1
|
Paro EDL, Puchnick A, Szejnfeld J, Goldman SM. Use of diffusion-weighted imaging in the noninvasive diagnostic of obstructed biliary ducts. Abdom Radiol (NY) 2021; 46:268-279. [PMID: 32666232 DOI: 10.1007/s00261-020-02636-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 06/22/2020] [Accepted: 07/04/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study sought to evaluate the role of diffusion-weighted imaging (DWI) in differentiation between obstructed and unobstructed bile ducts in patients undergoing magnetic resonance imaging (MRI). METHODS Eighty-four patients, 40 males and 44 females (mean age: 56.4 ± 15.1 years), undergoing MRI with DWI (0-50-500-700) were evaluated and divided into two groups: 58 with abnormal laboratory tests (obstructed group) and 26 with normal laboratory values (unobstructed group). Laboratory tests were total bilirubin, alkaline phosphatase, and gamma-glutamyltransferase. Median ADC values were calculated and correlated with laboratory tests and degree of bile-duct dilatation (absent, moderate, or severe). The persistence of signal on DWI (b500 and b700) in the biliary tract was evaluated. Bilirubin values were tested for correlation with bile-duct ADC values and persistence of b700 signal. For statistical analysis, Student t test, chi-square test and Wilcoxon-Mann-Whitney test were used. ADC maps were plotted for three levels of the biliary tree, and a receiver operating characteristic (ROC) curve was calculated. RESULTS In the obstructed group, 15 patients had severe dilatation, 24 had moderate dilatation, and 19 had no appreciable dilatation; 38 patients had persistent signal on b700 images. In the unobstructed group, 23 patients had no dilatation and 3 had moderate dilatation; 4 patients had persistent signal on b700 images. Correlation was found between degree of bile-duct dilatation, bilirubin levels, persistence of b700 signal, and ADC map values. The calculated ADC map cutoff value (353 10-6 mm2/s) was able to differentiate the obstructed and unobstructed groups with 92.3% sensitivity, 81% specificity, and 91.9% accuracy. CONCLUSIONS DWI is able to distinguish patients with obstructed versus unobstructed bile ducts, regardless of the degree of dilatation, correlating with clinical and laboratory findings.
Collapse
Affiliation(s)
- Eliane Donato Leite Paro
- Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 800, Vila Clementino, São Paulo, SP, 04024-002, Brazil.
| | - Andrea Puchnick
- Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 800, Vila Clementino, São Paulo, SP, 04024-002, Brazil
| | - Jacob Szejnfeld
- Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 800, Vila Clementino, São Paulo, SP, 04024-002, Brazil
| | - Suzan Menasce Goldman
- Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 800, Vila Clementino, São Paulo, SP, 04024-002, Brazil
| |
Collapse
|
2
|
Takahashi M, Takehara Y, Fujisaki K, Okuaki T, Fukuma Y, Tooyama N, Ichijo K, Amano T, Goshima S, Naganawa S. Three Dimensional Ultra-short Echo Time MRI Can Depict Cholesterol Components of Gallstones Bright. Magn Reson Med Sci 2020; 20:359-370. [PMID: 33390560 PMCID: PMC8922345 DOI: 10.2463/mrms.mp.2020-0009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Purpose Non-calcified cholesterol stones that are small in size are hard to be depicted on CT or magnetic resonance cholangiopancreatography. This institutional review board (IRB)-approved retrospective in vitro study aims to characterize contrast behaviors of 3 main components of the gallstones, i.e., cholesterol component (CC), bilirubin calcium component (BC) and CaCO3 (CO) on 3D radial scan with ultrashort TE (UTE) MRI, and to test the capability of depicting CC of gallstones as bright signals as compared to background saline. Methods Fourteen representative gallstones from 14 patients, including 15 CC, 6 BC and 4 CO, were enrolled. The gallstones underwent MRI including fat-saturated T1-weighted image (fs-T1WI) and UTE MRI with dual echoes. The contrast-to-noise ratio (CNR) and the chemical analysis for the 25 portions of the stones were compared. Results BC was bright on fs-T1WI, which did not change dramatically on UTE MRI and the signal did not remain on UTE subtraction image between dual echoes. Whereas the CC was negative or faintly positive signal on fs-T1WI, bright signal on UTE MRI and the contrast remained even higher on the UTE subtraction, which reflected their short T2 values. Median CNRs and standard errors of the segments on each imaging were as follows: on fs-T1WI, −10.2 ± 4.2 for CC, 149.7 ± 27.6 for BC and 37.9 ± 14.3 for CO; on UTE MRI first echo, 16.7 ± 3.3 for CC, 74.9 ± 21.3 for BC and 17.7 ± 8.4 for CO; on UTE subtraction image, 30.2 ±2.0 for CC, −11.2 ± 5.4 for BC and 17.8 ± 10.7 for CO. Linear correlations between CNRs and cholesterol concentrations were observed on fs-T1WI with r = −0.885, (P < 0.0001), UTE MRI first echo r = −0.524 (P = 0.0072) and UTE subtraction with r = 0.598 (P = 0.0016). Conclusion UTE MRI and UTE subtraction can depict CC bright.
Collapse
Affiliation(s)
| | - Yasuo Takehara
- Department of Fundamental Development for Advanced Low Invasive Diagnostic Imaging, Nagoya University Graduate School of Medicine
| | | | | | | | | | | | - Tomoyasu Amano
- Department of Radiological Technology, Seirei Mikatahara General Hospital
| | - Satoshi Goshima
- Department of Diagnostic Radiology & Nuclear Medicine, Hamamatsu University School of Medicine
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine
| |
Collapse
|
3
|
Fahlenkamp UL, Adams LC, Böker SM, Engel G, Huynh Anh M, Wagner M, Hamm B, Makowski MR. Feasibility of gadoxetate disodium enhanced 3D T1 MR cholangiography (MRC) with a specific inversion recovery prepulse for the assessment of the hepatobiliary system. PLoS One 2018; 13:e0203476. [PMID: 30183778 PMCID: PMC6124795 DOI: 10.1371/journal.pone.0203476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/21/2018] [Indexed: 11/30/2022] Open
Abstract
Aim To compare the potential of a gadoxetate disodium enhanced navigator-triggered 3D T1 magnetic-resonance cholangiography (MRC) sequence with a specific inversion recovery prepulse to T2-weighted MRCP for assessment of the hepatobiliary system. Materials and methods 30 patients (12 male, 18 female) prospectively underwent conventional navigator-triggered 3D turbo spin-echo T2-weighted MRCP and 3D T1 MRC with a specific inversion pulse to minimise signal from the liver 30 minutes after administration of gadoxetate disodium on a 1.5 T MRI system. For qualitative evaluation, biliary duct depiction was assessed segmentally following a 5-point Likert scale. Visualisation of hilar structures as well as image quality was recorded. Additionally, the extrahepatic bile ducts were assessed quantitatively by calculation of signal-to-noise ratios (SNR). Results The advantages of T1 3D MRC include reduced affection of image quality by bowel movement and robust depiction of the relative position of the extrahepatic bile ducts in relation to the portal vein and the duodenum compared to T2 MRCP. However, overall T1 3D MRC did not significantly (p > 0.05) improve the biliary duct depiction compared to T2 MRCP in all segments: Common bile duct 4.1 vs. 4.4, right hepatic duct 3.6 vs. 4.2, left hepatic duct 3.5 vs. 4.1. Image quality did not differ significantly (p > 0.05) between both sequences (3.6 vs. 3.5). SNR measurements for the hepatobiliary system did not differ significantly (p > 0.05) between navigator-triggered T1 3D MRC and T2 MRCP. Conclusions This preliminary study demonstrates that T1 3D MRC of a specific inversion recovery prepulse has potential to complement T2 MRCP, especially for the evaluation of liver structures close to the hilum in the diagnostic work-up of the biliary system in patients receiving gadoxetate disodium.
Collapse
Affiliation(s)
- Ute Lina Fahlenkamp
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- * E-mail:
| | | | - Sarah Maria Böker
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Günther Engel
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Minh Huynh Anh
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Moritz Wagner
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Bernd Hamm
- Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | |
Collapse
|
4
|
Nakayama T, Nishie A, Yoshiura T, Asayama Y, Ishigami K, Kakihara D, Obara M, Honda H. Balanced MR cholangiopancreatography with motion-sensitized driven-equilibrium (MSDE) preparation: Feasibility and optimization of imaging parameters. Magn Reson Imaging 2015; 33:1219-1223. [PMID: 26234501 DOI: 10.1016/j.mri.2015.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 07/16/2015] [Accepted: 07/19/2015] [Indexed: 01/26/2023]
Affiliation(s)
- Tomohiro Nakayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Akihiro Nishie
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Takashi Yoshiura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yoshiki Asayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kousei Ishigami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Daisuke Kakihara
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| | - Makoto Obara
- Philips Electronics Japan, 2-13-37 Konan, Minato-ku, Tokyo, 108-8507, Japan
| | - Hiroshi Honda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi Higashi-ku, Fukuoka, 812-8582, Japan
| |
Collapse
|
5
|
Abstract
Although ultrasound, computed tomography, and cholescintigraphy play essential roles in the evaluation of suspected biliary abnormalities, magnetic resonance (MR) imaging and MR cholangiopancreatography can be used to evaluate inconclusive findings and provide a comprehensive noninvasive assessment of the biliary tract and gallbladder. This article reviews standard MR and MR cholangiopancreatography techniques, clinical applications, and pitfalls. Normal biliary anatomy and variants are discussed, particularly as they pertain to preoperative planning. A spectrum of benign and malignant biliary processes is reviewed, emphasizing MR findings that aid in characterization.
Collapse
|
6
|
Ernst TM, Schwinge D, Raabe N, Daubmann A, Kaul MG, Adam G, Schramm C, Ittrich H. Imaging of the murine biliopancreatic tract at 7 tesla: Technique and results in a model of primary sclerosing cholangitis. J Magn Reson Imaging 2013; 40:1355-64. [DOI: 10.1002/jmri.24475] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 09/23/2013] [Indexed: 01/15/2023] Open
Affiliation(s)
- Thomas M. Ernst
- Department of Diagnostic and Interventional Radiology; University Medical Center Hamburg-Eppendorf; Germany
| | - Dorothee Schwinge
- I. Department of Internal Medicine; University Medical Center Hamburg-Eppendorf; Germany
| | - Nina Raabe
- Department of Diagnostic and Interventional Radiology; University Medical Center Hamburg-Eppendorf; Germany
| | - Anne Daubmann
- Department of Medical Biometry and Epidemiology; University Medical Center Hamburg-Eppendorf; Germany
| | - Michael G. Kaul
- Department of Diagnostic and Interventional Radiology; University Medical Center Hamburg-Eppendorf; Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology; University Medical Center Hamburg-Eppendorf; Germany
| | - Christoph Schramm
- I. Department of Internal Medicine; University Medical Center Hamburg-Eppendorf; Germany
| | - Harald Ittrich
- Department of Diagnostic and Interventional Radiology; University Medical Center Hamburg-Eppendorf; Germany
| |
Collapse
|
7
|
Shaikh F, Elazzazi M, Ryan A, Semelka RC. Debris-filled biliary system: a difficult diagnosis on MRI and MRCP. Clin Imaging 2012; 36:153-5. [PMID: 22370138 DOI: 10.1016/j.clinimag.2011.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 08/04/2011] [Indexed: 01/03/2023]
Abstract
We describe a debris-filled biliary system as a difficult diagnosis using magnetic resonance imaging and magnetic resonance cholangiopancreatography (MRCP). A male patient aged 60 years showed a nonvisualized biliary system due to complete filling with debris. The following imaging features were observed: mild heterogeneity of intermediate signal on T2-weighted, MRCP and T1-weighted images and mild heterogeneous enhancement of periportal tissue on early and late postcontrast images. The absence of simple-appearing bile on T2 or MRCP images made the diagnosis of dilated, debris-filled biliary system challenging.
Collapse
Affiliation(s)
- Faiq Shaikh
- Department of Radiology, University of North Carolina at Chapel Hill, 27599-7510, USA
| | | | | | | |
Collapse
|
8
|
Morita S, Ueno E, Saito N, Suzuki K, Machida H, Fujimura M, Maruyama K, Onodera Y, Watanabe K, Suzuki T, Ohnishi T, Imura C, Mitsuhashi N. Frequency of common bile duct motion artifacts caused by inferior vena cava pulsation on magnetic resonance cholangiopancreatography. Magn Reson Med Sci 2008; 7:31-6. [PMID: 18460846 DOI: 10.2463/mrms.7.31] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE We assessed the frequency of common bile duct (CBD) motion artifacts caused by inferior vena cava (IVC) pulsation on magnetic resonance cholangiopancreatography (MRCP). METHODS We retrospectively evaluated CBD motion artifacts in 4 MRCP sequences from each of 115 consecutive patients. RESULTS We observed 37 (32.2%) ghost artifacts at the ventral and dorsal aspects of the CBD on transaxial, half-Fourier acquisition single-shot turbo spin-echo (HASTE-ax) images; no such artifacts were observed on transaxial T(2)-weighted turbo spin-echo images. In 10 patients, we observed 9 (7.8%) pseudo-defects of the CBD on 3-dimensional T(2)-weighted turbo spin-echo with navigator-triggered prospective acquisition correction technique MRCP and 6 (5.2%) pseudo-defects on single-shot rapid acquisition with relaxation enhancement MRCP. Pseudo-defects were significantly more frequent in patients with ghost artifacts than without (9 of 37 [24.3%] versus one of 78 [1.3%]; P<0.01, McNemar test). CONCLUSION Although uncommon, pseudo-defects of the CBD caused by IVC pulsation are observed on MRCP. MRCP interpretation that includes comparison with HASTE-ax images can diminish the potential misinterpretation of such CBD motion artifact as bile duct tumor or biliary stone.
Collapse
Affiliation(s)
- Satoru Morita
- Department of Radiology, Tokyo Women's Medical University, Medical Center East, Tokyo, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Magnetic Resonance Cholangiopancreatography: Techniques and Applications. Magn Reson Imaging Clin N Am 2008; 16:453-66, v. [DOI: 10.1016/j.mric.2008.04.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
10
|
Attasaranya S, Fogel EL, Lehman GA. Choledocholithiasis, ascending cholangitis, and gallstone pancreatitis. Med Clin North Am 2008; 92:925-60, x. [PMID: 18570948 DOI: 10.1016/j.mcna.2008.03.001] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gallstone disease is encountered commonly in clinical practice. The diagnosis of biliary stones has become less problematic with current, less-invasive imaging methods. The relatively invasive endoscopic techniques should be reserved for therapy and not used for diagnosis. Acute cholangitis and gallstone pancreatitis are two major complications that require prompt recognition and timely intervention to limit morbidity and prevent mortality or recurrence. Appropriate noninvasive diagnostic studies, adequate monitoring/supportive care, and proper patient selection for invasive therapeutic procedures are elements of good clinical practice.
Collapse
Affiliation(s)
- Siriboon Attasaranya
- Division of Gastroenterology/Hepatology, Department of Medicine, Indiana University Medical Center, 550 N. University Boulevard, UH 4100, Indianapolis, IN 46202, USA
| | | | | |
Collapse
|
11
|
Chang KJ, Fayad LM. Magnetic Resonance Cholangiopancreatography. Cancer Imaging 2008. [DOI: 10.1016/b978-012374212-4.50115-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
12
|
Fernández-Esparrach G, Ginès A, Sánchez M, Pagés M, Pellisé M, Fernández-Cruz L, López-Boado MA, Quintó L, Navarro S, Sendino O, Cárdenas A, Ayuso C, Bordas JM, Llach J, Castells A. Comparison of endoscopic ultrasonography and magnetic resonance cholangiopancreatography in the diagnosis of pancreatobiliary diseases: a prospective study. Am J Gastroenterol 2007; 102:1632-9. [PMID: 17521400 DOI: 10.1111/j.1572-0241.2007.01333.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES To compare the diagnostic value of endoscopic ultrasonography (EUS) and magnetic resonance cholangiopancreatography (MRCP) in: (a) patients with a dilated biliary tree unexplained by ultrasonography (US) (group 1), and (b) the diagnosis of choledocholithiasis in patients with nondilated biliary tree (group 2). METHODS Patients were prospectively evaluated with EUS and MRCP. The gold standard used was surgery or EUS-FNA and ERCP, intraoperative cholangiography, or follow-up when EUS and/or MRCP disclosed or precluded malignancy, respectively. Likelihood ratios (LR) and pretest and post-test probabilities for the diagnosis of malignancy and choledocholithiasis were calculated. RESULTS A total of 159 patients met one of the inclusion criteria but 24 of them were excluded for different reasons. Thus, 135 patients constitute the study population. The most frequent diagnosis was choledocholithiasis (49% in group 1 and 42% in group 2, P= 0.380) and malignancy was more frequent in group 1 (35%vs 7%, respectively, P < 0.001). When EUS and MRCP diagnosed malignancy, its prevalence in our series (35%) increased up to 98% and 96%, respectively, whereas it decreased to 0% and 2.6% when EUS and MRCP precluded this diagnosis. In patients in group 2, when EUS and MRCP made a positive diagnosis of choledocholithiasis, its prevalence (42%) increased up to 78% and 92%, respectively, whereas it decreased to 6% and 9% when any pathologic finding was ruled out. CONCLUSIONS EUS and MRCP are extremely useful in diagnosing or excluding malignancy and choledocholithiasis in patients with dilated and nondilated biliary tree. Therefore, they are critical in the approach to the management of these patients.
Collapse
Affiliation(s)
- Glòria Fernández-Esparrach
- Gastroenterology Department, Institut de Malalties Digestives i Metabòliques, CIBER HEPAD, University of Barcelona, Barcelona, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Watanabe Y, Nagayama M, Okumura A, Amoh Y, Katsube T, Suga T, Koyama S, Nakatani K, Dodo Y. MR imaging of acute biliary disorders. Radiographics 2007; 27:477-95. [PMID: 17374864 DOI: 10.1148/rg.272055148] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
In patients with acute right-sided epigastric pain, jaundice, and a high fever, it is essential to accurately diagnose the cause of the symptoms, differentiate acute biliary disorders from nonbiliary disorders, and evaluate the severity of the disease. Gray-scale ultrasonography (US) and computed tomography (CT) are useful primary imaging modalities, but their results are not always conclusive. Magnetic resonance (MR) imaging, including MR cholangiopancreatography, can be a valuable complement to US and CT when additional information is needed. MR images have excellent tissue contrast and can provide more specific information, allowing diagnosis of complications that arise from acute cholecystitis, such as empyema, gangrenous cholecystitis, gallbladder perforation, enterocholecystic fistula, emphysematous cholecystitis, and hemorrhagic cholecystitis. In addition, causes of obstructive jaundice, acute suppurative cholangitis, and hemobilia can be clearly demonstrated with multisequence MR imaging. Single-section MR cholangiopancreatography and heavily T2-weighted imaging, in combination with fat-suppressed T1- and T2-weighted imaging, provide comprehensive and detailed information about the biliary system around the obstruction site, biliary calculi, inflammatory processes, purulent material, abscesses, gas, and hemorrhage. Contrast-enhanced MR imaging is useful for evaluation of the gallbladder wall; lack of enhancement and disruption of the wall may be findings specific for gangrenous cholecystitis and gallbladder perforation, respectively.
Collapse
Affiliation(s)
- Yuji Watanabe
- Department of Radiology, Kurashiki Central Hospital, 1-1-1 Miwa, Kurashiki 710-8602, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Verma D, Kapadia A, Eisen GM, Adler DG. EUS vs MRCP for detection of choledocholithiasis. Gastrointest Endosc 2006; 64:248-54. [PMID: 16860077 DOI: 10.1016/j.gie.2005.12.038] [Citation(s) in RCA: 184] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2005] [Accepted: 12/26/2005] [Indexed: 02/08/2023]
Abstract
BACKGROUND Numerous published studies have shown the high diagnostic performance of both EUS and MRCP compared with ERCP for the detection of choledocholithiasis. DESIGN We undertook a systematic review of all published randomized, prospective trials that compared EUS with MRCP with the primary aim being to compare the overall diagnostic accuracy for the detection of choledocholithiasis in patients with suspected biliary disease. METHODS A MEDLINE review was performed. We identified 5 randomized, prospective, blinded trials comparing MRCP and EUS for the detection of choledocholithiasis, with subsequent ERCP or intraoperative cholangiography as a criterion standard. The study-specific variables for EUS and MRCP for choledocholithiasis were calculated from the data, and analyses were performed by using aggregated variables (sensitivity, specificity, positive and negative predictive values, and likelihood ratios). RESULTS The pooled data set consisted of 301 patients. The aggregated sensitivities of EUS and MRCP for the detection of choledocholithiasis were 0.93 and 0.85, respectively, whereas their specificities were 0.96 and 0.93, respectively. The aggregated positive predictive values for EUS and MRCP were 0.93 and 0.87, respectively, with the corresponding negative predictive values of 0.96 and 0.92, respectively. Positive likelihood ratios were >10 for both tests, and corresponding negative likelihood ratios approached 0.10 for both tests. No statistically significant differences between EUS and MRCP were found in our analysis. CONCLUSIONS EUS and MRCP have high diagnostic performance overall. Our analysis showed no statistically significant difference between the modalities. We recommend taking into consideration other factors, such as resource availability, experience, and cost considerations in deciding between these 2 tests.
Collapse
Affiliation(s)
- Dharmendra Verma
- Department of Internal Medicine, University of Texas, Houston Health Science Center, Houston, TX 77030, USA
| | | | | | | |
Collapse
|
15
|
Merkle EM, Dale BM, Thomas J, Paulson EK. MR liver imaging and cholangiography in the presence of surgical metallic clips at 1.5 and 3 Tesla. Eur Radiol 2006; 16:2309-16. [PMID: 16703314 DOI: 10.1007/s00330-006-0234-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2005] [Revised: 02/08/2006] [Accepted: 03/03/2006] [Indexed: 11/25/2022]
Abstract
To evaluate whether clips from prior cholecystectomy impair image quality during magnetic resonance cholangiography (MRC) at 3 Tesla (T) compared with 1.5 T, surgical clips were embedded in a gel phantom and positioned at predefined distances from a fluid-filled tube designed to simulate the bile duct. The maximum clip distance was noted where susceptibility artifacts obscured the fluid-filled tube at 1.5 T and 3 T. Susceptibility artifact size was calculated for each sequence within each magnet class. In vivo analysis included 42 patients postcholecystectomy who underwent MRC at either 1.5 T or 3 T. In vitro, mean area of susceptibility artifacts was 104 mm2 on 3-T and 75 mm2 on 1.5-T MR imaging (MRI). While surgical clips within a 2-mm range impaired visualization of the fluid-filled tube on 1.5-T MRI, this range increased to 4 mm on 3-T MRI. In vivo, MRC image quality was impaired by susceptibility artifacts in three of 21 cases at 3 T and in two of 21 cases at 1.5 T. Overall, biliary pseudo-obstructions due to susceptibility artifacts from cholecystectomy surgical clips were not substantially more common on 3-T MRC in clinical practice, and patients with a history of prior cholecystectomy should not be excluded from a 3-T MRC.
Collapse
Affiliation(s)
- Elmar M Merkle
- Department of Radiology, Duke University Medical Center, Box 3808, Duke North--Room 1417, Erwin Road, Durham, NC, 27710, USA.
| | | | | | | |
Collapse
|
16
|
Persson A, Dahlström N, Smedby Ö, Brismar TB. Three-dimensional drip infusion CT cholangiography in patients with suspected obstructive biliary disease: a retrospective analysis of feasibility and adverse reaction to contrast material. BMC Med Imaging 2006; 6:1. [PMID: 16630362 PMCID: PMC1475834 DOI: 10.1186/1471-2342-6-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Accepted: 04/22/2006] [Indexed: 01/11/2023] Open
Abstract
Background Computed Tomography Cholangiography (CTC) is a fast and widely available alternative technique to visualise hepatobiliary disease in patients with an inconclusive ultrasound when MRI cannot be performed. The method has previously been relatively unknown and sparsely used, due to concerns about adverse reactions and about image quality in patients with impaired hepatic function and thus reduced contrast excretion. In this retrospective study, the feasibility and the frequency of adverse reactions of CTC when using a drip infusion scheme based on bilirubin levels were evaluated. Methods The medical records of patients who had undergone upper abdominal spiral CT with subsequent three-dimensional rendering of the biliary tract by means of CTC during seven years were retrospectively reviewed regarding serum bilirubin concentration, adverse reaction and presence of visible contrast media in the bile ducts at CT examination. In total, 153 consecutive examinations in 142 patients were reviewed. Results Contrast media was observed in the bile ducts at 144 examinations. In 110 examinations, the infusion time had been recorded in the medical records. Among these, 42 examinations had an elevated bilirubin value (>19 umol/L). There were nine patients without contrast excretion; 3 of which had a normal bilirubin value and 6 had an elevated value (25–133 umol/L). Two of the 153 examinations were inconclusive. One subject (0.7%) experienced a minor adverse reaction – a pricking sensation in the face. No other adverse effects were noted. Conclusion We conclude that drip infusion CTC with an infusion rate of the biliary contrast agent iotroxate governed by the serum bilirubin value is a feasible and safe alternative to MRC in patients with and without impaired biliary excretion. In this retrospective study the feasibility and the frequency of adverse reactions when using a drip infusion scheme based on bilirubin levels has been evaluated.
Collapse
Affiliation(s)
- A Persson
- Center for Medical Image Science and Visualization (CMIV), Linköping University Hospital, Sweden
| | - N Dahlström
- Department of Radiology, Hudiksvall Hospital, Sweden
| | - Ö Smedby
- Center for Medical Image Science and Visualization (CMIV), Linköping University Hospital, Sweden
| | - TB Brismar
- Division of Radiology, Karolinska Institutet, Sweden
| |
Collapse
|
17
|
Merkle EM. Pneumobilia: where to look for on hepatic MR imaging? Eur Radiol 2006; 16:2366-8. [PMID: 16391906 DOI: 10.1007/s00330-005-0050-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Revised: 09/14/2005] [Accepted: 09/30/2005] [Indexed: 10/25/2022]
Abstract
The presence of pneumobilia is a particular problem in magnetic resonance cholangiopancreatography (MRPC) and may create an appearance that can be mistaken for intraductal stones. Compared with biliary stones, however, pneumobilia causes a susceptibility artifact on hepatic MR imaging and appears as a signal void on a dual echo gradient MR sequence, such as the T1-weighted in-phase and opposed-phase gradient echo sequence. This susceptibility artifact is more pronounced on the gradient echo image with the longer echo time due to the continued decay of the transverse magnetization. Besides identification of hepatic steatosis, the double echo approach is particularly helpful in identification of pneumobilia.
Collapse
Affiliation(s)
- Elmar M Merkle
- Department of Radiology, Duke University Medical Center, Duke North, Room 1417 Erwin Road, P.O. Box 3808, Durham, NC, 27710, USA.
| |
Collapse
|
18
|
Tse F, Barkun JS, Romagnuolo J, Friedman G, Bornstein JD, Barkun AN. Nonoperative imaging techniques in suspected biliary tract obstruction. HPB (Oxford) 2006; 8:409-25. [PMID: 18333096 PMCID: PMC2020758 DOI: 10.1080/13651820600746867] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
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.
Collapse
Affiliation(s)
- Frances Tse
- Division of Gastroenterology, McMaster University Medical Centre, McMaster UniversityHamilton OntarioCanada
| | - Jeffrey S. Barkun
- Division of Gastroenterology, Montreal General Hospital and Royal Victoria Hospital Sites, McGill University Health CentreMontreal QuebecCanada
| | - Joseph Romagnuolo
- Division of Gastroenterology and Hepatology, Medical University of South CarolinaCharleston SCUSA
| | - Gad Friedman
- Division of Gastroenterology, Sir Mortimer B. Davis-Jewish General Hospital, McGill UniversityMontreal QuebecCanada
| | | | - Alan N Barkun
- Division of Gastroenterology, Montreal General Hospital and Royal Victoria Hospital Sites, McGill University Health CentreMontreal QuebecCanada
| |
Collapse
|
19
|
Izuishi K, Toyama Y, Wakabayashi H, Usuki H, Maeta H. Compression of the common hepatic duct by the right hepatic artery. Clin Imaging 2005; 29:342-4. [PMID: 16153541 DOI: 10.1016/j.clinimag.2005.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Revised: 01/15/2005] [Accepted: 01/24/2005] [Indexed: 10/25/2022]
Abstract
Magnetic resonance (MR) cholangiography has been used wildly as preoperative examination before laparoscopic cholecystectomy (LSC). However, cases that suggested the stenotic lesion of extrahepatic bile duct are not so rare in MR cholangiography. When stenosis is found, further examination is needed to avoid the possibility of bile duct cancer. We reported a case in which the stenotic lesion was diagnosed compression of the common hepatic duct by the right hepatic artery by multislice CT (MCT) cholangiography.
Collapse
Affiliation(s)
- Kunihiko Izuishi
- First Department of Surgery, Faculty of Medicine, Kagawa University 1750-1, Kagawa 761-0793, Japan.
| | | | | | | | | |
Collapse
|
20
|
Eracleous E, Genagritis M, Papanikolaou N, Kontou AM, Prassopoullos P, Chrysikopoulos H, Allan P, Gourtsoyiannis N. Complementary role of helical CT cholangiography to MR cholangiography in the evaluation of biliary function and kinetics. Eur Radiol 2005; 15:2130-9. [PMID: 15942732 DOI: 10.1007/s00330-005-2809-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2004] [Revised: 04/17/2005] [Accepted: 05/06/2005] [Indexed: 10/25/2022]
Abstract
To explore the potential role of computed tomographic cholangiography (CTC) in relation to magnetic resonance cholangiography (MRC) in cases in which knowledge of biliary kinetics and functional information are important for therapeutic decisions, 31 patients (14 men and 17 women) underwent MRC followed by CTC. We examined nine post-cholecystectomy cases with right upper quadrant abdominal pain, six cases with a previous biliary-enteric anastomosis and clinical evidence of cholangitis, eight biliary strictures with pain or symptoms of cholangitis, four cases with strong clinical evidence of sclerosing cholangitis, three cases with suspected post-laparoscopic cholecystectomy bile leakage, and one case with chronic pancreatitis and a common bile duct stent associated with cholangitis. In relation to MRC, CTC provided additional biliary functional information as follows: abnormal biliary drainage through the ampulla in 7/9 cholecystectomy cases, impaired drainage in 3/6 biliary-enteric anastomoses, and complete obstruction in 2/8 biliary strictures. CTC diagnosed early sclerosing cholangitis in 4/4 cases and confirmed suspected bile leakage in 1/3 post-laparoscopic cholecystectomy patients, and the patency of the biliary stent in the patient with chronic pancreatitis. Thus, CTC provides clinically important information about the function and kinetics of bile and complements findings obtained by MRC.
Collapse
Affiliation(s)
- Eleni Eracleous
- Department of Radiology, Diagnostic Center of Ayios Therissos, Nicosia, Cyprus.
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Abstract
MR imaging is an established technique for the diagnosis of a spectrum of biliary and gallbladder pathologies and continues to improve with the advent of technologic advances, including new contrast agents and new sequences that are capable of improving upon the contrast resolution and signal-to-noise that are afforded by conventional MR imaging. These improvements already have shown promise for the increasing role of MRC as the initial modality in assessing living liver donors and evaluating post-operative hepato-biliary complications. Improved spatial resolution and the added functional or physiologic information afforded by MR imaging promise ever expanding clinical applicability and usefulness.
Collapse
Affiliation(s)
- Samantha L Heller
- Department of Radiology, New York University Medical Center, 530 First Avenue, New York, NY 10016, USA
| | | |
Collapse
|
22
|
Tse F, Barkun JS, Barkun AN. The elective evaluation of patients with suspected choledocholithiasis undergoing laparoscopic cholecystectomy. Gastrointest Endosc 2004; 60:437-48. [PMID: 15332044 DOI: 10.1016/s0016-5107(04)01457-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Frances Tse
- Divisions of Gastroenterology and General Surgery, Montreal General Hospital and Royal Victoria Hospital Sites, McGill University Health Centre, 1650 Cedar Avenue, Montreal, Quebec, Canada H3G 1A4
| | | | | |
Collapse
|
23
|
Oyar O, Yesildag A, Gulsoy U, Sengul N, Isler M. Bilobed gallbladder diagnosed by oral cholecysto-CT. Comput Med Imaging Graph 2003; 27:315-9. [PMID: 12631517 DOI: 10.1016/s0895-6111(02)00023-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Morphological anomalies of the gallbladder are rare and are characterized by a large variety of configurations depending on the size and degree of fusion of the lobes, and on the number and position of the cystic ducts. We presented a case of bilobed gallbladder incidentally detected during abdominal ultrasonography. Oral cholecystography and computed tomographic examination after oral cholecystography (Oral Cholecysto-CT) were performed to confirm this abnormality. This is a quite rare anomaly consisted of complete duplication of the fundus and partially duplication of the corpus and separated lobes both of which entered a single infundibulum and cystic duct.
Collapse
Affiliation(s)
- Orhan Oyar
- Department of Radiology, School of Medicine, Suleyman Demirel University, 32100 Isparta, Turkey.
| | | | | | | | | |
Collapse
|
24
|
MacEneaney P, Mitchell MT, McDermott R. Update on magnetic resonance cholangiopancreatography. Gastroenterol Clin North Am 2002; 31:731-46. [PMID: 12481728 DOI: 10.1016/s0889-8553(02)00033-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
MRCP is a useful tool in the diagnosis of a wide variety of pathologic entities including congenital anomalies, biliary obstruction and stricture, biliary calculi, pancreatitis, neoplasms, and trauma. ERCP and MRCP both have important roles in the management of patients with suspected pancreaticobiliary disease. Knowledge of the advantages and disadvantages of each technique is needed to determine the appropriate work-up of patients with these pathologies.
Collapse
Affiliation(s)
- Peter MacEneaney
- University of Chicago Hospitals, Department of Radiology, MRI Section, 5841 South Maryland Ave./MC 2026, Chicago, IL 60615, USA.
| | | | | |
Collapse
|
25
|
Kim TK, Kim BS, Kim JH, Ha HK, Kim PN, Kim AY, Lee MG. Diagnosis of intrahepatic stones: superiority of MR cholangiopancreatography over endoscopic retrograde cholangiopancreatography. AJR Am J Roentgenol 2002; 179:429-34. [PMID: 12130445 DOI: 10.2214/ajr.179.2.1790429] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose of this study was to compare the efficacy of MR cholangiopancreatography (MRCP) and endoscopic retrograde cholangiopancreatography (ERCP) for the diagnosis of intrahepatic stones. MATERIALS AND METHODS Of the 318 patients who underwent MRCP examinations at our institution during an 18-month period, we identified 49 patients who subsequently underwent surgery or cholangioscopic stone removal with proof of intrahepatic stones. Thirty-four of these patients also underwent ERCP; they made up our study population. All images were interpreted for the presence of bile duct stones: MRCP images were interpreted independently by two reviewers, and ERCP studies were interpreted by one reviewer who was unaware of the MRCP findings. RESULTS The sensitivity and specificity of MRCP for detecting intrahepatic stones were 97% and 93%, respectively, whereas those of ERCP were 59% and 97%, respectively. MRCP showed a significantly higher sensitivity than ERCP in the diagnosis of intrahepatic stones (p < 0.001). We found no significant difference between MRCP and ERCP in sensitivity or specificity for detecting calculi in the common duct or gallbladder. CONCLUSION MRCP is a more effective diagnostic method than ERCP for the evaluation of intrahepatic stones.
Collapse
Affiliation(s)
- Tae Kyoung Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnab-dong, Songpa-ku, Seoul 138-736, Korea
| | | | | | | | | | | | | |
Collapse
|
26
|
Kalra M, Sahani D, Ahmad A, Saini S. The role of magnetic resonance cholangiopancreatography in patients with suspected biliary obstruction. Curr Gastroenterol Rep 2002; 4:160-6. [PMID: 11900682 DOI: 10.1007/s11894-002-0054-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Endoscopic retrograde cholangiopancreatography (ERCP) is an accepted and accurate procedure that combines the advantage of diagnosis of biliary obstruction with possible therapeutic endobiliary intervention. However, it is an operator-dependent and invasive procedure that is associated with complications and limitations. Magnetic resonance cholangiopancreatography (MRCP) is a unique noninvasive technique for the diagnosis of biliary obstruction. It is well suited to provide the information required to plan the optimal therapeutic approach for these patients. MRCP has the potential to replace or at least precede ERCP as the first-line imaging effort in the evaluation of suspected biliary obstruction. Significant advantages and some notable limitations inherent to the modality dictate its judicious use in appropriate circumstances. The present article reviews the utility of MRCP in evaluation of biliary obstruction, with brief reference to its principles and techniques.
Collapse
Affiliation(s)
- Mannudeep Kalra
- Department of Abdominal and Interventional Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | | | | | | |
Collapse
|
27
|
Abstract
T2-weighted imaging and MRCP, which have high sensitivity to edema and fluid, are paramount in the evaluation of certain gallbladder diseases, such as cholelithiasis, cholecystitis, adenomyomatosis, and cystic duct abnormalities. Dynamic gadolinium-enhanced MR imaging has the potential to differentiate among the many nonspecific-appearing lesions involving the gallbladder. MR imaging may not yet replace ultrasound as the workhorse of acute gallbladder imaging. Currently, MRCP is an ideal complementary study to inconclusive sonographic studies and can help plan surgical intervention in the setting of acute cholecystitis. Further investigation of hepatobiliary contrast agents, however, may reveal that MR imaging may be considered as first-line imaging in the acute setting.
Collapse
Affiliation(s)
- Saroja Adusumilli
- Department of Radiology, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania, USA
| | | |
Collapse
|
28
|
Khalid TR, Casillas VJ, Montalvo BM, Centeno R, Levi JU. Using MR cholangiopancreatography to evaluate iatrogenic bile duct injury. AJR Am J Roentgenol 2001; 177:1347-52. [PMID: 11717081 DOI: 10.2214/ajr.177.6.1771347] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE The purpose of this study was to assess the role of MR cholangiopancreatography (MRCP) in the evaluation of iatrogenic bile duct injuries. SUBJECTS AND METHODS In this prospective study, MRCP was performed in 10 postoperative patients (nine female and one male, ranging in age from 17 to 79 years) suspected of having bile duct injury as a result of surgery. Presence or absence of biliary dilatation, excision injury, stricture, fluid collection, and free fluid was noted. Excision injury was diagnosed if a segment of bile duct was not visible on any of the MRCP sequences. Positive cases were classified according to anatomic location and extent of injury. Results were compared with endoscopic retrograde cholangiopancreatography in five patients, percutaneous transhepatic cholangiography in one, surgery in four, and clinical follow-up in three. RESULTS Three patients had normal findings on MRCP and remained asymptomatic on clinical follow-up. Four patients had bile duct excision injury on MRCP that was surgically proven, and one had stricture, confirmed by percutaneous transhepatic cholangiography. Of these five patients, one had Bismuth type I injury, two had type II, one had type III, and one had type IV. Two patients had findings suggestive of cystic duct leak on MRCP that were confirmed on cholangiography. CONCLUSION MRCP can accurately diagnose postoperative biliary strictures and excision injuries and can characterize and anatomically classify these injuries for planning reparative surgery. It can also suggest the presence of cystic duct leaks in patients who have undergone cholecystectomy.
Collapse
Affiliation(s)
- T R Khalid
- Department of Radiology (R-109), University of Miami School of Medicine, Jackson Memorial Medical Center, 1611 N. W. 12th Ave, West Wing 279, Miami, FL 33136, USA
| | | | | | | | | |
Collapse
|
29
|
Yoshimitsu K, Honda H, Aibe H, Shinozaki K, Kuroiwa T, Irie H, Asayama Y, Masuda K. Radiologic diagnosis of adenomyomatosis of the gallbladder: comparative study among MRI, helical CT, and transabdominal US. J Comput Assist Tomogr 2001; 25:843-50. [PMID: 11711793 DOI: 10.1097/00004728-200111000-00003] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE The goal of this work was to evaluate the diagnostic accuracy of transabdominal ultrasound (US), helical CT, and MRI in the diagnosis of adenomyomatosis (ADM) of the gallbladder. METHOD Twenty patients with surgically proven ADM were included, all of whom underwent preoperative US, helical CT with 3 mm collimation, and MRI with half-Fourier rapid acquisition with relaxation enhancement (RARE). All images were retrospectively reviewed by two radiologists, and the presence of ADM was assessed at three compartments (neck, body, and fundus) of the organ. Receiver operating characteristic analysis was performed, and sensitivity, specificity, and accuracy were calculated for each modality. RESULTS The A z values (area under the curve) for MRI, helical CT, and US were 0.98, 0.85, and 0.72 for the Reader 1, respectively, showing no statistically significant interobserver difference in any of the three modalities. MRI showed a significantly higher A z value than helical CT or US (p < 0.1). The accuracies of MRI, helical CT, and US were 93, 75, and 66%, respectively. CONCLUSION Among the three modalities tested, MRI with half-Fourier RARE sequence was the most accurate for diagnosing ADM.
Collapse
Affiliation(s)
- K Yoshimitsu
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
30
|
|
31
|
Irie H, Honda H, Kuroiwa T, Yoshimitsu K, Aibe H, Shinozaki K, Masuda K. Pitfalls in MR cholangiopancreatographic interpretation. Radiographics 2001; 21:23-37. [PMID: 11158641 DOI: 10.1148/radiographics.21.1.g01ja0523] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Magnetic resonance (MR) cholangiopancreatography (MRCP) is widely used in the evaluation of pancreatobiliary disorders. However, numerous related pitfalls may simulate or mask pancreatobiliary disease. Maximum-intensity-projection (MIP) reconstructed images completely obscure small filling defects and may demonstrate respiratory motion artifacts. T2 weighting may vary with different MR imaging sequences and influence MRCP findings. Incomplete imaging may create confusion regarding ductal anatomy or disease. Furthermore, MRCP yields only static images and thus may fail to depict various anomalies. Limited spatial resolution makes differentiation between benign and malignant strictures with MRCP alone extremely difficult. Susceptibility artifacts may be caused by metallic foreign bodies or gastric-duodenal gas. Fluid accumulation may produce a pseudolesion or pseudostricture, although changing the imaging angle or section thickness may be helpful. Pneumobilia may be misinterpreted as bile duct stones, and true stones may be overlooked. Pulsatile vascular compression can cause pseudo-obstruction of the bile duct. Use of both source and MIP reconstructed images obtained from different angles can help avoid cystic duct-related pitfalls. Repeat MRCP or conventional MR imaging can help avoid pitfalls related to the periampullary region. Segmental collapse of the normal main pancreatic duct may be misinterpreted as stenosis, but administration of secretin is helpful. An awareness of these pitfalls and possible solutions is crucial for avoiding misinterpretation of MRCP images.
Collapse
Affiliation(s)
- H Irie
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | | | | | | | | | | | | |
Collapse
|
32
|
Soto JA, Alvarez O, Múnera F, Velez SM, Valencia J, Ramírez N. Diagnosing bile duct stones: comparison of unenhanced helical CT, oral contrast-enhanced CT cholangiography, and MR cholangiography. AJR Am J Roentgenol 2000; 175:1127-34. [PMID: 11000177 DOI: 10.2214/ajr.175.4.1751127] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE In this investigation we compared the diagnostic performance of unenhanced helical CT, oral contrast-enhanced CT cholangiography, and MR cholangiography for the diagnosis of choledocholithiasis. SUBJECTS AND METHODS Fifty-one patients referred for endoscopic retrograde cholangiography of suspected biliary stones were studied with unenhanced helical CT, MR cholangiography, and helical CT performed after oral administration of a cholangiographic contrast agent (iopodic acid). The studies were randomized for interpretation. Two radiologists evaluated the images by consensus and determined the presence and location of stones. We used retrograde cholangiography findings as the standard of reference. Sensitivity and specificity (with 95% confidence intervals [CIs]) of the three examinations were calculated and compared using the exact form of the McNemar test. RESULTS Bile duct stones were revealed with retrograde cholangiography in 26 patients (51%). Sensitivity was 65% (95% CI, 44.4-82%) for unenhanced helical CT, 92% (95% CI, 73-99%) for CT cholangiography, and 96% (95% CI, 78-99%) for MR cholangiography. Specificity was 84% (95% CI, 63-95%) for unenhanced helical CT, 92% (95% CI, 73-99%) for CT cholangiography, and 100% (95% CI, 83-100%) for MR cholangiography. The sensitivity of CT cholangiography and MR cholangiography was significantly higher than that of unenhanced helical CT (p<0.01). Differences in specificity were not significant. CONCLUSION Our results indicate that oral contrast-enhanced CT cholangiography and MR cholangiography are significantly more sensitive than unenhanced helical CT for the detection of bile duct calculi.
Collapse
Affiliation(s)
- J A Soto
- Department of Radiology, Universidad de Antioquia, Hospital Universitario San Vicente de Paúl, Calle 64 x Kra. 51D, Medellín, Colombia
| | | | | | | | | | | |
Collapse
|
33
|
Watanabe Y, Dohke M, Ishimori T, Amoh Y, Okumura A, Oda K, Hayashi T, Hiyama A, Dodo Y. Pseudo-obstruction of the extrahepatic bile duct due to artifact from arterial pulsatile compression: a diagnostic pitfall of MR cholangiopancreatography. Radiology 2000; 214:856-60. [PMID: 10715058 DOI: 10.1148/radiology.214.3.r00mr09856] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE To evaluate the frequency of artifact from arterial pulsatile compression as the cause of pseudo-obstruction of the extrahepatic bile duct at magnetic resonance (MR) cholangiopancreatography (MRCP) and specify the causative vessels. MATERIALS AND METHODS In 234 patients (102 men, 132 women; age range, 25-80 years), MRCP images obtained by using a single-shot turbo spin-echo sequence were reviewed to assess pseudo-obstruction of the extrahepatic bile duct caused by vascular compression. Dual-phase spiral computed tomography, contrast material-enhanced three-dimensional MR angiography, and/or digital subtraction angiography also were performed to determine the vessel that caused the pseudo-obstruction. RESULTS Thirty-six pseudo-obstructions due to vascular compression were found in 33 (14%) patients. The common hepatic duct (27 [75%] sites) was the most common pseudo-obstruction site, followed by the left hepatic duct (four [11%] sites), proximal common bile duct (three [8%] sites), and right hepatic duct (two [6%] sites). The causative vessels were identified as the right hepatic artery at 24 (67%) sites; gastroduodenal artery, two (6%) sites; cystic artery, two (6%) sites; proper hepatic artery, one (3%) site; and an unspecified branch of the common hepatic artery, seven (19%) sites. CONCLUSION At MRCP, pseudo-obstruction of the extrahepatic bile duct can be caused by pulsatile vascular compression of the hepatic and gastroduodenal arteries, and it should not be misdiagnosed as a bile duct tumor or biliary stone.
Collapse
Affiliation(s)
- Y Watanabe
- Department of Radiology, Kurashiki Central Hospital, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|