abstract：RATIONALE AND OBJECTIVES:The purpose of this multicenter, multireader study was to evaluate the performance of computed tomography (CT) lung nodule computer-aided detection (CAD) software as a second reader. METHODS AND MATERIALS:The study involved 109 patients from four sites. The data were collected from a variety o...

journal_title：Academic radiology

authors： White CS,Pugatch R,Koonce T,Rust SW,Dharaiya E

更新日期：2008-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Although inflammatory breast carcinoma (IBC) accounts for 1%-4% of all breast cancer cases, the appearance of this highly malignant tumor in magnetic resonance imaging (MRI) is still not well characterized. The aim of this study was to identify typical imaging features of IBC in comparison with...

journal_title：Academic radiology

authors： Renz DM,Baltzer PA,Böttcher J,Thaher F,Gajda M,Camara O,Runnebaum IB,Kaiser WA

更新日期：2008-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We introduce a new approach to the prediction of final infarct growth in human acute ischemic stroke based on image analysis of the apparent diffusion coefficient (ADC) maps obtained from magnetic resonance imaging. Evidence from multiple previous studies indicate that ADC maps are likely to re...

journal_title：Academic radiology

authors： Montiel NH,Rosso C,Chupin N,Deltour S,Bardinet E,Dormont D,Samson Y,Baillet S

更新日期：2008-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The capability of wavelet transforms to separate signals into frequency bands is the basis for its use in image compression and storage, data management and transmission, and, recently, extraction of latent images of tissue components from noisy medical images. Analysis of temporal variations o...

journal_title：Academic radiology

authors： Gertz SD,Bodmann BG,Vela D,Papadakis M,Aboshady I,Cherukuri P,Alexander S,Kouri DJ,Baid S,Gittens AA,Gladish GW,Conyers JL,Cody DD,Gavish L,Mazraeshahi RM,Wilner WT,Frazier L,Madjid M,Zarrabi A,Lukovenkov S,Ahmed

更新日期：2007-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Needle biopsy is currently the only way to confirm prostate cancer. To increase prostate cancer diagnostic rate, needles are expected to be deployed at suspicious cancer locations. High-contrast magnetic resonance (MR) imaging provides a powerful tool for detecting suspicious cancerous tissues....

journal_title：Academic radiology

authors： Zhan Y,Ou Y,Feldman M,Tomaszeweski J,Davatzikos C,Shen D

更新日期：2007-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Rotator cuff disorders are prevalent and can cause pain and reduced range of motion and strength. Accurate, noninvasive diagnosis of rotator cuff disorders is therefore important. In this work, we study the relationship between several three-dimensional (3D) shape measurements of the supraspina...

journal_title：Academic radiology

authors： Ward AD,Hamarneh G,Ashry R,Schweitzer ME

更新日期：2007-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Our goal was to develop and evaluate software to support a computer assisted mammography feedback program (CAMFP) to be used for continuing medical education (CME). MATERIALS AND METHODS:Thirty-five radiologists from our region signed consent to participate in an institutional review board-app...

journal_title：Academic radiology

authors： Urban N,Longton GM,Crowe AD,Drucker MJ,Lehman CD,Peacock S,Lowe KA,Zeliadt SB,Gaul MA

更新日期：2007-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We surveyed radiology residents to understand which information sources residents use to learn radiology. MATERIALS AND METHODS:A 15-question survey on learning resources was given to radiology residents at one institution. The survey queried residents about their preferences for sources when ...

journal_title：Academic radiology

authors： Kitchin DR,Applegate KE

更新日期：2007-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the sensitivity of high-resolution breast-specific gamma imaging (BSGI) for the detection of ductal carcinoma in situ (DCIS) based on histopathology and to compare the sensitivity of BSGI with mammography and magnetic resonance imaging (MRI) for the detection of DCIS. MATERIALS AND...

journal_title：Academic radiology

authors： Brem RF,Fishman M,Rapelyea JA

更新日期：2007-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To estimate the gain in signal-to-noise ratio (SNR) in first-pass contrast-enhanced (CE) abdominal magnetic resonance angiography (MRA) at 3.0 T compared with 1.5 T. MATERIALS AND METHODS:Three protocols were simulated using six contrast agents: gadopentetate dimeglumine (Magnevist, Berlex, Wa...

journal_title：Academic radiology

authors： Merkle EM,Dale BM,Barboriak DP

更新日期：2007-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the ability of dynamic contrast-enhanced magnetic resonance imaging (MRI) to differentiate several tumor entities of the parotid gland in a prospective clinical trial. MATERIALS AND METHODS:A total of 112 patients with parotid tumors were examined with dynamic contrast-enhanced 1.5...

journal_title：Academic radiology

authors： Alibek S,Zenk J,Bozzato A,Lell M,Grunewald M,Anders K,Rabe C,Iro H,Bautz W,Greess H

更新日期：2007-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Neoadjuvant systemic therapy (NST) is the standard treatment for locally advanced breast cancer and a common option for primary operable disease. It is important to develop standardized imaging techniques that can monitor and quantify response to NST enabling treatment tailored to each individu...

journal_title：Academic radiology

authors： Chou CP,Wu MT,Chang HT,Lo YS,Pan HB,Degani H,Furman-Haran E

更新日期：2007-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Although elevation of the diaphragm can be appreciated on conventional PA and lateral chest radiography, the modality is commonly viewed as inadequate to differentiate diaphragmatic paralysis from eventration. Our objective was to qualitatively and quantitatively measure the utility of chest ra...

journal_title：Academic radiology

authors： Verhey PT,Gosselin MV,Primack SL,Kraemer AC

更新日期：2007-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We propose a novel segmentation-based interpolation method to reduce the metal artifacts caused by surgical aneurysm clips. MATERIALS AND METHODS:Our method consists of five steps: coarse image reconstruction, metallic object segmentation, forward-projection, projection interpolation, and fina...

journal_title：Academic radiology

authors： Yu H,Zeng K,Bharkhada DK,Wang G,Madsen MT,Saba O,Policeni B,Howard MA,Smoker WR

更新日期：2007-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate whether a computer-aided diagnosis (CADx) technique can accurately classify breast calcifications in full-field digital mammograms (FFDMs) as malignant or benign. The computer technique was developed previously on screen-film mammograms (SFMs) in which individual calcifications were...

journal_title：Academic radiology

authors： Rana RS,Jiang Y,Schmidt RA,Nishikawa RM,Liu B

更新日期：2007-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We sought to investigate the value of diffusion-weighted MR imaging in evaluating focal hepatic nodules in an experimental hepatocellular carcinoma (HCC) rat model. MATERIALS AND METHODS:Forty rats with chemically induced primary hepatic nodules ranging pathologically from regenerative nodules...

journal_title：Academic radiology

authors： Xu H,Li X,Xie JX,Yang ZH,Wang B

更新日期：2007-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To document the frequency of normal and anomalous drainage patterns of the pulmonary veins, and to establish normal values for pulmonary vein ostial diameters, and distance to first bifurcation using multidetector computed tomography, as pertinent to ablation procedures for atrial fibrillation....

journal_title：Academic radiology

authors： Cronin P,Kelly AM,Desjardins B,Patel S,Gross BH,Kazerooni EA,Morady F,Oral H,Carlos RC

更新日期：2007-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:3-Bromopyruvate (3-BrPA), an hexokinase II inhibitor, is known to have high necrotic rate in hyperglycolytic liver tumor models without apparent damage to the normal liver parenchyma. The toxicity of intra-arterial delivery of 3-BrPA in various concentrations has not been specifically investiga...

journal_title：Academic radiology

authors： Chang JM,Chung JW,Jae HJ,Eh H,Son KR,Lee KC,Park JH

更新日期：2007-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We sought to identify factors associated with high levels of external research funding in order to provide departments with information that may help them increase their external research funding. MATERIALS AND METHODS:National Institutes of Health (NIH) data on grants were analyzed to identif...

journal_title：Academic radiology

authors： Jonisch AI,Kligerman S,Nagy E,Bhargavan M,Forman HP,Sunshine J

更新日期：2006-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aims of this study were to label the versatile amino acid l-lysine with (99m)Tc using 2,3-dimercapto-succinic acid (DMSA) as a chelator, and to assess its tumor imaging feasibility under in vivo and in vitro conditions, and finally to determine the subcellular biodistribution of this radiop...

journal_title：Academic radiology

authors： Karacalioglu AO,Yang DJ,Azhdarinia A,Mendez R,Oh C,Kohanim S,Chanda M,Greenwell AC,Yu DF,Kim EE

更新日期：2006-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Current approaches to receiver operating characteristic (ROC) analysis use the MRMC (multiple-reader, multiple-case) paradigm in which several readers read each case and their ratings (or scores) are used to construct an estimate of the area under the ROC curve or some other ROC-related paramet...

journal_title：Academic radiology

authors： Clarkson E,Kupinski MA,Barrett HH

更新日期：2006-11-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:HER-2/neu is a valuable prognostic and therapeutic marker in primary breast carcinoma. The objective of this study was to determine the mammographic and patient characteristics (age) that correlate with HER-2/neu overexpression in primary breast carcinoma. MATERIALS AND METHODS:HER-2/neu chara...

journal_title：Academic radiology

authors： Seo BK,Pisano ED,Kuzimak CM,Koomen M,Pavic D,Lee Y,Cole EB,Lee J

更新日期：2006-10-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Four-dimensional (4D) computed tomography (CT) can be used in radiation treatment planning to account for respiratory motion. Current 4D CT techniques have limitations in either spatial or temporal resolution. In addition, most of these techniques rely on auxiliary surrogates to relate the time...

journal_title：Academic radiology

authors： Xu S,Taylor RH,Fichtinger G,Cleary K

更新日期：2006-09-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To evaluate the potential use of gadolinium (Gd)-based contrast media, especially that of Gadovist, a 1-molar Gd medium, in computed tomography (CT) and compare our findings with standard iodinated contrast media. MATERIAL AND METHODS:Using a live rabbit and an acrylic CT body phantom for comp...

journal_title：Academic radiology

authors： Bonvento MJ,Moore WH,Button TM,Weinmann HJ,Yakupov R,Dilmanian FA

更新日期：2006-08-01 00:00:00

abstract：RATIONALE AND OBJECTIVE:We sought to establish medical students' perspectives of a set of curriculum topics for radiology teaching. MATERIALS AND METHODS:A multicenter study was conducted in New Zealand. A modified Delphi method was adopted. Students enrolled in two New Zealand Universities received a questionnaire. E...

journal_title：Academic radiology

authors： Subramaniam RM,Beckley V,Chan M,Chou T,Scally P

更新日期：2006-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:This study presents a method for generating breast masses and microcalcifications in mammography via simulation. This simulation method allows for the creation of large image datasets with particular lesions, which may serve as a useful tool for perception studies measuring imaging system perfo...

journal_title：Academic radiology

authors： Saunders R,Samei E,Baker J,Delong D

更新日期：2006-07-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of the study is to develop a theory-based signal calibration approach to be used for the conversion of signal-time curves to absolute contrast concentration-time curves for first-pass contrast-enhanced quantitative myocardial perfusion studies. MATERIALS AND METHODS:A normalization pro...

journal_title：Academic radiology

authors： Cernicanu A,Axel L

更新日期：2006-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of the study is to evaluate the effectiveness of an Emergency Radiology (ER) Core Curriculum training module and a Digital Imaging and Communications in Medicine (DICOM)-based interactive examination system to prepare first-year (postgraduate year 2 [PGY-2]) radiology residents and asse...

journal_title：Academic radiology

authors： Ganguli S,Pedrosa I,Yam CS,Appignani B,Siewert B,Kressel HY

更新日期：2006-06-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Since the initial description of an intralobar attenuation gradient by Webb et al, it has been suggested that departure from the intralobar attenuation gradient could indicate early lung diseases. However, its significance has not been determined in detail. We aimed to quantify the anteroposter...

journal_title：Academic radiology

authors： Nishino M,Roberts DH,Sitek A,Raptopoulos V,Boiselle PM,Hatabu H

更新日期：2006-05-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of the study is to develop a permutation test to compare receiver operating characteristic (ROC) curves of two diagnostic modalities in a multireader paired design. MATERIALS AND METHODS:A statistical test for comparing two diagnostic modalities is developed based on all possible excha...

journal_title：Academic radiology

authors： Bandos AI,Rockette HE,Gur D

更新日期：2006-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:A statistical based iterative single-photon emission-computed tomography (SPECT) reconstruction algorithm (OSEM) modeling the depth-dependent collimator response in three dimensions has recently been introduced (OSEM3D). The aim of this study was to evaluate the axial shape fidelity of OSEM3D i...

journal_title：Academic radiology

authors： Römer W,Reichel N,Vija HA,Nickel I,Hornegger J,Bautz W,Kuwert T

更新日期：2006-04-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:This project evaluated human observer performance and that of a human visual system model (JNDmetrix) to assess whether the veiling glare of a digital display influences observer performance during soft-copy interpretation of mammographic images for the detection of masses. MATERIALS AND METHO...

journal_title：Academic radiology

authors： Krupinski EA,Lubin J,Roehrig H,Johnson J,Nafziger J

更新日期：2006-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:We studied preparatory strategies for high-resolution human eye in vivo imaging with commercially available magnets and coils. MATERIALS AND METHODS:We imaged normal volunteers on 1.5T systems by Philips, GE, and Siemens, using commercial approximately 9 cm temporomandibular joint receive coil...

journal_title：Academic radiology

authors： Bert RJ,Patz S,Ossiani M,Caruthers SD,Jara H,Krejza J,Freddo T

更新日期：2006-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Electronic learning (e-learning) may provide a means to enhance learning efficacy. However, introduction of e-learning often fails. We describe a strategy of how an e-learning curriculum was successfully implemented. MATERIALS AND METHODS:The curriculum was designed based on published evidence...

journal_title：Academic radiology

authors： Gotthardt M,Siegert MJ,Schlieck A,Schneider S,Kohnert A,Gross MW,Schäfer C,Wagner R,Hörmann S,Behr TM,Engenhart-Cabillic R,Klose KJ,Jungclas H,Glowalla U

更新日期：2006-03-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:Electron beam angiography is a minimally invasive imaging technique. Adequate vascular opacification throughout the study remains a critical issue for image quality. We hypothesized that vascular image opacification and uniformity of vascular enhancement between slices can be improved using mul...

journal_title：Academic radiology

authors： Budoff MJ,Shinbane JS,Child J,Carson S,Chau A,Liu SH,Mao S

更新日期：2006-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The study aim is to evaluate the quality of radiology requisitions for plain film radiographs on intensive care unit (ICU) patients. MATERIALS AND METHODS:Radiology requisitions for 58 patients in ICU units at our children's hospital and the corresponding original orders for the study, written...

journal_title：Academic radiology

authors： Cohen MD,Curtin S,Lee R

更新日期：2006-02-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:This study explores morphological relationships and structural variability of the corpus callosum (CC), fornix (Fo), anterior (AC), and posterior commissures (PC). MATERIALS AND METHODS:These structures are extracted automatically on the midsagittal plane. The CC and Fo are modeled using best-...

journal_title：Academic radiology

authors： Prakash KN,Nowinski WL

更新日期：2006-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of the study is to gauge radiology fellowship directors' experiences with the fellowship application process and perceptions of the National Resident Matching Program Radiology Fellowship Match, as well as compare these perceptions with those of senior residents. METHODS AND MATERIALS:...

journal_title：Academic radiology

authors： Shetty SK,Resnik CS

更新日期：2006-01-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:The aim of this report is to investigate the magnetic field dependence of the signal-to-noise ratio (SNR) for carotid vessel wall magnetic resonance imaging using phased-array (PA) surface coils by comparing images obtained at 1.5 and 3 Tesla (T) and determine the extent to which the improved S...

journal_title：Academic radiology

authors： Anumula S,Song HK,Wright AC,Wehrli FW

更新日期：2005-12-01 00:00:00

abstract：RATIONALE AND OBJECTIVES:To investigate changes in lung microstructure in healthy adult subjects with no smoking history using diffusion-weighted 3He MRI. MATERIALS AND METHODS:Diffusion magnetic resonance imaging using hyperpolarized helium 3 (3He) was applied to healthy volunteers to explore the dependence of lung m...

journal_title：Academic radiology

authors： Fain SB,Altes TA,Panth SR,Evans MD,Waters B,Mugler JP 3rd,Korosec FR,Grist TM,Silverman M,Salerno M,Owers-Bradley J

更新日期：2005-11-01 00:00:00