Quantitative evaluation of perfusion and permeability of peripheral tumors using contrast-enhanced computed tomography.

abstract：RATIONALE AND OBJECTIVES:Density of trabecular bone structures in human heel bones was assessed by 3D magnetic resonance (MR) gradient echo imaging (GEI) with multiple echoes. Different spatial resolutions were applied to investigate the influence of the pixel size on signal characteristics in GEI and to find suitable ...

journal_title：Investigative radiology

authors： Machann J,Schnatterbeck P,Raible A,Lutz O,Claussen CD,Schick F

更新日期：2000-07-01 00:00:00

abstract：OBJECTIVES:To investigate image quality and interstudy reproducibility of aortic atherosclerosis imaging at 1.5 T, and to explore the impact of parallel imaging techniques at 3 T. MATERIALS AND METHODS:Institutional review board approval and informed consent were obtained. Thirty-two subjects (20 normal, 12 patients w...

journal_title：Investigative radiology

authors： Maroules CD,McColl R,Khera A,Peshock RM

更新日期：2008-09-01 00:00:00

abstract：RATIONAL AND OBJECTIVES:Magnetic resonance (MR) scan technique and lesion detectability were evaluated using a newly developed spinal abscess model in the New Zealand White rabbit. METHODS:To create the lesion, an epidural needle was inserted under fluoroscopic guidance in the lumbar region and advanced to penetrate t...

journal_title：Investigative radiology

authors： Runge VM,Williams NM,Lee C,Timoney JF

更新日期：1998-04-01 00:00:00

abstract：:Pyelovenous and pyelolymphatic backflow have been observed during retrograde pyelography in three patients with renal vein thrombosis. The radiographic patterns of backflow following experimental unilateral renal vein occlusion in rabbits were analyzed and correlated with the clinical findings. Capsular, perihilar, pe...

journal_title：Investigative radiology

authors： Bidgood WD Jr,Cuttino JT Jr,Clark RL,Volberg FM

更新日期：1981-01-01 00:00:00

abstract：:Altered concentrations of brain beta endorphin and spinal cord encephalin have been reported in mice with iatrogenic arachnoiditis. We measured beta-endorphin concentration in cerebrospinal fluid (CSF) in normal monkeys and in monkeys with various degrees of arachnoiditis resulting from myelography and spinal surgery ...

journal_title：Investigative radiology

authors： Lipman BT,Haughton VM

更新日期：1988-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study evaluating a cesium iodide-amorphous silicon-based flat-panel detector was to optimize the x-ray spectrum for chest radiography combining excellent contrast-detail visibility with reduced patient exposure. MATERIALS AND METHODS:A Lucite plate with 36 drilled holes of ...

journal_title：Investigative radiology

authors： Hamer OW,Völk M,Zorger N,Borisch I,Büttner R,Feuerbach S,Strotzer M

更新日期：2004-10-01 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：:Milestones in the history of phlebography are shortly reviewed. The present state of phlebography with emphasis upon the role of new nonionic contrast media is presented. ...

journal_title：Investigative radiology

authors： Enge I

更新日期：1985-01-01 00:00:00

abstract：:Diagnostic radiology is expanding, playing an increasingly central role in patient care, which heightens the importance of radiology teaching in undergraduate medical education. This study examined the impact of increased structure and systematic evaluation on student performance in a radiology elective. The evaluatio...

journal_title：Investigative radiology

authors： Blane CE,Calhoun JG,Maxim BR,Martel W,Davis WK

更新日期：1985-05-01 00:00:00

abstract：PURPOSE:The aim was to investigate the feasibility and image quality of prospective respiratory gating for 3-D computed tomography (CT) of the lung. MATERIAL AND METHODS:Eight anesthetized pigs underwent prospectively gated multidetector computed tomography using 2 devices: a charge-coupled device (CCD) camera and a l...

journal_title：Investigative radiology

authors： Zaporozhan J,Ley S,Unterhinninghofen R,Saito Y,Fabel-Schulte M,Keller S,Szabo G,Kauczor HU

更新日期：2006-05-01 00:00:00

abstract：OBJECTIVE:The aim of this study was to evaluate the potential of iterative metal artifact reduction (IMAR) for the improvement of computed tomography (CT)-based position emission tomography (PET) attenuation correction in the vicinity of metal implants and compare it with dual-energy-based metal artifact reduction stra...

journal_title：Investigative radiology

authors： Schabel C,Gatidis S,Bongers M,Hüttig F,Bier G,Kupferschlaeger J,Bamberg F,la Fougère C,Nikolaou K,Pfannenberg C

更新日期：2017-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The basic characteristics of BR1, a novel echo contrast agent based on stabilized sulfur hexafluoride (SF6) microbubbles have been evaluated. METHODS:The authors determined the physicochemical properties (bubble concentration, bubble size distribution, resistance to pressure, and stability) an...

journal_title：Investigative radiology

authors： Schneider M,Arditi M,Barrau MB,Brochot J,Broillet A,Ventrone R,Yan F

更新日期：1995-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:This study was conducted to determine whether significant reduction in radiation dose (250 mAs-->50 mAs), in chest computed tomography (CT) using volume acquisition affects image quality or the detectability of pathologic findings in the lung and mediastinum. METHODS:Phantom studies were condu...

journal_title：Investigative radiology

authors： Takahashi M,Maguire WM,Ashtari M,Khan A,Papp Z,Alberico R,Campbell W,Eacobacci T,Herman PG

更新日期：1998-02-01 00:00:00

abstract：:Radiolabeled ioversol was injected intravenously into two male and two female beagle dogs (6.7 to 10.4 kg) at two dose levels each (0.2 and 1.0 g I/kg). Blood levels of radioactivity were monitored at 2, 5, 10, 20, 40, 60, 90, and 120 minutes and at one and two days. Urine and feces were collected in metabolism cages ...

journal_title：Investigative radiology

authors： Coveney JR,Robbins MS

更新日期：1989-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:A new hepatobiliary gadolinium chelate, gadolinium (Gd) 2,5-BPA-DO3A, was compared in two animal species with Gd HP-DO3A (gadoteridol), a clinically approved extracellular contrast agent, and Gd Cy2-DOTA, a second hepatobiliary chelate in preclinical development. The ligand in Gd 2,5-BPA-DO3A i...

journal_title：Investigative radiology

authors： Runge VM,Wells JW,Williams NM

更新日期：1996-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the attenuation, size, and volume of the pericardial sinuses and recesses by using electrocardiographically triggered, noncontrast-enhanced electron beam tomography (EBT) and to consider its relation with sex, age, and heart volume. METHODS:Findings in 213 consecutive patients with...

journal_title：Investigative radiology

authors： Budoff MJ,Lu B,Mao S,Bakhsheshi H,Zhuang N,Liu SC,French WJ

更新日期：2000-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the changes in the microbubble population of a currently available ultrasound contrast agent (USCA) through attenuation measurements to optimize its clinical use. MATERIALS AND METHODS:The microbubble population from a galactose-based USCA (Levovist, Schering AG, Germany) was chara...

journal_title：Investigative radiology

authors： Correas JM,Kurtisovski E,Bridal SL,Amararene A,Hélénon O,Berger G

更新日期：2002-12-01 00:00:00

abstract：PURPOSE:The aim of this study was to evaluate the feasibility of a prototype volume-interpolated breath-hold examination (VIBE) sequence using compressed sensing (VIBECS) for rapid multiphase arterial magnetic resonance imaging (MRI) at different temporal resolution during free-breathing in comparison with a convention...

journal_title：Investigative radiology

authors： Weiss J,Notohamiprodjo M,Taron J,Martirosian P,Nickel D,Bamberg F,Nikolaou K,Othman AE

更新日期：2018-10-01 00:00:00

abstract：OBJECTIVES:The aim of this study was to compare F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/magnetic resonance (MR) (with and without diffusion-weighted imaging [DWI]) to F-FDG PET/computed tomography (CT), with regard to the assessment of nodal and extranodal involvement, in patients with Hodgkin lym...

journal_title：Investigative radiology

authors： Giraudo C,Raderer M,Karanikas G,Weber M,Kiesewetter B,Dolak W,Simonitsch-Klupp I,Mayerhoefer ME

更新日期：2016-03-01 00:00:00

abstract：OBJECTIVE:The objective of this study was to validate quantitation of R2* and DeltaR2* measurements obtained with a 3-dimensional (3-D) multiple gradient-recalled echo (mGRE) sequence for evaluating intrarenal oxygenation in humans. MATERIALS AND METHODS:Validation was accomplished (1) by comparing R2* values with pre...

journal_title：Investigative radiology

authors： Tumkur S,Vu A,Li L,Prasad PV

更新日期：2006-02-01 00:00:00

abstract：OBJECTIVES:Volumetric magnetic resonance (MR)-guided high-intensity focused ultrasound (HIFU) is a completely noninvasive image-guided thermal ablation technique. Recently, there has been growing interest in the use of MR-HIFU for noninvasive ablation of malignant tumors. Of particular interest for noninvasive ablation...

journal_title：Investigative radiology

authors： Wijlemans JW,Deckers R,van den Bosch MA,Seinstra BA,van Stralen M,van Diest PJ,Moonen CT,Bartels LW

更新日期：2013-06-01 00:00:00

abstract：OBJECTIVE:To demonstrate a method of assessing radiologic diagnostic agreement utilizing multiple blinded external readers. METHODS:Six body CT studies interpreted by one reader (primary reader) at the host institution were compiled with patient identifiers removed. Brief clinical histories that were available to the ...

journal_title：Investigative radiology

authors： Ryan AF,Semelka RC,Molina PL,Yonkers S,Vaidean G

更新日期：2010-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To determine whether vascular endothelial growth factor (VEGF) is a histopathological factor influencing contrast enhancement of hepatocellular carcinoma (HCC) on computed tomography (CT). METHODS:Twenty-two nodular HCCs underwent multiphase helical CT and surgery. Tumor size, histological gra...

journal_title：Investigative radiology

authors： Kwak BK,Shim HJ,Park ES,Kim SA,Choi D,Lim HK,Park CK,Chung JW,Park JH

更新日期：2001-08-01 00:00:00

abstract：OBJECTIVE:To compare image quality and geometric distortion between readout-segmented diffusion-weighted imaging (rs-DWI) and selective-excitation accelerated reduced-field of view (FOV) DWI (sTX-DWI) of the prostate. MATERIALS AND METHODS:Sixty-five patients underwent 3-T MRI of the prostate including rs-DWI and sTX-...

journal_title：Investigative radiology

authors： Barth BK,Cornelius A,Nanz D,Eberli D,Donati OF

更新日期：2015-11-01 00:00:00

abstract：:Proposed causes of renal papillary necrosis (RPN) include tubular toxicity due to hyperconcentration of toxins in the renal medulla and vasoconstriction of medullary vessels with ischemic necrosis. The authors studied these mechanisms in bromoethylamine hydrobromide-induced RPN in rats by microvascular and tubular mic...

journal_title：Investigative radiology

authors： Cuttino JT Jr,Goss FU,Clark RL,Marr MC

更新日期：1981-03-01 00:00:00

abstract：:Fractures modeled in the dried skull indicate that the initial plane of computed tomography (CT) section contributes to the accuracy of three-dimensional (3D) images generated from two-dimensional (2D) CT data. The authors retrospectively analyzed seven clinical cases of tripod zygomatic fractures that were imaged wit...

journal_title：Investigative radiology

authors： Levy RA,Kellman RM,Rosenbaum AE

更新日期：1991-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To develop a new animal model for the evaluation of the renal tolerance of contrast agent and its application to diatrizoate and iotrolan injections in comparison to saline and mannitol solution. MATERIALS AND METHODS:The nephrotoxic potential of intravenously injected contrast agents in Beagl...

journal_title：Investigative radiology

authors： Krause W,Gilles T

更新日期：2003-11-01 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：OBJECTIVES:The aim of this pilot study was to assess post-treatment apparent diffusion coefficient (ADC) changes of diffuse large B-cell lymphoma lesions on respiratory-gated whole-body diffusion-weighted imaging (DWI), with integrated (18)F-fluoro-2-deoxyglucose positron emission tomography/computed tomography (PET/CT...

journal_title：Investigative radiology

authors： Lin C,Itti E,Luciani A,Zegai B,Lin SJ,Kuhnowski F,Pigneur F,Gaillard I,Paone G,Meignan M,Haioun C,Rahmouni A

更新日期：2011-05-01 00:00:00

abstract：:Breast calcification diagnosis was studied by using clinical findings and computerized image processing of a mammogram in a network of trained expert learning systems (Outcome Advisor [OA]). The system was tested with records not used for training and performance was compared with radiologist. The network was 72% accu...

journal_title：Investigative radiology

authors： Patrick EA,Moskowitz M,Mansukhani VT,Gruenstein EI

更新日期：1991-06-01 00:00:00