CT Triple Phase Abdomen - bartsradiology
CT Triple Phase Abdomen
(Conns Syndrome, Pancreas)
Indications
• Lesion seen on U/S
• ? Pancreatitis
• ? Neoplasm
• ? Conns
Preparation
• 4 hour fast
• 800mls Water prior to scan
• Pink (20Ga) cannula
• For Pancreas 20mg of Buscopan may be given
Technique
• Protocol – Triple Phase Abdomen
• Position – Feet first (supine), Arms up
• Zero – Xiphisternum
Coverage
• Pre contrast – Limit to area of interest
• Arterial Phase – Organ of interest
• Porto Venous Phase – Diaphragm to Iliac Crest
• 10 Min Delayed – through adrenals if required (Conns)
Scan
• Pre contrast through organ of interest
• Pre monitoring slice at the dome of diaphragm
• ROI on abdominal aorta and “Accept”
• 100mls@4mls/sec
• Monitoring – 8sec delay then scans every 2 sec.
• Scan starts automatically when 100HU reached. The scan can be started manually at any point
Recon jobs
Pre contrast
1. 5mm/ 5mm soft tissue axial
2. 1.5mm/ 1.2mm soft tissue axial
Arterial
1. 5mm/ 5mm soft tissue axial
2. 1.5mm/ 1.2mm soft tissue axial
3. 2mm/ 2mm soft tissue coronal
4. 10mm/ 5mm Coronal MIP
Porto Venous
1. 5mm/ 5mm soft tissue axial
2. 1.5mm/ 1.2mm soft tissue axial
3. 2mm/ 2mm soft tissue coronal
4. 1mm Lung axial
Additional Techniques
Conns Syndrome
• If a nodule is present, do 10min delay through the adrenal only
Triple Phase Abdomen + Chest, Abdo, Pelvis
• Protocol – Triple_Phase_ CAP
• Pre contrast abdomen
• Monitoring at diaphragm – triggers at 80HU
• Arterial Phase – Lung Apices to below organ of interest.
• Porto Venous at 65secs post contrast thru’ Abdomen and Pelvis
• 10min delay – adrenals (Conns)
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