Comparing kidney perfusion using noncontrast arterial spin labeling MRI and microsphere methods in an interventional swine model.

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：RATIONALE AND OBJECTIVES:Paclitaxel added to angiographic contrast medium (CM) has been shown to inhibit restenosis in the porcine coronary overstretch model. This study determined early local tissue concentrations after the administration of different paclitaxel doses and preparations. MATERIALS AND METHODS:Fifteen p...

journal_title：Investigative radiology

authors： Speck U,Scheller B,Abramjuk C,Grossmann S,Mahnkopf D,Simon O

更新日期：2004-03-01 00:00:00

abstract：:We compared the damage resulting from intradermal injection of four commonly used radiographic contrast media in laboratory rats. Sixty percent meglumine diatrizoate (Reno M 60) and ioxaglate (Hexabrix) produced significantly more ulceration and crusting on gross inspection and more necrosis, edema, and hemorrhage on ...

journal_title：Investigative radiology

authors： Cohan RH,Leder RA,Bolick D,Herzberg AJ,Hedlund LW,Wheeler CT,Helms MJ,Dunnick NR

更新日期：1990-05-01 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

authors： Uzümcü M,van der Geest RJ,Swingen C,Reiber JH,Lelieveldt BP

更新日期：2006-01-01 00:00:00

abstract：:Observer performance in radiologic interpretation has traditionally been based upon Receiver Operating Characteristic (ROC) analysis. A statistical method that evaluates the reproducibility or consistency of radiologic interpretation is presented. Since this method is not based upon pathologic verification, it cannot ...

journal_title：Investigative radiology

authors： Herman S,DeBoer G,Rideout DF,Majesky IF

更新日期：1984-11-01 00:00:00

abstract：:Post-angioplasty restenosis (PARS) in atherosclerotic lesions of medium and small arteries occurs in about one-third of cases in the first year following percutaneous transluminal angioplasty (PTA) (early PARS). PARS includes acute spasm, dissection with reclosure, elastic recoil, fibrocellular proliferative response,...

journal_title：Investigative radiology

authors： Becker GJ,Lee BI,Waller BF,Barry KJ,Kaplan J,Connolly R,Dreesen RG,Nardella P

更新日期：1988-11-01 00:00:00

abstract：OBJECTIVES:The aims of this study were to present a deep learning approach for the automated classification of multiple sclerosis and its mimics and compare model performance with that of 2 expert neuroradiologists. MATERIALS AND METHODS:A total of 268 T2-weighted and T1-weighted brain magnetic resonance imagin scans ...

journal_title：Investigative radiology

authors： Rocca MA,Anzalone N,Storelli L,Del Poggio A,Cacciaguerra L,Manfredi AA,Meani A,Filippi M

更新日期：2020-10-26 00:00:00

abstract：RATIONALE AND OBJECTIVES:The reflux of ethanol into the peritoneal cavity during percutaneous ethanol injection therapy (PEIT) of liver neoplasms may cause pain and other side effects. This article studies the optimal injection technique to minimize the reflux of ethanol. METHODS:A technique using normal postmortem pi...

journal_title：Investigative radiology

authors： Vehmas T

更新日期：1992-11-01 00:00:00

abstract：OBJECTIVE:The aim of this study was to compare changes in the signal intensity (SI) ratio of the dentate nucleus (DN) to the pons, DN to cerebrospinal fluid (CSF), and globus pallidus (GP) to thalamus on unenhanced T1-weighted magnetic resonance imaging (MRI) scans after serial injections of the macrocyclic gadolinium-...

journal_title：Investigative radiology

authors： Radbruch A,Weberling LD,Kieslich PJ,Hepp J,Kickingereder P,Wick W,Schlemmer HP,Bendszus M

更新日期：2015-12-01 00:00:00

abstract：:Erythrocytes at various concentrations were examined with a sensitive A-mode ultrasonic scanner; simultaneous measurements were made under light microscopic control. Individual erythrocytes caused weak (about 1 dB) echoes while erythrocyte aggregates (ten to 100 cells) produced stronger echoes (up to 15 dB), grossly p...

journal_title：Investigative radiology

authors： Alanen A,Kormano M

更新日期：1985-08-01 00:00:00

abstract：OBJECTIVES:Over the recent years, there have been increasing concerns that exposure to gadolinium-based contrast agents (GBCAs) may be associated with retention of Gd within the skin, bones, and solid organs in patients with normal renal function, although the clinical implications of this deposition remain to be estab...

journal_title：Investigative radiology

authors： Layne KA,Wood DM,Dixon-Zegeye M,Archer JRH,Raja K,Dargan PI

更新日期：2020-07-01 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

authors： Vivier PH,Storey P,Chandarana H,Yamamoto A,Tantillo K,Khan U,Zhang JL,Sigmund EE,Rusinek H,Babb JS,Bubenheim M,Lee VS

更新日期：2013-07-01 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

authors： McNamara MT,Wesbey GE,Brasch RC,Sievers R,Lipton MJ,Higgins CB

更新日期：1985-09-01 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

authors： Rolland Y,Bézy-Wendling J,Duvauferrier R,Coatrieux JL

更新日期：1999-03-01 00:00:00

abstract：:Four-hour delayed contrast-enhanced computed tomography (DCECT) shows promise for improved detection of focal liver lesions. No previous studies have examined the use of nonionic contrast materials for DCECT. The authors undertook a case-controlled study in monkeys to define the relative efficacies of iopamidol and di...

journal_title：Investigative radiology

authors： Feuerstein IM,Girton ME

更新日期：1989-10-01 00:00:00

abstract：:We evaluated the density distribution (anterior-posterior) of the right lung in 19 acutely anesthetized supine dogs using computed transmission tomography (CTT). Eleven dogs served as controls, and eight received 0.12 cc/kg of intravenously administered oleic acid. The latter were sequentially imaged over 1 hour. Nine...

journal_title：Investigative radiology

authors： Slutsky RA,Long S,Peck WW,Higgins CB,Mattrey R

更新日期：1984-05-01 00:00:00

abstract：:Blood samples from previous contrast reactors and nonreactor controls were incubated with diatrizoate and several contrast analogues. Total complement levels were assayed. All the agents caused complement activation generally proportional to their concentration. Reactors' sera responded to lower concentrations of cont...

journal_title：Investigative radiology

authors： Siegle RL,Lieberman P,Rice MC

更新日期：1983-07-01 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

authors： Short WO,Goodwill L,Taylor CW,Job C,Arthur ME,Cress AE

更新日期：1992-10-01 00:00:00

abstract：:Effectiveness of terbutaline, a potent uterine muscle relaxant, for differentiation of temporary and anatomic interstitial fallopian tube obstruction (IFTO) at hysterosalpingography (HSG) was explored. In 43 IFTO evaluated, HSG after terbutaline showed patency in only one of 16 tubes in which IFTO was caused by spasm ...

journal_title：Investigative radiology

authors： Thurmond AS,Novy M,Rösch J

更新日期：1988-03-01 00:00:00

abstract：:A patient, suffering a severe anaphylactoid reaction to contrast material injected for an intravenous pyelogram, developed a consumption coagulopathy and evidence of complement activation. Precontrast complement values suggested that the patient had been processing complement via the classical pathway, perhaps as a co...

journal_title：Investigative radiology

authors： Lasser EC,Lang JH,Lyon SG,Hamblin AE

更新日期：1980-11-01 00:00:00

abstract：:The application of intravenous, intrathecal, and inhalation enhancement techniques to the CT evaluation of the nonhuman primate (Papio cynocephalus/anubis) is described. The falx cerebri cortical vasculature, vein of Galen, straight sinus and tentorium cerebelli were defined with intravenous enhancement. Intrathecal C...

journal_title：Investigative radiology

authors： Drayer BP,Wolfson SK Jr,Rosenbaum AE,Dujovny M,Boehnke M,Cook EE

更新日期：1979-01-01 00:00:00

abstract：OBJECTIVES:Contrast-enhanced ultrasound imaging is increasingly being used in the clinic for assessment of tissue vascularity. The purpose of our study was to evaluate the effect of different contrast administration parameters on the in vivo ultrasound imaging signal in tumor-bearing mice using a maximum intensity pers...

journal_title：Investigative radiology

authors： Pysz MA,Foygel K,Panje CM,Needles A,Tian L,Willmann JK

更新日期：2011-03-01 00:00:00

abstract：OBJECTIVES:Altered systolic blood flow in the ascending aorta has been correlated with increased aortic growth in patients with bicuspid aortic valves (BAVs). We used conventional, 2-dimensional (2D) phase contrast magnetic resonance imaging (PC-MRI) to assess the relationship between altered flow and future growth in ...

journal_title：Investigative radiology

authors： Burris NS,Sigovan M,Knauer HA,Tseng EE,Saloner D,Hope MD

更新日期：2014-10-01 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：:Previous investigations in this laboratory have confirmed the observation of facial muscle twitching during intracarotid injections of nonionic contrast media (CM) in rabbits. The reaction appears to be a locally mediated effect. To further investigate this reaction, cortical electroencephalogram (EEG) and facial elec...

journal_title：Investigative radiology

authors： Whisson CC,Evill CA,Sage MR,Wilson AJ

更新日期：1990-09-01 00:00:00

abstract：:A radiographic method for use in the closed-chest dog is described which allows the quantitation of segmental mechanical performance. Previous work has shown that the area of the pressure-length loop (an approximation of a stress-strain integral) is a useful measure of the mechanical work performed by a segment of myo...

journal_title：Investigative radiology

authors： Ringertz HG,Carlsson E,Tyberg JV

更新日期：1976-11-01 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：:The authors evaluated double-blind comparative and open-label clinical trials in 1,186 patients who received ioversol to evaluate the safety and efficacy of ioversol, a new nonionic low-osmolality contrast medium, at iodine concentrations of 32%, 24%, and 16%. The results indicate that ioversol was well tolerated in a...

journal_title：Investigative radiology

authors： Benamor M,Aten EM,McElvany KD,Lankin DG,James MA,Buy-Gandal T,Harashe LT,Weinandt WJ

更新日期：1989-06-01 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:To compare gadobenate dimeglumine (Gd-BOPTA) with gadopentetate dimeglumine (Gd-DTPA) for magnetic resonance imaging of the liver. METHODS:The contrast agent Gd-BOPTA or Gd-DTPA was administered at a dose of 0.1 mmol/kg to 257 patients suspected of having malignant liver tumors. Dynamic phase ...

journal_title：Investigative radiology

authors： Kuwatsuru R,Kadoya M,Ohtomo K,Tanimoto A,Hirohashi S,Murakami T,Tanaka Y,Yoshikawa K,Katayama H

更新日期：2001-11-01 00:00:00