Correlation of flow velocity measurements by magnetic resonance phase contrast imaging and intravascular Doppler ultrasound.

abstract：:The biliary and urinary excretion of sodium tyropanoate (Bilopaque) and sodium ipodate (Oragrafin) were studied in unanesthetized bile-fistula dogs using stepwise, increasing, intravenous infusions of the contrast materials. A constant intravenous infusion of sodium taurocholate was administered at the rate of either ...

journal_title：Investigative radiology

authors： Berk RN,Loeb PM,Cobo-Frenkel A,Barnhart JL

更新日期：1977-01-01 00:00:00

abstract：:In order to measure the accuracy of a diagnostic imaging technique, the correctness of each observer decision must be determined. This is often difficult in clinical cases, and various strategies are frequently used to approximate the truth. Experiments using chest radiographs as an example are reported to show the pi...

journal_title：Investigative radiology

authors： Revesz G,Kundel HL,Bonitatibus M

更新日期：1983-03-01 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：:Using real-time ultrasound, the motions of the tongue, hyoid bone, and larynx were monitored and timed during swallowing in ten normal subjects. A well-defined propulsive wave of the tongue was observed during swallowing a 5-cc water bolus. The body of the hyoid bone was identified on the ultrasound scan as a high ech...

journal_title：Investigative radiology

authors： Shawker TH,Sonies B,Hall TE,Baum BF

更新日期：1984-03-01 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：OBJECTIVES:The objective of this study was to evaluate the correlation between dynamic gadoxetic acid-enhanced magnetic resonance imaging parameters and specific uptake values (SUVs) derived from ¹⁸fluorodeoxyglucose (¹⁸F-FDG) and ⁶⁸Ga-DOTA-Tyr(3)-octreotate (⁶⁸Ga-DOTATATE) positron emission tomography/computed tomogra...

journal_title：Investigative radiology

authors： Armbruster M,Sourbron S,Haug A,Zech CJ,Ingrisch M,Auernhammer CJ,Nikolaou K,Paprottka PM,Rist C,Reiser MF,Sommer WH

更新日期：2014-01-01 00:00:00

abstract：:Using a 1.5 T magnetic resonance imaging (MRI) system, cine phase-contrast and magnitude images were obtained in three phantoms that simulated different anatomic configurations of aortic dissection. The dissection phantoms were made of compliant materials, and pulsatile flow was used in all experiments. Phantoms diffe...

journal_title：Investigative radiology

authors： Iwai F,Sostman HD,Evans AJ,Nadel SN,Hedlund LW,Beam CA,Charles HC,Spritzer CE

更新日期：1991-12-01 00:00:00

abstract：:The study aim was to define potential differences and advantages in magnetic resonance (MR) patterns of tumoral contrast enhancement using either a small molecular, extracellular fluid contrast enhancer [Gd-DTPA] or a macromolecular agent [albumin-(Gd-DTPA)20], designed for primary intravascular biodistribution. MR im...

journal_title：Investigative radiology

authors： Wikström MG,Moseley ME,White DL,Dupon JW,Winkelhake JL,Kopplin J,Brasch RC

更新日期：1989-08-01 00:00:00

abstract：OBJECTIVES:The aims of this study were to analyze the effect of dual-energy computed tomography (DECT) scanners and fluid characteristics on iodine quantification and to calculate the measurement variability range induced by those variables. METHODS:We performed an experimental phantom study with 4 mediastinal iodine ...

journal_title：Investigative radiology

authors： Kim H,Goo JM,Kang CK,Chae KJ,Park CM

更新日期：2018-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the use of a new thrombus-specific ultrasound contrast agent, MRX-408, in the ultrasonic detection of thrombus in arteriovenous (AV) fistulae. METHODS:Six purpose-bred mongrels with two AV fistulae each were imaged with gray-scale ultrasound 7 weeks after graft implantation before ...

journal_title：Investigative radiology

authors： Unger E,Metzger P 3rd,Krupinski E,Baker M,Hulett R,Gabaeff D,Mills J,Ihnat D,McCreery T

更新日期：2000-01-01 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

authors： Lasser EC,Lang JH,Hamblin AE,Rosen L

更新日期：1975-07-01 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

authors： Lawson TL,Gomez JA,Margulis AR

更新日期：1975-05-01 00:00:00

abstract：:The importance of evaluating medical student performance has been widely addressed in the medical education literature. Multiple-choice examinations are the preferred method of testing because they are easy to administer and score. Development of parallel or equivalent pre- and post-examinations provides objective inf...

journal_title：Investigative radiology

authors： Blane CE,Calhoun JG,Vydareny KH

更新日期：1986-09-01 00:00:00

abstract：:Because of the strong scientific evidence in support of radiation hormesis, we can no longer ignore this concept. There is, however, need for additional, carefully documented investigations in selected biological systems exposed to LLIR if the matter of radiation hormesis is to be settled once and for all. This need s...

journal_title：Investigative radiology

authors： Loken MK,Feinendegen LE

更新日期：1993-05-01 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：: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：RATIONALE AND OBJECTIVE:The purpose of this study was to investigate the feasibility, efficacy, and safety of ultrasound-guided percutaneous cryotherapy of stage T1 breast cancers. MATERIALS AND METHODS:Thirty patients with biopsy-confirmed breast cancers with tumor diameters of 15 mm or smaller (range, 5-15 mm; media...

journal_title：Investigative radiology

authors： Pfleiderer SO,Marx C,Camara O,Gajda M,Kaiser WA

更新日期：2005-07-01 00:00:00

abstract：OBJECTIVE:To evaluate the effectiveness of a dual magnetic resonance-near infrared fluorescence optical imaging agent, poly(l-glutamic acid)-DTPA-Gd-NIR813, for both preoperative and intraoperative visualization and characterization of sentinel lymph nodes (SLN) in mice. MATERIALS AND METHODS:Poly(L-glutamic acid) was...

journal_title：Investigative radiology

authors： Melancon MP,Wang Y,Wen X,Bankson JA,Stephens LC,Jasser S,Gelovani JG,Myers JN,Li C

更新日期：2007-08-01 00:00:00

abstract：:The potential risk of a radiologic procedure often is compared with the potential benefit of the procedure. While risk vs. benefit analysis has been useful as a step toward increased communication and understanding among radiologists, referring physicians, and the general public, it has the disadvantage that risk and ...

journal_title：Investigative radiology

authors： Ritenour ER,Hendee WR

更新日期：1989-01-01 00:00:00

abstract：OBJECTIVE:With the introduction of ultrashort echo time (UTE) sequences solid polymeric materials might become visible on clinical whole-body magnetic resonance (MR) scanners. The aim of this study was to characterize solid polymeric materials typically used for instruments in magnetic resonance guided interventions an...

journal_title：Investigative radiology

authors： Springer F,Martirosian P,Schwenzer NF,Szimtenings M,Kreisler P,Claussen CD,Schick F

更新日期：2008-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Our purpose was to validate contrast-enhanced computed tomography (CECT)-derived quantitative measures of perfusion and permeability against gold standard techniques of fluorescent microspheres and Evan's Blue dye, respectively. MATERIALS AND METHODS:Normal and tumor-bearing (R3230AC) Fischer ...

journal_title：Investigative radiology

authors： Pollard RE,Garcia TC,Stieger SM,Ferrara KW,Sadlowski AR,Wisner ER

更新日期：2004-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To investigate the capacity of manganese dipyridoxyl diphosphate (MnDPDP)-enhanced magnetic resonance imaging (MRI) to discriminate the injured myocardium from the normal myocardium in a cat model. MATERIALS AND METHODS:Fourteen cats were prepared for acute myocardial infarction with 90-minute...

journal_title：Investigative radiology

authors： Kim TH,Yang DH,Choi JW,Kim ST,Yoon JH,Shin JH,Seo JB,Gong GY,Lim TH

更新日期：2005-01-01 00:00:00

abstract：:In vitro incompatibilities between nine water-soluble contrast media and 21 intravascular pharmacologic agents were investigated using naked-eye observation and a centrifuge. Most of the previously reported incompatibilities were verified, and a few new incompatibilities were discovered: phentolamine mesylate with dia...

journal_title：Investigative radiology

authors： Kim SH,Lee HK,Han MC

更新日期：1992-01-01 00:00:00

abstract：OBJECTIVE:The objective of this study was to evaluate the diagnostic performance and safety of magnetic resonance (MR) imaging-guided percutaneous mediastinal biopsy procedures using a 0.23-T open MR system with optical tracking navigation. MATERIALS AND METHODS:A retrospective analysis of 59 participants (38 males an...

journal_title：Investigative radiology

authors： Lü Y,Fritz J,Li C,Liu M,Lee P,Wu L,Carrino JA

更新日期：2013-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Laser-induced interstitial thermotherapy (LITT) may become an attractive modality for minimally invasive tumor therapy. Magnetic resonance imaging (MRI) could be used to assist this procedure. METHODS:A T1-weighted turbo fast low-angle shot (FLASH) sequence for on-line monitoring of the laser-...

journal_title：Investigative radiology

authors： Gewiese B,Beuthan J,Fobbe F,Stiller D,Müller G,Böse-Landgraf J,Wolf KJ,Deimling M

更新日期：1994-03-01 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：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：OBJECTIVES:To evaluate the performance of black-blood diffusion-weighted (DW)-EPI sequences with parallel imaging for the detection of focal liver lesions in comparison with a standard T2-weighted (T2-w) sequence. MATERIALS AND METHODS:Twenty patients with known or suspected focal liver lesions underwent liver MRI usi...

journal_title：Investigative radiology

authors： Zech CJ,Herrmann KA,Dietrich O,Horger W,Reiser MF,Schoenberg SO

更新日期：2008-04-01 00:00:00

abstract：:With the ongoing development of new contrast agents, questions develop concerning the cardiac effects of these drugs. We used the perfused rat heart model to investigate the effects on cardiac and coronary function of hypertonic ionic (sodium chloride) and nonionic (glucose) solutions and conventional and low osmolali...

journal_title：Investigative radiology

authors： Fleetwood G,Bettmann MA,Gordon JL

更新日期：1990-03-01 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