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1.
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
2.
Comparison of MRI pulse sequences for investigation of lesions of the cervical spinal cord 总被引:3,自引:0,他引:3
Small spinal cord lesions, even if clinically significant, can be due to the low sensitivity of some pulse sequences. We
compared T2-weighted fast (FSE), and conventional (CSE) spin-echo and short-tau inversion-recovery (STIR)-FSE overlooked on
MRI sequences to evaluate their sensitivity to and specificity for lesions of different types. We compared the three sequences
in MRI of 57 patients with cervical spinal symptoms. The image sets were assessed by two of us individually for final diagnosis,
lesion detectability and image quality. Both readers arrived at the same final diagnoses with all sequences, differentiating
four groups of patients. Group 1 (30 patients, 53 %), with a final diagnosis of multiple sclerosis (MS). Demyelinating lesions
were better seen on STIR-FSE images, on which the number of lesions was significantly higher than on FSE, while the FSE and
CSE images showed approximately equal numbers of lesions; additional lesions were found in 9 patients. The contrast-to-noise
ratio (CNR) of 17 demyelinating lesions was significantly higher on STIR-FSE images than with the other sequences. Group 2,
19 patients (33 %) with cervical pain, 15 of whom had disc protrusion or herniation: herniated discs were equally well delineated
with all sequences, with better myelographic effect on FSE. In five patients with intrinsic spinal cord abnormalities, the
conspicuity and demarcation of the lesions were similar with STIR-FSE and FSE. Group 3, 4 patients (7 %) with acute myelopathy
of unknown aetiology. In two patients, STIR-FSE gave better demarcation of lesions and in one a questionable additional lesions.
Group 4, 4 patients (7 %) with miscellaneous final diagnoses. STIR-FSE had high sensitivity to demyelinating lesions, can
be considered quite specific and should be included in spinal MRI for assessment of suspected demyelinating disease.
Received: 21 September 1999/Accepted: 10 December 1999 相似文献
3.
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
4.
The aim of this study was to describe the fine-needle aspiration biopsy (FNAB) procedure in patient with a optic nerve lesion.
A case of optic nerve and brain aspergillosis, an infrequent condition that can mimic tumor or tumor-like lesions, is reported.
The patient was studied by CT and MRI and definite diagnosis was established by means of an ultrasound-guided FNAB. Specimen
preparation revealed the presence of multiple hyphae of Aspergillus fumigatus in the optic nerve lesion. The FNAB procedure is a safe and reliable diagnostic method for suspected intraorbitary tumors
and tumor-like conditions especially when other less-invasive modalities have failed to establish the diagnosis and when cytologic
confirmation is needed to implement aggressive therapy.
Received: 18 March 1999; Revised: 22 July 1999; Accepted: 28 July 1999 相似文献
5.
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
6.
Spinal neural foraminal widening is usually caused by benign lesions, most commonly neurofibromas. Rare lesions can also
cause spinal neural foraminal widening. Computed tomography and/or MRI are the modalities of choice for studying the spinal
foraminal widening. The present pictorial review describes six rare lesions, namely a lateral thoracic meningocele, a malignant
fibrous histiocytoma, a tuberculous abscess, an osteoblastoma, a chondrosarcoma and a malignant tumour of the lung which caused
spinal neural foraminal widening.
Received: 23 November 1998; Revised: 4 March 1999; Accepted: 20 April 1999 相似文献
7.
Comparison of a conventional cardiac-triggered dual spin-echo and a fast STIR sequence in detection of spinal cord lesions in multiple sclerosis 总被引:1,自引:0,他引:1
Bot JC Barkhof F Lycklama à Nijeholt GJ Bergers E Polman CH Adèr HJ Castelijns JA 《European radiology》2000,10(5):753-758
The current optimal imaging protocol in spinal cord MR imaging in patients with multiple sclerosis includes a long TR conventional
spin-echo (CSE) sequence, requiring long acquisition times. Using short tau inversion recovery fast spin-echo (fast STIR)
sequences both acquisition time can be shortened and sensitivity in the detection of multiple sclerosis (MS) abnormalities
can be increased. This study compares both sequences for the potential to detect both focal and diffuse spinal abnormalities.
Spinal cords of 5 volunteers and 20 MS patients were studied at 1.0 T. Magnetic resonance imaging included cardiac-gated sagittal
dual-echo CSE and a cardiac-gated fast STIR sequence. Images were scored regarding number, size, and location of focal lesions,
diffuse abnormalities and presence/hindrance of artifacts by two experienced radiologists. Examinations were scored as being
definitely normal, indeterminate, or definitely abnormal. Interobserver agreement regarding focal lesions was higher for CSE
(ϰ = 0.67) than for fast STIR (ϰ = 0.57) but did not differ significantly. Of all focal lesions scored in consensus, 47 %
were scored on both sequences, 31 % were only detected by fast STIR, and 22 % only by dual-echo CSE (n. s.). Interobserver
agreement for diffuse abnormalities was lower with fast STIR (ϰ = 0.48) than dual-echo CSE (ϰ = 0.65; n. s.). After consensus,
fast STIR showed in 10 patients diffuse abnormalities and dual-echo CSE in 3. After consensus, in 19 of 20 patients dual-echo
CSE scans were considered as definitely abnormal compared with 17 for fast STIR. The fast STIR sequence is a useful adjunct
to dual-echo CSE in detecting focal abnormalities and is helpful in detecting diffuse MS abnormalities in the spinal cord.
Due to the frequent occurrence of artifacts and the lower observer concordance, fast STIR cannot be used alone.
Received: 9 September 1999; Revised: 14 December 1999; Accepted: 16 December 1999 相似文献
8.
目的 :探讨创伤后脊髓囊变的MRI表现及与其临床预后的关系。材料和方法 :回顾性分析 67例脊髓囊变病例的临床和MRI表现。结果 :67例伤后髓内囊变 ,颈髓 3 9例 ,胸髓 2 8例 ,囊变的位置与脊柱骨折、脱位位置一致 ;囊变的平均长度 (T1WI矢状位上下范围 )为 14mm ;脊髓囊变的信号变化同脑脊液 ;其大小、形态、位置同临床症状无明显关系。结论 :髓内囊变是慢性期脊髓损伤常见的病理改变 ;髓内囊变是同一水平骨折、脱位椎体直接撞击脊髓引起。髓内囊变为一局限性、稳定性病变。 相似文献
9.
目的分析脊髓亚急性联合变性(SCD)的MRI诊断要点。资料与方法回顾性分析15例临床确诊SCD的病人临床及MRI资料,分析其脊髓MRI表现特点,统计分析SCD病人受累脊髓节段数与血清VB12水平、发病时间的相关性。结果 15例SCD病人均于横断面影像上显示颈胸段脊髓对称性等或长T1、长T2信号,13例病变主要位于颈胸段水平脊髓后索,2例同时累及后索、侧索及前索。但于横断面T2WI上颈段与胸段脊髓异常信号形态各具特点。颈段脊髓受累时于横断面T2WI上呈脊髓内"倒V"形或"反兔耳"形的对称性高信号。胸段脊髓受累时于横断面T2WI上呈脊髓内"哑铃"形的对称性高信号。统计学分析显示15例SCD病人脊髓受累节段数与血清VB12水平呈负相关,而与病程长短无相关性。结论脊髓MR成像对于SCD脊髓疾病的诊断有重要价值。 相似文献
10.
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
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.
Spinal cord tumors 总被引:6,自引:0,他引:6
D. L. F. Balériaux 《European radiology》1999,9(7):1252-1258
Spinal cord tumors are rare; however, every radiologist should be able to recognize and readily identify those lesions often
found in younger patients or children [1, 2, 3, 4, 5, 6, 7, 8,9]. Early diagnosis plays an important role in the management
of the lesions and interferes with the prognosis and final outcome of the patient [10]. Plain X-ray of the spine and CT are
of limited diagnostic value in cases of intramedullary pathology. Magnetic resonance imaging should be performed as soon as
possible and as the first technique whenever an intrinsic spinal cord lesion is clinically suspected. Systematic analysis
of the MR images together with a basic knowledge of the most common spinal cord tumors encountered, including astrocytomas,
ependymomas, and hemangioblastomas, should provide a correct diagnosis and lead to appropriate treatment subsequently. 相似文献
13.
The aim of this study was to assess radiomorphologic and clinical features of tracheal rupture due to blunt chest trauma.
From 1992 until 1998 the radiomorphologic and clinical key findings of all consecutive tracheal ruptures were retrospectively
analyzed. The study included ten patients (7 men and 3 women; mean age 35 years); all had pneumothoraces which were persistent
despite suction drainage. Seven patients developed a pneumomediastinum as well as a subcutaneous emphysema on conventional
chest X-rays. In five patients, one major hint leading to the diagnosis was a cervical emphysema, discovered on the lateral
cervical spine view. Contrast-media-enhanced thoracic CT was obtained in all ten cases and showed additional injuries (atelectasis
n = 5; lung contusion n = 4; lung laceration n = 2; hematothorax n = 2 and hematomediastinum n = 4). The definite diagnosis of tracheal rupture was made by bronchoscopy, which was obtained in all patients. Tracheal rupture
due to blunt chest trauma occurs rarely. Key findings were all provided by conventional chest X-ray. Tracheal rupture is suspected
in front of a pneumothorax, a pneumomediastinum, or a subcutaneous emphysema on lateral cervical spine and chest films. Routine
thoracic CT could also demonstrate these findings but could not confirm the definite diagnosis of an tracheal rupture except
in one case; in the other 9 cases this was done by bronchoscopy. Thus, bronchoscopy should be mandatory in all suspicious
cases of tracheal rupture and remains the gold standard.
Received: 22 February 1999; Revision received: 29 June 1999; Accepted: 1 July 1999 相似文献
14.
M Gr?nning J Risberg H Skeidsvoll G Moen L Aanderud K Troland E Sundal E Thorsen 《Undersea & hyperbaric medicine》2005,32(6):397-402
The purpose of this study was to evaluate the use of electroencephalography (EEG) and magnetic resonance imaging (MRI) in the clinical evaluation of acute decompression sickness (DCS) in the central nervous system (CNS). Twenty-one patients treated because of acute DCS in the CNS during 1999-2001 were included, 15 patients with clinical cerebral DCS and five with clinical spinal cord DCS. Seven patients had abnormalities in their EEG, five with cerebral DCS and two with spinal cord DCS. MRI showed high intensity lesions in the spinal cord in four patients with clinical spinal cord DCS and in one with clinical cerebral DCS. Cerebral lesions were not identified by MRI in any patient. In conclusion, EEG showed unspecific abnormalities in only one third of the cases. Conventional MRI with a 1.5 T scanner may be of help in the diagnosis of DCS in the spinal cord, but not in the brain. EEG and MRI have low sensitivity in the diagnosis of acute DCS in the CNS. Recompression treatment of DCS should still be guided by clinical neurological examination and assessment of symptoms. 相似文献
15.
目的:评价MRI对恶急性联合变性(SCD)的诊断价值。方法:搜集21例临床怀疑SCD的患者行MRI矢状面T1 WI和T2WI、横轴面T2WI,其中8例行Gd DTPA增强扫描,10例治疗后行MRI复查。结果:所有患者均显示 T2WI上颈髓、胸髓后部、侧索呈高信号,有1例前索出现类似病灶,Gd-DTPA增强扫描所有病变区均未见明显强化。10 例经维生素B12治疗6-12个月后复查,示T2WI上原高信号病灶范围明显缩小或消失,与患者临床症状和体征的缓解和改善呈正相关。结论:MRI有助于SCD的诊断并可观察临床疗效。 相似文献
16.
Dietemann JL Thibaut-Menard A Warter JM Neugroschl C Tranchant C Gillis C Eid MA Bogorin A 《Neuroradiology》2000,42(11):810-813
We compared the sensitivity of T2-weighted spin-echo (FSE) and fast short-tau inversion-recovery (fSTIR) sequences in detection
of multiple sclerosis of the spinal cord in 100 consecutive patients with clinically confirmed multiple sclerosis (MS); 86
patients underwent also brain MRI. In all, 310 focal lesions were detected on fSTIR and 212 on T2-weighted FSE, spinal cord
lesions were seen better on fSTIR images, with a higher contrast between the lesion and the normal spinal cord. In 24 patients
in whom cord plaques were shown with both sequences, the cranial study was normal or inconclusive. Assessment of spinal plaques
can be particularly important when MRI of the brain is inconclusive, and in there situations fSTIR can be helpful.
Received: 20 October 1999 Accepted: 23 February 2000 相似文献
17.
目的 探讨脊髓型临床孤立综合征(CIS)的临床及磁共振成像(MRI)特征.方法 回顾分析63例临床早期表现为脊髓型CIS的多发性硬化(MS)患者的MRI表现及扩展的功能障碍状况量表(EDSS)评分.结果 52.9%的MS患者在早期表现为脊髓型CIS,其中88.9%以急性或亚急性起病,42.9%的首发症状为孤立的感觉障碍,54.9%为颈髓受累.首次MRI阳性率达91.1%,其中35.3%存在"多灶性"损害,45.1%病变范围在2个椎体节段内,81.7%的独立病灶在矢状位的长度不超过2个椎体高度,89.0%在轴位不超过脊髓横径的1/2.基线MRI的病灶数量、面积与确诊时的EDSS评分有正相关关系;皮质类固醇激素冲击治疗前后的EDSS评分有统计学差异(P=0.003).结论 脊髓型CIS以急性、亚急性起病、颈髓受累多见,脊髓损害不完全,MRI可有"多灶"损害,早期病灶定量分析对评估预后有一定价值,皮质类固醇激素冲击治疗能有效缓解症状. 相似文献
18.
The objective of this study was to compare the image quality, sensitivity, specificity, and diagnostic accuracy of an open
low-field MR system (0.2 T) with a standard high-field MR system (1.5 T) after arthrography of the shoulder. Thirty-eight
patients either with suspected chronic instability (n = 12) or rotator cuff abnormalities (n = 26) were examined. Intra-articular injection of diluted Gd-DTPA was followed in randomized order either first by imaging
on an open 0.2-T system or on a 1.5-T system. The image material was evaluated independently by two radiologists in a blinded
fashion with respect to overall image quality and the detection of rotator cuff as well as capsular and labral abnormalities.
Surgical correlation was available in 27 (71 %) of 38 patients. For both systems, sensitivity and specificity for rotator
cuff tears were 100 % each, and for labrum pathologies, these values were 100 and 93 %, respectively. The agreement for detection
of labral pathologies between low-field and high-field examinations was good (ϰ = 0.69, ϰ = 0.61). For the detection of full-thickness tears of the rotator cuff, the agreement between the low-field and high-field
MR examinations was very good and significant (ϰ = 0.94, ϰ = 1, p < 0.001). Overall image quality was rated good in 17 (45 %) and fair in 21 (55 %) of 38 cases on the 0.2-T MR system, and
good in 32 (84 %) and fair in 6 (16 %) of 38 cases on the 1.5-T system. Motion artifacts were considered low in 24 (63 %)
and moderate in 14 (37 %) of 38 cases for the 0.2-T system and low in 34 (89 %) and moderate in 4 (11 %) for 1.5-T system.
Based on our results, low-field MR compares favorably to high-field MR in the detection of major abnormalities of the glenohumeral
joint, at least when MR arthrography is used. Disadvantages are the duration of the examination and thus the risk of reduced
image quality caused by motion artifacts.
Received: 14 July 1999; Revised: 27 December 1999; Accepted: 27 December 1999 相似文献
19.
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
20.
Bogaert J Kuzo R Dymarkowski S Janssen L Celis I Budts W Gewillig M 《European radiology》2000,10(12):1847-1854
Regular follow-up is required in patients with previous intervention for coarctation of the aorta to detect recoarctation
or aneurysm formation. In this study we describe the findings encountered on routine follow-up exams and we compare the use
of contrast-enhanced 3D MR angiography (CE MRA) with fast spin-echo MRI (FSE) to study the thoracic aorta after previous intervention.
In 51 consecutive patients previously treated for aortic coarctation, 74 MR studies of the thoracic aorta were performed during
a 2-year period using CE MRA and FSE MRI. The thoracic aorta was evaluated for abnormalities of course, caliber, shape, and
pathology of side branches. The CE MRA and FSE MRI studies were evaluated side by side by consensus of two reviewers evaluating
which MR technique depicted the abnormalities of the thoracic aorta the best. Of 74 exams, six clinically important abnormalities
were found: four aneurysms and two restenoses. Two small pseudoaneurysms were missed on the FSE studies. Contrast-enhanced
MRA was judged to visualize aortic abnormalities better than FSE (47 of 74 MR studies) especially for the transverse aortic
arch, coarctation site, left subclavian artery, and aortic arch configuration. For the ascending aorta and distal descending
aorta, CE MRA and FSE performed equally well. Aortic diameters measured at four levels in the first 18 MRI studies showed
no significant differences in diameter when measured by FSE or CE MRA (p = not significant). Clinically important abnormalities, such as aneurysm formation and restenosis, can be present years after
treatment for aortic coarctation. In the regular follow-up of these patients, CE MRA may provide additional diagnostic information
compared with FSE and should be included as part of the routine exam.
Received: 3 April 2000; Revised: 5 July 2000; Accepted: 7 July 2000 相似文献