IACs (last updated 10/28/2020, last reviewed 10/28/2020)
INDICATION: Hearing loss, acoustic neuroma.
SERIES
- Axial bone and soft tissue IACs 2mm
- Axial soft tissue brain C- and C+
- Coronal bone and soft tissue IACs 2mm
| | Brain C- | Brain C+ | IACs |
|
POSITION/MODE
|
supine/sequential |
supine/sequential |
supine/helical |
|
kV/mA/rot time
|
120kV/300 to 350 mA/
<1 sec |
120kV/300 to 350 mA/ <1 sec |
120kV/300 to 350 mA/ <1 sec |
|
DETECTOR COLL
|
12 x 1.5mm (S16) 12 x 1.2mm (D64) |
12 x 1.5mm (S16) 12 x 1.2mm (D64) |
6 x 0.75mm (S16) 16 x 0.3mm (D64) |
|
SLICE THICKNESS
|
4.5mm (S16) 4.8mm (D64) |
4.5mm (S16) 4.8mm (D64) |
2mm |
|
PITCH
|
1 to 1.5 |
1 to 1.5 |
0.85 (S16) 0.65 (D64) |
|
KERNAL
|
standard brain |
standard brain |
H80u very sharp (S16)
H75u very sharp (D64) |
|
SFOV
|
<25 cm |
<25 cm |
<25 cm |
|
COVERAGE
|
foramen magnum -> vertex |
foramen magnum -> vertex |
IACs |
|
ACQUISITION
|
caudocranial |
caudocranial |
caudocranial |
|
IV CONTRAST
|
none |
80 mL Isovue 300 |
(postcontrast) |
|
INJECTION RATE
|
---- |
2 mL/sec |
---- |
|
SCAN DELAY
|
---- |
30 to 60 sec |
immediately after brain |
|
POSTPROCESSING
|
axial brain |
axial brain |
axial soft tissue and bone |
Direct axial, reformatted coronals.