​CTA HEAD

CTA HEAD

Indication: Stenosis of carotid/cerebral artery or aneurysm

Position/Landmark

Supine- Head first/ EAM

Scout direction

Cranio- Caudal

Respiration

NONE

Scan Type

Helical

Rotation/Pitch/Index

​KV/ mA/ Rotation time (sec): 120kv / (100-400) Smart mA / 0.8
Pitch/ Speed(mm/rotation): 0.969:1 / 19.37
Noise Index: 7.0

​Detector width x rows = Beam Collimation

0.625 X 32 = 20cm

Slice Thickness/Spacing Algorithm/Recon

​Recon

1. Thin cuts
2. CTA HEAD

​Thickness/spacing

0.625mm X 0.625mm
2.5mm X 2.5mm

​Algorithm

Standard (for DMPR)
Standard

Angle

NONE

​Location/FOV

​Start/End Location: Below base of head / through top of head
SFOV: Head
DFOV: 22cm

​IV Contrast Volume/Type/Rate 

100ml / Isovue 370 / 4.0ml / sec

Scan Delay

Smart prep @ level just below base of head.
Give a few seconds after identification of contrast on timing image.

2D/3D

2.5mm X 2.5mm Coronal & Sagittal reformations and Coronal & Sagittal MIPs.

Comments:

NA

Images Required in PACS

Scouts, 2.5mm CTA Head images, reformations, MIPs & Dose Report