Abstract:
RATIONALE AND OBJECTIVES:Low-field magnetic resonance imaging (MRI) evaluation of breast implants is described, with emphasis on the capabilities provided by different imaging sequences. METHODS:Open architecture MR images using a .064-T permanent magnet and three-dimensional Fourier transform and inversion recovery sequences were obtained. A breast coil was designed and built for this project. Symptomatic and asymptomatic patients with silicone, saline-silicone and saline implants, and phantoms were part of this study. Phase images were used to differentiate protons in silicone, water, and fat. RESULTS AND CONCLUSIONS:Low-field MRI permitted differentiation of silicone, water, and fat. Implant anatomy and surrounding pathology could be imaged and identified.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Frankel S,Occhipinti K,Kaufman L,Kramer D,Carlson J,Mineyev M,Friedenthal Rdoi
10.1097/00004424-199408000-00009subject
Has Abstractpub_date
1994-08-01 00:00:00pages
781-6issue
8eissn
0020-9996issn
1536-0210journal_volume
29pub_type
杂志文章abstract::Low-dose transaxial tomography is a technique that can produce cross-sectional images of the hips and femurs in children to permit calculation of the angle of femoral anteversion. Transaxial tomography was compared with computed tomography in terms of measured radiation dose and image quality. Transaxial tomography wa...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:
更新日期:1985-12-01 00:00:00
abstract::The authors compared the renal toxicity of the low osmolality radiocontrast agents, iohexol and ioxaglate, and the ionic agent, iothalamate, at equivalent iodine dose, using experimental models in vitro and in vivo. In isolated perfused rat kidneys, all agents induced comparable biphasic hemodynamic changes, associate...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199104000-00008
更新日期:1991-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To compare the visibility and localization of extratemporal cortical lesions in extratemporal epilepsy by using curved reconstruction (CR) and three-dimensional surface rendering (3D SR) of 3D-acquired MR images and to study the degree of confidence with which localizations are made, particular...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-200104000-00005
更新日期:2001-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Emulsions of perfluorocarbons (PFCs) have been tested as blood substitutes. However, evidence exists that there is long-term retention of some PFCs by the organs of the reticuloendothelial system (RES). The authors investigate organ retention of the blood substitute component, perfluorotripropy...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199208000-00012
更新日期:1992-08-01 00:00:00
abstract::A high-speed computed tomography (CT) scanner was used for measuring flow in a phantom and in the common carotid arteries of six dogs. The general ability of the scanner to assess flow using contrast media boluses was tested with the phantom. The validated simple concept was then used in the animals. The carotid blood...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198712000-00008
更新日期:1987-12-01 00:00:00
abstract::Groups of 5 fasting male and female patients aged 32-83 years were each given 3 gm of the cholecystographic contrast medium iosumetic acid in micronized form (particle size less than 20 mum); Group I with 150 ml tea (standard administration); Group II with 500 ml tea; Group III with 150 ml tea plus 10 mg metocloprami...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197607000-00009
更新日期:1976-07-01 00:00:00
abstract:PURPOSE:The aim of this study was to evaluate the diagnostic performance of virtual noncalcium (VNCa) dual-energy computed tomography (DECT) reconstructions enabling visualization of bone marrow edema for characterization of incidental thoracolumbar compression fractures in routine thoracoabdominal staging computed tom...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000458
更新日期:2018-07-01 00:00:00
abstract::The authors present a numerical deconvolution technique to compensate for image degrading effects caused by scattered photons in radiographic chest images. Fourier transform techniques are used to deconvolve a shift invariant model of the two dimensional point spread response functions of the scattered radiation. This...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198901000-00008
更新日期:1989-01-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To investigate image mottle in conventional CT images of the abdomen as a function of radiographic technique factors and patient size. METHODS:Water-filled phantoms simulating the abdomens of adult (32 cm in diameter) and pediatric (16 cm in diameter) patients were used to investigate image mo...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199904000-00005
更新日期:1999-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The efficacy of gadoteridol for contrast enhancement of central nervous system pathology was assessed in a multicenter clinical trial involving 411 patients suspected of having intracranial or spinal pathology. METHODS:Magnetic resonance imaging was performed before and after intravenous admin...
journal_title:Investigative radiology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:
更新日期:1992-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors investigate whether a modified gadolinium (Gd)-DTPA formulation can be aerosolized and used as a contrast agent for magnetic resonance (MR) ventilation imaging of the lungs. METHODS:Gadolinium-DTPA (gadopentetate dimeglumine, Schering AG, Berlin, Germany, 100 mmol Gd/L) was modifie...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199712000-00010
更新日期:1997-12-01 00:00:00
abstract::"Satisfaction of search" (SOS) refers to the effect in which a second lesion remains undetected after detection of another lesion on the same radiograph. The objective of this study was to clarify our understanding of SOS by relating it to total time of inspection and time intervals before, between, and after discover...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199107000-00003
更新日期:1991-07-01 00:00:00
abstract::The rates at which the paramagnetic compounds deoxyhemoglobin (Hb) and methemoglobin (MHb) form in vivo within an area of hemorrhage are unknown. The present experiment establishes the baseline concentrations and rates of change in paramagnetic hemoglobin concentrations, as well as the pH in normal heparinized and clo...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199003000-00006
更新日期:1990-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors assessed whether a non-sleep-deprived, second-year diagnostic radiology resident assigned to an after-hours "night stalker" emergency radiology (ER) rotation in an urban university hospital has a measurable impact on the number and clinical significance of "missed" radiologic findin...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199301000-00032
更新日期:1993-01-01 00:00:00
abstract::Trypan blue and 197HgCl2 were used as markers of the increased leakage through the blood-brain barrier which developed after selective injection of different contrast media formulations into the internal carotid arteries of rabbits. Interest was focused on a new, experimental, nonionic medium (C-29) and possible effec...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197907000-00007
更新日期:1979-07-01 00:00:00
abstract:PURPOSE:To prove the concept of peripheral continuous table movement (CTM) MR-angiography (MRA) in combination with high spatial and temporal resolution time-resolved TWIST-MRA in a single MR-examination at 3.0 T with a single dose (0.1 mmol/kg) of gadobutrol in total. MATERIALS AND METHODS:We included 22 consecutive ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3181b4c26c
更新日期:2009-09-01 00:00:00
abstract:OBJECTIVE:This study aims for targeted biopsy validation of magnetic resonance fingerprinting (MRF) and diffusion mapping for characterizing peripheral zone (PZ) prostate cancer and noncancers. MATERIALS AND METHODS:One hundred four PZ lesions in 85 patients who underwent magnetic resonance imaging were retrospectivel...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000569
更新日期:2019-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors investigated whether the ability of human malignant melanoma cells to increase in cell number or their ability to remain viable was compromised by high-field strength static magnetic fields. Normal human fibroblasts also were studied to determine if any magnetic field-related altera...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199210000-00014
更新日期:1992-10-01 00:00:00
abstract:OBJECTIVES:The aims of this study were to implement and systematically evaluate the performance of a new parameter-free segmented algorithm for analysis of diffusion imaging data using a combined intravoxel incoherent motion and diffusion kurtosis imaging (IVIM-DKI) model of spin diffusion in comparison with the simple...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000223
更新日期:2016-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To demonstrate the usefulness of a model of the parenchymous vascularization to evaluate texture analysis methods. METHODS:Slices with thickness varying from 1 to 4 mm were reformatted from a 3D vascular model corresponding to either normal tissue perfusion or local hypervascularization. Param...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199903000-00004
更新日期:1999-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To evaluate the feasibility of mechanical thrombectomy in occluded hemodialysis access shunts by using a newly developed 5F pigtail rotation catheter. METHODS:Thrombosed hemodialysis access shunts were simulated by clotted bovine blood in silicone tubing (diameter 6 mm). After retrograde and a...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199907000-00008
更新日期:1999-07-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to evaluate a high spatial resolution 3-dimensional (3D) contrast-enhanced magnetic resonance (CE-MR) venography protocol for evaluation of intracranial venous system using highly accelerated parallel imaging at 3.0 T. MATERIALS AND METHODS:Ten patients (4 male, 6 female; age,...
journal_title:Investigative radiology
pub_type: 临床试验,杂志文章
doi:10.1097/01.rli.0000236992.21065.04
更新日期:2006-10-01 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::A battery of tests for toxicity assessment of new contrast media is reviewed. Cell toxicity in a protozoan culture (Blepharisma americanum); lethal dose determination in mice; EEG Spectral analysis following cisternography in rabbits; ED50 and LD50 determination by intra- and pericerebral injection in rats; intraciste...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198011001-00053
更新日期:1980-11-01 00:00:00
abstract:PURPOSE:We sought to evaluate the potential of dynamic contrast enhancement after the intravenous administration of an iodine-based contrast medium in full-field digital mammography. MATERIAL AND METHODS:A protocol for image acquisition was established for contrast-enhanced mammography and the mammography unit (Senogr...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000167421.83203.4e
更新日期:2005-07-01 00:00:00
abstract::Radiolabeled blood cells are widely used for both clinical and research studies. In vitro and in vivo studies have shown the tagging process does not significantly affect function. The labeling techniques and clinical uses of labeled leukocytes and platelets are reviewed. ...
journal_title:Investigative radiology
pub_type: 杂志文章,评审
doi:10.1097/00004424-198603000-00001
更新日期:1986-03-01 00:00:00
abstract::Gastrografin and Amipaque with identical iodine content and flavoring were orally administered in 100 ml doses to 10 healthy volunteers in a double-blind crossover study. The nonionic Amipaque has only about one third of the osmolality of Gastrografin, and draws less fluid into the bowel lumen. Consequently there is l...
journal_title:Investigative radiology
pub_type: 临床试验,杂志文章
doi:10.1097/00004424-197811000-00008
更新日期:1978-11-01 00:00:00
abstract:PURPOSE:The aim of this study was to investigate if a quantitative evaluation of a magnetic resonance (MR) perfusion examination of the myocardium can achieve a comparable diagnostic accuracy as a semiquantitative evaluation. METHODS:A total of 31 patients with suspected coronary artery disease underwent MR imaging an...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e31824f54cb
更新日期:2012-06-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to achieve initial experience with non-contrast-enhanced (ne) magnetic resonance angiography (MRA) of the lower leg arteries in patients with peripheral arterial occlusive disease (PAOD) at 7 T. MATERIALS AND METHODS:Seven patients with PAOD were examined on a 7-T whole-body magnet...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000044
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to assess the ability of a flow-sensitive alternating inversion recovery-arterial spin labeling (FAIR-ASL) technique to track renal perfusion changes during pharmacologic and physiologic alterations in renal blood flow using microspheres as a gold standard. MATERIALS AND METHODS...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3181f5e101
更新日期:2011-02-01 00:00:00