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Secretin-Stimulated MRCP (Functional Pancreatic MRI)

Functional pancreatic imaging: secretin enhancement for ductal anatomy and exocrine function

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Radyoloji department. Book Appointment →

What is Secretin-Stimulated MRCP (Functional Pancreatic MRI)?

Secretin is a peptide hormone produced by duodenal S-cells that stimulates pancreatic ductal cells to secrete bicarbonate-rich fluid. IV synthetic human secretin (ChiRhoStim, 0.2 µg/kg) increases pancreatic juice flow ~10-fold, distending pancreatic ducts and enabling visualization of subtle anatomical variants and abnormalities.

Imaging protocol: standard pancreatic MRI (T2, T1, DWI) + dynamic MRCP series acquired at 1, 3, 5, 7, 9, 11, 13 minutes post-secretin. Duodenal filling is graded (Grade 0: no fluid; Grade 1: limited to bulb; Grade 2: to genu; Grade 3: beyond genu). Pancreatic exocrine function is assessed by duodenal filling volume and rate.

Clinical applications: chronic pancreatitis (early diagnosis when standard MRCP normal), pancreas divisum (improved detection 95% vs 50% standard), sphincter of Oddi dysfunction, pancreatic exocrine insufficiency, recurrent acute pancreatitis (etiology), suspected ampullary or branch duct IPMN, IgG4-related autoimmune pancreatitis, post-pancreatic surgery evaluation. Contraindications: acute pancreatitis (relative), severe renal failure (gadolinium concerns).

Symptoms

(S-MRCP is a diagnostic imaging technique, not a disease)
Performed for evaluation of:
Recurrent acute pancreatitis (search for etiology)
Suspected chronic pancreatitis with normal standard imaging
Pancreas divisum
Sphincter of Oddi dysfunction
Pancreatic exocrine insufficiency assessment
Pancreatic ductal anomalies
Ampullary or branch duct IPMN evaluation
Post-Whipple anatomy assessment

Risk Factors

Indications for S-MRCP:
Idiopathic recurrent pancreatitis (search for occult cause)
Suspected early/minimal-change chronic pancreatitis
Pancreatic divisum suspected on standard MRCP
Functional pancreatic disorder (SOD)
Steatorrhea, weight loss, suspected EPI
Pre-procedural anatomy mapping (ERCP, pancreaticoduodenectomy)
Contraindications: pregnancy, severe renal impairment, secretin allergy (rare)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • When standard MRCP is non-diagnostic for suspected pancreatic pathology
  • Recurrent pancreatitis without identified cause
  • Suspected pancreas divisum or anatomical variant
  • Chronic abdominal pain with normal CT/MRCP
  • Suspected exocrine pancreatic insufficiency
  • Pre-ERCP planning when standard MRCP equivocal
  • Suspected branch duct IPMN follow-up
  • Post-surgical pancreatic anatomy clarification

Treatment Methods

01
(S-MRCP is diagnostic — not therapeutic)
02
Patient preparation: 4-6 hours fasting, IV access
03
Pre-secretin MRI: T2 axial/coronal, T1 pre/post-contrast, DWI
04
Baseline MRCP (3D and 2D thick-slab)
05
IV secretin injection (0.2 µg/kg, 1-minute infusion)
06
Dynamic MRCP series: 1, 3, 5, 7, 9, 11, 13 minutes post-secretin
07
Duodenal filling assessment (Grade 0-3)
08
Pancreatic duct measurement (main duct diameter, side branches)
09
Detection of stenosis, stones, irregularity, dilatation
10
ADC measurement (DWI - chronic pancreatitis vs malignancy)
11
Adverse events: mild abdominal cramping (10%), transient hypotension (rare)
12
Combined with secretin function tests if EPI suspected
13
Reporting: ductal anatomy, function (filling grade), abnormalities

Which Department to Visit?

You can visit our Radyoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.