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Skull & Sinus (125)
Skull & Sinus Procedures
| Question | Answer |
|---|---|
| Orbitomeatal line (OML) | From outer canthus to EAM |
| Infraorbitomeatal line (IOML) | From infraorbital margin to EAM |
| Glabellomeatal line (GML) | From glabella to EAM |
| Interpupillary line (IPL) | Perpendicular line between pupils of eyes |
| Acanthiomeatal line (AML) | From acanthion to EAM |
| Mentomeatal line (MML) | From mental point (center of chin) to EAM |
| What are Radiographic Positioning Guidelines are based on? | Mesocephalic skull size and shape |
| What may be required when working with patients with atypical skull shapes? | Adjustments to centering and central ray (CR) and/or part angulation |
| Skull Morphology- Mesocephalic Skull | Medium or average Skull |
| Skull Morphology- Brachycephalic Skull | Smaller anterior to posterior WIDER |
| Skull Morphology- Dolichocephalic Skull | Longer laterally MORE NARROW |
| Use_______________ for HYPERsthenic patients | Radiolucent support at head Prevents upward tilt of MSP |
| ____________ for HYPOsthenic/asthenic patients | Support chest to elevate cervical spine Prevents downward tilt of MSP |
| CR Enters 2 inches superior to EAM when performing a | Lateral Skull X-Ray |
| Angle the CR 15⁰ caudad when performing a? | PA axial Skull (Caldwell) |
| The CR should Exit at the ______ when performing a PA Skull & PA Axial Skull X-Ray | Nasion |
| The CR should enter 2 ½ inches above glabella (about hairline), exists through foramen magnum when performing a | AP Axial SKULL (Towne Method) |
| What CR angle ensures that the OML is perpendicular to IR when performing an AP Axial Skull (Towne Method) | 30 degrees caudal |
| What CR Angle ensures that the IOML is perpendicular to IR when performing an AP Axial Skull (Towne Method) | 37 degrees caudal |
| CR Positioning for SMV Skull & Sinus Projection (Schüller Method) | Enters MSP of throat between angles of mandible Through sella turcica perpendicular to IOML Passes through a point ¾ inch (1.9 cm) anterior to level of EAM |
| The CR Enters patient on lateral surface of zygomatic bone halfway between outer canthus and external acoustic meatus (EAM) | Lateral Facial Bones |
| Parietoacanthial (Waters) Facial Bones & Sinus CR Placement | Perpendicular to exit acanthion |
| Lateral Sinus Projection CR Placement | Enters ½ -1 inch posterior to outer canthus |
| OML forms a 15° angle with the IR when positioned for a | PA Axial SINUS (Caldwell) |
| Lateral Nasal Bones CR Placement | Perpendicular to bridge of nose Enters at a point ½ inch (1.3 cm) distal to nasion |
| Lateral Orbits CR Placement | Perpendicular at outer canthus |
| Waters is best for | Maxilary Sinus |
| Parietoacanthial (Waters) Patient Position | MML perpendicular to IR (OML) to form 37-degree angle with plane of IR |
| Orbits more oblong, petrous ridges below the maxillary sinuses. | Parietoacanthial Waters Position |
| Orbits more round, petrous ridges in the maxillary sinuses | Parietoacanthial Modified Waters Position |
| Modified Waters Patient Position | AML is perpendicular to the IR OML forms a 55° angle with the IR |
Created by:
user-2016295