Radiography Recall 1 Flashcards
radiographic density
the more dense the tissue, the lighter it appears on xray
how do less dense tissues show up on xray?
darker
why do we measure for xrays?
because the thickness of the tissues determines how much xray needs to go through to make an image
how do you determine the risk of cancer from xray?
each exposure from each exam contributes to the lifetime radiation exposure of the patient
define radiographic positioning
the placement of the body or body part between the xray tube and the film or image receptor
CR
xray tube
IR
image receptor/film
What is the minimum amount of views you have to take?
2 opposing views
the two opposing views should preferably be how many degrees to each other?
90 degrees
define series in insurance terms
minimum amount of xrays for a complete exam
projection definition
the path of the xray beam as it enters and exits the body
view definition
the beam’s perspective
position definition
the placement of the body or part
describe lateral position for xray
coronal plane is perpendicular to the IR
which side do you refer to when taking a lateral xray?
the side touching the IR
describe oblique position for xray
body or part is rotated from normal anatomic position
what do you refer to when you take an image of the trunk oblique?
the surfaces touching the IR
what do you refer to when you take an image of the extremity oblique?
internal or external rotation from normal anatomic position
what are the different body positions you can be in for xray while standing or seated?
PA or AP oblique (RAO, RPO, LAO, LPO) lateral (L or R)
what are the different body positions you can be in for xray while prone or supine?
PA or AP oblique (RAO, RPO, LAO, LPO) lateral (L or R) decubitus
axial view
there is more than a 10 degree tilt between the part and the CR (tube is usually tilted)
tangential view
the CR is directed so it intersects an object at only one point on the surface (“Skimming” the body part)
decubitus view
patient is recumbent, CR is horizontal, IR is vertical
when are air fluid levels demonstrated?
on upright and decubitus views only
