Technical feasibility and performance studies of a 0.009-inch nitinol microguidewire for potential neuroendovascular applications.

abstract：RATIONALE AND OBJECTIVES:The effect of breathholding on pulmonary perfusion remains largely unknown. The aim of this study was to assess the effect of inspiratory and expiratory breathhold on pulmonary perfusion using quantitative pulmonary perfusion magnetic resonance imaging (MRI). METHODS AND RESULTS:Nine healthy v...

journal_title：Investigative radiology

authors： Fink C,Ley S,Risse F,Eichinger M,Zaporozhan J,Buhmann R,Puderbach M,Plathow C,Kauczor HU

更新日期：2005-02-01 00:00:00

abstract：OBJECTIVE:The purpose of this study was to assess the effects of gadolinium (Gd3+), provided as gadolinium chloride, on fibroblast function. MATERIALS AND METHODS:Human dermal fibroblasts in monolayer culture and intact skin in organ culture were exposed to the lanthanide metal (1-20 μM). RESULTS:Increased proliferat...

journal_title：Investigative radiology

authors： Bhagavathula N,Dame MK,DaSilva M,Jenkins W,Aslam MN,Perone P,Varani J

更新日期：2010-12-01 00:00:00

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

authors： Kim H,Yoon SH,Lee HJ,Song SG,Koh J,Jeon YK,Chae KJ,Jin GY,Jin KN,Lee KY,Goo JM

更新日期：2020-06-01 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

authors： Casali C,Obadia JF,Canet E,Bendjelid K,André-Fouët X,Revel D,Janier MF

更新日期：1997-11-01 00:00:00

abstract：:There are a number of sonographic findings seen in fibroadenoma of the breast. In a retrospective study, we examined the biopsy results of 59 masses given the sonographic diagnosis of fibroadenoma. We also reviewed the sonograms of an additional 26 biopsy-proven fibroadenomas that were not diagnosed as such with ultra...

journal_title：Investigative radiology

authors： Jackson VP,Rothschild PA,Kreipke DL,Mail JT,Holden RW

更新日期：1986-01-01 00:00:00

abstract：OBJECTIVE:Commercially available iodinated contrast media (CM) show significantly different physico-chemical properties. The relevance of the viscosity of CM may be underestimated as a contributing factor for clinically relevant renal failure as suggested by a large registry data analysis (Swedish registry study). The ...

journal_title：Investigative radiology

authors： Jost G,Pietsch H,Sommer J,Sandner P,Lengsfeld P,Seidensticker P,Lehr S,Hütter J,Sieber MA

更新日期：2009-02-01 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

authors： Albert SG,Shapiro MJ,Brown WW,Goodgold H,Zuckerman D,Durham R,Kern M,Fletcher J,Wolverson M,Plummer ES

更新日期：1994-06-01 00:00:00

abstract：OBJECTIVES:Demonstrate the usability of a new polyetheretherketone (PEEK)-based MR-compatible guidewire for renal artery catheterization, angioplasty, and stenting under MR-guidance using MR-visible markers, in vitro and in vivo. MATERIAL AND METHODS:The new 0.035'' guidewire with fiber-reinforced PEEK core, a soft ti...

journal_title：Investigative radiology

authors： Kos S,Huegli R,Hofmann E,Quick HH,Kuehl H,Aker S,Kaiser GM,Borm PJ,Jacob AL,Bilecen D

更新日期：2009-04-01 00:00:00

abstract：:The sonographic appearance of kidneys in patients presenting with acute renal failure due to hemolytic-uremic syndrome (HUS) was evaluated and compared with that in an age-matched control series. In nine patients with HUS, the renal cortex was typically hyperechogenic and the renal pyramids appeared sonolucent. The re...

journal_title：Investigative radiology

authors： Kenney PJ,Brinsko RE,Patel DV,Spitzer RE,Farrar FM

更新日期：1986-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The vasoconstriction of the renal arteries is frequently considered as a crucial factor for radiocontrast-induced nephropathy. A direct effect of iodinated radiographic contrast medium (RCM) on vascular smooth muscle is supposed to be one component of the vascular response. We studied the effec...

journal_title：Investigative radiology

authors： Uder M,Humke U,Pahl M,Jansen A,Utz J,Kramann B

更新日期：2002-08-01 00:00:00

abstract：:An ultrasound phantom was constructed simulating fetal femurs in amniotic fluid. Bones of 26, 36, 50, 58, and 70 mm, representative of gestational ages ranging from 17 to 36 weeks, were scanned with mechanical sector, phased sector, and linear array systems (ATL, Diasonics, Acuson, and GE). Measurements were made with...

journal_title：Investigative radiology

authors： Gamba JL,Bowie JD,Dodson WC,Hedlund LW

更新日期：1985-05-01 00:00:00

abstract：:A prospective, randomized study of the potential protective effects of corticosteroids administered as pretreatment against contrast material (CM) reactions is reported. Patients (n = 6,763) from multiple institutions received either a single dose of steroids (32 mg of oral methylprednisolone, approximately 2 hours be...

journal_title：Investigative radiology

authors： Lasser EC,Berry CC,Talner LB,Santini LC,Lang EK,Gerber FH,Stolberg HO

更新日期：1988-09-01 00:00:00

abstract：:A considerable amount of concern has been felt recently for the risk of carcinogenesis from x-rays to scoliosis patients. This paper re-evaluates risk in quantitative terms by using some data measured by us and other data recently published in the literature. The risks are considerably smaller than had been estimated ...

journal_title：Investigative radiology

authors： Rao PS,Gregg EC

更新日期：1984-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to determine whether cerebral fat embolism demonstrated reversible or irreversible findings in magnetic resonance (MR) imaging over time and to compare the features in MR images with histologic findings in a cat model. MATERIALS AND METHODS:MR images were obtained...

journal_title：Investigative radiology

authors： Kim HJ,Lee CH,Lee SH,Moon TY

更新日期：2003-10-01 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

authors： Gamsu G,de Geer G,Cann C,Müller N,Brito A

更新日期：1987-11-01 00:00:00

abstract：:The extent to which various concentrations of the paramagnetic metal ions [gadolinium (III), manganese (II), chromium (III), iron (III), nickel (II), copper (II), and cobalt (II)] affect proton magnetic relaxation times of distilled water, 4% human serum albumin (HSA), and dog plasma was studied in vitro. The pH of wa...

journal_title：Investigative radiology

authors： Barnhart JL,Berk RN

更新日期：1986-02-01 00:00:00

abstract：OBJECTIVES:The aim of this study was to determine if voxel-based histogram analysis of intravoxel incoherent motion imaging (IVIM) parameters can differentiate various subtypes of renal tumors, including benign and malignant lesions. SUBJECTS AND METHODS:A total of 44 patients with renal tumors who underwent surgery a...

journal_title：Investigative radiology

authors： Gaing B,Sigmund EE,Huang WC,Babb JS,Parikh NS,Stoffel D,Chandarana H

更新日期：2015-03-01 00:00:00

abstract：:At a given radiation dosage and field of view, five variables are under meaningful control for intravenous digital subtraction angiography (IV-DSA): concentration and quantity of contrast media injected, volume of injectate, rate of injection, and site of injection. Some controversy exists regarding the selection of a...

journal_title：Investigative radiology

authors： Rubin DL,Burbank FH,Bradley BR,Brody WR

更新日期：1984-01-01 00:00:00

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

authors： Kushner DC,Cleveland RH,Ehrlich MG,Zaleske DJ,DeLuca SA,Herman TE,Webster EW

更新日期：1985-12-01 00:00:00

abstract：OBJECTIVE:There is little published information regarding the efficacy of paclitaxel-coated balloon catheters except for the iopromide-containing formulation, and less is known about the kind of toxicity at overdose. The aim of our study was to assess 2 different paclitaxel matrix formulations on angioplasty balloon ca...

journal_title：Investigative radiology

authors： Kelsch B,Scheller B,Biedermann M,Clever YP,Schaffner S,Mahnkopf D,Speck U,Cremers B

更新日期：2011-04-01 00:00:00

abstract：OBJECTIVES:This clinical study investigated the pharmacokinetics and safety of gadobutrol, a magnetic resonance (MR) imaging extracellular contrast agent, in pediatric patients aged 2 to 17 years. MATERIALS AND METHODS:In this open-label, multicenter study, patients scheduled for routine contrast-enhanced MR imaging o...

journal_title：Investigative radiology

authors： Hahn G,Sorge I,Gruhn B,Glutig K,Hirsch W,Bhargava R,Furtner J,Born M,Schröder C,Ahlström H,Kaiser S,Moritz JD,Kunze CW,Shroff M,Stokland E,Trnkova ZJ,Schultze-Mosgau M,Reif S,Bacher-Stier C,Mentzel HJ

更新日期：2009-12-01 00:00:00

abstract：:A method and associated algorithm are presented which allow a simple and accurate determination to be made of the location of small symmetric areas presented in roentgenological images. The method utilizes an operator to visually spot object positions but eliminates the need for critical positoning accuracy on the ope...

journal_title：Investigative radiology

authors： Keller RA,Baily NA

更新日期：1976-03-01 00:00:00

abstract：RATIONAL AND OBJECTIVES:The purpose of this study was to evaluate the effects of variation in design parameters on the resultant radial force. We evaluated the influence of wire gauge, leg length, and number of bends on the radial force produced by z stents and compared these with radial forces produced by commercial s...

journal_title：Investigative radiology

authors： Snowhill PB,Nosher JL,Siegel RL,Silver FH

更新日期：2001-09-01 00:00:00

abstract：OBJECTIVES:The aim of this study was to compare the prognostic utility of a staging system using magnetic resonance imaging (MRI) with the seventh American Joint Committee on Cancer (AJCC) staging system in patients with hepatocellular carcinoma (HCC) who underwent hepatic resection. MATERIALS AND METHODS:A total of 1...

journal_title：Investigative radiology

authors： An C,Choi GH,Lee HS,Kim MJ

更新日期：2012-11-01 00:00:00

abstract：OBJECTIVES:The aim of this study was to evaluate the feasibility of a computed tomography (CT) protocol enabling the visualization of the prostatic artery (PA) before prostatic artery embolization (PAE) in benign prostatic hyperplasia, which provides quantitative perfusion information of the prostate gland. MATERIALS ...

journal_title：Investigative radiology

authors： Kobe A,Puippe G,Klotz E,Alkadhi H,Pfammatter T

更新日期：2019-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors report on the development and preliminary validation of a technique for measuring contrast-to-noise ratio (CNR) at all points along selected vessel segments in the original three-dimensional magnetic resonance angiography (MRA) dataset. METHODS:Contrast-to-noise ratio dependencies ...

journal_title：Investigative radiology

authors： Du Y,Parker DL,Davis WL,Blatter DD

更新日期：1993-11-01 00:00:00

abstract：:Three methods are presented which provide statistically acceptable estimates of mean transit time of opacified blood during angiography. While the methods vary in precision, the selection of the method appropriate for any particular experimental model depends on the degree of precision required to demonstrate the effe...

journal_title：Investigative radiology

authors： Silverman NR,Rosen L

更新日期：1977-07-01 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

authors： Rackow PL,Spitzer VM,Hendee WR

更新日期：1987-04-01 00:00:00

abstract：:We have examined the metabolic behavior of several triiodobenzoic acid derivatives because of the observed mutagenicity and cytotoxicity of 3-amino-5-acetamido-2,4,6-triiodobenzoate (I) and 3,5-diamino-2,4,6-triiodobenzoate (II). Measurements were facilitated using iodine-131 (131I)-labeled compounds. Drug retention i...

journal_title：Investigative radiology

authors： Weiss R,Hsu B,Wheeler L,Norman A,Riley RF

更新日期：1981-11-01 00:00:00

abstract：MATERIALS AND METHODS:Stenotic kidney (STK) and contralateral kidney magnetization transfer ratios (MTRs; Mt/M0) were measured at 3.0-T magnetic resonance imaging, at offset frequencies of 600 and 1000 Hz, before and 1 month post-PTRA in 7 RVD pigs. Stenotic kidney MTR was correlated to renal perfusion, renal blood flo...

journal_title：Investigative radiology

authors： Afarideh M,Jiang K,Ferguson CM,Woollard JR,Glockner JF,Lerman LO

更新日期：2021-02-01 00:00:00