​CT PEDIATRIC IAC TEMPORAL BONES

PEDIATRIC IAC/TEMPORAL BONES CT

Indication: Cholesteatoma, Hearing loss, Fracture

Position/Landmark

Supine, Head first/ OM

Scout direction

Craniocaudal

Respiration

None

Scan Type

Helical / Full

Statistics

​KV/ mA/ Rotation time (sec): 0-3 YRS ………….80kv / Smart mA (10-300) / 0.8 sec
Pitch/ Speed(mm/rotation): 3-6 YRS…….…...100KV / Smart mA (10-300) / 0.8 sec
Noise Index: 6-16 YRS……..…120kv / Smart mA (10-440) / 0.8sec

​Detector width x rows = Beam Collimation

0.625mm X 32 = 20mm

Slice Thickness/Spacing Algorithm/Recon

​Recon

1. BILAT IAC
2. RT IAC
3. LT IAC

​Thickness/spacing

0.625mm X 0.625mm
0.625mm X 0.312mm
0.625mm X 0.312mm

​Algorithm

Bone Plus
Bone Plus
Bone Plus

Angle

None

Location/FOV

​Start/End Location:                        Below the tip of the mastoid / to above the Temporal Bone
SFOV:                                                     0-6yr…PED Head
DFOV:                                                    6-16yr…Head                   
                                   Adjust DFOV to Pt size          Recon 1: BILAT IAC 16cm
                                                                   Recon 2: RT IAC 10cm
                                                                   Recon 3: LT IAC 10cm

​IV Contrast Volume/Type/Rate

75ml/ Isovue 370 / 2.5ml per sec
* Contrast only at Physician/Radiologist request.
Inquire with Radiologist prior to study

Scan Delay

40 sec

2D/3D

Coronal Reformations of both the RT & LT IAC using the Recon. 2 for the RT and 3 for the LT

Exam is to include all of the Petrous bone.

Images Required in PACS

Scouts, Bilat IAC images, RT & LT IAC images, Coronal RT & LT IAC images and the Dose Report.