64 Slice MDCT Protocols: Head and Neck

Specific anatomic region

 Neck

Application

 R/O mass or nodes or abscess

Author

Elliot K Fishman, MD

Reference Source

JHU Protocol

Scanner Used

Siemens Sensation 64

KV/Effective mAs/ Rotation time (sec)

 120/ 200 / 1.0

Detector Collimation (mm)

 0.6

Slice thickness (mm)

 3mm and .75mm (for 3D)

Pitch

 0.9

Kernel

 B31f medium smotth + : Larynx window
B70s very sharp : Head Bone window

Reconstruction interval

 3mm x 3mm ST and Bone & .5mm (3D)

Image order (acquisition)

Cr-ca

Oral contrast

 N/A

IV contrast volume and type

 100-120 cc Omnipaque 350

Injection rate

 3.0-2.5 cc/sec

Scan delay (sec)

 Depends on patient, but in 30 sec range

3D technique used

 N/A

Comment:

  • If a mass is seen 3D mapping ca be done by reconstructing data at .75mm slice thickness and .5mm intervals.
  • Scan delay of minimum 30 seconds is needed to visualize both carotid artery and jugular vein.