64 Slice MDCT Protocols: Cardiac Routine .33

Specific anatomic region

 Cardiac Routine (.33 sec)

Application

 Evaluate for anomalous coronary arteries

Author

Elliot K Fishman, MD

Reference Source

JHU Protocol

Scanner Used

Siemens Sensation 64

KV/Effective mAs/ Rotation time (sec)

 120/ 850 / .33

Detector Collimation (mm)

 .6

Slice thickness (mm)

 .75

Pitch

 .2

Kernel

 B20

Reconstruction interval

 .4 (for 10 series at 0-90%)

Image order (acquisition)

Cr-ca

Oral contrast

 N/A

IV contrast volume and type

 80 cc Visipaque 320 / 40 cc saline

Injection rate

 4cc/sec

Scan delay (sec)

 Test bolus + 6 sec delay time

3D technique used

 VRT/MIP

Comment:

  • We use InSpace for post processing. InSpace 2005A is ideal.
  • 3D mapping is required for optimal visualization of the coronary arteries. A combination of MIP and VRT is key.
  • 4D images are routinely reviewed to get the best sequence for each coronary artery.