Comparison of Power Versus Manual Injection in Bolus Shape and Image Quality on Contrast-Enhanced Magnetic Resonance Angiography: An Experimental Study in a Swine Model.

abstract：OBJECTIVE:Computed tomography (CT) and magnetic resonance imaging (MRI) are introduced as an alternative to traditional autopsy. The purpose of this study was to investigate their accuracy in mass estimation of liver and spleen. METHODS:In 44 cases, the weights of spleen and liver were estimated based on MRI and CT da...

journal_title：Investigative radiology

authors： Jackowski C,Thali MJ,Buck U,Aghayev E,Sonnenschein M,Yen K,Dirnhofer R,Vock P

更新日期：2006-07-01 00:00:00

abstract：:Even though we have made much progress over the last decade, much still needs to be done. I am personally very pleased with the excellent management and authority of my coauthor, Joe Frank, in assuming the Acting Directorship of our DRRP. You will be hearing more from him in the immediate future about this research pr...

journal_title：Investigative radiology

authors： Putman CE,Frank JA

更新日期：1993-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To measure the hepatic uptake and biliary elimination kinetics of gadolinium (Gd)-EOB-DTPA in dogs. METHOD:Two groups of four beagles each were anesthetized and given an intravenous bolus of 25 mumol/kg or 250 mumol/kg of Gd-EOB-DTPA. Blood, hepatic bile, and urine were collected over 140 minu...

journal_title：Investigative radiology

authors： Benness G,Khangure M,Morris I,Warwick A,Burrows P,Vogler H,Weinmann HJ

更新日期：1996-04-01 00:00:00

abstract：OBJECTIVE:Hydration is widely accepted as an effective measure to prevent contrast media (CM)-induced acute kidney injury (AKI). Whether bicarbonate (NaHCO₃) infusion has a greater effect than saline is disputed. Effective prevention of CM-induced AKI by NaHCO₃ has been found by several clinical trials. However, others...

journal_title：Investigative radiology

authors： Ladwig M,Flemming B,Seeliger E,Sargsyan L,Persson PB

更新日期：2011-11-01 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

authors： Lawaczeck R,Diekmann F,Diekmann S,Hamm B,Bick U,Press WR,Schirmer H,Schön K,Weinmann HJ

更新日期：2003-09-01 00:00:00

abstract：:The residency program at the University of Pennsylvania offers a 1-month fellowship for senior residents in medical student education. Instructional philosophy, methods, and content are discussed, observed, practiced, and evaluated. Close supervision and immediate feedback provide training particularly needed by futur...

journal_title：Investigative radiology

authors： Troupin RH

更新日期：1990-06-01 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 used magnetic resonance imaging (MRI) techniques to examine the effect of meningeal trauma produced by cisterna magna puncture on the integrity of the blood-cerebrospinal fluid barrier (BCB) in a rat model. METHODS:Intravenous gadolinium-DTPA (Gd-DTPA), a relaxation rate modifier w...

journal_title：Investigative radiology

authors： Walker JD,Martin MA,Potts DG,Lemaire C,Templeton DM

更新日期：1992-04-01 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:To prospectively evaluate the safety and efficacy of combined unenhanced and gadoxetic acid disodium (Gd-EOB-DTPA)-enhanced magnetic resonance (MR) imaging compared with unenhanced MR imaging and triphasic contrast-enhanced spiral computed tomography (CT) for the detection and characterization of focal liver...

journal_title：Investigative radiology

authors： Ichikawa T,Saito K,Yoshioka N,Tanimoto A,Gokan T,Takehara Y,Kamura T,Gabata T,Murakami T,Ito K,Hirohashi S,Nishie A,Saito Y,Onaya H,Kuwatsuru R,Morimoto A,Ueda K,Kurauchi M,Breuer J

更新日期：2010-03-01 00:00:00

abstract：:Methods are presented for the quantification of spatial resolution in x-ray computed tomographic (CT) images. Model-dependent methods are derived and compared with model independent methods for computation of the Modulation Transfer Function (MTF). These techniques are applied to phantom images of point, line, edge, a...

journal_title：Investigative radiology

authors： Assimakopoulos PA,Boyd DP,Jaschke W,Lipton MJ

更新日期：1986-03-01 00:00:00

abstract：:The authors investigated the effect on the brain of red blood cells that had been modified by contrast media. Rat blood was mixed with an equivolume of contrast media, and up to 200 microL of the mixture was infused to the internal carotid artery of the rat. Evans blue was administered intravenously to assess the inte...

journal_title：Investigative radiology

authors： Miyazawa T,Nakagawa H,Oshino N

更新日期：1989-05-01 00:00:00

abstract：:The density of trabecular bone in the os calcis has been measured in 321 subjects using a gamma ray scattering technique. In normal subjects it was shown that density could be predicted from body weight and age with a standard error of 5.6%. It was also shown that the dependence of density upon weight and age was the ...

journal_title：Investigative radiology

authors： Roberts JG,DiTomasso E,Webber CE

更新日期：1982-01-01 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

authors： Thoeni RF,Goldberg HI,Moss AA,Lin SK,Brito AC

更新日期：1978-05-01 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

abstract：:The rate at which isotopes descend from the cisterna magna to the lumbar subarachnoid space is highly variable. In monkeys, with and without previous lumbar puncture, transit time was measured. In animals with a previous lumbar puncture, transit times were 10 to 120 minutes; in monkeys without a previous lumbar punctu...

journal_title：Investigative radiology

authors： Lipman B,Palmer D,Noble J,Haughton V,Collier D

更新日期：1988-05-01 00:00:00

abstract：:Recent experimental data underlies the role of hypoxic tubular injury in the pathophysiology of radiocontrast nephropathy. Although systemic transient hypoxemia, increased blood viscosity, and a leftward shift of the oxygen-hemoglobin dissociation curve may all contribute to intrarenal hypoxia, imbalance between oxyge...

journal_title：Investigative radiology

authors： Heyman SN,Reichman J,Brezis M

更新日期：1999-11-01 00:00:00

abstract：OBJECTIVE:The aims of this study were to compare 3 contrast agents and to define feasible doses for quantitative lung perfusion imaging using the dual-bolus approach in dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI). MATERIALS AND METHODS:Ten healthy volunteers (6 males, 4 females; mean age, 23.5 yea...

journal_title：Investigative radiology

authors： Veldhoen S,Oechsner M,Fischer A,Weng AM,Kunz AS,Bley TA,Köstler H,Ritter CO

更新日期：2016-03-01 00:00:00

abstract：OBJECTIVE:The objective of this study was to determine the gadolinium (Gd) concentration remaining in human bone tissue after administration of standard clinical doses of 2 Gd-based contrast agents: ProHance and Omniscan. MATERIALS AND METHODS:After administration of 0.1 mmol/kg of Gd chelate to patients undergoing hi...

journal_title：Investigative radiology

authors： White GW,Gibby WA,Tweedle MF

更新日期：2006-03-01 00:00:00

abstract：OBJECTIVES:The aim of this study was to investigate the feasibility of nonenhanced magnetic resonance angiography (MRA) of the lower extremities at 7 tesla (T). MATERIALS AND METHODS:Eight healthy volunteers were examined on a 7-T whole-body magnetic resonance system. For image acquisition, a custom-built 16-channel t...

journal_title：Investigative radiology

authors： Fischer A,Maderwald S,Orzada S,Johst S,Schäfer LC,Ladd ME,Nassenstein K,Umutlu L,Lauenstein TC

更新日期：2013-07-01 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

authors： Howland WJ,Marler D,Bosshart D

更新日期：1986-12-01 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：OBJECTIVES:To test the feasibility of combining inner-volume imaging (IVI) techniques with conventional multishot periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) techniques for targeted-PROPELLER magnetic resonance imaging. MATERIALS AND METHODS:Perpendicular section-selective ...

journal_title：Investigative radiology

authors： Deng J,Larson AC

更新日期：2009-08-01 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：: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：RATIONALE AND OBJECTIVES:High signal intensity in the basal ganglia on T1-weighted MR imaging has been reported in chronic manganese (Mn) poisoning. However, the exact meaning of the high signal intensity remains unclear: does it result from Mn itself, secondary pathologic changes of the brain tissue, or both? The goal...

journal_title：Investigative radiology

authors： Kim SH,Chang KH,Chi JG,Cheong HK,Kim JY,Kim YM,Han MH

更新日期：1999-06-01 00:00:00

abstract：OBJECTIVES:The objective of this study was to assess the feasibility of the combination of magnetic resonance (MR)-guided biopsy (MRGB) and diagnostic 3T MR imaging in the localization of local recurrence of prostate cancer (PCa) after external beam radiation therapy (EBRT). MATERIALS AND METHODS:Twenty-four consecuti...

journal_title：Investigative radiology

authors： Yakar D,Hambrock T,Huisman H,Hulsbergen-van de Kaa CA,van Lin E,Vergunst H,Hoeks CM,van Oort IM,Witjes JA,Barentsz JO,Fütterer JJ

更新日期：2010-03-01 00:00:00

abstract：:A silicone gel phantom material is described. It can be molded into any shape and it can contain internal cavities. The material is selfsealing allowing the cavities to be filled with liquids. A simple geometric phantom consisting of a rectangular solid with a single internal spherical cavity was fabricated and imaged...

journal_title：Investigative radiology

authors： Goldstein DC,Kundel HL,Daube-Witherspoon ME,Thibault LE,Goldstein EJ

更新日期：1987-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Two independent gold standards and diagnoses from three-dimensional computed tomography (CT) images were used to examine the possibility that craniosynostosis is a binary abnormality that potentially may be diagnosed without error. METHODS:Surgical reports, histology of excised sutures, and th...

journal_title：Investigative radiology

authors： Pilgram TK,Vannier MW,Marsh JL,Kraemer BB,Rayne SC,Gado MH,Moran CJ,McAlister WH,Shackelford GD,Hardesty RA

更新日期：1994-10-01 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