abstract：RATIONALE AND OBJECTIVES:Great expertise is necessary to mentally compile a series of individual two-dimensional image sections into a three-dimensional (3D) composite view that can aid in differential diagnosis. The purpose of this study was to test 3D volume-rendering techniques for differentiating congenital cystic ...

journal_title：Academic radiology

authors： Hata N,Wada T,Chiba T,Tsutsumi Y,Okada Y,Dohi T

更新日期：2003-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to develop and test new assistive devices to aid in the performance of safe, easy, and accurate microwave thermocoagulation therapy guided by magnetic resonance (MR) imaging. MATERIALS AND METHODS:An open-configuration MR imager with an optical tracking system for...

journal_title：Academic radiology

authors： Morikawa S,Inubushi T,Kurumi Y,Naka S,Sato K,Tani T,Haque HA,Tokuda J,Hata N

更新日期：2003-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors' purpose was to search the inversion time (TI) values that enable the best differentiation of fine structures in gray matter (gray-gray differentiation). MATERIALS AND METHODS:Seven healthy adult volunteers with no history of neurologic disease or head trauma were recruited and gav...

journal_title：Academic radiology

authors： Nakamura H,Yamada K,Kizu O,Ito H,Nishimura T

更新日期：2003-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to (a) measure changes in T2 relaxation rates, signal-to-noise ratio (SNR), and contrast with sequential depletion of proteoglycan in cartilage; (b) determine whether there is a relationship between the T2 relaxation rate and proteoglycan in cartilage; and (c) c...

journal_title：Academic radiology

authors： Regatte RR,Akella SV,Borthakur A,Kneeland JB,Reddy R

更新日期：2002-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Several methods have been proposed for estimating the standard error (SE) of the area under the curve (AUC) in receiver operating characteristic analysis. The authors examined the validity of three methods--the LABROC procedure, exponential approximation, and the method of DeLong et al (purely ...

journal_title：Academic radiology

authors： Hajian-Tilaki KO,Hanley JA

更新日期：2002-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The segmentation of airways from CT images is a critical first step for numerous virtual bronchoscopic (VB) applications. Automatic or semiautomatic methods are necessary, since manual segmentation is prohibitively time consuming. The methods must be robust and operate within a reasonable time ...

journal_title：Academic radiology

authors： Kiraly AP,Higgins WE,McLennan G,Hoffman EA,Reinhardt JM

更新日期：2002-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to determine the feasibility of using quantitative 2-[fluorine-18]fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) to monitor the response of breast cancer bone metastases to therapy. MATERIALS AND METHODS:Twenty-four women with stage IV bone-d...

journal_title：Academic radiology

authors： Stafford SE,Gralow JR,Schubert EK,Rinn KJ,Dunnwald LK,Livingston RB,Mankoff DA

更新日期：2002-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to evaluate the American College of Radiology (ACR) accreditation phantom for assessing image quality in digital mammography. MATERIALS AND METHODS:Digital images were obtained of an ACR accreditation phantom at varying mAs (constant kVp) and varying kVp (constant...

journal_title：Academic radiology

authors： Huda W,Sajewicz AM,Ogden KM,Scalzetti EM,Dance DR

更新日期：2002-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:This study was performed to evaluate the feasibility of using a joystick-controlled robotic needle driver to place a 22-gauge needle for nerve and facet blocks. MATERIALS AND METHODS:Biplane fluoroscopy and a robotic needle driver were used to place 12 needles into the lumbar paraspinal region...

journal_title：Academic radiology

authors： Cleary K,Stoianovici D,Patriciu A,Mazilu D,Lindisch D,Watson V

更新日期：2002-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to determine the electronic requirements for supporting evidence-based radiology in today's medical environment. MATERIALS AND METHODS:A software engineering technique, use case modeling, was performed for several clinical settings to determine the use of imaging ...

journal_title：Academic radiology

authors： Bui AA,Taira RK,Dionisio JD,Aberle DR,El-Saden S,Kangarloo H

更新日期：2002-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:No single method is generally accepted for evaluating the accuracy of breast biopsy techniques before their clinical implementation. The purpose of this study was to test a new process for evaluating biopsy techniques by using it in the evaluation of a prototype three-dimensional ultrasound (US...

journal_title：Academic radiology

authors： Smith WL,Surry KJ,Kumar A,McCurdy L,Downey DB,Fenster A

更新日期：2002-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to evaluate whether digitally photographed, computer-annotated MR images produced by clinical radiologists and printed with an inexpensive photo printer are suitable for publication. MATERIALS AND METHODS:Laser prints of 20 magnetic resonance images of the brai...

journal_title：Academic radiology

authors： Caruso RD,Postel GC,McDonald CS,Aronson BA,Christensen JD

更新日期：2002-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Catheter-directed intraarterial (IA) injections of gadolinium contrast agents may be used during endovascular interventions with magnetic resonance (MR) imaging guidance. Injection protocols require further validation. Using a flow phantom and swine, the authors aimed to (a) measure the optimal...

journal_title：Academic radiology

authors： Omary RA,Henseler KP,Unal O,Smith RJ,Ryu RK,Resnick SA,Saker MB,Chrisman HB,Frayne R,Finn JP,Li D,Grist TM

更新日期：2002-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to assess the work-in-progress prototype of an image-guided, robotic system for accurate and consistent placement of transperineal needles into the prostate with intraoperative image guidance inside the gantry of a computed tomographic (CT) scanner. MATERIALS AND ...

journal_title：Academic radiology

authors： Fichtinger G,DeWeese TL,Patriciu A,Tanacs A,Mazilu D,Anderson JH,Masamune K,Taylor RH,Stoianovici D

更新日期：2002-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to assess the performance of a computer-based classification system that uses gaze locations of observers to define the subspace for machine learning. MATERIALS AND METHODS:Thirty-two dental radiographs were classified by an expert viewer into four categories o...

journal_title：Academic radiology

authors： Carmody DP,McGrath SP,Dunn SM,van der Stelt PF,Schouten E

更新日期：2001-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors hypothesized that electrocardiographic triggering near end systole could minimize motion artifacts in electron-beam computed tomography (CT) of the coronary artery. MATERIALS AND METHODS:The study included 2,660 patients who underwent coronary artery calcium scanning with electron-...

journal_title：Academic radiology

authors： Mao S,Budoff MJ,Bin L,Liu SC

更新日期：2001-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to determine the optimum threshold for performing computed tomographic (CT) angiography with shaded surface display (SSD). MATERIALS AND METHODS:A dedicated phantom was developed with an 8-mm luminal diameter. Each of 19 vessels had stenoses ranging from 0% to ...

journal_title：Academic radiology

authors： Addis KA,Hopper KD,Iyriboz TA,Kasales CJ,Liu Y,Wise SW

更新日期：2001-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to compare magnetic resonance (MR) venography and conventional venography in the diagnosis of deep venous thrombosis (DVT) in the calf after sonography. MATERIALS AND METHODS:Sonography was performed in 595 patients who were suspected of having lower-extremity ...

journal_title：Academic radiology

authors： Sica GT,Pugach ME,Koniaris LS,Goldhaber SZ,Polak JF,Mukerjee A,Tempany CM

更新日期：2001-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors evaluated two Bayesian regression models for receiver operating characteristic (ROC) curve analysis of continuous diagnostic outcome data with covariates. MATERIALS AND METHODS:Full and partial Bayesian regression models were applied to data from two studies (n = 180 and 100, respe...

journal_title：Academic radiology

authors： Omalley AJ,Zou KH,Fielding JR,Tempany CM

更新日期：2001-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Early loss of a sensory modality has been associated with cortical reorganization in both animal models and humans. The purpose of this study was to map visual activation with functional magnetic resonance (MR) imaging and to document possible developmental reorganization in the temporal lobe c...

journal_title：Academic radiology

authors： Shibata DK,Kwok E,Zhong J,Shrier D,Numaguchi Y

更新日期：2001-07-01 00:00:00

abstract：:The National Cancer Institute organized a workshop entitled "Image Archive Management" that was presented on August 28 and 29, 2000, at the Natcher Conference Center on the National Institutes of Health (NIH) campus. The purpose of this workshop was to solicit expert input for the planned development of an archival sy...

journal_title：Academic radiology

authors： Staab E,Clarke LP,Baker H,Sullivan D

更新日期：2001-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Urinary calculi are now commonly detected with helical computed tomography (CT), and it has been proposed that stone composition can be determined from CT attenuation values. However, typical scans are made with a beam collimation of 5 mm or more, resulting in volume averaging and reduction in ...

journal_title：Academic radiology

authors： Williams JC Jr,Saw KC,Monga AG,Chua GT,Lingeman JE,McAteer JA

更新日期：2001-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Most radiographic contrast media are hyperosmotic and able to shrink cells with which they are in contact. The authors studied cell volume control in rabbit proximal renal tubules after incubation with three contrast media: iohexol, ioxaglate, and iodixanol. MATERIALS AND METHODS:Proximal rena...

journal_title：Academic radiology

authors： Galtung HK,Løken M,Sakariassen KS

更新日期：2001-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to evaluate the accuracy of ultrasound (US)-guided fine-needle aspiration (FNA), with radiographic follow-up or surgical excision, in conjunction with on-site cytopathologic support in the management of nonpalpable breast lesions. MATERIALS AND METHODS:The finding...

journal_title：Academic radiology

authors： Buchbinder SS,Gurell DS,Tarlow MM,Salvatore M,Suhrland MJ,Kader K

更新日期：2001-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors performed this study to determine if bronchial wall thickening is present in children with moderate to severe asthma during periods free from clinical bronchoconstriction. MATERIALS AND METHODS:The authors obtained low (radiation) dose thin-section computed tomographic (CT) scans i...

journal_title：Academic radiology

authors： Ketai L,Coutsias C,Williamson S,Coutsias V

更新日期：2001-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to determine the feasibility of using transabdominal ultrasonography (US) to monitor tumor growth and response to therapy in a mouse model of orthotopic bladder carcinoma. MATERIALS AND METHODS:Human bladder carcinoma cell suspensions were injected into the bladde...

journal_title：Academic radiology

authors： Rooks V,Beecken WD,Iordanescu I,Taylor GA

更新日期：2001-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Traditional oral and written examinations can be limited in predicting future clinical performance. Therefore Objective Structured Clinical Examinations (OSCEs) have been introduced in other specialties. The authors assessed their value in radiology. MATERIALS AND METHODS:The study includes 12...

journal_title：Academic radiology

authors： Morag E,Lieberman G,Volkan K,Shaffer K,Novelline R,Lang EV

更新日期：2001-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The Mammography Quality Standards Act requires practices to measure limited aspects of their performance. The authors conducted this study to calculate the differences in measurements of sensitivity and specificity due only to differences in the definitions used in the analysis. This included d...

journal_title：Academic radiology

authors： Rosenberg RD,Yankaskas BC,Hunt WC,Ballard-Barbash R,Urban N,Ernster VL,Kerlikowske K,Geller B,Carney PA,Taplin S

更新日期：2000-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to assess resident scores on the American College of Radiology (ACR) In-Training Examination and on the written American Board of Radiology (ABR) Examination relative to attendance at and timing of the Armed Forces Institute of Pathology (AFIP) Radiologic Pathology...

journal_title：Academic radiology

authors： Wise SW,Mauger DT,Matthews AE,Hartman DS

更新日期：2000-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The quality of the graduates of radiology residency programs is powerfully affected by the quality of the candidates admitted to them, making the evaluation and ranking of residency applicants one of the most important tasks of radiology education. In the applicant evaluation process, evaluator...

journal_title：Academic radiology

authors： Gunderman RB,Jackson VP

更新日期：2000-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:In assessing diagnostic accuracy it is often essential to determine the reader's ability both to detect and to correctly locate multiple abnormalities per patient. The authors developed a new approach for the detection and localization of multiple abnormalities and compared it with other approa...

journal_title：Academic radiology

authors： Obuchowski NA,Lieber ML,Powell KA

更新日期：2000-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to describe a simple bootstrap approach for estimating sensitivity, specificity, and the area under the receiver operating characteristic curve for multisite test outcome data. MATERIALS AND METHODS:The performance of bootstrap estimates was evaluated and compared...

journal_title：Academic radiology

authors： Rutter CM

更新日期：2000-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors compared diagnostic accuracy and callback rates with conventional screen-film mammograms and wavelet-compressed digitized images. MATERIALS AND METHODS:Sixty sets of mammograms (four views per case) were digitized at a spatial resolution of 100 microm. The images were wavelet compr...

journal_title：Academic radiology

authors： Powell KA,Mallasch PG,Obuchowski NA,Kerczewski RJ,Ganobcik SN,Cardenosa G,Chilcote W

更新日期：2000-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:This study was undertaken to clarify the difference in signal pattern on contrast material-enhanced T1-weighted magnetic resonance (MR) magnetization transfer (MT) images between enhancing and nonenhancing lesions in various intracranial diseases and to determine the necessity of nonenhanced MT...

journal_title：Academic radiology

authors： Higano S,Shrier DA,Numaguchi Y,Shibata DK,Kwok E

更新日期：2000-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The authors compared magnetic resonance (MR) image quality obtained from 3- and 1-mm-thick sections in the depiction of the temporomandibular joint (TMJ) and its adjacent structures. MATERIALS AND METHODS:Eight TMJ specimens from four adult cadaver heads were depicted with MR imaging. Both 3- ...

journal_title：Academic radiology

authors： Cavalcanti MG,Lew D,Ishimaru T,Ruprecht A

更新日期：1999-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to examine the effects of placing a metal stent across a bronchial orifice. MATERIALS AND METHODS:Nine pigs were used as test subjects, because the right upper lobe bronchus comes directly off the trachea in these animals. One of three types of metal stents was pl...

journal_title：Academic radiology

authors： Bjarnason H,Cahill B,Kløw NE,Han YM,Urness M,Günther R,Gomes MR,Rosenberg MS,Dietz CA Jr,Hunter DW

更新日期：1999-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to investigate the importance of view box luminance and viewing conditions on low-contrast detection by readers. MATERIALS AND METHODS:Radiographs of a mammographic contrast-detail phantom were examined on 632 view box panels. The luminance of these panels was obt...

journal_title：Academic radiology

authors： Rill LN,Huda W,Gkanatsios NA

更新日期：1999-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to determine the percentage of patients with known pelvic fractures who have additional findings of intraabdominal injury, as diagnosed at abdominal computed tomography (CT), and to determine if patients with specific types or patterns of fractures are more likely ...

journal_title：Academic radiology

authors： Killeen KL,DeMeo JH

更新日期：1999-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to evaluate the utility of CO2 versus iodinated contrast medium for wedge hepatic venography in identifying portal vein anatomy during transjugular intrahepatic portosystemic shunt (TIPS) procedures. MATERIALS AND METHODS:Wedge hepatic venograms obtained with CO2 ...

journal_title：Academic radiology

authors： Yang L,Bettmann MA

更新日期：1999-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to test the effectiveness of resident-prepared, independent learning cases in teaching residents chest radiology. MATERIALS AND METHODS:Three 2nd-year residents (one each from the University of Wisconsin, the Oregon Health Sciences University, and the University o...

journal_title：Academic radiology

authors： Collins J,Blankenbaker DG,Albanese MA,Stack SP,Heiserman KK,Primack SL,Kazerooni EA

更新日期：1999-01-01 00:00:00