Obstructive sleep apnea: diagnosis with ultrafast CT.

abstract：PURPOSE:To measure the radiologic characteristics of subtle lung nodules and develop nodule phantoms that simulate these characteristics. MATERIALS AND METHODS:From a database of chest radiographs, 16 radiographs that showed confirmed subtle lung nodules were selected. The optical density values surrounding each nodul...

journal_title：Radiology

authors： Samei E,Flynn MJ,Eyler WR

更新日期：1997-01-01 00:00:00

abstract：:Background Available methods to quantify regional dynamic thoracic function in thoracic insufficiency syndrome (TIS) are limited. Purpose To evaluate the use of quantitative dynamic MRI to depict changes in regional dynamic thoracic function before and after surgical correction of TIS. Materials and Methods Images fro...

journal_title：Radiology

authors： Tong Y,Udupa JK,McDonough JM,Wileyto EP,Capraro A,Wu C,Ho S,Galagedera N,Talwar D,Mayer OH,Torigian DA,Campbell RM

更新日期：2019-07-01 00:00:00

abstract：:Pressures were measured in the graft and the central vein during 104 consecutive angiographic examinations of failing hemodialysis grafts. Stenosis severity greater than 40% led to a statistically significant rise in graft pressure. In grafts in which all stenoses were of 40% or less severity, the systolic pressures i...

journal_title：Radiology

authors： Sullivan KL,Besarab A,Bonn J,Shapiro MJ,Gardiner GA Jr,Moritz MJ

更新日期：1993-03-01 00:00:00

abstract：:A patient with jaundice caused by obstruction of the biliary ducts by cysts in a polycystic liver is presented. Decompression of the liver cysts under ultrasound guidance resulted in a rapid decrease of the serum bilirubin level. ...

journal_title：Radiology

authors： Ergün H,Wolf BH,Hissong SL

更新日期：1980-08-01 00:00:00

abstract：:The results of percutaneous drainage of abdominal abscesses in 136 patients are analyzed, revealing a failure rate of 23% (31 patients). The mortality rate was 1.4% (two patients); the rate of serious complications was 5% (seven patients). Failure rate was lowest in critically ill patients having palliative drainage o...

journal_title：Radiology

authors： Lang EK,Springer RM,Glorioso LW 3rd,Cammarata CA

更新日期：1986-05-01 00:00:00

abstract：PURPOSE:To retrospectively compare sensitivity and specificity of magnetic resonance (MR) imaging, three-dimensional (3D) MR spectroscopy, combined MR imaging and 3D MR spectroscopy, and carbon 11 (11C)-choline positron emission tomography (PET)/computed tomography (CT) for intraprostatic tumor sextant localization, wi...

journal_title：Radiology

authors： Testa C,Schiavina R,Lodi R,Salizzoni E,Corti B,Farsad M,Kurhanewicz J,Manferrari F,Brunocilla E,Tonon C,Monetti N,Castellucci P,Fanti S,Coe M,Grigioni WF,Martorana G,Canini R,Barbiroli B

更新日期：2007-09-01 00:00:00

abstract：:Nineteen patients with unequivocal angiographic evidence of unilateral or bilateral posterior cerebral artery occulsion were scanned during the acute phase of the stroke. In 12 of them an abnormal accumulation of radioactivity was apparent on the posterior view, but only 2 also exhibited abnormal uptake on the corresp...

journal_title：Radiology

authors： Elinsiedel-Lechtape H,Lechtape-Grüter R

更新日期：1977-05-01 00:00:00

abstract：:High fecal impaction resulted in complete bowel obstruction in 2 children following renal transplantation and in one adult on chemotherapy and narcotics. The usual methods of relief failed, and water-soluble contrast enemas with a high osmolality were employed. Fluoroscopic control assured placement of the enema fluid...

journal_title：Radiology

authors： Culp WC

更新日期：1975-04-01 00:00:00

abstract：:Thrombosed arteriovenous malformations (AVMs) in children are rare lesions that may present with headaches or a seizure disorder. Thirteen patients (4 months to 21 years of age) with this lesion were examined with computed tomography (CT). In 11 patients surgical confirmation was obtained, and the other two patients w...

journal_title：Radiology

authors： Mitnick JS,Pinto RS,Lin JP,Rose H,Lieberman A

更新日期：1984-02-01 00:00:00

abstract：:An angiographic system capable of simultaneous biplane stereoscopic magnification cerebral angiography was evaluated. Stereoscopic imaging improved the morphologic depiction of aneurysms and of arteriovenous malformations. In a series of 357 patients, procedure time was reduced because the initial biplane stereoscopic...

journal_title：Radiology

authors： Kleefield J,O'Reilly GV,Barsotti JB,Brooks ML

更新日期：1987-11-01 00:00:00

abstract：:Gated radionuclide imaging with 99mTc-labeled red blood cells was employed to assess changes in right atrial (RA) volume in 17 subjects. Studies were repeated within two hours in five of 12 normal subjects and at two and ten days after infarction in five patients. Time-activity curves were generated for the RA and rig...

journal_title：Radiology

authors： Marmor A,Biello DR,Sampathkumaran KS,Geltman EM,Siegel BA,Roberts R

更新日期：1981-06-01 00:00:00

abstract：PURPOSE:To comprehensively characterize the dosimetric properties of a clinical digital breast tomosynthesis (DBT) system for the acquisition of mammographic and tomosynthesis images. MATERIALS AND METHODS:Compressible water-oil mixture phantoms were created and imaged by using the automatic exposure control (AEC) of ...

journal_title：Radiology

authors： Feng SS,Sechopoulos I

更新日期：2012-04-01 00:00:00

abstract：PURPOSE:To prospectively compare therapeutic confidence in, patient outcomes (in terms of quality of life) after, and the costs of digital subtraction angiography (DSA) with those of multi-detector row computed tomographic (CT) angiography as the initial diagnostic imaging test in patients with peripheral arterial dise...

journal_title：Radiology

authors： Kock MC,Adriaensen ME,Pattynama PM,van Sambeek MR,van Urk H,Stijnen T,Hunink MG

更新日期：2005-11-01 00:00:00

abstract：:Background Results of recent phantom studies show that variation in CT acquisition parameters and reconstruction techniques may make radiomic features largely nonreproduceable and of limited use for prognostic clinical studies. Purpose To investigate the effect of CT radiation dose and reconstruction settings on the r...

journal_title：Radiology

authors： Meyer M,Ronald J,Vernuccio F,Nelson RC,Ramirez-Giraldo JC,Solomon J,Patel BN,Samei E,Marin D

更新日期：2019-12-01 00:00:00

abstract：:Magnetic resonance imaging techniques were applied to in vivo spectroscopic analysis of spatially resolved phosphorus spectra in the cat brain to determine whether changes associated with stroke could be detected. Two-dimensional images of separate phosphorus-containing compounds, as well as spectra arising from spati...

journal_title：Radiology

authors： Maudsley AA,Hilal SK,Simon HE,Wittekoek S

更新日期：1984-12-01 00:00:00

abstract：:Microwave radiometry is a passive and noninvasive technique that allows quick detection of subcutaneous temperature changes. The feasibility of this technique for differentiating normal intravenous infusions of radiographic contrast medium from extravasations of contrast medium was tested in anesthetized dogs. Room-te...

journal_title：Radiology

authors： Shaeffer J,Sigfred SV,Sevcik MA,Grabowy RS,Gemmell LA,Hirschman AD

更新日期：1992-07-01 00:00:00

abstract：PURPOSE:To determine whether lack of visualization of the appendix on otherwise normal abdominopelvic computed tomographic (CT) images can help exclude appendicitis in the pediatric population. MATERIALS AND METHODS:The study was institutional review board approved and HIPAA compliant. One thousand one hundred thirty-...

journal_title：Radiology

authors： Garcia K,Hernanz-Schulman M,Bennett DL,Morrow SE,Yu C,Kan JH

更新日期：2009-02-01 00:00:00

abstract：PURPOSE:To investigate the effect of duration and rate of contrast material injection on aortic peak time and peak enhancement in an injection protocol in which the contrast material dose is adjusted according to patient weight. MATERIALS AND METHODS:One hundred ninety-nine patients were randomly divided into three gr...

journal_title：Radiology

authors： Awai K,Hiraishi K,Hori S

更新日期：2004-01-01 00:00:00

abstract：:Background Trends in noninvasive diagnostic imaging (NDI) utilization rates have predominantly been reported in Medicare enrollees. To the authors' knowledge, there has been no prior direct comparison of utilization rates between Medicare and commercially insured patients. Purpose To analyze trends in NDI utilization ...

journal_title：Radiology

authors： Hong AS,Levin D,Parker L,Rao VM,Ross-Degnan D,Wharam JF

更新日期：2020-02-01 00:00:00

abstract：:Recent methods of magnetic resonance imaging involve the placement of a grid of planes of saturation over the imaging plane; distortion of the grid corresponds to tissue displacement in two dimensions. An extension to this method that allows measurement of motion in the third dimension involves a second acquisition th...

journal_title：Radiology

authors： Pipe JG,Boes JL,Chenevert TL

更新日期：1991-11-01 00:00:00

abstract：:The authors describe a simplified method of venography of the lower extremity which gives improved visualization of the proximal deep venous system. The technique involves high volumes of contrast material, no tourniquets, a relatively vertical, non-weight-bearing position, and passive elevation of the legs. ...

journal_title：Radiology

authors： Rampton JB,Armstrong JD Jr

更新日期：1977-06-01 00:00:00

abstract：PURPOSE:To retrospectively assess endoleak shapes and locations within aneurysms to differentiate type II from type I and type III endoleaks. MATERIALS AND METHODS:The institutional review board granted an exemption for this HIPAA-compliant study; patient informed consent was not required. A retrospective review of ar...

journal_title：Radiology

authors： Chernyak V,Rozenblit AM,Patlas M,Cynamon J,Ricci ZJ,Laks MP,Veith FJ

更新日期：2006-09-01 00:00:00

abstract：PURPOSE:To identify computed tomographic (CT) findings that are associated with the effectiveness of nonsurgical treatment in patients with adhesive small-bowel obstruction ( SBO small-bowel obstruction ) that was initially treated medically. MATERIALS AND METHODS:The local institutional review board approved this ret...

journal_title：Radiology

authors： Millet I,Ruyer A,Alili C,Curros Doyon F,Molinari N,Pages E,Zins M,Taourel P

更新日期：2014-11-01 00:00:00

abstract：:Seventeen children with acute renal failure due to the hemolytic-uremic syndrome were examined with duplex Doppler ultrasound. Serial measurements of intrarenal arterial pulsatility were obtained by means of the Pourcelot index. These were compared with daily urine volume, both during the phase of renal failure (durin...

journal_title：Radiology

authors： Patriquin HB,O'Regan S,Robitaille P,Paltiel H

更新日期：1989-09-01 00:00:00

abstract：:Magnetic resonance (MR) gated cardiac imaging was performed in ten subjects using a prototype 0.15-T resistive magnet imaging system. Volume and planar imaging techniques utilizing saturation recovery, proton Tl-weighted relaxation time pulse sequences produced images of the heart and great vessels with exquisite anat...

journal_title：Radiology

authors： Go RT,MacIntyre WJ,Yeung HN,Kramer DM,Geisinger M,Chilcote W,George C,O'Donnell JK,Moodie DS,Meaney TF

更新日期：1984-01-01 00:00:00

abstract：PURPOSE:To compare the long-term therapeutic outcomes of radiofrequency (RF) ablation for small perivascular hepatocellular carcinoma (HCC) and nonperivascular HCC. MATERIALS AND METHODS:This retrospective study was approved by the institutional review board. Between December 2004 and April 2008, 241 patients (175 men...

journal_title：Radiology

authors： Kang TW,Lim HK,Lee MW,Kim YS,Choi D,Rhim H

更新日期：2014-03-01 00:00:00

abstract：PURPOSE:To examine trabecular microarchitecture with high-resolution flat-panel volume computed tomography (CT) and bone mineral density (BMD) with dual-energy x-ray absorptiometry (DXA) in adolescent girls with anorexia nervosa (AN) and to compare these results with those in normal-weight control subjects. MATERIALS ...

journal_title：Radiology

authors： Bredella MA,Misra M,Miller KK,Madisch I,Sarwar A,Cheung A,Klibanski A,Gupta R

更新日期：2008-12-01 00:00:00

abstract：:Biliary calculi of a non-Western pattern were detected in 15 patients on real-time sonography performed over a 3-year period in a center serving a predominantly "Cape colored" (mixed race) population in South Africa. In two patients definite calculi were detected only in the common bile duct or gallbladder, but there ...

journal_title：Radiology

authors： Schulman A

更新日期：1987-02-01 00:00:00

abstract：:A clinical comparison study of scanning equalization radiography (SER) and conventional chest radiography was performed with the latest prototype SER system. Conventional chest radiography was performed at 120 kVp with Lanex regular screens (Eastman Kodak, Rochester, NY) and Kodak Ortho-G or Ortho-C film (Eastman Koda...

journal_title：Radiology

authors： Wandtke JC,Plewes DB

更新日期：1989-09-01 00:00:00

abstract：:The value of computed tomography (CT) in determining the cause of obstructive jaundice in 67 proved cases is described. The presence of stones, the level of obstruction, the relative size of the ringlike structures produced by the dilated bile duct, and the shape of the distal visualized ring have proved to be the mos...

journal_title：Radiology

authors： Pedrosa CS,Casanova R,Lezana AH,Fernandez MC

更新日期：1981-06-01 00:00:00