Virtual MR cholangiography.

Dubno, Benjamin; Debatin, Jörg F.; Luboldt, Wolfgang; Schmidt, Manuel; Hany, Thomas F.; Bauerfeind, Peter

doi:10.2214/ajr.171.6.9843286

Cited by 17 publications

(10 citation statements)

References 6 publications

(4 reference statements)

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“…Magnetic resonance cholangio‐pancreatography (MRCP) is performed with high resolution heavily T2‐weighted sequences to enhance the signal of stationary fluids in the biliary and pancreatic ducts without the use of contrast material or ionizing radiation 202–205. Multiple images are generated and reconstructed by a computer providing a three‐dimensional image of the bile ducts.…”

Section: Current Imaging Technologiesmentioning

confidence: 99%

Nonoperative imaging techniques in suspected biliary tract obstruction

Tse

Barkun

Romagnuolo

et al. 2006

HPB

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Evaluation of suspected biliary tract obstruction is a common clinical problem. Clinical data such as history, physical examination, and laboratory tests can accurately identify up to 90% of patients whose jaundice is caused by extrahepatic obstruction. However, complete assessment of extrahepatic obstruction often requires the use of various imaging modalities to confirm the presence, level, and cause of obstruction, and to aid in treatment plan. In the present summary, the literature on competing technologies including endoscopic retrograde cholangiopancreatography (ERCP), percutaneous transhepatic cholangiopancreatography (PTC), endoscopic ultrasound (EUS), intraductal ultrasonography (IDUS), magnetic resonance cholangiopancreatography (MRCP), helical CT (hCT) and helical CT cholangiography (hCTC) with regards to diagnostic performance characteristics, technical success, safety, and cost-effectiveness is reviewed. Patients with obstructive jaundice secondary to choledocholithiasis or pancreaticobiliary malignancies are the primary focus of this review. Algorithms for the management of suspected obstructive jaundice are put forward based on current evidence. Published data suggest an increasing role for EUS and other noninvasive imaging techniques such as MRCP, and hCT following an initial transabdominal ultrasound in the assessment of patients with suspected biliary obstruction to select candidates for surgery or therapeutic ERCP. The management of patients with a suspected pancreaticobiliary condition ultimately is dependent on local expertise, availability, cost, and the multidisciplinary collaboration between radiologists, surgeons, and gastroenterologists.

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Section: Current Imaging Technologiesmentioning

confidence: 99%

Nonoperative imaging techniques in suspected biliary tract obstruction

Tse

Barkun

Romagnuolo

et al. 2006

HPB

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“…High contrast between bile and ductal wall is mandatory for the generation of intraluminal images. Heavily T2-weighted images can fulfill this requirement, due to long T2 relaxation time of the bile, and they have been used in virtual and conventional MRC studies [8]. In the present work, a T1-weighted sequence was utilized in combination with the administration of a paramagnetic hepatobiliary contrast agent.…”

Section: Discussionmentioning

confidence: 99%

“…The biliary tree seems not to be a preferential area for virtual endoscopy, merely because of its relatively small lumen diameter. Only a few studies have appeared in the literature concerning virtual endoscopy of the pancreatobiliary tree based on CT [6] or heavily T2-weighted MR images [7,8].…”

Section: Introductionmentioning

confidence: 99%

Development of contrast-enhanced virtual MR cholangioscopy: a feasibility study

et al. 2002

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The purpose of this study was to examine the feasibility of contrast-enhanced virtual MR cholangioscopy (CE VMRC). Intraluminal views of the extrahepatic biliary tree were generated in ten patients undergoing abdominal MRI post mangafodipir trisodium administration employing coronal 2.5-mm 3D fast low-angle shot (FLASH) images (TR 6.8 ms, TE 2.3 ms, matrix 195 x 512) with fat saturation and a commercially available software. Contrast-enhanced VMRC was compared with single-shot turbo spin-echo T2-weighted MR cholangiography (T2 MRC) in terms of ductal visualization and artifact presence, utilizing a five-point grading scale. Four anatomic segments were evaluated: the intra- and extra-pancreatic segment of the common bile duct (CBD), and the cystic duct and the area of hepatic duct bifurcation. Both CE VMRC and T2 MRC depicted 38 of 40 segments. There were no significant differences between CE VMRC and T2 MRC in ranking ductal segments visualization ( p=0.27). The high contrast between intraluminal fluid and extraluminal tissues facilitated the generation of endoscopic views. Contrast-enhanced virtual MR cholangioscopy is a feasible technique providing endoscopic views of the CBD. Initial results show correlation of CE VMRC with projectional MR cholangiography.

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“…A CPRM teve sensibilidade de 89% e especificidade de 67%. Os achados mostram valores próximos de sensibilidade aos descritos na literatura em análise de grandes séries, variando de 85% a 100% (1,2,4,6,9,11,14,16,20,26,28) . Entretanto, os valores de especificidade observados no presente estudo, discordam dos apresentados por outros autores.…”

Section: Tabela 4 -unclassified