The blood-brain barrier: effects of nonionic contrast media with and without addition of Ca2+ and Mg2+.

abstract：OBJECTIVE:: This feasibility study was performed to assess whether dynamic contrast-enhanced ultrasound (CEUS) and transient arterial occlusion are able to detect alterations in the microvascular perfusion and arterial perfusion reserve in patients suffering from peripheral arterial disease (PAD) in comparison with hea...

journal_title：Investigative radiology

authors： Amarteifio E,Weber MA,Wormsbecher S,Demirel S,Krakowski-Roosen H,Jöres A,Braun S,Delorme S,Böckler D,Kauczor HU,Krix M

更新日期：2011-08-01 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

authors： Zach JA,Newell JD Jr,Schroeder J,Murphy JR,Curran-Everett D,Hoffman EA,Westgate PM,Han MK,Silverman EK,Crapo JD,Lynch DA,COPDGene Investigators.

更新日期：2012-10-01 00:00:00

abstract：:In vivo and in vitro studies have shown that areas of myocardial infarctions can be delineated on CT scans after intravenous administration of iodinated contrast material to dogs with experimental myocardial infarctions. Within the first minute after intravenous administration of contrast material (initial myocardial ...

journal_title：Investigative radiology

authors： Higgins CB,Siemers PT,Newell JD,Schmidt W

更新日期：1980-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To compare electron beam tomography (EBT) with MR imaging (MRI) for detection of restenosis after coronary angioplasty (PTCA). METHODS:One hundred eighteen patients after PTCA were investigated. By EBT, 50 axial images were acquired (3-mm slice thickness, 120-160 mL radiographic contrast agent...

journal_title：Investigative radiology

authors： Ropers D,Regenfus M,Stilianakis N,Birke S,Kessler W,Moshage W,Laub G,Daniel WG,Achenbach S

更新日期：2002-07-01 00:00:00

abstract：:The effect of intravenous urography (IVU) on the excretion rate and precipitation of Tamm-Horsfall glycoprotein (THG) has been evaluated in 19 patients. Urine samples were collected immediately before the administration of contrast medium (U1) and then during the period of the excretion urogram (U2). The urinary THG: ...

journal_title：Investigative radiology

authors： Dawnay AB,Thornley C,Nockler I,Webb JA,Cattell WR

更新日期：1985-01-01 00:00:00

abstract：:A new technique for the noninvasive measurement of an index of renal blood flow is described. The method utilizes ultrasound determined renal volume and radionuclide assessment of the mean transit time of a pertechnetate bolus through the kidneys. From this information a value for flow is calculated according to compa...

journal_title：Investigative radiology

authors： Powers TA,Rees RS,Bowen RD

更新日期：1983-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To present the results of two studies conducted to evaluate the pharmacokinetics and safety of iomeprol in healthy volunteers and in patients with various degrees of renal impairment. METHODS:In these two open-label, single-dose, phase I studies, a 50-mL dose of iomeprol 400 was administered i...

journal_title：Investigative radiology

authors： Lorusso V,Taroni P,Alvino S,Spinazzi A

更新日期：2001-06-01 00:00:00

abstract：:Prior studies of the opacification-phase effects of left ventricular (LV) injection of angiographic contrast medium (CM) on LV size and function have yielded discrepant results. A sensitive ultrasonic technique was used to measure LV dimension (Di) in 10 open-chest dogs with physiologic heart rates, and injection of s...

journal_title：Investigative radiology

authors： LeWinter MM,Pavelec RS

更新日期：1982-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The author analyzes findings of consistency of rotator-cuff calcifications found at ultrasound (US)-guided needle treatment compared with findings of plain radiography, US, and computed tomography (CT). METHODS:Twenty patients had rotator-cuff calcifications (mean diameter, 1.5 cm; range, 1.1-...

journal_title：Investigative radiology

authors： Farin PU

更新日期：1996-05-01 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

authors： Johansen JG

更新日期：1978-11-01 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

authors： Watanabe R,Matsumura M,Munemasa T,Fujimaki M,Suematsu M

更新日期：2007-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Interstitial laser photocoagulation (ILP) causes localized tissue necrosis. This study was performed to determine 1) whether the changes seen on computed tomography (CT) correspond to the necrosis pathologically, and 2) which CT technique best shows the necrosis. METHODS:Eighteen Wistar rats h...

journal_title：Investigative radiology

authors： Amin Z,Thurrell W,Spencer GM,Harries SA,Grant WE,Bown SG,Lees WR

更新日期：1993-12-01 00:00:00

abstract：OBJECTIVES:We compared the image quality and diagnostic performance of 2 fat-suppression methods for black-blood T2-weighted fast spin-echo (FSE), which are as follows: (a) short T1 inversion recovery (STIR; FSE-STIR) and (b) spectral adiabatic inversion recovery (SPAIR; FSE-SPAIR), for detection of acute myocardial in...

journal_title：Investigative radiology

authors： Srichai MB,Lim RP,Lath N,Babb J,Axel L,Kim D

更新日期：2013-01-01 00:00:00

abstract：:Magnetic resonance spectroscopy (MRS) has been most extensively applied to the study of animal models and not humans. The major reason for this extensive animal research is due to the nature of the early magnetic resonance high-field magnets, which only permitted the study of isolated cells, tissues, or small animals....

journal_title：Investigative radiology

authors： Balaban RS

更新日期：1989-12-01 00:00:00

abstract：OBJECTIVES:The objective of this study was to prospectively compare diagnostic performance and time efficiency of a double-reading paradigm in which a first-reader computer-aided detection (CAD) is followed by a fast 2-dimensional review (DR FR-CAD) with those of a double reading with second-reader CAD (SR CAD). MATER...

journal_title：Investigative radiology

authors： Iussich G,Correale L,Senore C,Hassan C,Segnan N,Campanella D,Bert A,Galatola G,Laudi C,Regge D

更新日期：2014-03-01 00:00:00

abstract：:The authors conducted an observer performance study to compare breast lesion detection of conventional mammography (CM) with teleradiology (TE) transmitted mammograms. One hundred four abnormal, single-projection mammographic images were transmitted by teleradiology. Abnormalities included 11 cases with skin thickenin...

journal_title：Investigative radiology

authors： Fajardo LL,Yoshino MT,Seeley GW,Hunt R,Hunter TB,Friedman R,Cardenas D,Boyle R

更新日期：1990-10-01 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

authors： Diekmann F,Diekmann S,Jeunehomme F,Muller S,Hamm B,Bick U

更新日期：2005-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The objective is to assess the diagnostic accuracy and interobserver variability of multiphase 3D gadolinium-enhanced magnetic resonance angiography (3D-Gd-MRA) for assessment of abdominal and pelvic vascular disease. METHODS:In 41 patients from two different institutions multiphase 3D-Gd-MRA ...

journal_title：Investigative radiology

authors： Schoenberg SO,Essig M,Hallscheidt P,Sharafuddin MJ,Stolpen AH,Knopp MV,Yuh WT

更新日期：2002-01-01 00:00:00

abstract：:We have examined the effect of dose on contrast medium-induced reductions in glomerular filtration in anesthetized rabbits. The fraction of renal plasma flow that is filtered, the filtration fraction, was directly measured by the renal arteriovenous difference method using technetium-99m (99mTc) (Sn) DTPA as the trace...

journal_title：Investigative radiology

authors： Harvey LA,Caldicott WJ

更新日期：1983-09-01 00:00:00

abstract：OBJECTIVES:The goal of this study was to demonstrate feasibility of measuring extracellular pH in cartilage and meniscus using acidoCEST technique with a 3-dimensional ultrashort echo time readout (acidoCEST-UTE) magnetic resonance imaging (MRI). MATERIALS AND METHODS:Magnetization transfer ratio asymmetry, radiofrequ...

journal_title：Investigative radiology

authors： Ma YJ,High RA,Tang Q,Wan L,Jerban S,Du J,Chang EY

更新日期：2019-09-01 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

authors： Chiu NT,Wu CC,Yao WJ,Tu DG,Lee BF,Tong YC,Pan CC

更新日期：1999-08-01 00:00:00

abstract：:Simultaneous inflation of two balloons may be necessary for balloon dilation valvuloplasty in patients with a large annulus. We examined the cardiovascular effects of dilating the pulmonary annulus with two balloons in 18 normal dogs using pulsed Doppler ultrasound and gross and microscopic examination. When the ratio...

journal_title：Investigative radiology

authors： Butto F,Burke B,Berry JM,Amplatz K,Bass JL

更新日期：1988-08-01 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

authors： Scott JR,Kramer SS,Griscom NT

更新日期：1978-07-01 00:00:00

abstract：:The authors correlated sonographic findings with histologic findings in a rabbit model of osteomyelitis. Staphylococcus aureus osteomyelitis was induced in the femora of 11 New Zealand white rabbits. The opposite leg was used as a control. Sonographic findings showed fluid adjacent to the bone in 11 cases. The fluid w...

journal_title：Investigative radiology

authors： Abiri MM,DeAngelis GA,Kirpekar M,Abou AN,Ablow RC

更新日期：1992-02-01 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：:This paper presents a microcomputer-based technique that accurately quantifies volumes from computed tomographic (CT) scans of irregularly shaped objects as well as displaying 3-D reconstructions. The method uses standard CT film, allowing analysis of previous or outside CT studies. The planimetry method showed less t...

journal_title：Investigative radiology

authors： Albright RE Jr,Fram EK

更新日期：1988-12-01 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

authors： Brossmann J,Koch S,Schwarzenberg H,Link J,Muhle C,Bull CC,Heller M

更新日期：1996-02-01 00:00:00

abstract：PURPOSE:The aim of this study was to develop a method to delineate the lethally frozen-tissue region (temperature less than -40°C) arising from interventional cryoablation procedures using a short tau inversion-recovery ultrashort echo-time (STIR-UTE) magnetic resonance (MR) imaging sequence. This method could serve as...

journal_title：Investigative radiology

authors： Tokuda J,Wang Q,Tuncali K,Seethamraju RT,Tempany CM,Schmidt EJ

更新日期：2020-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors analyze the origins of the "clotting issue," the controversy that began in the 1980s when contrast media, once perceived as good flushing agents for catheters because of their assumed anticoagulant properties, came under attack for allegedly causing thromboembolism. Laboratory studi...

journal_title：Investigative radiology

authors： Dawson P,Cousins C,Bradshaw A

更新日期：1993-11-01 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