The effects of orientation on volume measurements of human left ventricular casts.

abstract：RATIONALE AND OBJECTIVES:To evaluate the feasibility of mechanical thrombectomy in occluded hemodialysis access shunts by using a newly developed 5F pigtail rotation catheter. METHODS:Thrombosed hemodialysis access shunts were simulated by clotted bovine blood in silicone tubing (diameter 6 mm). After retrograde and a...

journal_title：Investigative radiology

authors： Wildberger J,Schmitz-Rode T,Wein BB,Günther RW

更新日期：1999-07-01 00:00:00

abstract：:The authors compared the renal toxicity of the low osmolality radiocontrast agents, iohexol and ioxaglate, and the ionic agent, iothalamate, at equivalent iodine dose, using experimental models in vitro and in vivo. In isolated perfused rat kidneys, all agents induced comparable biphasic hemodynamic changes, associate...

journal_title：Investigative radiology

authors： Brezis M,Greenfeld Z,Herman M,Meyer JJ,Heyman SN,Rosen S

更新日期：1991-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors synthesized and tested a novel hydrogel system proposed for use in extra- and intravascular radiologic interventions, such as chemoembolizations and embolizations, and as a vehicle for sustained drug release. MATERIALS:The material was specifically designed to meet the prerequisite...

journal_title：Investigative radiology

authors： Weissleder R,Bogdanov A,Frank H,Nossiff N,Bogdanova A,Schaffer BK,Brady T,Wittenberg J

更新日期：1993-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The suitability of paramagnetic complexes as magnetic resonance contrast agents depends on various factors such as their relaxivity, stability, selectivity, and the inertness toward transmetallation by endogenous ions. The transmetallation of a series of 18 gadolinium complexes by the Zn2+ ion ...

journal_title：Investigative radiology

authors： Laurent S,Elst LV,Copoix F,Muller RN

更新日期：2001-02-01 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: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

abstract：:Urine samples were collected from 200 subjects undergoing intravenous pyelography. The urine histamine levels were compared with those of 132 normal control subjects, 11 subjects with systemic mastocytosis, six subjects with idiopathic anaphylaxis, and ten subjects experiencing mild anaphylactic reactions during aller...

journal_title：Investigative radiology

authors： Kaliner M,Dyer J,Merlin S,Shelton A,Greenhill A,Treadwell G,McKenna W,Lieberman P

更新日期：1984-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To test noninvasive inductive heating of implanted vascular stents as an alternative approach for reduction or prevention of neointimal hyperplasia. METHODS:Calorimetric pretests were performed to get an orientation on the different parameters of influence for inductive heating of stents. The ...

journal_title：Investigative radiology

authors： Floren MG,Günther RW,Schmitz-Rode T

更新日期：2004-05-01 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：:An isotopic radiation source 125I was investigated for use in soft tissue radiaography, with particular attention to possible use in mammography for mass screening. Film sensitivities, exposure rates, absorbed doeses, contrast and resolution were determined, and compared to conventional x-ray units. It was found that ...

journal_title：Investigative radiology

authors： Fairchild R,Atkins HL,Lebowitz E,Greenberg D

更新日期：1975-09-01 00:00:00

abstract：:We present a new method for evaluating in vivo changes in bone mineralization in the peripheral skeleton, using computed tomography (CT). A set of bone mineralization indices are generated from numerous CT images of the patient's distal radius. The cross-sectional anatomy displayed by the CT scan allows for separate e...

journal_title：Investigative radiology

authors： Orphanoudakis SC,Jensen PS,Rauschkolb EN,Lang R,Rasmussen H

更新日期：1979-03-01 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：RATIONALE AND OBJECTIVES:It is widely believed that down-sizing catheters, and possibly needles, will decrease damage to the entry vessel in the performance of angiography. The purposes of this in vitro experiment are to determine if smaller needles produce less arterial wall damage than larger needles and to assess th...

journal_title：Investigative radiology

authors： Smith DC,Hamlin JA,Jensen DA,Pappas JM,Westengard JC,Saukel GW

更新日期：1992-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Tissue contrast phenomenology was investigated analytically and clinically for a class of magnetic resonance (MR) pulse sequences we call large-tip-angle (LTA) spin-echo (SE) imaging. In comparison to traditional SE sequences (denoted 90 degrees-180 degrees-echo), the LTA sequence is of the for...

journal_title：Investigative radiology

authors： Elster AD,Provost TJ

更新日期：1993-10-01 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：:The interdisciplinary approach to medical education has often been deficient in medical school curricula. Because of the nonintegrated approach to medical education, problem solving capabilities are not fostered. The clinical presentation of a patient, the imaging modalities used to investigate the patient, and the ul...

journal_title：Investigative radiology

authors： Oldham SA,Jacobson F

更新日期：1986-04-01 00:00:00

abstract：:Recent publications of the magnetic resonance safety profile of neurostimulators, cardiac pacemakers, and other implanted devices imply that these devices are no longer a contraindication for magnetic resonance imaging. It is very promising that patients who have these implanted devices may in the future no longer be ...

journal_title：Investigative radiology

authors： Nitz WR,Brinker G,Diehl D,Frese G

更新日期：2005-12-01 00:00:00

abstract：OBJECTIVE:Dynamic ventilation (3)He-MRI is a new method to assess pulmonary gas inflow. As differing airway diameters throughout the ventilatory cycle can influence gas inflow this study intends to investigate the influence of volume and timing of a He gas bolus with respect to the beginning of the tidal volume on insp...

journal_title：Investigative radiology

authors： Gast KK,Hawig K,Windirsch M,Markstaller K,Schreiber WG,Schmiedeskamp J,Düber C,Kauczor HU,Heussel CP

更新日期：2008-06-01 00:00:00

abstract：OBJECTIVES:The aim of this study was to assess the effectiveness of a model-based iterative reconstruction (MBIR) in improving image quality and diagnostic performance of ultralow-dose computed tomography (ULDCT) of the lung. MATERIALS AND METHODS:The institutional review board approved this study, and all patients pr...

journal_title：Investigative radiology

authors： Yamada Y,Jinzaki M,Tanami Y,Shiomi E,Sugiura H,Abe T,Kuribayashi S

更新日期：2012-08-01 00:00:00

abstract：:The authors reexamined a suspected difference in the effects of clinical information upon detection of nodules vs. more diverse lesions by directly incorporating classification specificity into detection ROC analysis. Categorical prompts, correct for specific abnormalities, led to detection superior to unprompted read...

journal_title：Investigative radiology

authors： Berbaum KS,Franken EA Jr,Dorfman DD,Barloon TJ

更新日期：1988-01-01 00:00:00

abstract：PURPOSE:We sought to prospectively evaluate the image quality and visualization of the intracranial arteries using high spatial resolution contrast-enhanced magnetic resonance angiography (CE-MRA) at 3 T and to perform intraindividual comparison with time-of-flight (TOF) MRA and multislice CT angiography (CTA). MATERI...

journal_title：Investigative radiology

authors： Villablanca JP,Nael K,Habibi R,Nael A,Laub G,Finn JP

更新日期：2006-11-01 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:Echogenic antibody-conjugated anionic liposomes have been developed that allow directed tissue targeting and acoustic enhancement. These are not efficient for gene delivery. A cationic formulation that allows directed gene delivery while retaining acoustic properties may provide more efficient ...

journal_title：Investigative radiology

authors： Tiukinhoy SD,Mahowald ME,Shively VP,Nagaraj A,Kane BJ,Klegerman ME,MacDonald RC,McPherson DD,Matsumura JS

更新日期：2000-12-01 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：:Observation of the relaxivity of MRI contrast media over a wide range of magnetic fields is not only necessary for predicting their efficiency at any field but also compulsory for understanding and improving their mechanisms of action. The best experimental approach to this problem is the field cycling method, which a...

journal_title：Investigative radiology

authors： Muller RN,Vander Elst L,Rinck PA,Vallet P,Maton F,Fischer H,Roch A,Van Haverbeke Y

更新日期：1988-09-01 00:00:00

abstract：:Previous work has shown that Fe3+, when administered in the proper dose and time sequence, increases the tumor uptake of gallium-67 (67Ga) while decreasing its uptake by normal tissues. The purpose of this series of experiments was to examine further the postulate that the false carrier effect is mediated at the cellu...

journal_title：Investigative radiology

authors： Stern PH,Halpern SE,Hagan PL,Chen A

更新日期：1982-07-01 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：OBJECTIVE:The purpose of this study was to assess the effects of gadolinium (Gd3+), provided as gadolinium chloride, on fibroblast function. MATERIALS AND METHODS:Human dermal fibroblasts in monolayer culture and intact skin in organ culture were exposed to the lanthanide metal (1-20 μM). RESULTS:Increased proliferat...

journal_title：Investigative radiology

authors： Bhagavathula N,Dame MK,DaSilva M,Jenkins W,Aslam MN,Perone P,Varani J

更新日期：2010-12-01 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：: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