Vet techs role

• do most of quality control testing, evaluate and recording data

Source image distance

• SID check

• SID smaller = density geater

• SID larger = density lesser

perpendicularity

• if the tube head is not perpendicular to the table the x ray beam will cause distortion to the image

Mirror displacement test

• light field/ x ray field alignment

• if the mirror is displaced, the lighted area seen on the patient is not the same as the radiation going in

PPE

• lead products will deteriorate over time causing them to harden and crack

• test regularly and log results

Apron

• at least 2 exposures (top and bottom)

• don’t need to do part that wraps around back

• use “R” to indicate lower right corner

Gloves

• can do both in one exposure

• get entire gloves

• indicate left and right with markers

thyroid collar

• can do multiple in one exposure

• use “R” to indicate right side

• don’t worry about back or collar

Goggles

lense needs to be facing tube head (place with arms in the air)