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Radiography of eye
1. RADIOGRAPHY OF EYE
Ravi
RADIOLOGIC TECHNOLOGIST
Post graduate institute of medical
education and research
Chandigarh
BSc Radiology& Imaging
Indira Gandhi Medical College
Shimla (Himachal Pradesh)
7. IMAGE QUALITY
of supreme importance for detection and
localization of minute foreign particles
To improve image quality
Reduce geometric unsharpness
Use close OID
Use small focal spot
Use standard FFD
8. IMAGE QUALITY
Minimize secondary
radiation (use close
collimation)
Use immobilization
Immobilize head
Have the patient gaze steadily
at a fixed object so as to
immobilize eyeballs
Image receptors must be very clear as any artifact can simulate foreign body
(can have reserve image receptor for eye studies only)
10. LATERAL PROJECTION
Right or left
Use non grid technique to reduce
magnification and artifacts from radiographic
table and grid
11. LATERAL PROJECTION
SEMIPRONE OR ERECT
Affected eye
adjacent to
centre of
image
receptor
Midsagittal plane
of the patient
parallel to the
image receptor
Interpupillary line
perpendicular to
the image receptor
Exposure made in
suspended respiration
13. Evaluation criteria
Optimum density
and contrast for
visualization of
foreign body
Superimposition of
the orbital roof
Close beam restriction
LATERAL PROJECTION
14. PA AXIAL PROJECTION
Use non grid technique to reduce
magnification and artifacts from radiographic
table and grid
15. PA AXIAL PROJECTION
PATIENT POSITION
Patient’s head rests over
the image receptor
Radiographic base line
perpendicular to the
image receptor
Exposure made in suspended respiration
16. PA AXIAL PROJECTION
CENTRAL RAY
Through the centre of the orbits with
30 degree caudal angulation project
the petrous portion of the temporal
bone below inferior margin of orbits
Instruct the patient to
close eyes and concentrate
on holding them straight
17. PA AXIAL PROJECTION
EVALUATION CRITERIA
Petrous pyramids lying below
orbital shadow
No rotation of the cranium
Beam restriction centered to
orbital margins
19. PARIETOCANTHAL PROJECTION
(MODIFIED WATER’S VIEW)
PATIENT POSITION
Rest patient’s chin on
the image receptor
holder
Midsagittal plane
perpendicular to the
plane of image receptor
Adjust the flexon of the head
so that the radiographic base
line forms an angle of 50
degree with the image
receptor
Exposure made in suspended respiration
20. PARIETOCANTHAL PROJECTION
(MODIFIED WATER’S VIEW)
CENTRAL RAY
Perpendicular through the midorbits
Instruct the patient to close
eyes and concentrate on
holding them straight
21. Parietocanthal projection
(modified Water’s view)
Evaluation criteria
No rotation of the cranium
Beam restriction centered to
orbital margins
Petrous pyramids lying below
orbital shadow