Practical #3 Notes Flashcards
What IR do u use for AP Axial Townes?
- Medium IR
- Length Wise
- Upright Bucky
Patient position for AP Axial Townes:
- Patient seated upright
- Rest back of patient’s head on board
- Tuck Chin so OML is perpendicular to IR
- Ensure no rotation or tilt
What is the Central ray for AP Axial Townes for CRANIAL BONES:
- Directed @ MSP, 2.5” above the glabella through the level of EAM
- 30 degrees caudad (37 for IOML)
What collimation is used for AP Axial Townes for CRANIAL BONES:
Include 1” past skin lines, Mandible not that necessary to include
What IR do u use for PA Axial Caldwell?
- Medium IR
- Length wise
- Upright Bucky
Patient Position for PA Axial Caldwell:
- Patient seated upright
- Forehead and nose on IR
- Tuck chin to make OML perpendicular to IR
What is the CR for PA Axial Caldwell for Cranial Bones:
- Directed to exit the nasion
- 15 degrees caudad
What collimation is used for PA Axial Caldwell for Cranial bones:
- Include 1” past skin lines, Mandible not that necessary
What is the CR for PA Axial Caldwell for FACIAL BONES:
- 15 degrees caudad
- Exit the nasion
what collimation is used for PA axial caldwell for FACIAL BONES:L
- Longitudinally, include frontal sinus to bottom of maxillary sinus (at gonion usually)
- crosswise, include the lateral edges of the zygomatic bones
What is the CR for PA Axial Caldwell for Sinuses?
- PERPENDICULAR NO ANGLE
- Directed to exit the Nasion by TILTING PATIENT HEAD BACK 15 DEGREES
what collimation is used for PA Axial Caldwell for SINUSES?
- w/in 1” past sinus cavities, (16x16) including frontal sinus to maxillary sinus and laterally to include mid cheek bone
What is the CR for PA Axial Orbits?
- 30 degrees caudad exiting between orbits
what collimation is used for PA Axial Orbits?
- W/in 1” beyond all sides of the orbits
- 16x16
IR Will be crosswise
What IR is used for waters?
- Medium
- Length-wise
- upright bucky
Patient position for waters?
- seated upright
- elevate chin so MML perpendicular to IR
- Straighten head no rotation or tilt
What is the CR for waters for facial bones?
- Perpendicular to exit acanthion
What collimation for waters facial bones?
- Supraorbital margins to bottom of zygomatic arch lengthwise
- include lateral aspects of zygomatic bones crosswise
What is the CR for OPEN MOUTH waters for sinuses?
- Perpendicular to exit acanthion
- align MML perpendicular, then get patient to drop their jaw
What collimation for OPEN MOUTH waters for SINUSES?
- supraorbital margins to bottom of zygomatic arch lengthwise
- include lateral aspects of the zygomatic bones crosswise
What CR for waters for Nasal Bones:
- Perpendicular to exit acanthion
What collimation for waters nasal bones?
- Frontal sinus to gonion lengthwise
- Mid orbits crosswise
What IR is used for Lateral projection?
- Medium
- Crosswise
- Upright bucky
- affected side will be on the IR
What position is patient in for lateral projections
- Seated upright
- Affected side on IR
- IPL perpendicular to IR
- IOML perpendicular to edge of IR
- Turn torso to get patient as close and comfy to lateral against board
