Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chp 11-Facial Bones
| Lateral facial bones: pt position | Upright or recumbent anterior oblique position |
| Lateral facial bones: part position | MSP of the head parallel with the IR Interpupillary line (IPL) perpendicular to IR Infraorbitameatal line (IOML) perpendicular to the front edge of the IR |
| Lateral facial bones: CR | Perpendicular to the center of IR Enters the lateral surface of the zygomatic bone halfway between the outer canthus and the external acoustic meatus (EAM) |
| Lateral facial bones: collimation/IR size | Exposure field: 6 x 10 inches Radiation field: 1 inch beyond the shadow of the tip of the nose, superiorly to 1 inch above the supraorbital margins, inferiorly to the gonion, and posteriorly to the EAM |
| Lateral facial bones: Structures shown | Lateral image of the facial bones, Right and left sides superimposed |
| Lateral facial bones: Evaluation criteria | Evidence of proper collimation and side marker All facial bones in entirety with zygomatic bone centered No rotation or tilt: Almost perfectly superimposed mandibular rami Superimposed orbital roofs Sella turcica in profile Soft tissue and bony tr |
| Parietoacanthial (Waters) facial bones: patient position | Prone or seated upright Center MSP to midline of upright bucky |
| Parietoacanthial (Waters) facial bones: part position | Rest head on tip of the extended chin Place the orbitomeatal line (OML) to form a 37-degree angle with the plane of IR Mentomeatal line (MML) perpendicular to IR Center IR to level of acanthion |
| Parietoacanthial (Waters) facial bones: CR | Perpendicular to exit acanthion |
| Parietoacanthial (Waters) facial bones: collimation/IR size | IR: 10 x 12 inches Exposure field: 8 x 10 inches Radiation field: 1 inch beyond the shadows of the lateral sides of the face, superiorly to include the supraorbital margins and inferiorly to the level of the chin |
| Parietoacanthial (Waters) facial bones: structures shown | Orbits, maxillae, and zygomatic arches |
| Parietoacanthial (Waters) facial bones: evaluation criteria | Evidence of proper collimation and side marker Entire orbits and facial bones No rotation or tilt: Distances between the lateral borders of the skull and the orbits MSP of head aligned with the long axis of the collimated field Petrous ridges pr |
| Modified Parietoacanthial (modified waters) facial bones: patient position | Prone or seated upright Centered MSP to midline of upright bucky |
| Modified Parietoacanthial (modified waters) facial bones: part position | Head positioned as described by waters method Neck is extended to a lesser degree OML adjusted to form a 55-degree angle with the IR |
| Modified Parietoacanthial (modified waters) facial bones: CR | Perpendicular to exit acanthion |
| Modified Parietoacanthial (modified waters) facial bones: structures shown/evaluation criteria | Facial bones with less axial angulation than waters method Petrous ridges projected just below the inferior border of the orbits at a level midway through the maxillary sinuses Orbital floor seen perpendicular to the IR and parallel to the CR Demonst |
| PA Axial (Caldwell) facial bones: patient position | Seated erect or prone MSP centered to midline Forehead and nose resting on table or upright bucky |
| PA Axial (Caldwell) facial bones: part position | Adjust flexion of neck to place OML perpendicular to IR plane Align MSP perpendicular to IR IR centered to nasion |
| PA Axial (Caldwell) facial bones: CR | Angled 15 degrees caudad To place petrous ridges below inferior orbital margin, increase CR angle to 30 degrees caudad Exits nasion |
| PA Axial (Caldwell) facial bones: collimation/IR size | Exposure field: 8 x 10 inches Radiation field: extends to 1 inch beyond the lateral sides of the face, superiorly to include the supraorbital margins and inferiorly to the chin |
| PA Axial (Caldwell) facial bones: structures shown | Orbital rims, maxillae, nasal septum, zygomatic bones, anterior nasal spine Petrous ridges in the lower third of orbits (15-degree caudal angle) Petrous ridges below the inferior margins of the orbits (30 degree caudal angle) |
| PA Axial (Caldwell) facial bones: evaluation criteria | Evidence of proper collimation and side marker Entire orbits and facial bones No rotation or tilt: Equal distances from the lateral borders of the skull to the lateral borders of orbits MSP of head aligned with long axis of collimated field Symmet |
| Lateral nasal bones: patient position | Upright or recumbent anterior oblique position MSP of the head horizontal |
| Lateral nasal bones: part position | Adjust the head to place MSP parallel with the tabletop IPL perpendicular to the tabletop Adjust the flexion of the neck to place IOML parallel with the transverse axis of IR |
| Lateral nasal bones: CR | Perpendicular to bridge of nose Enters at a point 1 inch (2.5 cm) distal to nasion |
| Lateral nasal bones: collimation/IR size | 10 x 12 inches crosswise for two exposures Exposure field: 3 x 3 inches Radiation field: extends from the glabella to 1 inch inferior to the acanthion and 1 inch beyond the tip of the nose |
| Lateral nasal bones: structures shown | Nasal bone and soft tissues of the nose Both sides for comparison |
| Lateral nasal bones: evaluation criteria | Evidence of proper collimation and side marker Nasal bones, anterior nasal spine, and frontonasal suture No rotation of nasal bones Soft tissue and bony trabecular |
| AP Axial:Mandible -patient position | OML or IOML perpendicular to IR |
| AP Axial:Mandible- CR | 35-degrees (OML) caudad 42-degrees (IOML) caudad Centered 1 inch superior to glabella |
| AP Axial:Mandible: evaluation criteria | Condyloid processes demonstrated and symmetric ,no rotation, optimal exposure factors |
| PA Mandibular rami- patient position | prone or seated upright facing vertical bucky |
| PA Mandibular rami-part position | Rest patient’s forehead and nose on IR OML perpendicular to IR plane MSP perpendicular to IR plane |
| PA Mandibular rami-CR | Perpendicular to exit acanthion Center IR and CR |
| PA Mandibular rami-collimation/IR size | Exposure field: 8 x 10 inches Radiation field: extend 1 inch beyond the lateral sides, above the TMJ’s and below the chin |
| PA Mandibular rami-structures shown | Mandibular body and rami Central part of body not well shown due to superimposed spine Shows medial or lateral displacement of fragments in fractures of the rami |
| PA Mandibular rami-evaluation criteria | Evidence of proper collimation and side marker Entire mandible No rotation or tilt: Symmetric mandibular body and rami MSP of head aligned with long axis of collimated field Soft tissue and bony trabecular |
| PA Mandibular body- patient position | prone or seated upright facing vertical bucky |
| PA Mandibular body- part position | Rest patient’s nose and chin on IR Anterior surface of the mandibular symphysis parallel to IR plane AML nearly perpendicular to the IR plane MSP perpendicular to IR |
| PA Mandibular body: CR | Perpendicular to level of the lips Center IR to CR |
| PA Mandibular body: collimation/IR size | Exposure field should be no larger than 8 x 10 inches Adjust radiation field to extend 1 inch beyond the lateral sides, above the TMJs, and below chin |
| PA Mandibular body: structures shown | Mandibular body |
| PA Mandibular body: evaluation criteria | Evidence of proper collimation and side marker Entire mandible No rotation or tilt: Symmetric mandibular body MSP of head aligned with long axis of collimated field Soft tissue and bony trabecular detail |
Created by:
npat00
Popular Radiology sets