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1.
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
2.
Ide C De Coene B Mailleux P Baudrez V Ossemann M Trigaux JP 《European radiology》2000,10(12):1865-1870
We present the characteristic imaging findings of hypoplasia of the internal carotid artery (ICA) in two cases, one accompanied
by an intracranial aneurysm. Finding of a diffuse luminal narrowing of the ICA on MR angiography or digital subtraction angiography
(DSA) could wrongly evoke severe acquired diseases such as dissection or atherosclerosis. Absence of associated wall thickening
and flow disturbances on color Doppler sonography (CDS) should suggest carotid hypoplasia. Confirmation of the diagnosis is
obtained by CT of the skull showing a small carotid canal. Non-invasive procedures are sufficient to differentiate this rare
congenital anomaly from acquired string signs.
Received: 25 October 1999; Revised: 27 January 2000; Accepted: 30 March 2000 相似文献
3.
Krainik A Sarrazin JL Camparo P Vincendeau S Houlgatte A Cordoliani YS 《European radiology》2000,10(10):1636-1638
We report the case of a 25-year-old man who presented a fibrous pseudotumor of the epididymis, a rare focal location of nodular
and diffuse fibrous proliferation. We provide the ultrasonographic and MRI findings with pathologic correlation.
Received: 8 October 1999; Revised: 25 January 2000; Accepted: 1 February 2000 相似文献
4.
Magnetic resonance imaging in the assessment of urologic disease: an all-in-one approach 总被引:9,自引:0,他引:9
Verswijvel GA Oyen RH Van Poppel HP Goethuys H Maes B Vaninbrouckx J Bosmans H Marchal G 《European radiology》2000,10(10):1614-1619
The aim of this study was to evaluate an “all-in-one” MR procedure to examine the kidneys, the renal vascular supply and
renal perfusion, and the urinary tract. In 64 patients (58 with urologic disease and 6 healthy volunteers), MR was performed
including: (a) T1- and T2-weighted imaging; (b) 3D contrast-enhanced MR angiography (MRA), including the renal arteries, renal
veins, as well as renal perfusion; and (c) 3D contrast-enhanced MR urography (MRU) in the coronal and sagittal plane. For
the latter, low- and high-resolution images were compared. Prior to gadolinium injection, 0.1 mg/kg body weight of furosemide
was administered intravenously. The results were compared with correlative imaging modalities (ultrasonography, intravenous
urography, CT), ureterorenoscopy and/or surgical–pathologic findings. Visualization of the renal parenchyma, the vascular
supply, and the collecting system was adequate in all cases, both in nondilated and in dilated systems and irrespective of
the renal function. One infiltrating urothelial cancer was missed; there was one false-positive urothelial malignancy. Different
MR techniques can be combined to establish an all-in-one imaging modality in the assessment of diseases which affect the kidneys
and urinary tracts. Continuous refinement of the applied MR techniques and further improvements in spatial resolution is needed
to expand the actual imaging possibilities and to create new tracts and challenges in the MR evaluation of urologic disease.
Received: 27 September 1999; Revised: 20 January 2000; Accepted: 22 May 2000 相似文献
5.
Hydatid disease (HD) may develop in almost any part of the body. The liver is the most frequently involved organ (75 %),
followed by the lung (15 %) and the remainder of the body (10 %). Hydatid cysts with unusual localizations may cause serious
problems in the differential diagnosis. In this article the various imaging findings of hydatid cysts with unusual localizations
are reviewed, based on our experience. Findings in brain, heart, pericard, kidney, intraperitoneum, retroperitoneum, bone,
soft tissue, and breast are discussed. Hydatid disease should be considered in the differential diagnosis of all cystic masses
in all anatomic locations, especially when they occur in areas where the disease is endemic. The combination of clinical history,
imaging findings, and serologic test results usually help the diagnosis.
Received: 22 June 1999, Revised: 25 January 2000, Accepted: 29 March 2000 相似文献
6.
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
7.
Spontaneous rupture of primary angiosarcoma of the spleen is an uncommon cause of acute abdominal pain and hemoperitoneum.
Clinical findings and presentation are nonspecific and variable. CT is frequently used as a first-line imaging modality in
the evaluation of acute abdominal pain; however, findings are not specific for angiosarcoma. We report a case of primary splenic
angiosarcoma with spontaneous rupture, hemoperitoneum, and hepatic metastases in a patient presenting to the emergency department
with acute left upper quadrant pain and fever. 相似文献
8.
Mazonakis M Damilakis J Maris T Prassopoulos P Gourtsoyiannis N 《European radiology》2000,10(12):1899-1903
The aim of this study was to apply a random marking volumetric technique in MR images for estimation of spleen volume. The
MR imaging was performed in phantoms and 16 patients with indications unrelated to splenic disease. Images were transferred
to a workstation to perform volumetric measurements using the random marking technique and the conventional technique of manual
planimetry. Two observers independently measured splenic volume in order to evaluate reproducibility of both volumetric techniques.
Phantom experiments revealed that the accuracy of the random marking technique and manual planimetry was approximately the
same. In vivo splenic volume measurements derived from both volumetric techniques were highly correlated (r = 0.99, p < 0.0001). For both observers intraobserver variation was found to be lower with the random marking technique than with manual
planimetry. Interobserver coefficient of variation using the manual planimetry was 4.6 % and was reduced to 2.9 % by adopting
the random marking technique. The random marking technique was almost two times faster than the manual planimetry. The combination
of the random marking technique with MR imaging might provide accurate, reproducible, quick splenic volume estimations.
Received: 3 March 2000, Revised: 29 May 2000, Accepted: 30 May 2000 相似文献
9.
Gleno-humeral instabilities 总被引:4,自引:1,他引:3
The purpose of this review is to highlight the most efficient imaging exploratory techniques depicting shoulder instability,
to describe its various forms and to point out the findings which can simulate instability. In anterior recurrent dislocation,
surgery is indicated and the procedure essentially depends on the importance of glenoid rim lesions. In this case, a standard
X-ray evaluation is usually sufficient. The CT arthrography or MRI techniques give more specific details as to the severity
of the lesions, particularly soft tissues alterations; however, these data do not alter standard therapeutic protocol. In
fixed posterior dislocations, CT scan represents the most pertinent technique to evaluate the size of the humeral head defect
and to determine the therapeutic follow-up. In subtle forms of instability, diagnosis or instability direction are not clearly
assessed clinically and standard X-ray evaluation is usually unremarkable. In this case, further exploration, such as CT arthrography,
MR imaging or MR arthrography, are recommended to confirm the diagnosis of instability and to evaluate its direction. The
technique of choice is undoubtedly MR arthrography. Atraumatic voluntary painless subluxations associated with hyperlaxity
of the shoulder do not require any specific exploratory method because the findings are generally limited to a capacious axillary
pouch.
Received: 28 September 1998; Revised: 21 January 1999; Accepted: 22 March 1999 相似文献
10.
García Figueiras R Sousa Escandón A García Figueiras A González Rodríguez AA Pazos González G Armesto Fernández M Lapeña Villarroya JA Pérez Valcárcel J Rey Sanjurjo JL 《European radiology》2000,10(10):1639-1643
Retrovesical masses in men not related to prostatic carcinoma or hyperplasia is an uncommon pathology. Rare masses or unusual
manifestations of those common diseases are a diagnostic dilemma. We review our experience in three unusual retrovesical masses
in men: carcinosarcoma filling a giant bladder diverticulum; cystic prostatic carcinoma; and acquired cystic dilatation of
the seminal vesicle associated with a prostatic carcinoma that obstructed and invaded the vesicle. We report the imaging findings
and review the literature. In our experience, the imaging findings are usually not specific for doing a precise diagnosis
and biopsy procedures are necessary.
Received: 18 October 1999; Revised: 13 March 2000; Accepted: 16 March 2000 相似文献
11.
A 5-year-old boy with macrocephaly and mental retardation was referred for radiologic evaluation. After cranial CT and MR
imaging, the diagnosis of mural type vein of Galen aneurysmal malformation was established by angiography. Two weeks later,
preembolization angiography revealed complete thrombosis of the malformation. Although it is a very rare event, vein of Galen
aneurysmal malformation may spontaneously thrombose following diagnostic angiography. Possible effects of contrast media on
thrombosis were discussed.
Received: 27 April 1999; Revised: 29 September 1999; Accepted: 28 January 2000 相似文献
12.
Acute spontaneous spinal epidural haematoma in a child 总被引:3,自引:0,他引:3
Spontaneous spinal epidural haematomas rarely occur. Patients tend to be in their sixties or seventies. Acute spontaneous
spinal epidural haematomas in children without a predisposition for bleeding disorders, trauma, vascular malformations or
anticoagulant therapy have seldom been described. We present a case of a 4-year-old girl with a spontaneous cervical epidural
haematoma diagnosed with MR.
Received: 20 January 2000; Revised: 18 April 2000; Accepted: 19 April 2000 相似文献
13.
Value of fluid-attenuated inversion recovery sequences in early MRI of the brain in neonates with a perinatal hypoxic-ischemic encephalopathy 总被引:3,自引:0,他引:3
The aim of our study was to assess the usefulness of fluid-attenuated inversion recovery (FLAIR) sequences in comparison
with conventional spin-echo and inversion MR imaging in neonates for evaluation of myelination and for detection of hypoxic-ischemic
brain injury. We reviewed early MR scans of 18 neonates with suspected hypoxic-ischemic brain damage. Myelination could be
evaluated with confidence using conventional MR imaging in all but 2 infants; however, the presence of myelin was very difficult
to assess on FLAIR images. Overall, 53 lesions or groups of lesions were identified. The FLAIR technique was more sensitive
in 11 of the lesions; especially (pre)cystic lesions could be identified much better and more cysts were found. Conventional
MR imaging failed to identify 2 of the lesions and was more sensitive in 14 of the lesions; especially punctate hemorrhages
and lesions in basal ganglia or thalami could be better determined. The FLAIR technique missed 3 of these lesions. In the
remaining 28 lesions conventional MR and FLAIR images were equally diagnostic. The FLAIR technique and conventional MR imaging
are complementary in detecting early sequelae of hypoxic-ischemic brain injury in neonates. The FLAIR technique is not suitable
for assessing myelination of the neonatal brain; therefore, FLAIR cannot replace conventional MR imaging.
Received: 11 January 2000; Revised: 10 April 2000; Accepted: 10 April 2000 相似文献
14.
We report on a 46-year-old patient in whom an intracranial dural arteriovenous (AV) fistula, supplied by a branch of the
ascending pharyngeal artery, drained into spinal veins and produced rapidly progressive symptoms of myelopathy and brainstem
dysfunction including respiratory insufficiency. Magnetic resonance imaging studies demonstrated brainstem oedema and dilated
veins of the brainstem and spinal cord. Endovascular embolization of the fistula led to good neurological recovery, although
the patient had been paraplegic for 24 h prior to embolization. This case demonstrates the MRI characteristics of an intracranial
dural AV fistula with spinal drainage and illustrates the importance of early diagnosis and treatment. Even paraplegia may
be reversible, if angiography is performed and the fistula treated before ischaemic and gliotic changes become irreversible.
Received: 25 May 1999; Revised: 25 January 2000; Accepted: 15 February 2000 相似文献
15.
Sarcoidosis is a multisystemic disease of unknown aetiology characterised by noncaseating granulomatous inflammation with
varying presentation and prognosis. Osseous disease reported in 1–13 % of cases commonly involves hands and feet; however,
vertebral sarcoidosis is rare. This report describes the radiologic, CT, MRI and radionuclide imaging findings of vertebral
involvement of a case with sarcoidosis.
Received: 28 January 1999; Revised: 14 April 1999; Accepted: 25 April 1999 相似文献
16.
MR Imaging features of pelvic mucinous carcinomas 总被引:2,自引:0,他引:2
Mucinous carcinomas in the pelvis differ from non-mucinous tumors because of the differences in clinical outcome and imaging
appearance. Mucinous rectal carcinomas, for example, are known to be higher in stage at the time of the diagnosis because
they are more likely to be infiltrative and show a greater tendency for recurrence. These factors may lead to a poorer prognosis
in patients with the mucinous as compared with non-mucinous carcinomas. Mucinous carcinomas of all types typically show high
signal intensity on T2-weighted MR images, and therefore mimic other conditions such as necrotic tumors, fluid collections,
cysts, or liver hemangiomas. To familiarize readers with the MRI appearance, and to avoid pitfalls, this paper illustrates
the MRI features of the mucinous adenocarcinomas in various pelvic organs.
Received: 8 February 1999; Revised: 7 October 1999; Accepted: 10 January 2000 相似文献
17.
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
18.
Purpose: Today patients with suspected diverticulitis are commonly imaged with a CT scan utilizing a variety of methods of contrast
medium administration. Although CT with rectally administered colon contrast has demonstrated a high diagnostic accuracy,
concerns have been raised over its safety in patients with diverticulitis. The following retrospective investigation was undertaken
to answer this concern. Materials and methods: Between January, 1997, and July, 1999, 308 patients with suspected diverticulitis were examined in the Emergency Radiology
Division of the Massachusetts General Hospital by means of a helical CT scan performed with rectally administered colon contrast
material. The patients' CT findings were correlated with their clinical courses and/or surgical findings. Results: Of the 308 CT scans, 115 (37.3 %) were positive for diverticulitis. Of 193 patients without diverticulitis, 91 (47.1 % of
patients without diverticulitis) had alternative diagnoses made by CT, such as small bowel obstruction, epiploic appendagitis,
and urinary tract calculi. No complications due to colon contrast material were noted. Even in cases where there was free
extraluminal air, no extravasated contrast material was seen. Rectally administered colon contrast was well tolerated by patients
and provided excellent large bowel opacification. This method saved imaging time in an emergency setting, as there was no
need to wait for oral contrast to reach the colon. Conclusion: Out of 308 CT scans, there were no complications from the use of rectally administered colon contrast material. No case of
traumatic bowel perforation secondary to colon contrast material was observed. Rectally administered colon contrast material
is safe in the CT examination of patients with suspected diverticulitis. 相似文献
19.
Computed tomographic high-attenuation mediastinal lymph nodes after aluminum exposition 总被引:1,自引:0,他引:1
A case with increased computed tomographic densities of mediastinal lymph nodes with histologically proven aluminum storage
is presented. We suggest consideration of aluminosis as differential diagnosis in patients with increased native CT densities
beyond 50 HU.
Received: 20 January 2000; Revised: 18 May 2000; Accepted: 22 May 2000 相似文献
20.
Weishaupt D Hetzer FH Ruehm SG Patak MA Schmidt M Debatin JF 《European radiology》2000,10(12):1958-1964
The aim of this study was to compare the performance of 3D MRI in conjunction with an intravascular contrast agent to spiral
contrast-enhanced CT, regarding the detection of abdominal parenchymal injuries as well as peritoneal hemorrhage in an animal
model. Liver and kidney injuries were created surgically in six female pigs under general anesthesia. All pigs underwent contrast-enhanced
spiral CT and 3D MR imaging following administration of an intravascular contrast agent (NC100150 Injection). Two readers
rated their confidence independently on MR and CT data sets using a five-point scale for the presence of organ injury and
hemoperitoneum. Autopsy findings served as standard of reference. Sensitivity and specificity for MR in detecting hepatic
and renal injuries as well as hemoperitoneum was 100 %. Computed tomography was less accurate with sensitivity and specificity
values of 90 and 94 %, respectively. Receiver operating characteristics (ROC) analysis revealed a higher confidence when interpretation
was based on MR images. In an animal model 3D MR imaging in conjunction with an intravascular contrast agent proved highly
accurate in detecting and localizing parenchymal injuries to the upper abdomen as well as in detecting intraperitoneal blood
collections.
Received: 4 November 1999, Revised: 5 May 2000, Accepted: 9 May 2000 相似文献