64 Slice MDCT Protocols: Abdomen |
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Specific anatomic region |
Adrenal |
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Application |
Evaluate incidentaloma |
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Author |
Elliot K Fishman, MD |
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Reference Source |
JHU Protocol |
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Scanner Used |
Siemens Sensation 64 |
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KV/Effective mAs/ Rotation time (sec) |
120 / 250/ 0.5 |
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Detector Collimation (mm) |
0.6 |
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Slice thickness (mm) |
1- 3mm |
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Pitch |
0.75 |
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Kernel |
30 |
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Reconstruction interval |
1-3mm |
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Image order (acquisition) |
Cr-ca |
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Oral contrast |
1000 cc water |
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IV contrast volume and type |
Non contrast first and then IV if needed (see below) |
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Injection rate |
3-cc/sec (if used) |
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Scan delay (sec) |
For contrast 30 sec- 15 minutes |
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3D technique used |
Not routinely needed |
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Comment: 1. Do a noncontrast CT first and if attenuation under 10Hu and it is 4 cm or less it is an adenoma and you can stop. 2. If above 20Hu you can inject 100 cc of contrast and look at the washout value (check Hu at 1 minute and then at 5 thru 15 minutes to look for a 50% washout value).
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