共查询到20条相似文献,搜索用时 375 毫秒
1.
P. Reimer E. J. Rummeny M. Wissing G. M. Bongartz G. Schuierer P. E. Peters 《Abdominal imaging》1996,21(5):427-432
Background: We compared two T2-weighted turbo spin echo (TSE) sequences with a T2-weighted conventional SE (CSE) sequence to determine
whether sequences derived from rapid acquisition with relaxation enhancement such as TSE could replace CSE for the detection
and subsequent characterization of focal liver lesions.
Methods: A total of 55 consecutive patients with 107 liver lesions underwent magnetic resonance imaging examinations at 1.5 Tesla,
with a constant imaging protocol. TSE pulse sequences were acquired with eight echo trains (repetition time [TR], 4718 ms;
echo time [TE], 90 ms; acquisition time [TA], 4.03 min; and a symmetric k-space ordering scheme) and 11 echo trains (TR, 4200
ms; TE, 140 ms; TA, 4.40 min; and an asymmetric k-space ordering scheme) and compared with CSE (TR, 2300 ms; TE, 45/90 ms;
TA, 9.53 min). Images were analyzed qualitatively by scoring image quality and artifacts and counting focal liver lesions
by independent reading with consensus obtained for discrepancies. Quantitative analysis was performed by measuring signal-to-noise
(S/N), contrast-to-noise (C/N), and tumor–liver signal intensity (T/L) ratios.
Results: T2-weighted TSE sequences provided better subjective image quality and reduced artifacts as compared with the T2-weighted
CSE sequence. CSE and TSE sequences exhibited no statistically significant differences in liver S/N, lesion–liver C/N (CSE
TE, 90 ms: 18.6 ± 14.0; TSE TE, 90 ms: 16.5 ± 12.9) and the detectability of focal liver lesions. Heavily T2-weighted TSE
with a TE of 140 ms allowed correct characterization of focal liver lesions based on a T/L ratio of 3.0 in 84% of patients.
Conclusions: T2-weighted TSE sequences are as suited as CSE for the detection (TE, 90 ms), and appear to be superior for the characterization
(TE, 140 ms), of focal hepatic lesions. Whether a single sequence, such as a double-echo TSE or a single-echo TSE sequence
with a TE between 110 and 120 ms, might perform both functions as well or better than CSE is unknown. However, because of
time savings, TSE eventually may be preferred over CSE.
Received: 13 December 1994/Accepted after revision: 31 March 1995 相似文献
2.
Sclerosed hemangioma of the liver 总被引:3,自引:0,他引:3
Aibe H Hondo H Kuroiwa T Yoshimitsu K Irie H Tajima T Shinozaki K Asayama Y Taguchi K Masuda K 《Abdominal imaging》2001,26(5):496-499
We report the radiologic findings of sclerosed hemangioma (SH), a rare variant of hepatic hemangioma. Dynamic contrast-enhanced
computed tomography showed a hypodense mass in the liver with delayed enhancement. T2-weighted magnetic resonance imaging
showed the mass as hypointense in relation to cerebrospinal fluid. The final diagnosis of SH was made pathologically. Although
SH is rare, understanding its radiologic appearance is important to avoid unnecessary surgery and should be included in the
differential diagnoses of hepatic lesion with delayed enhancement.
Received: 22 May 2000/Revision accepted: 15 November 2000 相似文献
3.
Intrahepatic splenosis: imaging features 总被引:1,自引:0,他引:1
De Vuysere S Van Steenbergen W Aerts R Van Hauwaert H Van Beckevoort D Van Hoe L 《Abdominal imaging》2000,25(2):187-189
We report a patient who presented with asymptomatic focal liver lesions and in whom a diagnosis of intrahepatic splenosis
was made. This rare condition mostly occurs in patients who previously underwent splenic trauma or surgery. Magnetic resonance
imaging (MRI) characteristics suggesting this diagnosis are described. The lesions were mainly hypointense on T1- and hyperintense
on T2-weighted images. After administration of small iron oxide particles (SPIO-Endorem), the lesions remained slightly hyperintense
relative to the hypointense liver parenchyma but showed a 50% loss in signal intensity. Knowledge of these MRI characteristics
may avoid the use of surgical interventions to arrive at the correct diagnosis of these rare liver lesions.
Received: 14 June 1999/Accepted: 14 July 1999 相似文献
4.
Background: To evaluate the relationship between magnetic resonance (MR) imaging grading of iron deposition and serial serum ferritin
concentration in patients with chronic viral liver diseases.
Methods: In 80 patients with viral hepatitis and cirrhosis, MR images including T2*-weighted gradient echo images (echo time ≥ 6.5
ms) were reviewed. The grades of parenchymal iron deposition and iron-containing nodules in the liver and spleen and the liver-to-muscle
and spleen-to-muscle signal intensity ratios were compared with the most recent, the mean, the lowest, and the highest values
from all available serum ferritin levels.
Results: The serum ferritin concentration was significantly correlated with the grades of iron deposition in liver and spleen and
with the grades of iron-containing nodules seen on MR images (p < 0.05). Liver-to-muscle signal intensity ratio was weakly correlated with the ferritin concentrations. Among categories of ferritin
concentration, correlation with MR grades was highest for mean ferritin concentration (r = 0.487, p < 0.001).
Conclusion: MR imaging grades of hepatic iron and siderotic nodules correlate with serum ferritin, especially with the mean levels.
Received: 9 May 2000/Accepted: 28 June 2000 相似文献
5.
Fascioliasis: US, CT, and MRI findings with new observations 总被引:2,自引:0,他引:2
Kabaalioğlu A Cubuk M Senol U Cevikol C Karaali K Apaydin A Sindel T Lüleci E 《Abdominal imaging》2000,25(4):400-404
Background: The purpose of this study is to describe the ultrasonographic (US), computed tomographic (CT), and magnetic resonance imaging
(MRI) findings in fascioliasis and to emphasize the impact of radiology in diagnosis.
Methods: Radiologic findings in 23 consecutive patients with fascioliasis were prospectively recorded. All patients had at least one
US and CT examination, and 10 of them were studied by MRI. All diagnoses were confirmed by serologic methods. In the first
three cases, initial diagnosis was reached by microscopic demonstration of the parasites' eggs in bile obtained by US-guided
gallbladder aspiration.
Results: In the hepatic phase of fascioliasis, multiple, confluent, linear, tractlike, hypodense, nonenhancing hepatic lesions were
detected by CT. On US, the parasites could be clearly identified in the gallbladder or common bile duct as floating and nonshadowing
echogenic particles. MRI showed the lesions as hypo- or isointense on T1-weighted images and as hyperintense on T2-weighted
images.
Conclusions: CT findings in the hepatic phase and US findings in the biliary phase are characteristic of fascioliasis. Because clinical
and laboratory findings of fascioliasis may easily be confused with several diseases, radiologists should be familiar with
the specific radiologic findings of the disease to shorten the usual long-lasting diagnostic process.
Received: 15 December 1999/Accepted: 26 January 2000 相似文献
6.
Nodular regenerative hyperplasia of the liver in Budd–Chiari syndrome: CT and MR features 总被引:1,自引:0,他引:1
We report the imaging findings of spiral computed tomography (CT), magnetic resonance (MR) imaging, and MR angiography in
a patient with nodular regenerative hyperplasia of the liver associated with Budd–Chiari syndrome. Spiral CT showed multiple
enhancing nodules during the hepatic arterial and portal venous phases. MR images showed multiple hyperintense nodules on
T1-weighted images and hypointense or isointense nodules on T2-weighted images. MR angiography showed thrombotic occlusion
of three hepatic veins, suggesting Budd–Chiari syndrome.
Received: 25 June 1999/Revision accepted: 22 September 1999 相似文献
7.
Struma ovarii: appearance on MR images 总被引:2,自引:0,他引:2
I. Joja T. Asakawa A. Mitsumori T. Nakagawa Y. Hiraki T. Kudo M. Ando N. Akamatsu 《Abdominal imaging》1998,23(6):652-656
Background: The purpose of this multi-institutional study was to examine the appearance of struma ovarii on magnetic resonance (MR) images.
Methods: MR images of 12 patients with histologically proven struma ovarii were retrospectively reviewed. All patients underwent T1-weighted
and T2-weighted imaging. Contrast-enhanced T1-weighted images with Gd-DTPA were available in 10 patients. The following determinations
were made: tumor morphology, signal intensities, contrast-enhancement effects of solid components with Gd-DTPA, and comparison
of MR images with resected specimens.
Results: All 12 patients had both cystic and solid components, with a multilobulated surface and thickened septa. Signal intensities
on T1-weighted images were mainly low, partly intermediate to high, or high, and those on T2-weighted images were mainly high,
with different signal intensities. Contrast-enhancement effects were marked or moderate. The contents that showed low signal
intensities on T1-weighted images and signal voids or low signal intensities on T2-weighted images were viscid gelatinous
materials.
Conclusions: A multicystic tumor with a solid component, a multilobulated surface, and signal intensities that indicate the presence of
viscid gelatinous materials appear to be a characteristic MR finding of struma ovarii.
Received: 10 April 1997/Accepted after revision: 7 July 1997 相似文献
8.
We report the magnetic resonance findings of an unusual hemangioma in the lesser omentum. A well-circumscribed, large mass
was identified between the stomach and the left lobe of the liver, with compression of adjacent liver parenchyma. The mass
showed low signal intensity (SI) on T1-weighted images, high SI on T2-weighted images with multiple septa, and slightly decreased
SI on out-of-phase T1-weighted images. After gadolinium contrast administration, septa within the mass showed minimal enhancement
on 30-s T1-weighted images and mild enhancement on 5-min T1-weighted images. The mass was histopathologically diagnosed as
a cavernous hemangioma comprised of multiple vascular spaces, fibrotic tissue, and adipocytes.
Received: 1 December 1999/Accepted: 12 January 2000 相似文献
9.
Angiomyolipoma of the liver: significance of CT and MR dynamic study 总被引:20,自引:0,他引:20
T. Ahmadi Y. Itai M. Takahashi H. Onaya T. Kobayashi Y. O. Tanaka Y. Matsuzaki N. Tanaka Y. Okada 《Abdominal imaging》1998,23(5):520-526
Angiomyolipoma is a benign mesenchymal tumor that has been reported frequently in the kidney but rarely in the liver. In
the present study, we present four cases of hepatic angiomyolipoma with different radiologic appearances, discuss differential
diagnosis, and review previously reported cases. One of our cases was followed for 8 years. Computed tomography (plain, enhanced,
and dynamic study), magnetic resonance imaging (T1-weighted spin echo, T2-weighted spin echo, and dynamic study), ultrasonography,
and angiography were performed in all cases. Although different radiologic appearances were observed in the tumors, based
on different proportions of fat, blood vessels, and muscle, three cases were diagnosed as angiomyolipoma. In one case, it
was quite difficult to make radiologic diagnosis; hepatocellular carcinoma with fatty metamorphosis in part was most likely
suspected, but histopathological examination revealed angiomyolipoma with few fat elements. In the present study, early and
prolonged enhancement of the lesion with the special pattern of time density/intensity curve was significant for angiomyolipoma,
and we suggest that preoperative radiologic diagnosis of the lesion is possible in most of the cases. However, it can be quite
difficult to distinguish angiomyolipoma from some hepatocellular carcinomas with fatty metamorphosis.
Received: 25 April 1997/Accepted: 25 June 1997 相似文献
10.
Evaluation of Crohn disease activity with magnetic resonance imaging 总被引:11,自引:0,他引:11
Maccioni F Viscido A Broglia L Marrollo M Masciangelo R Caprilli R Rossi P 《Abdominal imaging》2000,25(3):219-228
Background: The purpose of this study was to assess the accuracy of magnetic resonance imaging (MRI) in evaluating Crohn disease (CD)
activity. The intestinal inflammatory activity is usually present in patients under pharmacologic treatment, despite their
clinical remission.
Methods: Twenty patients with CD, all under pharmacologic treatment, were prospectively studied by MRI at 1.5 T as a periodic control.
Positivity of three acute-phase reactants was considered an index of biologic activity (BA). T2-weighted, T2-weighted fat-suppressed
turbo spin-echo, and breath-hold T1-weighted turbo field-echo sequences, before and after gadolinium intravenous injection,
were obtained. A negative superparamagnetic contrast agent was orally administered. The following MRI parameters were qualitatively
evaluated by three radiologists at the level of the affected bowel and compared with clinical data: wall thickness (WT), wall
T2-weighted signal (T2W), wall contrast enhancement (WE), amount of fibrofatty proliferation (FP), and T2-weighted signal
of fibrofatty proliferation on fat-suppressed images (T2FP). The κ coefficient of agreement was calculated. The Spearman rank
correlation was used for the analysis of clinical and radiologic data.
Results: Nineteen of 20 patients were in clinical remission (Crohn Disease Activity Index < 150). On the basis of laboratory tests,
nine of 20 patients had biologically active disease. An excellent correlation was found between BA and WE, T2W, and T2FP (0.900,
0.927 and 0.961, respectively; p < 0.0001), and a lower correlation was found between BA and WT and between BA and FP (0.78 and 0.62). Excellent statistical
correlation was also found between WE and T2W and between WE and T2FP (0.876 and 0.892).
Conclusions: An excellent statistical correlation was found between biologically “active” disease and the following MRI parameters: wall
gadolinium enhancement, wall hyperintensity on T2-weighted fat-suppressed images, and hyperintensity of fibrofatty proliferation
on T2-weighted fat-suppressed images. Therefore, MRI can be valuable in assessing CD activity.
Received: 22 January 1999/Revision accepted: 3 November 1999 相似文献
11.
Background: To evaluate the diagnostic efficacy of fast T2-weighted magnetic resonance (MR) imaging sequences on image quality, hepatic
lesion detection, and lesion conspicuity.
Methods: Three breath-hold, fast T2-weighted sequences with turbo-spin-echo (TSE), half-Fourier acquisition single-shot TSE (HASTE),
and inversion recovery (IR) HASTE techniques were examined for 43 lesions in 20 consecutive patients. Evaluation was performed
qualitatively on image quality and lesion detectability and quantitatively on lesion conspicuity by using lesion/liver signal-intensity
and contrast-to-noise ratios.
Results: Artifacts were significantly less present on the HASTE sequence (p < 0.01). Both TSE and HASTE sequences detected 39 lesions (91% each); the IR HASTE sequence detected 37 (86%). IR HASTE sequence
showed a significantly higher signal-intensity ratio than did the others (p < 0.01).
Conclusions: Breath-hold TSE versus breath-hold HASTE or IR HASTE is still the most robust sequence in lesion detection, image quality,
and lesion conspicuity. However, the HASTE sequence offers good lesion detection and image quality, and the IR HASTE has a
better signal-intensity ratio.
Received: 15 January 1999/Accepted: 24 March 1999 相似文献
12.
Background: To determine the feasibility of magnetic resonance (MR) imaging in the evaluation of intestinal Behçet's disease. Methods: Eight patients diagnosed to have intestinal Behçet's disease prospectively underwent MR imaging. Five patients had previously undergone abdominal surgery for intestinal Behçet's disease 27–81 months previously. Breath-hold T2-weighted single-shot fast spin echo, T1-weighted multiplanar spoiled gradient recalled echo, and postgadolinium-enhanced fat-suppressed T1-weighted opposed-phase multiplanar spoiled gradient recalled echo images were obtained. MR findings were analyzed by three independent radiologists in terms of the presence and location of bowel wall thickening and ulcer, maximal bowel wall thickness, grade of bowel wall enhancement, and presence and nature of extraluminal manifestations. K statistics were used to evaluate interobserver variability. Results: Seven cases (88%), including the five cases with previous operations, demonstrated bowel thickening of more than 9 mm and increased enhancement. Ulcer was depicted in four cases (50%) in the terminal ileum or an anastomosis site. Three cases (38%) showed extraluminal manifestation, such as mesenteric infiltration around the involved bowel (two cases) and a sinus tract to subhepatic abscess from perforation (one case). Conclusion: Breath-hold MR imaging is useful for the evaluation of bowel wall thickening, enhancement, mesentery infiltration, and abscess formation. Characteristic ulcerative lesions may be also depicted on T1- and T2-weighted breath-hold images. MR imaging is a useful method for postoperative follow-up study for the evaluation of recurrence. 相似文献
13.
T. C. L. Soong R. C. Lee H. C. Cheng J. H. Chiang H. S. Tseng C. W. Lin M. M. H. Teng 《Abdominal imaging》1998,23(5):515-519
Background: To report the dynamic magnetic resonance (MR) imaging findings of hepatolithiasis.
Methods: Dynamic MR images (fast spoiled gradient echo sequence with intravenous injection of gadopentate dimeglumine) and computed
tomography, cholangiography, or angiography of nine patients with hepatolithiasis are analyzed.
Results: All affected hepatic segments showed atrophic changes and contained dilated intrahepatic ducts. These segments showed either
iso- or hypointensity on T1-weighted imaging and hyperintensity on T2-weighted imaging. Preferential enhancement was noted
throughout all phases of the dynamic study and persisted to delayed T1-weighted imaging in seven patients. In the last two
patients, severe atrophic changes made evaluating signal intensity differences and enhancement patterns difficult.
Conclusion: In addition to intrahepatic stones and biliary dilatation, segmental atrophy, signal intensity differences, and preferential
and persistent enhancement are important MR findings of hepatolithiasis.
Received: 18 June 1997/Accepted: 23 July 1997 相似文献
14.
Background: Double contrast magnetic resonance (MR) imaging using superparamagnetic iron oxide (SPIO) and gadolinium (Gd) is performed to detect and characterize focal liver lesions. However, this technique is a costly and lengthy process. The purpose of this study was to determine the usefulness of SPIO-enhanced MR imaging including SPIO-enhanced T1-weighted imaging in diagnosing focal liver lesions.
Methods: Eighty-four focal liver lesions were examined with a 1.5-T MR unit. Transverse precontrast T1- and T2-weighted images and SPIO (ferumoxides)-enhanced T1- and T2-weighted images were obtained, followed by Gd-enhanced T1-weighted imaging. The Gd set (i.e., precontrast T1- and T2-weighted and delayed-phase gadolinium-enhanced T1-weighted images) and ferumoxides set (i.e., precontrast T1- and ferumoxides-enhanced T1- and T2-weighted images) were reviewed by two independent readers.
Results: More lesions were detected from the ferumoxides set than from the Gd set. Ferumoxides-enhanced T1-weighted imaging showed enhancement patterns of the lesions similar to those of delayed-phase Gd-enhanced T1-weighted imaging. The diagnoses of hepatic metastasis and cyst by the ferumoxides set were similar to those by the Gd set. However, a dynamic study may be inevitable for the diagnosis of hepatocellular carcinoma and hemangioma.
Conclusion: The ferumoxides set was useful for the detection of focal hepatic lesions. Ferumoxides-enhanced T1-weighted imaging may replace delayed-phase gadolinium-enhanced T1-weighted imaging in the diagnosis of hepatic metastasis and cysts. 相似文献
15.
Dysplastic nodules of the liver: imaging findings 总被引:2,自引:0,他引:2
Background: To verify characteristic features of hepatic dysplastic nodules at different imaging modalities.
Methods: Twenty-eight patients with 37 dysplastic nodules of the liver (0.8–3.0 cm) underwent sonography (28 patients), computed tomography
(CT; 24 patients), magnetic resonance (MR; 11 patients), and angiography (12 patients). Each nodule was analyzed for echogenicity,
attenuation, signal intensity, and vascularity.
Results: Echogenicity of nodules was high in 16 (43%), homogeneous in two (6%), and low in 19 (51%) of 37 nodules. Attenuation of
nodules was high in one (7%), homogeneous in four (26%), and low in 10 (67%) of 15 nodules on the arterial-phase CT images;
homogeneous in five (33%) and low in 10 (67%) of 15 nodules on the portal-phase CT images; and high in four (17%), homogeneous
in six (26%), and low in 13 (57%) of 23 nodules on the delayed-phase CT images. Signal intensity of nodules was high in 15
(94%) and homogeneous in one (6%) of 16 nodules on T1-weighted MR images and was homogeneous in seven (44%) and low in nine
(56%) of 16 nodules on T2-weighted MR images. Vascularity of nodules was avascular in 14 (88%) and slightly vascular in two
(12%) of 16 nodules.
Conclusions: Hepatic dysplastic nodules show diverse imaging characteristics with different imaging techniques; however, common imaging
findings of hepatic dysplastic nodules are low echo, low attenuation, and high, low, or homogeneous intensity on T1- and T2-weighted
MR, and avascularity.
Received: 13 May 1998/Accepted: 1 July 1998 相似文献
16.
Fan-shaped hepatic parenchymal damage after ethanol injection therapy for hepatocellular carcinoma: MRI appearances 总被引:2,自引:0,他引:2
T. Fujita K. Honjo K. Ito T. Arita S. Koike K. Takano S. Tamura T. Matsumoto N. Matsunaga 《Abdominal imaging》1999,24(1):56-60
Background: T1- and T2-weighted magnetic resonance (MR) images frequently show fan-shaped areas of hypo- or hyperintensity in the hepatic
parenchyma adjacent to a treated hepatocellular carcinoma after percutaneous ethanol injection (PEI) therapy. These areas
correspond to abnormal contrast enhancement on serial dynamic MR images. The purpose of the present study was to describe
the location, appearance, and frequency of these abnormalities because it is important to understand these entities for the
correct assessment of therapeutic efficacy.
Methods: MR imaging including a multisection dynamic study was performed in 20 consecutive patients with hepatocellular carcinoma
treated with PEI therapy. We retrospectively evaluated the presence of fan-shaped hypointensities adjacent to treated tumors
in the liver parenchyma on T1-weighted images and hyperintensities on T2-weighted images and corresponding fan-shaped contrast
enhancement on both arterial-dominant and delayed-phase dynamic MR images. We review the location, appearance, and frequency
of these findings, and we discuss the possible causes on the basis of pathologic examinations.
Results: Seven (35%) of the 20 patients showed fan-shaped hyperintense areas adjacent to the treated tumors on T2-weighted images.
These areas showed isointensity in five patients and hypointensity in two patients on T1-weighted images. Of these seven patients,
one (14%) underwent the MR imaging within 1 month after the completion of PEI therapy, and six (86%) had it 2–9 months after
the completion of PEI therapy (mean = 6 months). In all seven patients, fan-shaped hyperperfusion abnormalities corresponding
to these areas of hyperintensity on T2-weighted images were seen on both arterial-dominant and delayed-phase dynamic MR images.
Pathologically, the coagulative necrosis of the hepatocytes with sinusoidal dilatation and the restoration by the development
of fibrous tissue were seen in these fan-shaped areas.
Conclusion: The fan-shaped areas of abnormal intensity on T1- and T2-weighted images and contrast enhancement on dynamic MR images seem
to be attributable to pathologic changes in the normal liver parenchyma induced by the toxic reaction of ethanol. Awareness
of the occurrence of such abnormalities in the peripheral liver parenchyma adjacent to the treated tumor is important for
the correct assessment of therapeutic efficacy.
RID="ID="<e5>Correspondence to:</e5> T. Fujita
Received: 24 June 1997/Accepted after revision: 22 October 1997 相似文献
17.
Background: To elucidate the imaging characteristics of well-differentiated hepatocellular carcinomas (HCCs) on ultrasonography (US),
computed tomography (CT), and magnetic resonance (MR) imaging.
Methods: Ultrasonograms, CTs, and MR images of 18 histopathologically proven well-differentiated HCCs in 15 patients were reviewed.
The findings of these images were correlated with histopathologic findings.
Results: On US, seven tumors were depicted as a hyperechoic area and eight as a hypoechoic area. Three tumors were not visualized.
On precontrast CT, four tumors were depicted as a low-density area, but 14 were not visualized. On conventional contrast-enhanced
CT, 12 tumors were depicted as a low-density area but six were not visualized. On T1-weighted MR images, 10 tumors had high
signal intensity and two had low signal intensity. Six tumors were not visualized. On T2-weighted MR images, five tumors had
high signal intensity and two had low signal intensity. Eleven tumors were not visualized. Tumors with fatty change and/or
clear cell formation were frequently hyperechoic on US and hyperintense on T1-weighted MR images.
Conclusions: Well-differentiated HCCs show different findings on US, CT, and MR imaging. Therefore, reliable diagnosis of well-differentiated
HCCs by these imaging techniques may be difficult.
Received: 29 April 1998/Revision accepted: 15 July 1998 相似文献
18.
M. Kanematsu H. Hoshi T. Yamada T. Murakami T. Kim M. Kato R. Yokoyama H. Nakamura 《Abdominal imaging》1999,24(1):47-55
Purpose: The purpose of this study was to assess the imaging findings of pathologically-proved small hepatic nodules 2 cm in size
or smaller detected with ultrasonography in cirrhotic patients with suspected hepatocellular carcinoma (HCC).
Materials and Methods: We evaluated sonographically detected 32 small hepatic nodules which were pathologically confirmed in 23 consecutive cirrhotic
patients who were suspected of having HCC. Twenty-six lesions were confirmed with ultrasonographically-guided aspiration needle-core
biopsy, and six with definitive surgery. Ultrasonographic examination records were retrospectively reviewed. CT, and MR images
obtained with various imaging techniques were retrospectively reviewed by two radiologists in a blind fashion.
Results: The 32 hepatic nodules were comprised of seven focal fatty changes, two large regenerative nodules, three low-grade dysplastic
nodules, five high-grade dysplastic nodules, and fifteen HCCs. Ultrasonography showed various echogenicity for the hepatic
nodules. The signal-intensity characteristics with T1-weighted spin-echo, in-phase gradient-recalled-echo, and dynamic MR
imagings may be useful in distinguishing HCC from nonHCC nodules.
Conclusions: Nearly half of small hepatic nodules detected with ultrasonography were nonHCC nodules. Ultrasonographic findings may not
be reliable in characterizing small hepatic nodules in cirrhosis. CT and MR imaging obtained with the various techniques are
still insensitive to these hepatic nodules.
RID="ID="<e5>Correspondence to:</e5> M. Kanematsu
Received: 25 August 1997/Revision accepted: 19 November 1997 相似文献
19.
Gabata T Matsui O Kadoya M Yoshikawa J Mitchell DG Ueda K Kawamori Y Takashima T 《Abdominal imaging》1999,24(2):153-156
Different imaging appearances of giant hyperplastic change of the caudate lobe of the liver are presented in a patient with liver cirrhosis. The mass like caudate lobe was isoechoic on ultrasound, hypodense on postcontrast computed tomography (CT), hyperintense on T1-weighted magnetic resonance, images and isointense on T2-weighted images. These imaging findings are similar to those of dysplastic nodule in cirrhotic liver. The caudate lobe received normal portal flow on CT during arterial portography, but superior mesenteric arteriography showed precocious or early division of the caudate portal branch. We suspect that caudate hyperplastic change may be correlated to anomalous caudate portal vein branch. 相似文献
20.
We describe the unusual magnetic resonance (MR) findings of a case of Wilson's disease (WD) in an asymptomatic 2-year-old
girl. Preenhanced computed tomography revealed multiple hyperdense areas in the liver. These lesions were hyperintense on
T1-weighted and hypointense on T2-weighted MR images, results that might be ascribed to the paramagnetism of copper deposited
in liver at a relatively early stage of the disease before severe liver cirrhosis had evolved.
Received: 9/10/96/Accepted: 10/16/96 相似文献