TEMPORAL BONES

INDICATIONS: WithOut: Cholesteatoma, tinnitus, hearing loss, otalgia, otitis media

With: Tumor, unable to have MRI

PATIENT PREP: WithOut: No Prep

With: NPO for solid foods, water only, for 4 hours prior to scan

IV CONTRAST: WithOut: None

With: 80mL Isovue 370 @ 2.0 mL/second.

ORAL CONTRAST: None

POSITIONING: Head First Supine. Position head to superimpose the base of the skull and acanthion.

TOPOGRAMS: Lateral

SCAN TYPE: Spiral/Helical

NOTES: Scan BilateralEars – Do Not Send Bilateral to Stentor. Reconstruct Each Ear Separately – Then Send Each Ear to Stentor.

If performing Temporal Bones With contrast, reconstruct Axials of each ear in Both Bone and Soft Tissue windows. Send Both the Bone and Soft

TissueAxials, withthe Coronal and Sagittal Bone Recons to stentor. If requested by the radiologist, performoptional recons in Soft Tissue.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

TEMPORAL BONES - WITHOUT

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Effective
mAs / kV / Collimator(mm)
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Top of petrous bone
through mastoid tips / Craniocaudal / Quiet
Respiration / 4 Seconds / OFF / 130 / 130 / Collimator: 0.6 mm
Slices Per Tube Rotation: 4 / Pitch: 0.45
Table Increment/Speed: 1.08 mm/rotation / 1.0
Seconds / 30
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON
Axial Bilateral Ears-Bone
DO NOT SEND TO STENTOR / Axial Bilateral Ears: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion
Use as Planning Base for Recons / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 18
cm
RECON
Axial Right Ear-Bone / Axial Right Ear: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Axial Left Ear-Bone / Axial Left Ear: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Coronal Right Ear-Bone / Coronals Right Ear: Mandibular condyles through mastoid.
Perpendicular to petrous bone / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Coronal Left Ear-Bone / Coronals Left Ear: Mandibular condyles through mastoid.
Perpendicular to petrous bone / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Sagittal Right Ear-Bone / Sagittals Right Ear: Auricle through Right Temporal Bone.
Straight Sagittal / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Sagittal Left Ear-Bone / Sagittals Left Ear: Auricle through Left Temporal Bone.
Straight Sagittal / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm

Page 1 of 2

TEMPORAL BONES - WITH

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Effective
mAs / kV / Collimator (mm)
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Top of petrous bone
through mastoid tips / Craniocaudal / Quiet
Respiration / 60 Seconds / OFF / 130 / 130 / Collimator: 0.6 mm
Slices Per Tube Rotation: 4 / Pitch: 0.45
Table Increment/Speed: 1.08 mm/rotation / 1.0
Seconds / 30
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON
Axial Bilateral Ears-Soft Tissue
DO NOT SEND TO STENTOR / Axial Bilateral Ears: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion
Use as Planning Base for Recons / 0.6 mm / 0.6 mm / U40u
Medium / Mediastinum
450/50 / 18
cm
RECON
Axial Right Ear-Soft Tissue / Axial Right Ear: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion / 0.6 mm / 0.6 mm / U40u
Medium / Mediastinum
450/50 / 9.6
cm
RECON
Axial Left Ear-Soft Tissue / Axial Left Ear: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion / 0.6 mm / 0.6 mm / U40u
Medium / Mediastinum
450/50 / 9.6
cm
RECON
Axial Right Ear-Bone / Axial Right Ear: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Axial Left Ear-Bone / Axial Left Ear: Top of petrous bonethrough mastoid tips.
Position patient to superimposebase of skull and acanthion / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Coronal Right Ear-Bone / Coronals Right Ear: Mandibular condyles through mastoid.
Perpendicular to petrous bone / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Coronal Left Ear-Bone / Coronals Left Ear: Mandibular condyles through mastoid.
Perpendicular to petrous bone. / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Sagittal Right Ear-Bone / Sagittals Right Ear: Auricle through Right Temporal Bone.
Straight Sagittal / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm
RECON
Sagittal Left Ear-Bone / Sagittals Left Ear: Auricle through Left Temporal Bone.
Straight Sagittal. / 0.6 mm / 0.6 mm / U70u
Sharp / Osteo
3000/300 / 9.6
cm

CHARGES:WithOut:CTEBO-

With:CTEBOW

With/WithOut:CTEBOWWO

NETWORK:Exam to PACS

6/2013Page 2 of 2