Abstract
Purpose
The authors compared biliary and pancreatic imaging obtained through 2D single-shot fast spin-echo (SSFSE), breath-hold 3D fast recovery fast spin-echo (FRFSE) and respiratory-triggered 3D FRFSE sequences.
Materials and methods
A total of 106 magnetic resonance cholangiopancreatography (MRCP) examinations performed between December 2007 and September 2008 were evaluated with a comparison of 2D SSFSE (thin section and thick slab), breath-hold 3D FRFSE and respiratory-triggered 3D FRFSE sequences. The biliary tract was divided into seven segments: right hepatic duct, left hepatic duct, common hepatic duct, cystic duct, common bile duct, cystic duct junction and biliarypancreatic confluence. The main pancreatic duct was divided into three segments (head, body and tail). Visualisation of biliary variants was also compared. Two blinded radiologists evaluated segment visibility using a quantitative scale. The Student’s t test for paired samples was used for statistical analysis.
Results
Compared with 2D SSFSE, respiratory-triggered 3D FRFSE sequences showed better visibility of the right hepatic duct (p=0.0277), the cystic duct (p=0.0081), the cystic duct junction (p=0.0010), the biliary-pancreatic confluence (p=0.0334) and biliary variants (p=0.0198). In the comparison between breath-hold 3D FRFSE and 2D SSFSE, a significant statistical difference was found in visualisation of the cystic duct (p=0.027), the cystic duct junction (p=0.020), the biliary-pancreatic confluence (p=0.0338) and biliary variants (p=0.0311).
Conclusions
Three-dimensional FRFSE offers a significant benefit over conventional 2D imaging.
Riassunto
Obiettivo
Scopo del nostro studio è stato confrontare l’imaging biliare e pancreatico mediante 2D single-shot fast spin-echo (SSFSE), 3D fast recovery fast spin-echo (FRFSE) breath-hold e 3D FRFSE triggerate.
Materiali e metodi
Centosei esami di colangiopancreatografia in risonanza magnetica (RM) — eseguiti tra dicembre 2007 e settembre 2008 — sono state analizzati confrontando SSFSE 2D (con spessore sottile e con slab), FRFSE 3D breath-hold e FRFSE 3D triggerate con il respiro. L’albero biliare è stato suddiviso in 7 segmenti: dotto destro, dotto sinistro, dotto epatico comune, dotto cistico, coledoco, inserzione cistico-coledocica e confluenza coledoco-pancreatica. Il dotto pancreatico è stato ripartito in 3 parti (testa, corpo e coda). È stata confrontata anche la visualizzazione di varianti biliari. Due radiologi in cieco hanno valutato la visibilità dei segmenti mediante una scala quantitativa; le analisi statistiche sono state effettuate mediante test t di Student per dati appaiati.
Risultati
Rispetto alle SSFSE 2D, FRFSE triggerate hanno evidenziato migliore visualizzazione dell’epatico destro (p=0,0277), del cistico (p=0,0081), della giunzione cistico-coledocica (p=0,0010) e delle varianti biliari (p=0,0198); nel confronto 3D FRFSE breath-hold versus SSFSE 2D, è stata rilevata differenza statisticamente significativa nella visualizzazione del cistico (p=0,027), del punto d’inserzione del cistico (p=0,020), della confluenza coledoco-pancreatica (p=0,0338) e delle varianti biliari (p=0,0311).
Conclusioni
FRFSE 3D rappresentano un importante valore aggiunto all’imaging convenzionale 2D.
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Palmucci, S., Mauro, L., Coppolino, M. et al. Evaluation of the biliary and pancreatic system with 2D SSFSE, breathhold 3D FRFSE and respiratory-triggered 3D FRFSE sequences. Radiol med 115, 467–482 (2010). https://doi.org/10.1007/s11547-010-0508-1
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DOI: https://doi.org/10.1007/s11547-010-0508-1