Abstract:
:Due to the small size of the bronchial arteries, the bronchial circulation is difficult to study and remains poorly understood. We have utilized single photon emission computed tomography (SPECT) as a noninvasive means of studying the bronchial circulation. Imaging studies were performed in sheep before and after the introduction of a single pulmonary embolus. Digital bronchial arteriograms demonstrated the dilatation of the bronchial artery which is present on studies one week after embolization. SPECT bronchial perfusion scans reveal a wedge of increased activity that corresponds to a wedge of decreased activity on SPECT pulmonary perfusion images. Axial images available with SPECT provide information about regional alterations of bronchial perfusion not readily apparent on bronchial arteriograms.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Chiles C,Newman GE,Blinder RAdoi
10.1097/00004424-199001000-00014subject
Has Abstractpub_date
1990-01-01 00:00:00pages
52-7issue
1eissn
0020-9996issn
1536-0210journal_volume
25pub_type
杂志文章abstract:OBJECTIVES:The aim of this study was to conduct a radiopathologic evaluation of right-angled traction bronchiectasis to differentiate idiopathic pulmonary fibrosis (IPF) without honeycombing from idiopathic nonspecific interstitial pneumonia (NSIP). MATERIALS AND METHODS:The derivation cohort included 78 consecutive p...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000651
更新日期:2020-06-01 00:00:00
abstract::Magnetic resonance (MR) methods have been used to study the metabolic and vascular response of model tumors to tumor necrosis factor (TNF). Magnetic resonance measurements demonstrated acute reductions in tumor blood flow, measured from tumor uptake of D2O, and in tumor adenosine triphosphate (ATP), measured by 31P ma...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198912000-00022
更新日期:1989-12-01 00:00:00
abstract::The effect of contrast media (CM) dilution on contrast enhancement was studied using CM representing four structurally different molecular types at osmolalities ranging from 135 to 1340 mosm/kg. Diatrizoate (ionic monomer), iopamidol (nonionic monomer), ioxaglate (ionic dimer), and iodecol (nonionic dimer) were each g...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198809001-00014
更新日期:1988-09-01 00:00:00
abstract:OBJECTIVES:We sought to assess large bowel motility, induced by 2 prokinetic agents, senna tea and erythromycin, using functional cine magnetic resonance imaging (MRI). MATERIALS AND METHODS:Twelve volunteers underwent functional cine MRI before and after the administration of senna tea or erythromycin. The protocol c...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000183054.43131.a8
更新日期:2005-11-01 00:00:00
abstract::Recent publications of the magnetic resonance safety profile of neurostimulators, cardiac pacemakers, and other implanted devices imply that these devices are no longer a contraindication for magnetic resonance imaging. It is very promising that patients who have these implanted devices may in the future no longer be ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000185898.59140.91
更新日期:2005-12-01 00:00:00
abstract::The absorbed levels of ethanol or tetracycline, used as gallbladder sclerosing agents, were measured in the systemic blood circulation of 16 rabbits. The maximal systemic level of ethanol was 46 mg/dl and of tetracycline was 4.6 micrograms/ml after 30 minutes of gallbladder exposure. Comparable serum levels would be c...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198605000-00005
更新日期:1986-05-01 00:00:00
abstract:OBJECTIVES:Ferumoxytol, an intravenous iron supplement, can be used in off-label mode as a contrast agent in magnetic resonance imaging. The aim of this study was to assess whether ferumoxytol can be used as a marker of inflammation in animal models of acute and chronic inflammatory kidney diseases. MATERIAL AND METHO...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000209
更新日期:2016-02-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to develop and verify a method to obtain good temporal resolution T2-weighted 4-dimensional (4D-T2w) magnetic resonance imaging (MRI) by using motion information from T1-weighted 4D (4D-T1w) MRI, to support treatment planning in MR-guided radiotherapy. MATERIALS AND METHODS:Ten pat...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000381
更新日期:2017-10-01 00:00:00
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 s...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199408000-00009
更新日期:1994-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The purpose of the study was to evaluate the effect of articular fluid distention on patellar position at different degrees of knee angulation. METHODS:Patellar position in 10 cadaveric knee specimens was determined with 30, 100, and 200 mm Hg joint distention at 45, 20, and 5 degrees of knee ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199602000-00001
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to assess the impact of oral water and intravenous furosemide challenges on blood oxygenation level-dependent magnetic resonance imaging measurements in the kidney and to examine the contribution of R2 (=1/T2) to changes in R2* (=1/T2*). MATERIALS AND METHODS:This Health Insurance ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3182823591
更新日期:2013-07-01 00:00:00
abstract::The purpose of our investigation was to determine whether iopanoyl glucuronide, the major metabolite of iopanoic acid (Telepaque), undergoes hydrolysis by bacterial beta-glucuronidase in dogs. The conjugated compound was identified and quantitated by elemental analysis, fluorescent excitation analysis, thin-layer chro...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197805000-00011
更新日期:1978-05-01 00:00:00
abstract::In this article, we propose a semiautomatic method for time-continuous contour detection in all phases of the cardiac cycle in magnetic resonance sequences. The method is based on multidimensional dynamic programming. After shape parameterization, cost hypercubes are filled with image-feature derived cost function val...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000194070.88432.24
更新日期:2006-01-01 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:OBJECTIVES:In late December 2019, an outbreak of coronavirus disease (COVID-19) in Wuhan, China was caused by a novel coronavirus, newly named severe acute respiratory syndrome coronavirus 2. We aimed to quantify the severity of COVID-19 infection on high-resolution chest computed tomography (CT) and to determine its r...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000674
更新日期:2020-06-01 00:00:00
abstract::The effects of an intravenously administered nitroxyl spin label (PCA) on the magnetic resonance imaging (MRI) appearance and relaxation times of acute canine myocardial infarctions were studied. Twenty-four hours after ligation of the left anterior descending coronary artery (LAD), animals were either sacrificed imme...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:
更新日期:1985-09-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Magnetic resonance microscopy (MRM) has evolved from a technical curiosity to a tool with which researchers can study important disease models. But MRM is not simply an extension of clinical magnetic resonance imaging. In this article, the unique adaptations of MRM required in the study of caro...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199409000-00004
更新日期:1994-09-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to compare a compressed-sensing free-breathing VIBE (fbVIBE) with a conventional breath-hold VIBE (bhVIBE) for dynamic contrast-enhanced imaging of the upper abdomen. MATERIALS AND METHODS:In total, 70 datasets (bhVIBE, n = 30; fbVIBE n = 40; hard-gated [hg] reconstruction, n = 30;...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000607
更新日期:2019-11-01 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::Renal arteriography gives a reliable anatomic delineation of the renal vasculature. However, the presence of renal arterial disease does not determine the physiologic significance of the lesion. The intravenous infusion of saralasin, a specific angiotensin II antagonist, has been investigated as a method for identify...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197711000-00006
更新日期:1977-11-01 00:00:00
abstract:OBJECTIVES:Intra-arterial digital subtraction angiography (IA-DSA), an invasive procedure, is the current reference examination after percutaneous transluminal angioplasty and stenting for the detection of in-stent restenosis (ISR). In this phantom study, we evaluated flat-panel angiographic computed tomography after i...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e318276db43
更新日期:2013-02-01 00:00:00
abstract:OBJECTIVES:The purposes of this study were to evaluate the reference range of quantitative computed tomography (QCT) measures of lung attenuation and airway parameter measurements in healthy nonsmoking adults and to identify sources of variation in those measures and possible means to adjust for them. MATERIALS AND ME...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e318262292e
更新日期:2012-10-01 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::A series of 5-hydroxyacylamino-2,4,6-triiodo-N,N'-hydroxy-alkyl-isophtalamides was prepared in order to study the structural requirements for high water solubility and low toxicity. Among the amides substituted by 2-hydroxyethyl; 2,3-dihydroxypropyl; 1,3-dihydroxypropyl-; and 1,1-dihydroxy-methyl-2-oxyethyl- groups, t...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198011001-00065
更新日期:1980-11-01 00:00:00
abstract::A method of teaching radiology residents by identification of general and specific objectives to be accomplished during each time segment of the four-year training program has been developed. The objectives are incorporated into an educational contract that is signed by the resident and rotation director at the beginn...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198612000-00009
更新日期:1986-12-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:In contrast-enhanced dual-energy subtraction imaging 2 images acquired postcontrast media administration at different energies are subtracted to highlight structures hidden in the absence of contrast media. X-ray spectra of the newly developed digital full-field mammography units (GE Senographe...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.RLI.0000077124.24140.bd
更新日期:2003-09-01 00:00:00
abstract:PURPOSE:The aim of this study was to compare qualitative and quantitative image quality and geometric distortion of 4 magnetic resonance diffusion-weighted imaging (DWI) sequences of the prostate using comparable imaging parameters and similar acquisition times. METHODS AND MATERIALS:Axial T2-weighted turbo spin echo ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000429
更新日期:2018-04-01 00:00:00
abstract::Comparatively new in the roentgen evaluation of infants and children, xerography would appear to be ideal for portraying the pediatric airway. Since the radiation dose of xerography is higher than conventional radiography, its image quality is the subject of careful scrutiny in a pediatric setting here described in 23...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197807000-00002
更新日期:1978-07-01 00:00:00
abstract::Intravenous or intra-aortic injections of meglumine iothalamate in dogs indicate a slightly different tissue distribution and excretory pattern of the meglumine cation and the iothalamate anion. Differences in serum and urinary concentrations of these ions suggest some cellular penetration of the meglumine anion. In a...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197507000-00004
更新日期:1975-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Validation of new positron emission tomography (PET) tracers or magnetic (MR) imaging contrast agents is based on isolated rodent heart preparations. The use of larger animals could provide a more direct validation using the devices used for humans. METHODS:An isolated pig heart preparation ha...
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