共查询到20条相似文献,搜索用时 78 毫秒
1.
Magnetic resonance imaging of Crohn disease: early recognition of treatment response and relapse 总被引:6,自引:0,他引:6
Madsen S. M. Thomsen H. S. Munkholm P. Schlichting P. Davidsen B. 《Abdominal imaging》1997,22(2):164-166
A patient with active Crohn disease was evaluated by MRI at admission, clinical remission, and a new relapse. The MRI-estimated
disease extension correlated with surgical findings, whereas ultrasonography underestimated and a small bowel series overestimated
the extension. MRI disclosed the disappearance of intestinal edema at the time of clinical remission and, in contrast to ultrasonography,
showed an abscess and a fistula, confirmed by surgery, at the new relapse.
Received: 30 August 1995/Accepted: 20 September 1995 相似文献
2.
Focal nodular hyperplasia of the liver: serial MRI with Gd-DOTA,superparamagnetic iron oxide,and Gd-EOB-DTPA 总被引:2,自引:0,他引:2
Background: To demonstrate the improved specificity of liver MRI in diagnosis of focal nodular hyperplasia (FNH) using liver specific
contrast agents.
Methods: In a patient after resected adenosarcoma of the uterus a focal nodular hyperplasia was followed. Serial MRI of the liver
was performed using first Gd-DOTA, followed by superparamagnetic iron oxide (SPIO) as well as Gd-EOB-DTPA.
Results: During the follow-up of FNH specificity of liver MRI improved using liver specific contrast agents. The central scar as well
as the pseudocapsule showed different typical contrast uptake using all three methods.
Conclusion: Serial MRI of the liver with Gd-DOTA, SPIO and Gd-EOB-DTPA can exclude a malignant liver lesion. Liver biopsy of FNH can
be avoided with increased specificity of MRI for FNH.
Received: 15 December 1995/Accepted: 17 January 1996 相似文献
3.
A patient with a pelvic silicone prosthesis is presented. The sonographic and computed tomographic features in such patients
can be confusing and incorrectly interpreted unless the radiologist knows that the prosthesis had been inserted as a radioprotective
device.
Received: 3 October 1995/Accepted: 25 October 1995 相似文献
4.
A case of resolving hemorrhagic pancreatitis resulting in massive left perirenal fat necrosis is reported. CT revealed a
huge fat-containing mass that was thought to be retroperitoneal liposarcoma before operation. Pancreatitis with perirenal
involvement is rarely encountered as a retroperitoneal mass.
Received: 27 September 1995/Accepted: 25 October 1995 相似文献
5.
R. A. Huch Böni C. Meyenberger J. Pok Lundquist F. Trinkler U. Lütolf G. P. Krestin 《Abdominal imaging》1996,21(4):345-352
Background: To compare endorectal coil magnetic resonance imaging (MRI) with body coil MRI in detecting local recurrence of gynecologic
tumors and prostate and rectal cancers.
Methods: Forty-six patients with suspected recurrent pelvic malignancies (13 gynecologic, 15 prostatic, and 18 anorectal primaries)
were enrolled in the study. Axial T1- and T2-weighted body coil images and T2- and contrast-enhanced T1-weighted axial endorectal
coil images were obtained on a 1.5 T system. Results of the MR examinations were compared with histogical findings and follow-up
examinations with respect to the diagnostic accuracy and diagnostic confidence for assessment or exclusion of local recurrence.
Results: Recurrent disease was histologically confirmed in eight patients with primary gynecologic malignancies, seven with suspected
prostatic recurrence, and seven with suspected anorectal recurrence. Overall, accuracy of body coil MRI was 67% for gynecologic
tumors, 36% for prostatic recurrences, and 59% for rectal recurrences. T2- and contrast-enhanced T1-weighted endorectal sequences
yielded similar results, with an accuracy of 73% for depiction of gynecologic recurrence, 77% for prostatic recurrence, and
77% for rectal recurrence. The difference in accuracy between body coil and endorectal coil examinations was statistically
significant (p < 0.05) only for prostatic cancer. Diagnostic confidence was, however, significantly improved (p < 0.05) in all tumors (T2-weighted endorectal coil examination was superior to T2-weighted body coil images in 71% of cases).
Conclusion: Although the results of endorectal coil MRI are only slightly superior to those of body coil MRI for the detection of recurrent
gynecologic and anorectal tumors, diagnosis can be made with greater diagnostic confidence in many cases. For detection of
prostatic recurrence, endorectal MRI is highly recommended.
Received: 27 April 1995/Accepted: 17 June 1995 相似文献
6.
K. Kaneko H. Honda K. Kajiyama Y. Yokomizo N. Hashiguchi T. Fukuya Y. Tateshi T. Ro K. Masuda 《Abdominal imaging》1996,21(5):445-447
Background: Although intratumoral patent portal vein (ITPV) is one of the characteristic features of benign hepatic lesions, ITPVs can
be demonstrated in malignant tumors. We present the spectrum of MR and CT findings of ITPV identified in intrahepatic cholangiomas
with pathological correlations.
Methods: The ultrasound, CT and/or MRI findings of pathologically-confirmed intrahepatic cholangiomas were reviewed and correlated
with surgical specimen or autopsy findings.
Results: Intratumoral patent vessels were radiographically-demonstrated in 5 patients with intrahepatic cholangiomas. All intratumoral
vessels were secondary or tertiary order portal vein branches. Some wall thickening was identified on pathological examinations.
Conclusion: The radiological demonstration of intratumoral portal vein is not a specific sign of benignity. In the case of a hepatic
tumor with a patent portal tract, cholangioma should be considered, as well as benign tumors or lymphoma.
Received: 28 February 1995/Accepted: 29 March 1995 相似文献
7.
J. Farman G. Ramirez B. Rybak O. Lebwohl C. Semrad H. Rotterdam 《Abdominal imaging》1997,22(3):248-252
Sarcoidosis of the gastrointestinal tract is uncommon even though involvement of the liver, spleen, and adenopathy are becoming
recognizable entities on computed tomography (CT). Involvement of the stomach, the most common site of sarcoidosis of the
gastrointestinal tract, is usually associated with pulmonary disease. The radiologic appearances of gastric involvement are
variable. Positive biopsies may be obtained in a radiologically normal stomach. Ulceration resembling peptic ulcer disease
may occur, and mucosal enlargement may be minor, diffusely nodular, or significant enough to mimic Menetrier disease. In its
most dramatic form, a linitis plastica appearance resembling scirrhous carcinoma has been reported.
Received: 10 October 1995/Accepted after revision: 31 January 1996 相似文献
8.
Within a period of 5 years, we followed by computed tomography (CT) three patients with Crohn disease who were undergoing
treatment. From the spectrum of disease abnormalities, some subsided and others remained. Bowel wall thickening was the most
common pretreatment CT finding but was somewhat altered after treatment.
Received: 10 October 1995/Accepted after revision: 3 January 1996 相似文献
9.
S. H. Cha C. M. Park I. H. Cha H. J. Kim D. H. Lee S. Y. Baek P. N. Kim H. K. Ha 《Abdominal imaging》1998,23(2):154-157
US, portal venous phase CT, and MRI-CSE (MRI with conventional spin-echo sequence) findings in three cases of hepatic involvement
in hypereosinophilic syndrome are presented. These showed varied imaging findings, but portal venous phase CT showed multiple,
poorly marginated, and hypodense hepatic lesions in all three cases. The result suggested that portal venous phase CT is the
optimal method for depicting hepatic involvement.
Received: 16 January 1996/Accepted: 30 October 1996 相似文献
10.
M. Mori T. Fukuda K. Nagayoshi S. Kohzaki N. Matsunaga K. Hayashi K. Motojima T. Kanematsu 《Abdominal imaging》1996,21(4):337-341
We studied the value of short-TI inversion-recovery (STIR) imaging for the localization of pancreatic insulinoma. Four patients
(three women and one man aged 35–65 years) with surgically proven insulinoma were included in this study. All patients were
examined by MR imaging with spin echo (SE) and STIR sequences. The STIR images were compared with the histopathologic findings
in each case. In two patients, the tumors were markedly hyperintense on STIR images, and a 5-mm insulinoma was depicted only
by this imaging method in one of the two. In the other two patients, 10-mm insulinomas were only slightly hyperintense on
STIR images. The latter tumors had a higher content of collagen fibers than the former, indicating that the amount of collagen
influences the signal intensity of insulinoma. Despite some limitations, STIR imaging is a useful noninvasive method for the
localization of pancreatic insulinoma.
Received: 11 October 1994/Accepted after revision: 10 April 1995 相似文献
11.
Preoperative assessment of local tumor extent in advanced rectal cancer: CT or high-resolution MRI? 总被引:10,自引:0,他引:10
Beets-Tan RG Beets GL Borstlap AC Oei TK Teune TM von Meyenfeldt MF van Engelshoven JM 《Abdominal imaging》2000,25(5):533-541
Background: We compared high-resolution magnetic resonance imaging (MRI) with computed tomography (CT) in the assessment of tumor infiltration
in surrounding structures for locally advanced primary and recurrent rectal cancer.
Methods: Twenty-six patients with operable, locally advanced rectal cancer (15 recurrent and 11 primary) were evaluated with conventional
pelvic CT and 1.5-T high-resolution MRI with a quadrature phased-array coil. The images were scored for invasion of nine neighboring
pelvic structures, and the results were compared with surgical and histologic findings.
Results: A total of 234 structures in 26 patients was evaluated for tumor invasion. For MRI the, sensitivity was 97% and the specificity
98%; for CT, the sensitivity was 70% and the specificity was 85%. The difference in performance was statistically significant
(p < 0.001). The failure most frequently made on CT was the false-positive prediction of pelvic floor and piriform muscle invasion
(14), whereas MRI showed only four false-positive predictions. MRI correctly predicted all four cases of sacral bone invasion,
three of which were missed by CT. MRI was accurate in 20 patients (80%) and CT in only five patients (19%).
Conclusion: High-resolution MRI using a quadrature phased-array coil is highly accurate and superior to CT in predicting tumor infiltration
in surrounding structures for locally advanced primary or recurrent rectal cancer and is recommended in the preoperative work-up
of these tumors.
Received: 21 September 1999/Revision accepted: 26 January 2000 相似文献
12.
Transjugular retrograde obliteration for gastric varices 总被引:6,自引:0,他引:6
We evaluated the transjugular retrograde obliteration (TJO) in treatment of gastric varices with gastrorenal shunt. Twenty
patients with posthepatitic cirrhosis were included in this study. A cobra-shaped 5 French occlusive balloon catheter was
inserted into the gastric varices or gastrorenal shunt through the internal jugular vein. As the sclerosants, absolute ethanol
and 5% ethanolamine oleate with iopamidol were injected into the varices to make thrombi. In all cases, gastric varices were
obliterated successfully. Endoscopic examination 3 months after treatment revealed the complete eradication of gastric varices
in all cases. No major complications during or after therapy were observed. We think that TJO can be an effective method for
the treatment of gastric varices with gastrorenal shunt.
Received: 21 October 1994/Accepted after revision: 7 February 1995 相似文献
13.
High resolution MRI of anorectal malformation in the newborn: case reports of Currarino syndrome and anocutaneous fistula 总被引:1,自引:0,他引:1
To show the accuracy of a high-resolution magnetic resonance imaging (MRI) technique with a phased array coil in diagnosing
anorectal malformation, we present two neonates with Currarino syndrome and anocutaneous fistula, respectively. Anatomy was
visualized correctly with this technique, but conventional MRI did not show the complete extent of the disease. The reported
high-resolution MRI findings concerning these conditions are scanty.
Received: 26 March 2001/Accepted: 2 May 2001 相似文献
14.
K. Ishigami K. Yoshimitsu H. Honda K. Kaneko T. Kuroiwa H. Irie T. Tajima K. Makizumi T. Kamura T. Shigematsu K. Masuda 《Abdominal imaging》1998,23(2):214-216
A case of uterine lipoleiomyoma demonstrated on computed tomography (CT) and magnetic resonance imaging (MRI) is described
and usefulness of MRI is discussed in diagnosing this entity.
Received: 28 June 1996/Accepted: 25 July 1996 相似文献
15.
CT and MR findings of torsion of greater omentum: a case report 总被引:1,自引:0,他引:1
We report a case of torsion of the greater omentum, which occurred in a 39-year-old man with an adhesive inguinal hernia.
Preoperative computed tomography and magnetic resonance (MR) imaging showed a characteristic whirling fatty mass occupying
the middle and lower abdomen anteriorly. MR imaging also showed difference of intensities in the twisted omentum, suggesting
the presence of the pathological conditions of edema or congestion.
Received: 25 May 1995/Accepted: 12 July 1995 相似文献
16.
Five cases of intestinal herniation through the torn diaphragm are presented. Plain radiography, single-contrast examination,
and ultrasonography show some simple features that either have not been previously published or need restatement. Some pitfalls
that still delay diagnosis are also shown.
Received: 28 March 1995/Accepted: 4 May 1995 相似文献
17.
Infected aortic aneurysm is an uncommon, life-threatening disease. Early surgical treatment is crucial to survival. An early
diagnosis could be made on CT in suspected cases, although CT features of infectious aortitis overlap with retroperitoneal
fibrosis, hemorrhage, and lymphadenopathy. We report the case of an infected abdominal aortic aneurysm and describe the additional
potentially useful CT finding of early infectious aortitis, which helps localize the abnormality to the aortic wall.
Received: 7 August 1995/Accepted: 12 September 1995 相似文献
18.
Background: Primary carcinoids are found mostly in the gastrointestinal tract. Primary carcinoid tumor of the kidney is rare; only 28
patients have been reported. Because of the rarity of the lesion, its radiological and clinicopathological features are not
well characterized. At the same time, its prognosis and histogenesis is unknown.
Methods: A 62-year-old patient presented with a carcinoid tumor on the isthmus of the horseshoe kidney. Radiological, clinicopathological,
and immunohistochemical tests were performed. The tumor was resected.
Results: Two years later, metastasis were observed in the liver. The metastasis were treated with percutaneous ethanol sclerotherapy
(PET).
Conclusions: To our knowledge, this is the first case of primary renal carcinoid tumor present on the isthmus of the horseshoe kidney
and the first case of carcinoid liver metastasis to be treated with PET.
Received: 21 August 1995/Accepted: 31 August 1995 相似文献
19.
Abdominal tuberculous lymphadenopathy: MR imaging findings 总被引:7,自引:0,他引:7
Background: The purpose of this study was to evaluate the utility of magnetic resonance imaging (MRI) as a diagnostic tool in abdominal
tuberculous lymphadenopathy.
Methods: MRI studies of 11 patients with histologically proven abdominal tuberculous lymphadenopathy were reviewed with regard to
anatomic distribution, size, shape, degree, and pattern of enhancement and relation of the lesions to adjacent structures.
Results: The most common site of involvement was the periportal area (n= 6), followed by the peripancreatic (n= 5), mesenteric (n= 1), and paraaortic (n= 1) areas. Eight patients were readily diagnosed as having tuberculous lymphadenopathy on abdominal computed tomography.
Three patients had a heterogeneously enhancing masslike lesion adjacent to the pancreas and were initially diagnosed as having
cystic tumor of the pancreas. On MRI, 11 lesions showed T1 iso- or hypointensity and central T2 hyperintensity. Two lesions
showed T1 iso- or hypointensity and central T2 hypointensity. The lesions with different T2 signal intensities showed different
patterns of enhancement on contrast-enhanced dynamic studies. The relations between the enlarged lymph nodes and adjacent
bile ducts or vascular structrues were well depicted on MRI.
Conclusion: MRI was useful in differentiating enlarged lymph nodes abutting the pancreas initially diagnosed as cystic neoplasms on abdominal
computed tomography. RID=" ID=" <E5>Correspondence to:</E5> M.-J. Kim
Received: 9 May 2000/Accepted: 14 June 2000 相似文献
20.
Thoracic esophageal carcinoma: evaluation in the sagittal section with magnetic resonance imaging 总被引:2,自引:0,他引:2
A. Nakashima K. Nakashima H. Seto M. Kakishita T. Sakamoto A. Yamada M. Fujimaki 《Abdominal imaging》1997,22(1):20-23
Among 54 patients with thoracic esophageal carcinoma (53 squamous cell carcinoma, 1 adenosquamous carcinoma), the usefulness
of MR sagittal imaging for evaluating local extent (T factor) was examined by measuring the anteroposterior (AP) diameter
of the tumor. The MR examination was performed using ECG gated scans with a 3 mm slice at 1.5 Tesla. T1-weighted sagittal
images were obtained. In 10 patients the appearance of the esophagus was normal, and in 44 patients a tumor was detected in
the sagittal section. Thirty-seven lesions were histologically proved (Tis, 1; T1, 3; T2, 3; T3, 15; T4, 15). Lesions classified
as <T2 were not visible, and the appearance of the esophagus was normal. The tumors detected in sagittal section were T3 (15
tumors) or T4 (15 tumors). The mean diameter of T4 lesions (34.0 ± 7.9 mm, range 24–57 mm) was larger than that of T3 lesions
(25.0 ± 4.4 mm, range 18–33 mm) (p < 0.05). Only two masses with an AP diameter > 30 mm were resected. They were located in the lower esophagus. It is concluded
that lesions detected in MR sagittal images might be T3 or T4 tumors, and masses of >30 mm might extend to adjacent organs,
although two tumors with an AP diameter < 25 mm also invaded the trachea.
Received: 30 August 1995/Accepted: 10 October 1995 相似文献