Abstract:
PURPOSE:To investigate the evolution of metabolic changes detectable with proton magnetic resonance (MR) spectroscopic imaging in acute stroke and to compare these findings with those of conventional MR imaging. MATERIALS AND METHODS:A patient with middle cerebral artery stroke underwent conventional proton-density (PD)- and T2-weighted MR imaging, MR angiography, and multisection proton two-dimensional MR spectroscopic imaging over a period of 3 hours to 5 months after symptom onset. RESULTS:On 3-hour MR images, no abnormal signal intensity change was detectable. Spectroscopic images obtained at 24 hours showed localized elevation of cerebral lactate levels. In most regions with high lactate levels, infarction subsequently occurred. In the chronic stage (5 months), the infarct was associated with reduced N-acetylaspartate levels, increased choline levels, and absence of lactate. CONCLUSION:Spectroscopic imaging enables mapping of ischemic and infarcted brain regions with greater sensitivity than does conventional MR imaging.
journal_name
Radiologyjournal_title
Radiologyauthors
Barker PB,Gillard JH,van Zijl PC,Soher BJ,Hanley DF,Agildere AM,Oppenheimer SM,Bryan RNdoi
10.1148/radiology.192.3.8058940subject
Has Abstractpub_date
1994-09-01 00:00:00pages
723-32issue
3eissn
0033-8419issn
1527-1315journal_volume
192pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::Three patients with surgically proved pancreatic carcinoma and one with chronic and acute pancreatitis were evaluated by computed tomography. Scans through the pancreatic region were initially performed with standard 10-mm collimation and then repeated using thin-section (5-mm) collimation. In all cases a pathological...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.1.7350620
更新日期:1980-01-01 00:00:00
abstract::Renal allograft accumulation of Tc-99m sulfur colloid (TSC) was studied using visual assessment of scintigraphic displays and a quantitative temporal model in 210 examinations of 56 transplant recipients. The quantitative temporal model related the immediate pool of the radioagent in the transplant to the fixed allogr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.2.6346390
更新日期:1983-08-01 00:00:00
abstract:PURPOSE:To compare two different three-dimensional (3D) gadolinium-enhanced magnetic resonance (MR) angiographic techniques. MATERIALS AND METHODS:In 26 patients suspected of having renal artery stenosis, results with fast multiphase 3D MR angiography were compared to those with standard 3D MR angiography in 37 patien...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.211.3.r99jn26667
更新日期:1999-06-01 00:00:00
abstract:PURPOSE:To determine the diagnostic accuracy of breath-hold, contrast material-enhanced, three-dimensional (3D) magnetic resonance (MR) angiography in the assessment of the aortoiliac inflow tract and renal arteries with conventional catheter angiography as the standard of reference. MATERIALS AND METHODS:In 39 patien...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.204.2.9240520
更新日期:1997-08-01 00:00:00
abstract:PURPOSE:To investigate the effects of increasing doses of angiotensin II on hepatic hemodynamics in the normal rabbit liver and in hepatic VX2 tumors by using dynamic contrast material-enhanced perfusion computed tomography (CT). MATERIALS AND METHODS:This study was approved by the institutional animal care and use co...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11101868
更新日期:2011-09-01 00:00:00
abstract:PURPOSE:To determine if T2 relaxation time measurements with magnetic resonance (MR) imaging in patients with Graves ophthalmopathy (GO) can predict response to therapy. MATERIALS AND METHODS:Studied were 84 patients with GO, 27 with Graves disease without ophthalmopathy (GD), and 12 control subjects without Graves di...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.190.3.8115640
更新日期:1994-03-01 00:00:00
abstract::Radionuclide findings in a case of cavernous sinus occlusion by an intracavernous aneurysm are described. A brain image obtained 10 minutes after injection of 99Tc pertechnetate shows diminished activity in the area of the right cavernous sinus and increased activity in the area of the right sylvian veins; these are a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/118.1.113
更新日期:1976-01-01 00:00:00
abstract::Fifty temporomandibular joints (TMJs) in 30 asymptomatic volunteers were imaged with a 1.5-T magnetic resonance (MR) imaging system to determine (a) the normal range of meniscus position, (b) the best definition of a normal TMJ and criteria to distinguish it from a TMJ with significant internal derangements, (c) the s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.177.1.2399340
更新日期:1990-10-01 00:00:00
abstract:PURPOSE:To evaluate diagnostic performance of three nonenhanced methods: variable-refocusing-flip angle (FA) fast spin-echo (SE)-based magnetic resonance (MR) angiography (variable FA MR) and constant-refocusing-FA fast SE-based MR angiography (constant-FA MR) and flow-sensitive dephasing (FSD)-prepared steady-state fr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12120859
更新日期:2013-04-01 00:00:00
abstract:PURPOSE:To assess interobserver and intraobserver reliability of three quantitative measures of coronary artery calcium burden: calcium "score," number of calcified lesions, and calcified area. MATERIALS AND METHODS:Electron beam computed tomographic (CT) scanning was used in a series of 25 patients to detect coronary...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.190.2.8284380
更新日期:1994-02-01 00:00:00
abstract::Acentric chromosome fragments produced in cells by irradiation or other agents give rise to micronuclei in daughter cells. The micronuclei can be counted readily in large numbers of cells which provides a sensitive measure of chromosome aberrations. Previous studies have shown that the presence of contrast material en...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.136.1.7384520
更新日期:1980-07-01 00:00:00
abstract::The authors sought to render projection magnetic resonance (MR) angiograms depicting a substantial length of human coronary arteries from sequential breath-hold two-dimensional MR images. Tomographic images of the right and left anterior descending coronary arteries were collected with use of a segmented gradient-reca...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.187.3.8497620
更新日期:1993-06-01 00:00:00
abstract::We describe a modification of a tracheostomy tube that allows treatment of carcinoma recurrence in the tracheal stoma using intracavitary radiation therapy. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.159.1.3952320
更新日期:1986-04-01 00:00:00
abstract:PURPOSE:To investigate the correlation between magnetic resonance (MR) imaging findings and pathologic subtype classification of hepatocellular adenoma (HCA). MATERIALS AND METHODS:This retrospective study was approved by the institutional review board, and the requirement for informed consent was waived. MR imaging s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11110023
更新日期:2011-10-01 00:00:00
abstract::Purpose To evaluate the performance of three imaging methods (radiography, dual-energy x-ray absorptiometry [DXA], and quantitative computed tomography [CT]) and that of a numerical analysis with finite element modeling (FEM) in the prediction of failure load of the proximal femur and to identify the best densitometri...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2016142796
更新日期:2016-09-01 00:00:00
abstract:PURPOSE:To develop and validate magnetic resonance (MR) imaging protocols for quantitative assessment of the structural and functional properties of the gastroesophageal junction (GEJ) and to compare MR imaging detection of reflux events against concurrent manometry as a reference method. MATERIALS AND METHODS:The loc...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10092340
更新日期:2010-10-01 00:00:00
abstract::Lung abscesses were drained by means of catheters guided by computed tomography (CT) in 19 patients who still had sepsis despite standard medical therapy; all patients had received antibiotics for at least 5 days, and 11 of the 19 patients had undergone bronchoscopy. The abscess was cured (by clinical and radiographic...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.178.2.1987590
更新日期:1991-02-01 00:00:00
abstract:PURPOSE:To evaluate the use of magnetic resonance (MR) imaging and computed tomography (CT) for predicting the histologic grade of parosteal osteosarcomas. MATERIALS AND METHODS:Sixty parosteal osteosarcomas were analyzed for tumor size and location, presence of a cleavage plane, intramedullary extension, soft-tissue ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.201.3.8939240
更新日期:1996-12-01 00:00:00
abstract:PURPOSE:To describe the imaging findings in patients with autoimmune lymphoproliferative syndrome (ALPS) and to relate the findings to the clinical and genetic features of this recently recognized syndrome. MATERIALS AND METHODS:Retrospective or prospective reviews of the computed tomographic (CT) and ultrasonographic...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.212.1.r99jl40257
更新日期:1999-07-01 00:00:00
abstract::A retrospective review was done of intracranial images obtained within the newborn period in 46 infants who had been treated with extracorporeal membrane oxygenation (ECMO). A neuroimaging score was determined on the basis of the extent and severity of findings on both ultrasound and computed tomographic scans. Presen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.165.3.3317500
更新日期:1987-12-01 00:00:00
abstract::The radiation dose and the anatomic detail of computed tomography (CT) and conventional tomography were studied in 18 patients with suspected acoustic neuroma, cholesteatoma, malignant tumor, and temporal bone fracture. It is concluded that CT is the technique of choice in patients suspected of having acoustic neuroma...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.2.7352220
更新日期:1980-02-01 00:00:00
abstract::Incarcerated obturator hernia is an uncommon entity that on occasion may produce specific radiographic findings and clinical signs (Howship-Romberg sign) that permit diagnosis prior to celiotomy. A case is reported in which the diagnosis was suggested when pain in the thigh was elicited during the course of a barium e...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.172.1.2740520
更新日期:1989-07-01 00:00:00
abstract::Noninvasive breast cancer comprises two distinct entities, lobular carcinoma in situ (LCIS) and ductal carcinoma in situ (DCIS). The increased use of screening mammography has caused more cases of noninvasive breast cancer to be discovered. However, the increased detection of LCIS and DCIS has posed problems in patien...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiology.190.3.8115600
更新日期:1994-03-01 00:00:00
abstract:PURPOSE:To determine if a correlation exists between the number of previous enhanced magnetic resonance (MR) imaging examinations and high signal intensity in the globus pallidus (GP) and dentate nucleus (DN) in patients who received gadodiamide (Omniscan), a linear nonionic gadolinium-based contrast agent, and in thos...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015150872
更新日期:2015-09-01 00:00:00
abstract::A review of 210 chest computed tomographic (CT) examinations demonstrating upper chest masses revealed 16 cases of superior vena caval obstruction (SVCO); 11 of these were clinically occult. Two of the occult cases subsequently became clinically evident. Contrast-enhanced chest CT permits the diagnosis of clinically o...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.157.2.4048460
更新日期:1985-11-01 00:00:00
abstract:PURPOSE:To determine the relationship between annual screening volume and radiologist performance in the Screening Mammography Program of British Columbia, Canada. MATERIALS AND METHODS:Standardized abnormal interpretation ratios and standardized cancer detection ratios were constructed for 35 readers with at least 3 ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.215.2.r00ma42563
更新日期:2000-05-01 00:00:00
abstract:PURPOSE:To determine the ability of ultrasonography (US)-guided spectroscopic photoacoustic (sPA) imaging to depict changes in blood oxygen saturation (SO2) in metastatic lymph nodes of a mouse model of oral cancer. MATERIALS AND METHODS:All studies were performed by following protocols approved by the institutional a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015141909
更新日期:2015-11-01 00:00:00
abstract::Two patients with cystic fibrosis and pancreatic cystosis are described who had complete replacement of the pancreas by multiple macroscopic cysts. The possible causes and clinical significance of this condition are discussed. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.158.3.3511500
更新日期:1986-03-01 00:00:00
abstract:PURPOSE:To evaluate whether exposure to strong static magnetic fields (SMFs), of up to 10 T, affects the growth and cycle distribution of and the micronucleus formation in monolayered Chinese hamster ovary CHO-K1 cells. MATERIALS AND METHODS:The authors developed a system to expose cultured cells to strong SMFs immedi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2243011300
更新日期:2002-09-01 00:00:00
abstract::Extramedullary plasmacytoma is a rare form of plasma cell dyscrasia, in which malignant plasma cell tumors arise outside the bone marrow. The tumor may arise in any part of the body but the vast majority occur in the head and neck, primarily in the nasal cavity, paranasal sinuses, or upper airway. Six patients with ex...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/128.3.625
更新日期:1978-09-01 00:00:00