abstract：RATIONALE AND OBJECTIVES:The aim of this study was to assess similarities and differences between methods of performance comparisons under binary (yes or no) and receiver-operating characteristic (ROC)-type pseudocontinuous (0-100) rating data ascertained during an observer performance study of interpretation of full-f...

journal_title：Academic radiology

authors： Gur D,Bandos AI,Rockette HE,Zuley ML,Hakim CM,Chough DM,Ganott MA,Sumkin JH

更新日期：2010-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To assess the performance of dual-energy computed tomography (DECT) equipped with the new tin filter technology to classify phantom renal lesions as cysts or enhancing masses. MATERIALS AND METHODS:Forty spherical lesion proxies ranging in diameter from 6 to 27 mm were filled with either disti...

journal_title：Academic radiology

authors： Leschka S,Stolzmann P,Baumüller S,Scheffel H,Desbiolles L,Schmid B,Marincek B,Alkadhi H

更新日期：2010-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to determine the sonographic visibility of implanted collagen-based breast biopsy marker clips in the clinic and operating room. MATERIALS AND METHODS:Female patients aged > or =18 years who presented for preoperative surgical evaluation within 4 weeks of ultrasound-g...

journal_title：Academic radiology

authors： Eby PR,Calhoun KE,Kurland BF,Demartini WB,Gutierrez RL,Peacock S,Anderson BO,Byrd DR,Mann GN,Lehman CD

更新日期：2010-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Distinguishing recurrent glial tumor from radiation necrosis can be challenging. The purpose of this pilot study was to preliminarily compare unenhanced arterial spin-labeled (ASL) imaging, dynamic susceptibility contrast-enhanced cerebral blood volume (DSCE-CBV) magnetic resonance imaging, and...

journal_title：Academic radiology

authors： Ozsunar Y,Mullins ME,Kwong K,Hochberg FH,Ament C,Schaefer PW,Gonzalez RG,Lev MH

更新日期：2010-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The long-term prospects for patients with peripheral-arterial-occlusive disease (PAOD) must be considered in the context of coexistent generalized atherosclerosis. We sought to determine the added clinical information of noninvasive magnetic resonance imaging (MRI) for detecting asymptomatic at...

journal_title：Academic radiology

authors： Fenchel M,Scheule AM,Kramer U,Bretschneider C,Klumpp B,Seeger A,Rittig K,Claussen CD,Miller S

更新日期：2010-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To determine the impact of additional coronary calcium scoring on total effective radiation dose and diagnostic accuracy of low-dose computed tomography coronary angiography (CTCA) with prospective electrocardiogram (ECG) triggering. MATERIALS AND METHODS:Sixty-one consecutive patients underwe...

journal_title：Academic radiology

authors： Husmann L,Herzog BA,Burger IA,Buechel RR,Pazhenkottil AP,von Schulthess P,Wyss CA,Gaemperli O,Landmesser U,Kaufmann PA

更新日期：2010-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to evaluate the intratumoral residence time of microbubbles (MBs) targeted to alpha(v)beta(3) integrin expressed in the endothelial cells of mice during the process of tumor angiogenesis. MATERIALS AND METHODS:For the preparation of MBs, decafluorobutane gas was sonic...

journal_title：Academic radiology

authors： Jun HY,Park SH,Kim HS,Yoon KH

更新日期：2010-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To quantify the relationship between dose of contrast administered and contrast kinetics of malignant breast lesions. MATERIALS AND METHODS:A total of 108 patients with 120 malignant lesions were selected for an institutional review board-approved review. Dynamic magnetic resonance protocol: o...

journal_title：Academic radiology

authors： Jansen SA,Fan X,Yang C,Shimauchi A,Karczmar G,Newstead GM

更新日期：2010-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Assess whether staff training in advanced rapport skills and self-hypnotic relaxation techniques reduces noncompletion rates during magnetic resonance imaging (MRI). METHODS AND MATERIALS:All staff of a free-standing MRI facility was invited to 3 hours of preparatory communication lectures. Ha...

journal_title：Academic radiology

authors： Lang EV,Ward C,Laser E

更新日期：2010-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Pulmonary vascular alteration is one of the characteristic features of chronic obstructive pulmonary disease (COPD). Recent studies suggest that vascular alteration is closely related to endothelial dysfunction and may be further influenced by emphysema. However, the relationship between morpho...

journal_title：Academic radiology

authors： Matsuoka S,Washko GR,Dransfield MT,Yamashiro T,San Jose Estepar R,Diaz A,Silverman EK,Patz S,Hatabu H

更新日期：2010-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to develop a computer-aided diagnosis (CAD) system in assessing the sonographic morphologic and texture features of soft-tissue tumors. MATERIALS AND METHODS:The retrospective study involved 114 pathology proven cases including 73 benign and 41 malignant soft-tissue t...

journal_title：Academic radiology

authors： Chen CY,Chiou HJ,Chou SY,Chiou SY,Wang HK,Chou YH,Chiang HK

更新日期：2009-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to assess if graphical user interface screen-capture software applied to a magnetic resonance (MR) hardware console could nonintrusively allow the analysis of discrepancies between expected and experienced MR table time. MATERIALS AND METHODS:Individual MR examination...

journal_title：Academic radiology

authors： Roth CJ,Boll DT,Chea YW,Wall LK,Merkle EM

更新日期：2009-10-01 00:00:00

abstract：:The role of positron emission tomography (PET) during the past decade has evolved rapidly from that of a pure research tool to a methodology of enormous clinical potential. (18)F-fluorodeoxyglucose (FDG)-PET is currently the most widely used probe in the diagnosis, staging, assessment of tumor response to treatment, a...

journal_title：Academic radiology

authors： Zaidi H,Vees H,Wissmeyer M

更新日期：2009-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:In vivo tracking cells using gadolinium-based contrast agents have the important advantage of providing a positive contrast on T1-weighted images, which is less likely to be confused with artifacts because of postoperative local signal voids such as metal, hemorrhage, or air. The aim of this st...

journal_title：Academic radiology

authors： Shen J,Zhong XM,Duan XH,Cheng LN,Hong GB,Bi XB,Liu Y

更新日期：2009-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the effect of automatic tube current modulation on radiation dose and image quality for low tube voltage computed tomography (CT) angiography. MATERIALS AND METHODS:An anthropomorphic phantom was scanned with a 64-section CT scanner using following tube voltages: 140 kVp (Protocol ...

journal_title：Academic radiology

authors： Schindera ST,Nelson RC,Yoshizumi T,Toncheva G,Nguyen G,DeLong DM,Szucs-Farkas Z

更新日期：2009-08-01 00:00:00

abstract：:The purpose of this work is to provide current information on the rapidly evolving subject of nephrogenic systemic fibrosis (NSF), to establish the radiologic approach to the management of high-risk patients for NSF, and to assess the probabilistic risk of NSF compared to contrast induced nephropathy (CIN), as encount...

journal_title：Academic radiology

authors： Altun E,Semelka RC,Cakit C

更新日期：2009-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Diffusion tensor tractography (DTT) for neural fibers of the head-and-neck region at 3T has not been reported. The purpose of this study was to evaluate the feasibility of using DTT for visualizing neural fibers in the head-and-neck region at 3T and to explore the use of this method in patients...

journal_title：Academic radiology

authors： Akter M,Hirai T,Minoda R,Murakami R,Saiki S,Okuaki T,Kitajima M,Fukuoka H,Sasao A,Nishimura S,Yumoto E,Awai K,Yamashita Y

更新日期：2009-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Digital chest imaging has replaced film chest radiographs in many centers, but the International Labour Organization classification system, which is the most widely used system for recognition and classification of dust-related abnormalities, is predicated on film chest radiographs. The purpose...

journal_title：Academic radiology

authors： Franzblau A,Kazerooni EA,Sen A,Goodsitt MM,Lee SY,Rosenman KD,Lockey JE,Meyer CA,Gillespie BW,Petsonk EL,Wang ML

更新日期：2009-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to prospectively investigate the diagnostic value of triple rule-out computed tomography (CT) in patients suspected of having acute pulmonary embolism (PE). MATERIALS AND METHODS:A total of 125 patients with suspicion of PE, of whom 14 patients had the additional clin...

journal_title：Academic radiology

authors： Schertler T,Frauenfelder T,Stolzmann P,Scheffel H,Desbiolles L,Marincek B,Kaplan V,Kucher N,Alkadhi H

更新日期：2009-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We evaluated the effect of gravity on intrahepatic perfusion (IHP) in patients with a port-catheter system (PCS) implanted for hepatic arterial infusion chemotherapy (HAIC). Using fused single photon-emission computed tomographic (SPECT)/computed tomographic (CT) images, we compared IHP after t...

journal_title：Academic radiology

authors： Tamura Y,Ikeda O,Nakasone Y,Shiraishi S,Tomiguchi S,Yamashita Y,Takamori H,Baba H

更新日期：2009-06-01 00:00:00

abstract：:This paper outlines the efforts of the American College of Radiology to understand the public perception of radiologists and to effect change in that perception. Through focus groups, in-depth interviews with Capitol Hill staff members, and national telephone surveys, it was found that the public is unaware of the edu...

journal_title：Academic radiology

authors： Neiman HL

更新日期：2009-05-01 00:00:00

abstract：:This case study chronicles the impact of Hurricane Katrina on the Department of Radiology at the Louisiana State University School of Medicine in New Orleans and the department's subsequent efforts to recover and re-dedicate itself to providing quality patient care and resident education. Hurricane Katrina damaged the...

journal_title：Academic radiology

authors： Duggal A,Letourneau JG,Bok LR

更新日期：2009-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Improvements in imaging technology have led to the increased use of computed tomography (CT). For example, micro-CT and quantitative CT (QCT) are now often used in osteoporosis research, in which micro-CT is able to analyze small bones or bone samples with high spatial resolution. In contrast, ...

journal_title：Academic radiology

authors： Sehmisch S,Dullin C,Zaroban A,Tezval M,Rack T,Schmelz U,Seidlova-Wuttke D,Dunkelberg H,Wuttke W,Marten K,Stuermer KM,Stuermer EK

更新日期：2009-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to investigate the subjective similarity for pairs of images with various abnormal patterns of diffuse interstitial lung disease on thin-section computed tomography by experienced radiologists to explore a basis for selecting similar images to assist radiologists' inte...

journal_title：Academic radiology

authors： Li F,Kumazawa S,Shiraishi J,Li Q,Engelmann R,Caligiuri P,MacMahon H,Doi K

更新日期：2009-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:When pituitary adenoma, craniopharyngioma, and Rathke's cleft cyst grow in the sellar and suprasellar region, it is often difficult to differentiate among these three lesions on magnetic resonance (MR) images. The purpose of this study was to apply an artificial neural network (ANN) for differe...

journal_title：Academic radiology

authors： Kitajima M,Hirai T,Katsuragawa S,Okuda T,Fukuoka H,Sasao A,Akter M,Awai K,Nakayama Y,Ikeda R,Yamashita Y,Yano S,Kuratsu J,Doi K

更新日期：2009-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The impact of varying image acquisition parameters on the precision of measurements using quantitative computed tomography is currently based on studies performed before the advent of helical image acquisition and multidetector-row scanners. The aim of this study was to evaluate helical multide...

journal_title：Academic radiology

authors： Bligh M,Bidaut L,White RA,Murphy WA Jr,Stevens DM,Cody DD

更新日期：2009-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Scanning parameters used in multislice computed tomographic (MSCT) coronary angiography should be adapted to patients' heart rates. The aim of this study was to evaluate the rate of success of a software-assisted scan simulation to determine optimal gantry rotation time prior to MSCT coronary a...

journal_title：Academic radiology

authors： Engelken FJ,Lembcke A,Hamm B,Dewey M

更新日期：2009-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of the present study was to examine the usefulness and record the complications of preoperative lipiodol marking using computed tomographic (CT) fluoroscopy for the intraoperative localization of 107 pulmonary nodules. METHODS:Lipiodol marking was performed under CT fluoroscopic guidan...

journal_title：Academic radiology

authors： Kawanaka K,Nomori H,Mori T,Ikeda K,Ikeda O,Tomiguchi S,Yamashita Y

更新日期：2009-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Although the spiculation levels of breast mass boundaries are a primary sign of malignancy for masses detected on mammography, developing an automated computerized method to detect spiculation levels and quantitatively evaluating the performance of such a method is a difficult task. The objecti...

journal_title：Academic radiology

authors： Jiang L,Song E,Xu X,Ma G,Zheng B

更新日期：2008-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:An atlas-based automated liver segmentation method from three-dimensional computed tomographic (3D CT) images has been developed. The method uses two types of atlases, a probabilistic atlas (PA) and a statistical shape model (SSM). MATERIALS AND METHODS:Voxel-based segmentation with a PA is fi...

journal_title：Academic radiology

authors： Okada T,Shimada R,Hori M,Nakamoto M,Chen YW,Nakamura H,Sato Y

更新日期：2008-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Micro-computed tomography (CT) is a important tool for longitudinal imaging of tumor development. The detection and monitoring of tumors in the liver in live animals using micro-CT is challenging. We evaluated the feasibility of high-resolution micro-CT enhanced with a hepatocyte-selective cont...

journal_title：Academic radiology

authors： Kim HW,Cai QY,Jun HY,Chon KS,Park SH,Byun SJ,Lee MS,Oh JM,Kim HS,Yoon KH

更新日期：2008-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Magnetic resonance (MR) imaging is used to assess brain tumor response to therapies, and a MR quality assurance (QA) program is necessary for multicenter clinical trials employing imaging. This study was performed to determine overall variability of quantitative imaging metrics measured with th...

journal_title：Academic radiology

authors： Mulkern RV,Forbes P,Dewey K,Osganian S,Clark M,Wong S,Ramamurthy U,Kun L,Poussaint TY

更新日期：2008-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:An automated method for identification and segmentation of acute/subacute ischemic stroke, using the inherent bi-fold symmetry in brain images, is presented. An accurate and automated method for localization of acute ischemic stroke could provide physicians with a mechanism for early detection ...

journal_title：Academic radiology

authors： Liu SX,Imielinska C,Laine A,Millar WS,Connolly ES,D'Ambrosio AL

更新日期：2008-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To assess computed tomographic (CT) signs that have been described in published studies for the diagnosis of appendicitis to identify independent findings that predict appendicitis. METHODS AND MATERIALS:A retrospective database search identified 67 patients with a CT scan of the abdomen/pelvi...

journal_title：Academic radiology

authors： Ives EP,Sung S,McCue P,Durrani H,Halpern EJ

更新日期：2008-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We sought to evaluate the diagnostic performance of an artificial neural network (ANN) and binary logistic regression (BLR) in differentiating malignant from benign thyroid nodules on ultrasonography. MATERIALS AND METHODS:Two experienced radiologists, who were unaware of the histopathological...

journal_title：Academic radiology

authors： Lim KJ,Choi CS,Yoon DY,Chang SK,Kim KK,Han H,Kim SS,Lee J,Jeon YH

更新日期：2008-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We sought to evaluate the diagnostic performance of high-resolution magnetic resonance imaging (MRI) and conventional MRI of the knee on a standard-field-strength MRI system compared to arthroscopic findings in patients with suspected meniscal tears. MATERIALS AND METHODS:Forty-two patients (2...

journal_title：Academic radiology

authors： Nemec SF,Marlovits S,Trattnig S,Matzek W,Mayerhoefer ME,Krestan CR

更新日期：2008-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Estimation of regional lung function parameters from hyperpolarized gas magnetic resonance images can be very sensitive to presence of noise. Clustering pixels and averaging over the resulting groups is an effective method for reducing the effects of noise in these images, commonly performed by...

journal_title：Academic radiology

authors： Guyer RA,Hellman MD,Emami K,Kadlecek S,Cadman RV,Yu J,Vadhat V,Ishii M,Woodburn JM,Law M,Rizi RR

更新日期：2008-06-01 00:00:00

abstract：:Computer-aided detection (CADe) and computer-aided diagnosis (CADx) have been important areas of research in the last two decades. Significant progress has been made in the area of breast cancer detection, and CAD techniques are being developed in many other areas. Recent advances in multidetector row computed tomogra...

journal_title：Academic radiology

authors： Chan HP,Hadjiiski L,Zhou C,Sahiner B

更新日期：2008-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:In our earlier studies, we reported an evidence-based computer-assisted decision (CAD) system for location-specific interrogation of mammograms. A content-based image retrieval framework with information theoretic (IT) similarity measures serves as the foundation for this system. Specifically, ...

journal_title：Academic radiology

authors： Tourassi GD,Ike R 3rd,Singh S,Harrawood B

更新日期：2008-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this study was to compare the diagnostic accuracy of 64-slice computed tomographic coronary angiography (CTCA) in groups of patients with low, intermediate, and high risk for coronary artery disease (CAD) events. MATERIALS AND METHODS:The institutional review board approved this stu...

journal_title：Academic radiology

authors： Husmann L,Schepis T,Scheffel H,Gaemperli O,Leschka S,Valenta I,Koepfli P,Desbiolles L,Stolzmann P,Marincek B,Alkadhi H,Kaufmann PA

更新日期：2008-04-01 00:00:00