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1.
A case of isolated bilateral xanthogranulomatous perinephritis, which presented as a symmetrical irregular perirenal rim
of soft tissue, is reported. Differential diagnosis and image features on ultrasound, computed tomography, and magnetic resonance
are discussed.
Received: 20 May 1999; Revised: 20 July 1999; Accepted: 22 July 1999 相似文献
2.
R. Klemola A. Karttunen M. Laine A. Liisanantti J. Halonen E. Ilkko 《Emergency radiology》2001,8(2):119-122
Lymphangiomatosis is a rare condition characterized by benign angiomatous growth of lymphatic tissue. Bone infiltration may
result in lytic lesions surrounded by sclerotic margins of varying thickness. We report a nontraumatic fracture of the dens
in a female patient. Conventional radiographs and computed tomographic and magnetic resonance images are shown. The use of
computed tomography and magnetic resonance imaging is highly recommended for investigating bone lesions of lymphangiomatosis,
since, as occurred with our patient, conventional radiographs may not reveal all bone lesions in this disorder. 相似文献
3.
Elastofibroma of the neck 总被引:1,自引:0,他引:1
Elastofibromas are benign lesions of the chest wall. We describe the first reported case of elastofibroma in the neck. Imaging
features as well as location of the lesion were atypical. On computed tomography and magnetic resonance imaging the lesion
contained a marked preponderance of fat, because the lesion arose within fat.
Received: 12 November 1998 Revision requested: 18 November 1998 Revision received: 16 August 1999 Accepted: 24 August 1999 相似文献
4.
Petit P Vivarrat-Perrin L Champsaur P Juhan V Chagnaud C Vidal V Gaubert JY Bartoli JM Dessi P Zanaret M Moulin G 《European radiology》2000,10(7):1184-1189
The aim of this study was to describe cross-sectional imaging features of recurrent papilloma of the nasal fossa and paranasal
sinuses and to evaluate the role of MR and CT in the postoperative follow-up of this lesion. Magnetic resonance imaging and
CT of ten patients who presented recurrence of inverted papilloma were reviewed and correlated to initial imaging, endoscopy,
and surgical reports. Imaging patterns of recurrent inverted papilloma are identical to those of initial tumors and recurrence
location is closely related to the site of the former lesion. Magnetic resonance is more efficient than CT for the diagnosis
and evaluation of extensions. Magnetic resonance supplies the deficiencies of endoscopy in case of extensions to the frontal
sinus or the lateral recess of the antrum, especially if mucosal hyperplasia or sinusitis is associated. Magnetic resonance
imaging is the first imaging modality to perform in the follow-up after removal of inverted papilloma.
Received: 28 April 1999; Revised: 18 November 1999; Accepted: 19 November 1999 相似文献
5.
Laissy JP Menegazzo D Debray MP Toublanc M Ravery V Dumont E Schouman-Claeys E 《European radiology》2000,10(7):1138-1143
The aim of this study was to evaluate the usefulness of gadolinium-enhanced time-of-flight magnetic resonance venography
(MRV) in the diagnosis of bland thrombosis/tumoral invasion in the preoperative assessment of renal cell carcinoma. Preoperative
precontrast and enhanced GRE fast low-angle shot (FLASH) images of 36 patients with renal adenocarcinoma were reviewed and
compared with pre- and post-contrast T1-weighted images. All patients underwent surgery, and MR findings were blindly and
prospectively compared with surgical and pathologic data, considered the standard. Renal vein and vena cava were involved
in 17 and 9 patients, respectively; right atrial extension was present in one patient. Precontrast spin-echo (SE) and FLASH
images were 88 % sensitive and 100 % specific in the detection of venous involvement, respectively, and enhanced FLASH images
100 % sensitive and 96 % specific. The nature of thrombus (neoplastic or bland) was more accurately assessed (McNemar's, p < 0.05) with FLASH-enhanced MR images (sensitivity 89 %; specificity 96 %) than with SE and precontrast FLASH images (sensitivity
79 %; specificity 94 %). Our data suggest that use of Gd-enhanced MRV might improve preoperative assessment of vascular involvement
in renal carcinoma.
Received: 7 September 1999; Revised: 26 November 1999; Accepted: 26 November 1999 相似文献
6.
Middle cerebral artery (MCA) variations are found incidentally on cranial magnetic resonance angiography (MRA). Our goal
was to examine the incidence and types of MCA variations detected by MRA. Between April 1996 and March 1999, cranial MRA was
performed in 432 cases at our institution. Most of the patients examined had or were suspected to have cerebrovascular disease.
After excluding 7 patients with moyamoya disease, we retrospectively reviewed 425 MRA results. A 1.5-T scanner was used in
all studies, and maximum-intensity projection images obtained using the three-dimensional time-of-flight technique were displayed
stereoscopically. In the 425 patients MRA revealed 16 anomalous MCAs, including 9 duplicated MCAs, 5 accessory MCAs, and 2
fenestrated MCAs, which is a rate of 3.8 %. Thus, although the clinical significance is not great, we found a relatively high
incidence of anomalous MCAs on MRA. We stress that knowledge and recognition of these variations are useful and important
during the interpretation of cranial MRA.
Received: 3 August 1999; Revised: 22 November 1999; Accepted: 22 November 1999 相似文献
7.
Thanos L Papaioannou G Grammenou-Pomoni M Malagari K Brountzos EN Kelekis D 《European radiology》2000,10(1):105-107
A case of ruptured adrenal artery aneurysm is presented. The ultrasound, computed tomography and selective renal angiography
findings are described in detail. Aneurysms of adrenal arteries are particularly rare. Early diagnosis is important because
of their tendency towards rupture and subsequent high mortality rate.
Received: 12 November 1998; Revised: 10 March 1999; Accepted: 13 April 1999 相似文献
8.
Diagnostic imaging of aortic diseases 总被引:1,自引:0,他引:1
Summary
The aim of this overview is the comparison between noninvasive tomographic imaging modalities such as surface echocardiography,
transesophageal echocardiography, X-ray computed tomography and magnetic resonance imaging with the previous gold standard
angiography in the setting of acute and chronic aortic diseases.
Methods: The groundwork for the comparison between various noninvasive modalities is the validation of findings with angiography or
intraoperative and histopathological results.
Results and conclusions: Noninvasive modalities such as transesophageal echocardiography, X-ray computed tomography and magnetic resonance imaging
are suitable methods for reliable diagnosis or exclusion of aortic dissection both in the ascending and descending segment
of the thoracic aorta. Other more rare pathologies of the aorta such as intramural hemorrhage as a precursor of dissection,
aortic ulcers, aneurysms as well as congenital and posttraumatic lesions may also be subjected to transesophageal echocardiography
or magnetic resonance imaging with excellent sensitivity and specificity; both techniques have also proven to be safe procedures
in critically ill patients and have, in our view, replaced angiography for the diagnosis of acute aortic syndromes. Thus,
in acute aortic diseases invasive angiographic procedures should be relegated to a complementary role, while transesophageal
echocardiography, X-ray computed tomography (especially helical CT) in acute, and magnetic resonance imaging in chronic cases
represent prefered diagnostic options. In addition to primary diagnostics the noninvasive approaches using transesophageal
echocardiography and magnetic resonance imaging are superbly suitable for serial follow-up imaging in all forms of aortic
pathology.
Eingegangen am 23. Januar 1997 Angenommen am 23. Januar 1997 相似文献
9.
Tumors of the cardiac valves: imaging findings in magnetic resonance imaging, electron beam computed tomography, and echocardiography 总被引:2,自引:0,他引:2
Wintersperger BJ Becker CR Gulbins H Knez A Bruening R Heuck A Reiser MF 《European radiology》2000,10(3):443-449
We describe the findings from various cross-sectional imaging modalities in patients with cardiac valve adherent masses.
The techniques are discussed, and imaging findings are compared with the results of cardiac surgery. All three patients had
neurological symptoms and/or cardiac murmurs. Transthoracic and/or transesophageal echocardiography revealed the cardiac mass
in all three. For differentiation of thrombus and cardiac neoplasm magnetic resonance imaging (MRI) was also performed in
all three patients and electron-beam computed tomography (EBCT) in two. Fast segmented cine gradient-echo MRI techniques provided
mass depiction in all patients, while T1-weighted spin-echo imaging failed in mass detection in one patient. None of the patients
showed evidence of valve regurgitation or stenosis in flow sensitive cine MRI. EBCT excluded mass calcifications in both patients
and reliably demonstrated the valve attached lesions. Although echocardiography is the modality of choice in evaluating cardiac
masses and especially valve attached masses, MRI and EBCT provide additional information about tissue characteristics and
allows an excellent overview of the cardiac and paracardiac morphology. Fast segmented cine gradient-echo MRI is especially
able to depict even small tumors attached to rapidly moving cardiac valves, and valve competence can be easily assessed within
the same examination.
Received: 17 December 1998; Revision received: 1 June 1999; Accepted: 10 August 1999 相似文献
10.
MR imaging of lumbar facet joint synovial cysts 总被引:5,自引:0,他引:5
The increasing application of magnetic resonance (MR) imaging of the spine has raised the awareness of lumbar facet synovial
cysts (LFSC). This well recognised, yet uncommon condition, presents with low back pain and radiculopathy due to the presence
of an extradural mass. The commonest affected level is L4/5 with a mild degenerative spondylolisthesis a frequent associated
finding. MR imaging is the technique of choice to detect and diagnose a LFSC. This pictorial essay, drawing on experience
of 43 cases seen in 40 patients, illustrates the spectrum of appearances that can be encountered and suggest differing causes
for the variable signal characteristics exhibited. Computed tomography (CT) can be of value in some cases to aid interpretation
of the MR images. In addition, CT facet arthrography by injection of air or iodinated non-ionic contrast medium may be used
to confirm the diagnosis in doubtful cases as well as noting whether the patients presenting symptoms can be provoked. A comprehensive
review of the existing literature is presented.
Received: 22 September 1998; Revised: 29 June 1999; Accepted: 30 June 1999 相似文献
11.
Thomas Kälicke Alfred Schmitz Jörn H. Risse Stephan Arens Ewald Keller Martin Hansis Ottmar Schmitt Hans J. Biersack Frank Grünwald 《European journal of nuclear medicine and molecular imaging》2000,27(5):524-528
The aim of this study was to evaluate the clinical use of fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET)
in acute and chronic osteomyelitis and inflammatory spondylitis. The study population comprised 21 patients suspected of having
acute or chronic osteomyelitis or inflammatory spondylitis. Fifteen of these patients subsequently underwent surgery. FDG-PET
results were correlated with histopathological findings. The remaining six patients, who underwent conservative therapy, were
excluded from any further evaluation due to the lack of histopathological data. The histopathological findings revealed osteomyelitis
or inflammatory spondylitis in all 15 patients: seven patients had acute osteomyelitis and eight patients had chronic osteomyelitis
or inflammatory spondylitis. FDG-PET yielded 15 true-positive results. The tracer uptake correlated with the histopathological
findings in each case. Bone scintigraphy performed in 11 patients yielded ten true-positive results and one false-negative
result. Follow-up carried out on two patients revealed normal or clearly reduced tracer uptake, which correlated with a normalisation
of clinical data. In early postoperative follow-up it was impossible to differentiate between postsurgical reactive changes
and further infection using FDG-PET. It is concluded that acute and chronic osteomyelitis of the peripheral as well as the
central skeleton can be detected using FDG-PET. Osteomyelitis can be differentiated from soft tissue infection surrounding
the bone. Unlike computed tomography and magnetic resonance imaging, FDG-PET is not affected by metal implants used for fixing
fractures. FDG-PET demonstrated promising initial results with respect to treatment monitoring. Nevertheless, in the early
postoperative phase FDG-PET seems to be of limited value owing to unspecific tracer uptake.
Received 4 November 1999 and in revised form 20 January 2000 相似文献
12.
Abdominal wall hernias: imaging with spiral CT 总被引:4,自引:0,他引:4
Computed tomography is an accurate method of identifying the various types of abdominal wall hernias, especially if they
are clinically occult, and of distinguishing them from other diseases such as hematomas, abscesses and neoplasia. In this
study we examined the CT images of 94 patients affected by abdominal wall hernias observed over a period of 6 years. Computed
tomography clearly demonstrates the anatomical site of the hernial sac, the content and any occlusive bowel complications
due to incarceration or strangulation. Clinical diagnosis of external hernias is particularly difficult in obese patients
or in those with laparotic scars. In these cases abdominal imaging is essential for a correct preoperative diagnosis and to
determine the most effective treatment.
Received: 20 May 1999; Revised: 10 August 1999; Accepted: 13 August 1999 相似文献
13.
A case of the rare condition of renal and retroperitoneal actinomycosis is presented. The clinical and imaging (ultrasonography
and computed tomography) findings are described and attention is drawn to the diagnostic difficulties in this rare disease.
Received: 26 October 1998; Revised: 5 February 1999; Accepted: 7 May 1999 相似文献
14.
We present a case of sarcomatoid renal cell carcinoma with multiple sclerotic skeletal metastatic lesions. Renal cell carcinoma
is frequently metastatic at presentation, with a high incidence of skeletal involvement, classically described as osteolytic.
However, sclerotic or osteoblastic metastatic skeletal lesions from renal cell carcinoma are rare, with only two previous
reports identified in the literature, neither of which involved the sarcomatoid variant of renal cell carcinoma. In our case
the sclerotic metastases were characterized by bone scan, computed tomography (CT), magnetic resonance imaging (MRI), and
histologic analysis.
Received: 8 April 1999 Revision requested: 27 May 1999 Revision received: 24 June 1999 Accepted: 29 June 1999 相似文献
15.
We report a case of infective endocarditis (IE) that presented with acute neurological deterioration due to bleeding into
a brain abscess disseminated from mitral valve vegetation. The patient recovered following surgical evacuation of hemorrhage/abscess
and prolonged systemic administration of antibiotics. Although IE causes various neurological complications including intracranial
hemorrhage, hemorrhagic brain abscess in patients with IE is rare. Appropriate combination of diagnostic modalities including
computed tomography, magnetic resonance imaging, cardiac ultrasonography, and cerebral angiography, together with careful
evaluation of the clinical history, leads to accurate diagnosis and treatment of patients with IE presenting with neurological
complications. 相似文献
16.
MR urography in children: current status and future development 总被引:8,自引:0,他引:8
The normal anatomy and many pathologies of the pediatric genitourinary system can be assessed with different imaging modalities.
Most of them are based on the use of ionizing radiation and/or invasive techniques. The contribution of magnetic resonance
imaging in this regard has opened new ways of approaching pathological conditions in this patient group. The addition of the
newly developed rapid techniques has enhanced the superiority of MRI, and both morphological and functional evaluation of
the genitourinary system can be achieved. There are different factors on which rely the optimization and the efficiency of
magnetic resonance urography (MRU). Of importance is adequate patient immobilization and the use of optimal imaging sequences.
The rapid technical development, including the advent of the post-processing respiratory navigator, allows acquisition of
high-quality images independent of the patient's respiratory rate. In the future, it is expected that MRU, due to its non-use
of ionizing radiation, will become the most important tool in the diagnostic work-up of genitourinary pathologies in infants
and small children.
Received: 1 June 1999; Revision received: 9 August 1999; Accepted: 11 August 1999 相似文献
17.
Percutaneous nephrostomy: placement under laser guidance and real-time CT fluoroscopy 总被引:2,自引:0,他引:2
LeMaitre L Mestdagh P Marecaux-Delomez J Valtille P Dubrulle F Biserte J 《European radiology》2000,10(6):892-895
The purpose of this paper is to present our experience with real-time computed tomography (CT) fluoroscopy guided percutaneous
nephrostomy (PNT) and to describe this technique involving puncture under laser guidance. We attempted 30 placements in 25
patients: puncture was directed by laser guidance and placement of the tube was made under real time CT fluoroscopy. 25 procedures
were performed in prone position and 5 procedures in the supine position. The time necessary for the procedure ranged from
10 to 45 min (mean 25 min). The average duration of CT fluoroscopy per placement was 49 seconds (range 7–110 s). The PNT placement
was successful as a sole procedure including puncture and catheter placement in 24 of 30 cases; in the remainder of cases,
puncture was performed under CT guidance but the catheter was definitively positioned in conventional fluoroscopy. The CT
fluoroscopy technique allows routine, efficient and safe PNT placement, especially when encountering difficult access to the
pelvicaliceal system.
Received: 9 June 1999; Revised: 12 November 1999; Accepted: 12 November 1999 相似文献
18.
19.
Vanrietvelde F Lemmerling M Mespreuve M Crevits L De Reuck J Kunnen M 《European radiology》2000,10(4):576-578
The clinical, biochemical and magnetic resonance imaging findings of two patients with cerebrotendinous xanthomatosis are
reported. This is a rare hereditary disease. Early recognition of this entity is important in view of the existing treatment
possibilities. Magnetic resonance imaging findings typically include a bilateral and almost symmetrical increase of the signal
intensity on the T2-weighted images in the cerebellar and periventricular cerebral white matter, the basal ganglia, the dentate
nuclei and the brainstem as well as cerebellar and cerebral atrophy.
Received: 18 January 1999; Revised: 3 June 1999; Accepted: 7 June 1999 相似文献
20.
We describe a case of lipoma with osteochondroid metaplasia in the knee joint. Although the location of the lesion and radiographic
findings were unusual, computed tomography and magnetic resonance imaging were useful in characterizing adipose, cartilaginous
and osseous tissue components within the lesion.
Received: 12 October 2000 Revision requested: 3 November 2000 Revision received: 23 December 2000 Accepted: 28 December 2000 相似文献