Exams
Skull / Facial

Waters (Parietoacanthial)

1 default · 0 custom

Quick technique

kVp
75–85
mAs
20–30
SID
40 in
Grid
Yes
Detector
24x30 cm.
Breath
Suspend respiration.

Views

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Placeholder
Patient position
Erect or prone, facing IR.
Part position
Chin on IR, OML 37° to IR (mentomeatal line perpendicular).
Central ray
Perpendicular, exiting at acanthion.
IR placement
24x30 cm.

TechniqueDefault

kVp
75–85
mAs
20–30
SID
40 in
Grid
Yes
Breath
Suspend respiration.
Detector
24x30 cm.

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Anatomy coverage

Maxillary sinuses, orbits, zygomatic arches, nasal cavity.

Tech pearls

  • Open mouth Waters projects sphenoid sinus through open mouth.
  • Use a chair for upright Waters — better fluid level visualization.

Image evaluation

  • Petrous ridges just below maxillary sinuses
  • Symmetric facial bones

Common mistakes

  • Petrous ridges over maxillary sinuses (under-extension)
  • Asymmetric skull
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Facility custom views

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Anatomy overview

Maxillary sinusesOrbital floorZygomaNasal cavity
Open region anatomy atlas

Protocol controls

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