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1.
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
2.
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
3.
A longitudinal insufficiency fracture of the tibia in association with a healed chronic osteomyelitis 总被引:3,自引:0,他引:3
Feydy A Carlier R Mutschler C Bernard L Leriverend V Vallée C 《European radiology》2000,10(12):1929-1931
Longitudinal stress fracture of the tibia often present with an atypical clinical presentation which can be mistaken for
osseous tumor or osteomyelitis. We present a case of longitudinal stress fracture of the tibia which occurred in a patient
with healed chronic osteomyelitis of the tibia. Magnetic resonance imaging failed to make the correct diagnosis. Accurate
diagnosis was only obtained by helical CT which showed the longitudinal fracture line. Magnetic resonance imaging showed only
non-specific signs of bone marrow edema, suggesting recurrence of osteomyelitis. Magnetic resonance imaging can be misleading
in the absence of direct visualization of the fracture line.
Received: 30 September 1999; Revised: 26 April 2000; Accepted: 2 May 2000 相似文献
4.
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
5.
Congenital abnormality of the aortic arch is a diagnosis made most of the time incidentally in childhood, unless dysphagia
or respiratory disorders occur before. A case of a complex aortic arch anomaly with an aneurysm of the right subclavian artery
presenting as an isolated Horner's syndrome in an adult is reported herein. Magnetic resonance imaging led to this very unusual
diagnosis.
Received: 17 March 1999; Revised: 15 July 1999; Accepted: 13 August 1999 相似文献
6.
Vázquez-Barquero A Abascal F García-Valtuille R Pinto JI Figols FJ Cerezal L 《European radiology》2000,10(10):1602-1605
An uncommon case of chronic nontraumatic spinal epidural hematoma of the lumbar spine in a 75-year-old woman is reported.
The patient presented with a 7-month history of low back pain and bilateral sciatica. Magnetic resonance imaging enabled a
correct preoperative diagnosis revealing a nodular, well-circumscribed epidural mass with peripheral enhancement and signal
intensities consistent with chronic hematoma, which extended from L2 to L3. Laminectomy of L2–L3 was performed and the hematoma
was totally resected. Histological examination of the surgical specimen demonstrated a chronic encapsulated hematoma. No evidence
of vascular malformation was found. The patient recovered fully after surgical treatment.
Received: 23 August 1999; Revised: 13 January 2000; Accepted: 4 February 2000 相似文献
7.
A 23 year old man presented with classical hypothyroidism of 9 years duration. This was associated with pituitary enlargement, documented on magnetic resonance imaging (MRI), and abnormal half-field visual evoked responses (VERs). Following the initiation of thyroxine therapy the pituitary enlargement and the VER abnormalities resolved. The final diagnosis was of primary hypothyroidism with secondary pituitary hyperplasia. 相似文献
8.
Role of radiology in the diagnosis of neurosarcoidosis 总被引:2,自引:0,他引:2
Clinical studies report a rate of 5 % and autopsy results a rate of 25 % of brain involvement in sarcoidosis. The aim of
this study was to evaluate the role of radiology in the diagnosis of patients with neurosarcoidosis. The chest radiographs
and MRI brain scans of 22 patients with sarcoidosis were retrospectively reviewed, along with the information that was provided
in the request form and clinical charts. All patients had neurological signs and symptoms; 21 patients were examined with
contrast enhancement. Facial nerve paralysis was the most common clinical manifestation identified in 10 patients. A wide
spectrum of MR findings was noted: periventricular high-signal lesions on T2-weighted images (46 %); multiple supratentorial
and infratentorial brain lesions (36 %); solitary intra-axial mass (9 %); solitary extra-axial mass (5 %); and leptomeningeal
enhancement (36 %). Neurological signs and symptoms can be significant manifestations of sarcoidosis. Magnetic resonance imaging
shows a wide spectrum of brain abnormalities associated with neurosarcoidosis. The patient's history and chest X-ray are helpful
in arriving at the correct diagnosis, but in selected cases with isolated brain involvement biopsy may still be required.
Received: 21 June 1999; Revised: 27 August 1999; Accepted: 15 October 1999 相似文献
9.
Compressive vertebral haemangiomas (VHs) are rare. Correct preoperative diagnosis is useful both for operative planning (since
compressive VHs are extremely vascular lesions) and to allow preoperative embolisation. Numerous radiological signs for VHs
have been described, but compressive VHs frequently have atypical features. In particular, magnetic resonance features are
not well established. We present imaging features in three cases of compressive VH and review the imaging findings in an additional
106 previously published cases. Findings were typical in 52 of 80 plain film (65 %), 33 of 41 computed tomography (80 %) and
13 of 25 magnetic resonance examinations (52 %). The prevalence of previously described imaging features is reported. Awareness
of the range of magnetic resonance features is important since this is frequently the initial investigation in patients presenting
with symptoms of neural compression. Since computed tomography is typical in 80 % of cases, this is a useful confirmatory
test if magnetic resonance features are suspicious but not diagnostic of compressive VH.
Received: 6 August 1999; Revised: 4 November 1999; Accepted: 4 November 1999 相似文献
10.
The purpose of this study was to determine the value of MR imaging for the demonstration of masses in the tongue and floor
of the mouth. Nine patients were prospectively examined with MR imaging after physical examination. Imaging protocol included
T2 and contrast-enhanced and non-contrast-enhanced T1-weighted turbo spin-echo sequences, and the findings were compared with
surgical and histopathological results. Histopathological examination revealed four squamous cell carcinomas, one adenoid
cystic carcinoma, two tongue abscesses, and one chronic inflammatory change. The other case was diagnosed as hemangioma depending
on clinical and imaging findings alone. In cases with squamous cell carcinoma, staging was done on the basis of MR imaging
findings, and was found to be T4 in two cases, T3 in one case, and T2 in another. The primary role of MR imaging of the tongue
and oropharynx is not to make a tissue diagnosis. Multiple deep biopsies are mandatory for the differentiation of other inflammatory
and neoplastic lesions. Magnetic resonance imaging produces coronal and sagittal image planes to assess the volume and spread
of the lesion and helps the surgeon determine the direction in which the biopsy should be performed.
Received: 4 October 1999; Revised: 31 January 2000; Accepted: 6 April 2000 相似文献
11.
Multifocal nodular fatty infiltration of the liver mimicking metastatic disease on CT: imaging findings and diagnosis using MR imaging 总被引:1,自引:0,他引:1
Kröncke TJ Taupitz M Kivelitz D Scheer I Daberkow U Rudolph B Hamm B 《European radiology》2000,10(7):1095-1100
The aim of this study was to describe the MR appearance of multifocal nodular fatty infiltration of the liver (MNFIL) using
T1-weighted in-phase (IP) and opposed-phase (OP) gradient-echo as well as T2-weighted turbo-spin-echo sequences with fat suppression
(FSTSE) and without (HASTE). Magnetic resonance imaging examinations at 1.5 T using T1-weighted IP and OP-GRE with fast low
angle shot (FLASH) technique, and T2-weighted FSTSE, T2-weighted HASTE of 137 patients undergoing evaluation for focal liver
lesions were reviewed. Five patients were identified in whom CT indicated metastatic disease; however, no liver malignancy
was finally proven. Diagnosis was confirmed by biopsy (n = 3), additional wedge resection (n = 1) or follow-up MRI 6–12 months later (n = 5). Regarding the identified five patients, the number of focal liver lesions was 2 (n = 2) and more than 20 (n = 3). The MR imaging characteristics were as follows: OP-image: markedly hypointense (n = 5); IP image: isointense (n = 2) or slightly hyperintense (n = 3); T2-weighted FSTSE-image: isointense (n = 5); T2-weighted HASTE image isointense (n = 1); slightly hyperintense (n = 4). On OP images all lesions were sharply demarcated and of almost spherical configuration (n = 5). Further evaluation by histology or follow-up MR imaging did not give evidence of malignancy in any case. Histology
revealed fatty infiltration of the liver parenchyma in three patients. Magnetic resonance follow-up showed complete resolution
in two patients and no change in three patients. Multifocal nodular fatty infiltration can simulate metastatic disease on
both CT and MR imaging. The combination of in-phase (IP) and opposed-phase (OP) gradient-echo imaging can reliably differentiate
MNFIL from metastatic disease.
Received: 15 September 1999 Revised: 3 February 2000; Accepted: 7 February 2000 相似文献
12.
The aim of this study was to determine the accuracy in quantifying right and left ventricular volumes using a 1.0-T system
and commercially available, standard equipment. For exact comparison of MRI measurements and real volumes we used an animal
heart model ex vivo. Eight pig hearts were explanted and prepared by removal of the atria. Aorta and pulmonary truncus were
cannulated. Definable volumes were injected into the ventricles. Magnetic resonance imaging was performed at 1.0 T (Gyroscan
T10 NT, Philips, Eindhoven, The Netherlands); sequence: fast field echo–echo planar (multishot EPI); body coil; MR software:
Cardiac Application Package (Philips). Statistical analysis correlated the real volumes and MR measurements separately for
both ventricles and two investigators (SAS, ANOVA). For both ventricles and both investigators the correlation between real
volumes and MR measurements was greater than 0.99. There was no significant systematic false estimation for both ventricles.
Magnetic resonance imaging at 1.0 T using standard hardware and software equipment enables the quantification of right and
left ventricular volumes with high approximation to the real volumes in vitro. There is a clear restriction in translating
these data into a clinical application because under experimental conditions no motion-induced artifacts existed.
Received: 22 July 1999; Accepted: 27 August 1999 相似文献
13.
Savnik A Amris K Røgind H Prip K Danneskiold-Samsøe B Bojsen-Møller F Bartels EM Bliddal H Boesen J Egund N 《European radiology》2000,10(10):1655-1659
Falanga is an ancient form of punishment or torture but is still commonly reported by our refugees. The late result of caning
the heel and ball of the foot is a chronic painful condition with few clinical signs. The aim of the present study was to
assess, by MRI, possible morphologic characteristics of the heel and ball of the foot, related to falanga and pain in correlation
to clinical findings. Magnetic resonance imaging of the foot was obtained in 12 victims exposed to falanga torture and 9 healthy
volunteers. Sagittal T1-weighted spin-echo images (TR 616–840 ms, TE 20 ms), T2-weighted spin-echo images (TR 1900 ms, TE
90 ms), and short tau inversion recovery (STIR) images (TR 1200 ms, TE 15 ms, TI 100 ms) were performed. The central portion
of the plantar aponeurosis was generally significantly thicker in victims exposed to falanga torture as compared with that
of controls (P < 0.05). In all except one of the victims, MRI demonstrated two layers of the thickened plantar aponeurosis: a deeper portion
with normal homogeneous low signal intensity (SI) appearance, and a superficial layer with characteristic areas of mixed SI
on both T1- and T2-weighted images. There were no signs of chronic muscular compartment syndromes, and the thickness of the
plantar pad did not differ between the two groups. Magnetic resonance imaging may demonstrate morphologic characteristics
of the plantar aponeurosis which may confirm falanga torture. Further imaging with more specific sequences is warranted to
demonstrate the supposed injuries in the compartmental fat tissue chambers and the vascularity of the ball pad of the foot.
Received: 25 November 1999; Revised: 8 February 2000; Accepted: 6 April 2000 相似文献
14.
Mediastinal myelolipoma: CT and MRI appearances 总被引:1,自引:0,他引:1
Kawanami S Watanabe H Aoki T Nakata H Hayashi T Kido M Tsukada J Eto S 《European radiology》2000,10(4):691-693
A 72-year-old man presented with a mediastinal mass on chest radiograph. Computed tomography and MR imaging showed that the
mass consisted of both fatty and small nodular soft tissue components, highly suggestive of an extramedullary hematopoiesis
or a myelolipoma. A CT-guided needle biopsy was next performed and confirmed the diagnosis. We discuss the CT and MR imaging
appearances of this tumor and usefulness of a CT-guided needle biopsy to avoid surgery in asymptomatic patients.
Received: 8 March 1999; Revised: 23 June 1999; Accepted: 25 June 1999 相似文献
15.
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
16.
Koumanidou C Theofanopoulou M Nikas J Vakaki M Pitsoulakis G Kakavakis K 《European radiology》2000,10(10):1653-1654
Cystic dysplasia of the testis is a rare, benign cause of painless hemiscrotal enlargement in children. We present two cases
of cystic dysplasia of the testis presenting with scrotal enlargement. The diagnosis was based on its specific sonographic
findings and on the coexistence of a multicystic dysplastic kidney in one case.
Received: 2 December 1999; Revised: 23 March 2000; Accepted: 27 March 2000 相似文献
17.
MRI in the diagnosis of small bowel disease: use of positive and negative oral contrast media in combination with enteroclysis 总被引:12,自引:0,他引:12
Rieber A Aschoff A Nüssle K Wruk D Tomczak R Reinshagen M Adler G Brambs HJ 《European radiology》2000,10(9):1377-1382
The aim of the study was to evaluate the additional findings of MRI following small bowel enteroclysis and to compare the
efficacy of negative and positive intraluminal contrast agents. Fifty patients with inflammatory or tumorous small bowel disease
were investigated by small bowel enteroclysis and consecutive MRI using breathhold protocol (T1-weighted fast low-angle shot,
T2-weighted turbo spin echo). Patients were randomly assigned to either receiving a positive oral (Magnevist, Schering, Berlin,
Germany) or a negative oral MR contrast media (Abdoscan, Nycomed, Oslo, Norway). The pattern of contrast distribution, the
contrast effect, presence of artifacts, as well as bowel wall and extraluminal changes, were determined and compared between
the contrast type using Fischer's exact test. Sensitivity, specificity, and diagnostic accuracy for MRI and enteroclysis were
calculated. Twenty-seven patients had clinically proven Crohn's disease and two patients surgically proven small bowel tumours.
Magnetic resonance imaging had important additional findings as abscesses and fistulae in 20 patients. Surgically compared
sensitivities were 100 and 0 % for MRI and enteroclysis, for the detection of abscesses, and 83.3 and 17 % for the diagnosis
of fistulae, respectively. Bowel wall thickening was more reliably detected with use of positive oral contrast media without
intravenous enhancement (p < 0.001), whereas postcontrast negative oral contrast media allow for a superior detection (p < 0.001). T2-weighted sequences were necessary with use of negative oral contrast media, because loop abscesses may be masked.
Magnetic resonance imaging should be performed in all patients with suspicion of extraintestinal complications, because the
complications are more reliably detected by MRI. Negative oral contrast media show advantages with the use of intravenous
contrast but can mask loop abscesses using only T1-weighted imaging.
Received: 5 March 1999; Revised: 21 September 1999; Accepted: 3 February 2000 相似文献
18.
Hottya GA Péterfy CG Uffmann M Häckl FO LeHir P Rédei J Gindele AU Dion E Genant HK 《European radiology》2000,10(3):467-475
The purpose of this review is to provide illustrative examples of diseases of the foot and ankle when imaged with a low-field
MR imaging system. A retrospective review of 268 foot and ankle examinations, performed in our institution within the past
3 years with a 0.2-T (Artoscan Esaote, Genoa, Italy) dedicated extremity MR system was done. Additionally, illustrative comparison
with conventional radiography and high-field MR imaging is presented in patients in whom these examinations were also performed.
Although motion artifact limited the value of a few studies, in the majority of examinations low-field MR imaging provided
diagnostic image quality for the full spectrum of disorders affecting the foot and ankle and seemed to be a feasible alternative
to high-field MR imaging in establishing an accurate diagnosis.
Received: 23 November 1998; Revision received: 8 February 1999; Accepted: 4 June 1999 相似文献
19.
Discriminatory power of MRI for differentiation of adrenal non-adenomas vs adenomas evaluated by means of ROC analysis: Can biopsy be obviated? 总被引:2,自引:0,他引:2
Slapa RZ Jakubowski W Januszewicz A Kasperlik-Zaluska AA Dabrowska E Fijuth J Feltynowski T Tarnawski R Królicki L 《European radiology》2000,10(1):95-104
The purpose of our study was to evaluate the discriminatory power of MRI in high-field magnet (1.5 T) for differentiation
of adrenal non-adenomas vs adenomas assessing the following parameters separately and in combination: mean diameter of adrenal
mass; previously described and new ratios as well as index calculated from signal intensity (SI) on SE T2-weighted images,
chemical shift imaging (CSI), and Gd-DTPA-enhanced dynamic studies. One hundred eight adrenal masses (36 non-hyperfunctioning
adenomas, 27 pheochromocytomas, 23 aldosterone-secreting adenomas, 20 malignant masses and 2 cortisol-secreting adenomas)
in 95 patients were evaluated with SE sequences, CSI and Gd-DTPA dynamic studies. Indices and ratios of SI for all examined
MRI methods were calculated and examined retrospectively for significance of differences between the groups with calculation
of sensitivity and specificity. Receiver operating characteristics (ROC) analysis of calculated parameters in combination
was performed. The multifactorial analysis of all four parameters, including size of the tumor, T2liver index, CSI ratio reflecting lipid content in the tumor and Womax/last ratio reflecting maximal washout of contrast agent from the tumor had 100 % sensitivity and 100 % specificity in characterization
of adrenal non-adenoma. The best performance of combination of mean tumor diameter with single MRI SI parameter was achieved
in combination with T2liver index for all adrenal masses (area under ROC 0.987) and CSI ratio for non-hyperfunctioning adrenal masses (area under ROC
0.991). Magnetic resonance imaging enables sensitive and specific diagnosis of adrenal non-adenoma.
Received: 18 June 1998; Revised: 11 January 1999; Accepted: 5 May 1999 相似文献
20.
We report a 48-year-old woman with a left posterior temporal extra-axial mass that had the imaging characteristics of a meningioma
on preoperative CT, MRI and angiography. However, a biopsy diagnosis of sarcoidosis was made. This case illustrates that dural-based
sarcoid masses can be very vascular and radiographically indistinguishable from meningiomas. Characteristic imaging features
of extra- and intra-axial sarcoid lesions are discussed.
Received: 4 March 1999/Accepted: 11 June 1999 相似文献