Pag.
28
OPERATING INSTRUCTIONS
ORIX 70
incidence angle of central beam too horizontal.
13)
X-RAY WITH ANATOMICAL STRUCTURES OVER EXPOSED
cause: wrong x-ray technique
14)
BLURRED AND CROOKED IMAGES
cause: film bent during x-ray emission
15)
LIGHT AND TRANSPARENT SPOTS
cause: wrong manipulation
fixing drops have been sprayed before putting in bath - grease or oil on the x-ray film.
16)
LIGHT SPOTS
cause: wrong manipulation
x-ray films in contact with each other during development - air bubbles
17)
FINGER PRINTS
cause: wrong manipulation
finger prints left by oil fingers or fixing lotions.
18)
LIGHT SPOTS HALF MOON SHAPED
cause: wrong manipulation
scratches - claws - bending of x-ray film before exposure.
19)
DOUBLE IMAGE
cause: movement
the patient has moved.
20)
OVER EXPOSED PROXIMAL AREAS
cause: wrong set
main beam not orthogonal - incidence not perpendicular to the tangential plane of the examined
sector.
21)
DARK SPOTS
cause: wrong manipulation
drops of developing liquid before the procedure - drops of water on the x-ray film before
development
22)
DARK AREAS OR BANDS
cause: wrong manipulation
more x-ray films go in contact with each other - x-ray film go in contact with the edges of the
developer - fixing not occurred.
23)
BLACK RAMIFICATIONS OR POINTS
cause: electrostatic discharges
loading plane not suitable - humidity. - air too dry.
24)
VEILING AND SHORT CONTRAST
cause: wrong preservation
decayed film - x-ray film badly stored and preserved.
