Evaluation of postprocessing dual-energy methods in quantitative computed tomography. Part 2. Practical aspects.

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：RATIONALE AND OBJECTIVES:The ventral sacroiliac ligament (VSL), which bridges the sacroiliac (SI) joint anteriorly, has been described as an important stabilizing structure of the joint, but no data exist regarding its assessment with routine and advanced imaging methods. The authors determine the imaging appearance of...

journal_title：Investigative radiology

authors： Jaovisidha S,Ryu KN,De Maeseneer M,Haghighi P,Goodwin D,Sartoris DJ,Resnick D

更新日期：1996-08-01 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：: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：PURPOSE:To prospectively determine the accuracy of 1.5 Tesla (T) and 3 T magnetic resonance angiography (MRA) versus digital subtraction angiography (DSA) in the depiction of infrageniculate arteries in patients with symptomatic peripheral arterial disease. PATIENTS AND METHODS:A prospective 1.5 T, 3 T MRA, and DSA co...

journal_title：Investigative radiology

authors： Diehm N,Kickuth R,Baumgartner I,Srivastav SK,Gretener S,Husmann MJ,Jaccard Y,Do do D,Triller J,Bonel HM

更新日期：2007-06-01 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：: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: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：OBJECTIVES:The incidence of coronary artery disease has been shown to be greater in patients with calcific deposits than in those without. It has been suggested that the pattern of distribution of coronary calcific deposits within coronary arteries is of greater predictive value for acute coronary events than the overa...

journal_title：Investigative radiology

authors： Wilner WT,Mazraeshahi RM,Aboshady I,Bodmann BG,Papadakis M,Kouri D,Conyers JL,Cherukuri P,Vela D,Gladish G,Gavish L,Cody DD,Frazier L,Lukovenkov S,Madjid M,Zarrabi A,Ahmed A,Willerson JT,Casscells SW,Gertz SD

更新日期：2007-11-01 00:00:00

abstract：OBJECTIVES:Magnetic resonance-guided high-intensity focused ultrasound (MR-HIFU) is a method to heat lesions noninvasively to a stable, elevated temperature and a well-suited method to induce local hyperthermia (41°C-43°C) in deep-seated tissues. Magnetic Resonance (MR) imaging provides therapy planning on anatomical i...

journal_title：Investigative radiology

authors： Kneepkens E,Heijman E,Keupp J,Weiss S,Nicolay K,Grüll H

更新日期：2017-10-01 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：OBJECTIVES:The aim of this study was to investigate if pancreatic steatosis measured by proton density fat fraction (PDFF) is associated with exocrine pancreatic function defined by fecal elastase concentrations. MATERIALS AND METHODS:A total of 1458 volunteers (777 women; age range, 21-88 years) underwent magnetic re...

journal_title：Investigative radiology

authors： Kromrey ML,Friedrich N,Hoffmann RT,Bülow R,Völzke H,Weiss FU,Lerch MM,Motosugi U,Kühn JP

更新日期：2019-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To compare technical aspects and neointima formation of a new Nitinol stent and a Wallstent. METHODS:A Nitinol sten and a Wallstent were placed into the iliac arteries of 14 sheep (total of 28 stents) and followed angiographically. Seven sheep were killed after 1 month and 7 after 4.5 months. ...

journal_title：Investigative radiology

authors： Schürmann K,Vorwerk D,Kulisch A,Stroehmer-Kulisch E,Biesterfeld S,Stopinski T,Günther RW

更新日期：1995-07-01 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:At many institutions, three-dimensional magnetic resonance imaging (MRI) is routinely used for examination of the knee. Multiplanar reconstruction (MPR) is a method of displaying three-dimensional datasets. The authors assessed the usefulness of MPR for evaluating knee MRI datasets by comparing...

journal_title：Investigative radiology

authors： Gay SB,Chen NC,Burch JJ,Gleason TR,Sagman AM

更新日期：1993-02-01 00:00:00

abstract：PURPOSE:To evaluate the dependency of tumor contrast enhancement (CE) in regard to protein-binding properties of contrast agents, using 4 different agents with a wide range of protein-binding capacities in a standardized rat brain glioma model. MATERIAL AND METHODS:Sixteen rats with implanted brain gliomas were evalua...

journal_title：Investigative radiology

authors： Wintersperger BJ,Runge VM,Tweedle MF,Jackson CB,Reiser MF

更新日期：2009-02-01 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：:Polylysine covalently linked to moieties of gadopentetate (Gd-DTPA), for use as a macromolecular blood pool marker for contrast material-enhanced magnetic resonance imaging (MRI), was characterized by means of physicochemical measurements and pharmacokinetics in rats and rabbits and compared with Gd-DTPA. Gd-DTPA-poly...

journal_title：Investigative radiology

authors： Schuhmann-Giampieri G,Schmitt-Willich H,Frenzel T,Press WR,Weinmann HJ

更新日期：1991-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the safety and pharmacokinetics of a newly developed MR contrast medium consisting of very small superparamagnetic iron oxide particles (VSOP) coated with citrate (VSOP-C184) in a clinical phase I trial. METHODS:A total of 18 healthy subjects received either VSOP-C184 (core diamete...

journal_title：Investigative radiology

authors： Taupitz M,Wagner S,Schnorr J,Kravec I,Pilgrimm H,Bergmann-Fritsch H,Hamm B

更新日期：2004-07-01 00:00:00

abstract：:The cytogenetic interactions of ionic (diatrizoate, ioxaglate) and nonionic (iohexol) contrast media (CM) with antineoplastic drugs cyclophosphamide (CPA) and carmustine (CARM) were evaluated in a rat bone marrow cell model. Male Wistar rats were anesthetized with a 6% chloral hydrate solution and divided into five gr...

journal_title：Investigative radiology

authors： Parvez Z,Moncada R,Gragasin M

更新日期：1988-05-01 00:00:00

abstract：:Arterial occlusion by direct-current transcatheter electrocoagulation (TCEC) has been developed experimentally and used successfully in clinical situations. The major shortcoming of the technique has been the lengthy time necessary for occlusion of larger arteries. In the present study we attempted to decrease the tim...

journal_title：Investigative radiology

authors： Ralston MD,Woodfield S,Halvorsen R,Pizzo SV,Thompson WM

更新日期：1982-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors studied the incidence and distribution of orthopedic injuries sustained in Operation Desert Shield and Desert Storm by evaluating whether existing diagnostic imaging modalities were sufficient to diagnose the types of musculoskeletal injuries incurred. The authors also sought to det...

journal_title：Investigative radiology

authors： Truax AL,Chandnani VP,Chacko AK,Gonzalez DM

更新日期：1997-03-01 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：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: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：: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：RATIONALE AND OBJECTIVES:Measurements of segmental contraction of the left ventricle by standard magnetic resonance imaging (MRI) and two-dimensional echocardiography involve the comparison of diastolic and systolic time frames acquired from the same imaging plane in space. As the cone-shaped left ventricle shortens al...

journal_title：Investigative radiology

authors： Pattynama PM,Doornbos J,Hermans J,van der Wall EE,de Roos A

更新日期：1992-09-01 00:00:00

abstract：OBJECTIVE:The aim of this study was to evaluate the diagnostic value of x-ray dark-field imaging in projection radiography-based depiction of pneumothoraces in the neonatal murine lung, a potentially life-threatening medical condition that requires a timely and correct diagnosis. MATERIALS AND METHODS:By the use of a ...

journal_title：Investigative radiology

authors： Hellbach K,Yaroshenko A,Willer K,Pritzke T,Baumann A,Hesse N,Auweter S,Reiser MF,Eickelberg O,Pfeiffer F,Hilgendorff A,Meinel FG

更新日期：2016-10-01 00:00:00

abstract：:We investigated the feasibility of using intravascular ultrasound imaging to analyze vascular physiology in various arterial beds. Canine superficial femoral, external iliac, and common carotid arteries were harvested and suspended and perfused in a bath of oxygenated, heated, physiologic salt solution. A 6-Fr, 20-MHz...

journal_title：Investigative radiology

authors： Wilson MW,Webb RC,Marx MV,Meyer CR,Gallagher MA,Haarer SL,Buda AJ,Williams DM

更新日期：1991-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To assess the influence of injection rates and volumes on the arrival time of contrast material (CM) in the common carotid artery, the jugular vein and the resulting arterial-venous transit time. Additionally the relationship between injection parameters and the extent of a CM plateau was evalu...

journal_title：Investigative radiology

authors： Herold T,Paetzel C,Völk M,Bachthaler M,Zorger N,Feuerbach S,Strotzer M,Lenhart M

更新日期：2004-02-01 00:00:00