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  • 1
    Electronic Resource
    Electronic Resource
    MRI of Budd-Chiari syndrome (1994)
    Springer
    Abdominal imaging 19 (1994), S. 325-329 
    Details
    ISSN: 1432-0509
    Keywords: Budd-Chiari syndrome ; MR study ; Liver, MR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A retrospective study was undertaken to reassess the various magnetic resonance imaging (MRI) features of Budd-Chiari syndrome (BCS). MRI examinations of 22 patients with pathologically confirmed BCS were studied. Spin-echo (SE) T1- (TR = 300–450 ms/TE = 12–15 ms), and SE T2-weighted (TR = 1600–2000 ms/TE = 30–60/90–120 ms) MRI images were obtained in all patients. Gradient-recalled-echo (GRE) images (TR = 7–60 ms/TE = 3–19 ms, flip angle = 10–40°) were obtained in 14 patients. MRI showed thrombosis of three or two hepatic veins in 19 (86%) and 3 (14%) patients, respectively. Spontaneous intrahepatic anastomoses was depicted in five (23%) patients. Ascites appeared in 15 patients (68%). Thrombosis or external compression of the inferior vena cava (IVC) by an enlarged caudate lobe was depicted in six (27%) and five (23%) patients, respectively. Prominent azygos and hemiazygos veins were demonstrated in seven (32%) patients (six of whom had thrombosis of the IVC). MRI showed hepatomegaly in all patients and enlarged caudate lobe in 18 (82%) patients. SE T1- and SE T2-weighted MRI images revealed inhomogeneous signal intensity of hepatic parenchyma in 14 (64%) patients. SE T1- and SE T2-weighted MRI images showed homogeneous signal intensity of hepatic parenchyma in eight (36%) patients. Our results demonstrate that BCS displays various features on MRI images, and such information is important for diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198189
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  • 2
    Electronic Resource
    Electronic Resource
    Involvement of superior mesenteric vessels and portal vein in pancreatic adenocarcinoma: Detection with CT during arterial portography (1994)
    Springer
    Abdominal imaging 19 (1994), S. 413-416 
    Details
    ISSN: 1432-0509
    Keywords: Pancreas, carcinoma ; CT during arterial, portography ; Portal vein, angiographic study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A prospective study was designed to determine the utility of computed tomography (CT) during arterial portography (CTAP) in the detection of superior mesenteric vessels and portal vein involvement in patients with pancreatic adenocarcinoma. Eighteen patients with adenocarcinoma of the head of the pancreas and eight patients with benign pancreatic disease were investigated with CTAP, dynamic contrast-enhanced CT, and angiography. Appropriate review was made to determine presence or absence of superior mesenteric vessels and portal vein involvement. Final diagnosis was obtained in all cases by surgical explorations. The overall accuracy rate for detecting or excluding superior mesenteric vessels and portal vein involvement was 96% (25 of 26 patients) with CTAP, 88% (23 of 26 patients) with dynamic contrast-enhanced CT, and 85% (22 of 26 patients) with angiography. No statistically significant difference in accuracy was found among the three techniques. Our results suggest that the use of CTAP is not indicated in the preoperative detection of superior mesenteric vessels and portal vein involvement in patients with pancreatic adenocarcinoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206927
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  • 3
    Electronic Resource
    Electronic Resource
    Bile duct involvement in hepatocellular carcinoma: MR demonstration (1995)
    Springer
    Abdominal imaging 20 (1995), S. 118-121 
    Details
    ISSN: 1432-0509
    Keywords: Liver, MR study ; Hepatocellular carcinoma ; Bile ducts obstruction ; Bile ducts, MR studies ; Liver, neoplasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: To determine the magnetic resonance (MR) features of hepatocellular carcinoma (HCC) with associated bile duct involvement. Methods: MR examinations of six patients (mean age, 62 years) demonstrating bile duct involvement due to HCC were retrospectively reviewed and compared to surgical and pathologic findings. Results: Three of the tumors were solitary, and three were multifocal. In two patients, MR showed direct biliary duct invasion by tumor. On T1-weighted MR images, four tumors were hypointense compared to the liver and two were isointense. On T2-weighted MR images, four tumors were hyperintense, and two were isointense. The two tumors studied with dynamic T1-weighted MR images obtained after intravenous administration of a gadolinium chelate, displayed enhancement similar to that of the liver. There was no evidence of a tumor capsule on either unenhanced or enhanced MR images. Intrahepatic bile duct dilatation was seen in five patients. The extrahepatic bile duct was normal in all cases. Conclusion: Although rare, HCC should be included when considering the etiology of intrahepatic bile duct obstruction. Imaging features suggestive of the diagnosis by MR include intrabiliary tumor or bile duct obstruction with an associated hepatic mass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201517
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  • 4
    Electronic Resource
    Electronic Resource
    Hepatic pseudolesion around the falciform ligament: prevalence on CT examination (1996)
    Springer
    Abdominal imaging 21 (1996), S. 324-328 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Liver, neoplasms—Liver, CT studies—Liver, pseudolesions—CT, pitfalls.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: The purpose of this study was to determine the prevalence of hepatic pseudolesions seen around the falciform ligament on computed tomography (CT) of the abdomen obtained with intravenous administration of contrast material. Methods: We first retrospectively reviewed the CT scans of six patients in whom hepatic pseudolesions were seen around the falciform ligament. The abdominal CT scans of 587 patients were then prospectively analyzed for the presence of hepatic pseudolesions around the falciform ligament to determine the prevalence of this finding on CT examinations. Results: CT scans in the first six patients showed two types of hepatic pseudolesion around the falciform ligament. In three patients, hepatic pseudolesions were focal spared areas in fatty liver. In three patients, hepatic pseudolesions were developed in nonfatty liver. Prospectively, hepatic pseudolesions were found on five of 587 CT examinations (prevalence = 1%). A single hepatic pseudolesion was found in segment 4 on two examinations. Two hepatic pseudolesions (one in segment 4 and one in segment 3) were found together on three CT examinations. Conclusion: Hepatic pseudolesions around the falciform ligament are seldom seen on CT scan. However, recognition of these pseudolesions is crucial because they may be interpreted as true tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900073
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  • 5
    Electronic Resource
    Electronic Resource
    Hepatic metastases from leiomyosarcoma: MR features with histopathologic correlation (1997)
    Springer
    Abdominal imaging 22 (1997), S. 67 -71 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Leiomyosarcoma—Magnetic resonance imaging—Liver, neoplasms—Liver tumors, secondary. [xm [fs99]
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: To determine the magnetic resonance (MR) imaging features of hepatic metastases from leiomyosarcoma and determine the pathologic basis for the MR appearance of these neoplasms. Methods: MR examinations of eight patients with a total of 16 hepatic metastases from leiomyosarcoma were retrospectively reviewed. Hepatic metastases originated from a primary gastrointestinal (n = 6), uterine (n = 1), or retroperitoneal (n = 1) leiomyosarcoma. Correlation between MR features and pathologic findings was performed in 11 metastases from which histologic material was obtained. Results: Among the 10 metastases seen on T1-weighted MR images, nine were homogeneous and one was heterogeneous. The latter contained areas of necrosis and hemorrhage on pathologic examination. Among the 16 metastases seen on T2-weighted MR images, 12 were well delineated and completely homogeneous, with a marked hyperintense signal (``hemangiomalike'' pattern). These neoplasms were composed of smooth fibrous tissue without macroscopically visible areas of necrosis on pathologic examination. The remaining four metastases were heterogeneous and contained varying degrees of necrosis and hemorrhage or gelatinous tissue. Conclusion: A hemangiomalike pattern is the most common feature on T2-weighted MR images. We found that homogeneous hyperintensity of hepatic metastases from leiomyosarcoma on T2-weighted MR image does not reflect cystic changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900142
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  • 6
    Electronic Resource
    Electronic Resource
    Imaging features of nodular regenerative hyperplasia of the liver mimicking hepatic metastases (1999)
    Springer
    Abdominal imaging 24 (1999), S. 258-261 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Liver, neoplasms—Liver, magnetic resonance imaging—Liver, computed tomography.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We described the sonographic, computed tomographic (CT), and magnetic resonance (MR) imaging features of one atypical case of nodular regenerative hyperplasia of the liver. The presence of multiple hepatic nodules suggested the diagnosis of metastatic disease to the liver because of a peripheral rim of enhancement on CT obtained after intravenous administration of contrast material and a halo sign on T2-weighted spin-echo MR imaging. Examination of the pathologic specimen obtained after surgical biopsy showed that the nodules were made of hepatocytes, with a nodular arrangement surrounded by peliosis, without fibrosis or cirrhosis. These findings suggested that peliosis may cause peripheral rim of enhancement on CT and halo sign on MR imaging. In light of this case, nodular regenerative hyperplasia of the liver should be considered in the differential diagnosis of hepatic metastases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900491
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  • 7
    Electronic Resource
    Electronic Resource
    Carcinoid tumors of the abdomen: CT features (1999)
    Springer
    Abdominal imaging 24 (1999), S. 240-245 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Carcinoid tumors—Abdomen—Computed tomography.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Carcinoid tumors are rare neuroendocrine neoplasms that belong to a more general category of tumor called the APUDomas. Ninety percent of carcinoid tumors are located in the gastrointestinal tract. Abdominal carcinoid tumors are categorized according to the division of the primitive gut from which they arise. Carcinoid tumors originating from the foregut develop in the gastric wall, duodenum, and pancreas; those originating from the midgut develop from the small bowel, appendix, and right colon; and those originating from the hindgut develop from the transverse or left colon or from the rectum. This report illustrates the computed tomographic appearance of primary and metastatic carcinoid tumors of the abdomen. Among the different organs that may be involved by metastases from carcinoid tumor, special emphasis is placed on the liver.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900488
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  • 8
    Electronic Resource
    Electronic Resource
    Computed tomography of complications of lung transplantation (1997)
    Springer
    European radiology 7 (1997), S. 847-853 
    Details
    ISSN: 1432-1084
    Keywords: Key words: CT ; Lung transplantation ; CT helical technology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. In spite of improvements in single or double lung transplantation (LT) technique, complications after LT are not uncommon; the most frequent ale anastomotic complications, infections and rejection (acute or chronic). Early detection of complications of LT allows the optimal therapeutic option to be taken, yielding decreased morbidity and mortality. In some cases, CT plays a key role in early detection of several complications of LT that may not be depicted with other diagnostic modalities, so that knowledge of their CT features is important. In this pictorial review, the authors describe the spectrum of CT features of the complications of LT (including reimplantation response, mechanical problems, acute and chronic rejection, infection, lymphoproliferative disorders, recurrence of the initial disease and complications involving the pleura and the anastomotic sites). In addition, the authors analyze the value of CT compared to that of the other available modalities for the detection of complications of LT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050217
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  • 9
    Electronic Resource
    Electronic Resource
    Intraoperative and laparoscopic sonography of the liver (1997)
    Springer
    European radiology 7 (1997), S. 1296-1302 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Liver ; imaging studies ; Laparoscopy ; Intraoperative sonography ; Laparoscopic sonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Intraoperative sonography is an important aid in the decision making process during open surgery because it can detect additional small liver tumours that may not be depicted preoperatively, even with the use of modern non invasive imaging modalities. A continued important role of intraoperative sonography is to determine hepatic anatomy, allowing for safer and easier hepatic surgery with increased parenchymal preservation. Intraoperative sonography is also used for monitoring cryogenic ablation of hepatic tumour. To overcome the inherent limitations of laparoscopic surgery, laparoscopic sonography can now be used to provide information not available during laparoscopy or laparoscopic surgery alone. In this article, the authors present the most recent techniques for intraoperative sonography. Also they emphasize the important role of intraoperative sonography and laparoscopic sonography in the surgical decision-making process in patients with hepatic or biliary disease and report the most recent advances in intraoperative sonography with respect to the treatment of hepatic tumours. Finally, they try to look forward at the possible use for intraoperative technologies that are now in their early stages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050292
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  • 10
    Electronic Resource
    Electronic Resource
    Intrarenal pseudoaneurysm after percutaneous nephrostolithotomy: endovascular treatment with N-butyl-2-cyanoacrylate (2000)
    Springer
    European radiology 10 (2000), S. 1358-1358 
    Details
    ISSN: 1432-1084
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300000317
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