Abstract:
RATIONALE AND OBJECTIVES:To compare the diagnostic efficacy of a standard dose of MRI contrast agent in the evaluation of primary brain tumors and metastases using a high-field 3 tesla MR unit versus a 1.5 tesla MR unit. METHODS:Sixteen patients with brain tumors were examined at both field strengths using identical axial T1-SE protocols pre- and postcontrast (0.1 mmol/kg gadolinium), and postcontrast coronal 3D GRE with magnetization preparation (MP-RAGE), which was adjusted separately for each field strength. Evaluation of the images was performed quantitatively and, in the case of T1-SE images, also by visual assessment. RESULTS:Tumor-to-brain-contrast after gadolinium administration using statistical evaluation of MP-RAGE scans was significantly higher at 3 tesla (97.5) than at 1.5 tesla (46.3). The same was true for T1-SE sequences (93.0 vs. 72.1). Signal enhancement of the lesions in T1-SE sequences was not significantly different between both field strengths. CONCLUSIONS:Administration of a gadolinium contrast agent produces higher contrast between tumor and normal brain at 3 tesla than at 1.5 tesla.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Nöbauer-Huhmann IM,Ba-Ssalamah A,Mlynarik V,Barth M,Schöggl A,Heimberger K,Matula C,Fog A,Kaider A,Trattnig Sdoi
10.1097/00004424-200203000-00003keywords:
subject
Has Abstractpub_date
2002-03-01 00:00:00pages
114-9issue
3eissn
0020-9996issn
1536-0210journal_volume
37pub_type
杂志文章abstract:RATIONALE AND OBJECTIVES:The authors developed a two-dimensional breathhold magnetic resonance (MR) technique for the direct imaging of pulmonary emboli. METHODS:In vitro MR imaging was performed to demonstrate the potential generation of clot-blood contrast by in vivo pulmonary embolism (PE). A two-dimensional magnet...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199708000-00001
更新日期:1997-08-01 00:00:00
abstract:OBJECTIVE:Computed tomography (CT) and magnetic resonance imaging (MRI) are introduced as an alternative to traditional autopsy. The purpose of this study was to investigate their accuracy in mass estimation of liver and spleen. METHODS:In 44 cases, the weights of spleen and liver were estimated based on MRI and CT da...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000221323.38443.8d
更新日期:2006-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Because of the complex relationships between the dynamic three-dimensional cardiac surface shape and its projected image, errors arise with the use of two-dimensional silhouettes to measure displacements of the heart. The character and frequency of such errors are examined. METHODS:A high-prec...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199403000-00004
更新日期:1994-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Ureteric jet index (UJI), a newly developed technique derived from color Doppler ultrasonography, may hold promise in evaluating renal function because of its ability to evaluate individual renal function and the use of nonionizing radiation. To assess the usefulness of UJI, the authors in this...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199908000-00001
更新日期:1999-08-01 00:00:00
abstract:PURPOSE:We aimed to determine whether diffusion-weighted magnetic resonance imaging, by means of the apparent diffusion coefficient (ADC), is able to guide magnetic resonance-guided biopsy in patients fit for active surveillance (AS) and identify patients harboring high-grade Gleason components not suitable for AS. MA...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e31827b711e
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to elucidate the mechanism of hepatic parenchyma-specific contrast of Sonazoid (microbubble contrast agent) using microscopic techniques. MATERIALS AND METHODS:Sonazoid was intravenously injected into rats to investigate the microbubble dynamics and distribution within hepatic...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e31805f2682
更新日期:2007-09-01 00:00:00
abstract::An allergic, immunologic mechanism for certain adverse reactions to radiocontrast agents has been postulated on the basis of clinical and theoretical considerations. One obstacle to the acceptance of this allergic theory has been the inability to demonstrate significant antibodies with specificity for these agents. In...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197609000-00002
更新日期:1976-09-01 00:00:00
abstract::The retropsoas recess, a previously undescribed normal anatomic variant, is reported. In most individuals, the space posterior to the belly of the psoas muscle contains fat within the posterior pararenal space. However, a retrospective review of 250 consecutive CT examinations of the abdomen revealed 11 cases (4.4%) i...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198707000-00004
更新日期:1987-07-01 00:00:00
abstract::Sixteen observers averaging 7.4 years experience in interpreting radiology images and 16 observers without radiology training were tested for their ability to detect low-contrast signals in structured noise backgrounds using a digital display system. No significant difference in true positives, false positives, time t...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198704000-00006
更新日期:1987-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the feasibility of adenosine-stress dynamic myocardial volume perfusion imaging with second generation dual source computed tomography (CT) for the qualitative and quantitative assessment of myocardial blood flow (MBF) compared with stress perfusion and viability magnetic resonance imaging (MRI). ...
journal_title:Investigative radiology
pub_type: 杂志文章
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更新日期:2010-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors evaluate the use of a new device for interventional creation of atrial septal defects (ASD) working with high-frequency alternating current in an in vitro study with porcine atria. METHODS:The device consists of a symmetrical cage of six superelastic monofile wires, including a mic...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199702000-00003
更新日期:1997-02-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000436
更新日期:2018-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Studies describing the effects of radiographic contrast media (RCM) in leukocyte chemotaxis have been contradictory. No studies have been performed after in-vivo exposure. The authors assess the effect of RCM on leukocytes following in-vivo exposure. METHODS:Seventeen patients were studied aft...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199401000-00012
更新日期:1994-01-01 00:00:00
abstract::The large intestines of eight boxer dogs with canine histiocytic ulcerative colitis (CHUC) and 10 normal dogs were studied by in vivo angiography and postmortem microangiography. The vascular abnormalities were correlated with the gross and histologic pathology found at necropsy. The angiographic abnormalities were ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197505000-00005
更新日期:1975-05-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198602000-00014
更新日期:1986-02-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000696
更新日期:2020-09-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000163743.63063.9f
更新日期:2005-06-01 00:00:00
abstract:OBJECTIVES:X-ray computed tomography (CT) using phase contrast can provide images with greatly enhanced soft-tissue contrast in comparison to conventional attenuation-based CT. We report on the first scan of a human specimen recorded with a phase-contrast CT system based on an x-ray grating interferometer and a convent...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3181e21866
更新日期:2010-07-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000431
更新日期:2018-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Optimal dose schedules and total dose of ionizing radiation for human central nervous system malignancy are not known. An animal model has been developed for the investigation of rat central nervous system response to proton irradiation using magnetic resonance imaging (MRI). A clinical MRI dev...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199504000-00003
更新日期:1995-04-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198507000-00009
更新日期:1985-07-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199505000-00001
更新日期:1995-05-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000209663.00629.8a
更新日期:2006-06-01 00:00:00
abstract::The potential of magnetic resonance imaging (MRI) quantification of calcium for the evaluation of pulmonary nodules was investigated in simulated nodules. Calcium salts do not contain mobile protons and thus have no signal on MR proton images. To determine whether the absence of signal from partially calcified nodules...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198711000-00001
更新日期:1987-11-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000218
更新日期:2016-03-01 00:00:00
abstract::A method is presented for selective catheterization and filming of the small internal spermatic and proper hepatic arteries in rabbits. The angiograms thus obtained afford clear delineation of the vessels and their branches and can enhance radiographic investigation of a variety of experimental disease models. ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197705000-00009
更新日期:1977-05-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199711000-00010
更新日期:1997-11-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e318190fbd2
更新日期:2009-02-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198702000-00013
更新日期:1987-02-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:This study was devised to develop a method of measuring the acute effects of radiocontrast media on renal function and assessing the relationship of the dose of radiocontrast media infused with the incidence of radiocontrast-induced renal failure. In addition, the drug adenosine phosphate-magne...
journal_title:Investigative radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004424-199406000-00004
更新日期:1994-06-01 00:00:00