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2941. Histopathologic and immunohistochemical features of tissue adherent to multitined electrodes after RF ablation of liver malignancies can help predict local tumor progression: initial results. (Abstract)

and immunohistochemical examinations of tissue adherent to electrodes after RF ablation of liver malignancies were performed, with application of proliferation (Ki-67) and apoptosis (caspase-3) markers. Clinical and technical information were prospectively collected for an HIPAA-registered database. Medical records and imaging were reviewed to determine LTP for treated tumors smaller than 5 cm in diameter. LTP-free and survival rates were assessed with Kaplan-Meier method; differences between groups assessed

2008 Radiology

2942. Thirty years' experience with balloon dilation of benign postoperative biliary strictures: long-term outcomes. (Abstract)

Thirty years' experience with balloon dilation of benign postoperative biliary strictures: long-term outcomes. To determine the effectiveness of percutaneous balloon dilation of benign postoperative biliary strictures.We received approval from our institutional review board to undertake this retrospective HIPAA-compliant study, and informed consent was waived. From April 1, 1977, to April 1, 2007, percutaneous biliary balloon dilation (PBBD) was performed in 85 patients with benign biliary

2008 Radiology

2943. Abdominal aorta: evaluation with dual-source dual-energy multidetector CT after endovascular repair of aneurysms--initial observations. (Abstract)

Abdominal aorta: evaluation with dual-source dual-energy multidetector CT after endovascular repair of aneurysms--initial observations. To evaluate the possible radiation dose reduction facilitated by using dual-energy (DE) multidetector computed tomography (CT) after endovascular repair of abdominal aortic aneurysms (AAAs).This prospective study was HIPAA compliant and institutional review board approved. Twenty-two patients who previously had undergone endovascular repair of AAAs underwent 24

2008 Radiology

2944. Feasibility of measurement of pancreatic perfusion parameters with single-compartment kinetic model applied to dynamic contrast-enhanced CT images. (Abstract)

Feasibility of measurement of pancreatic perfusion parameters with single-compartment kinetic model applied to dynamic contrast-enhanced CT images. To examine the feasibility of measuring pancreatic perfusion parameters by using a single-compartment kinetic model applied to contrast material-enhanced computed tomographic (CT) images.This study received institutional review board approval and was HIPAA compliant. Informed consent was waived. Eight subjects (four men, four women; median age, 40

2008 Radiology

2945. Cutaneous caves and subcutaneous adipose columns in the breast: radiologic-pathologic correlation. (Abstract)

Cutaneous caves and subcutaneous adipose columns in the breast: radiologic-pathologic correlation. To investigate the histologic correlations of the innumerable 2-3-mm radiolucencies that project over the breast, as seen on mammograms.With institutional review board approval and HIPAA compliance, this work involved detailed x-ray imaging of discarded tissue from two mastectomy specimens, together with histologic examination of the skin and subcutaneous fat and evaluation of the skin during

2008 Radiology

2946. Suspicious breast lesions: assessment of 3D Doppler US indexes for classification in a test population and fourfold cross-validation scheme. Full Text available with Trip Pro

Suspicious breast lesions: assessment of 3D Doppler US indexes for classification in a test population and fourfold cross-validation scheme. To assess the diagnostic performance of various Doppler ultrasonographic (US) vascularity measures in conjunction with grayscale (GS) criteria in differentiating benign from malignant breast masses, by using histologic findings as the reference standard.Institutional Review Board and HIPAA standards were followed. Seventy-eight women (average age, 49 years

2008 Radiology

2947. Frequency and histopathologic basis of hepatic surface nodularity in patients with fulminant hepatic failure. Full Text available with Trip Pro

Frequency and histopathologic basis of hepatic surface nodularity in patients with fulminant hepatic failure. To determine the frequency and histopathologic basis of hepatic surface nodularity at imaging in patients with fulminant hepatic failure.The committee on human research approved this HIPAA-compliant study and waived written informed consent. Thirty-five consecutive patients [24 female [mean age, 38 years +/- 19 (standard deviation); range, 1-67 years] and 11 male [mean age, 29 years

2008 Radiology

2948. Meniscal measurements of T1rho and T2 at MR imaging in healthy subjects and patients with osteoarthritis. Full Text available with Trip Pro

Meniscal measurements of T1rho and T2 at MR imaging in healthy subjects and patients with osteoarthritis. To prospectively evaluate differences in T1(rho) (T1 relaxation time in the rotating frame) and T2 values in the meniscus at magnetic resonance (MR) imaging in both patients with varying degrees of osteoarthritis (OA) and healthy control subjects.The study was institutional review board approved and HIPAA compliant. Written informed consent was obtained from all subjects. T1(rho) and T2

2008 Radiology

2949. Patients with acute stroke treated with intravenous tPA 3-6 hours after stroke onset: correlations between MR angiography findings and perfusion- and diffusion-weighted imaging in the DEFUSE study. Full Text available with Trip Pro

(with informed consent) were evaluated in a HIPAA-compliant multicenter prospective study approved by all institutional review boards. MR imaging and MR angiography studies were performed before and 3-6 hours after treatment. MR angiography studies that were technically adequate at both time points were evaluated for occlusion, decreased flow, any early recanalization, and degree of recanalization. These results were compared with favorable clinical response (an improvement in National Institutes of Health

2008 Radiology

2950. Screening mammography: does ethnicity influence patient preferences for higher recall rates given the potential for earlier detection of breast cancer? (Abstract)

mammography completed a HIPAA-compliant, Institutional Review Board-approved, validated survey in one of three languages: English, Spanish, or Haitian-Creole. Data were analyzed across three groups (ie, white, black, Hispanic) by using chi(2) analysis.Of 911 women included in the final analysis, 378 (41%) were white, 439 (48%) were black, and 94 (10%) were Hispanic. Income and education levels varied significantly across ethnicities (P < .0001). A higher percentage of white women (40%) correctly

2008 Radiology

2951. Distal radius in adolescent girls with anorexia nervosa: trabecular structure analysis with high-resolution flat-panel volume CT. Full Text available with Trip Pro

with HIPAA guidelines. Informed consent was obtained. Twenty adolescent girls, 10 with mild AN (mean age, 15.9 years; range, 13-18 years) and 10 age- and sex-matched normal-weight control subjects (mean age, 15.9 years; range, 12-18 years) underwent flat-panel volume CT of distal radius to determine apparent trabecular bone volume fraction (BV/TV), apparent trabecular number (TbN), apparent trabecular thickness (TbTh), and apparent trabecular separation (TbSp). All subjects underwent DXA of spine, hip

2008 Radiology

2952. Supraaortic arteries: contrast material dose reduction at 3.0-T high-spatial-resolution MR angiography--feasibility study. (Abstract)

Supraaortic arteries: contrast material dose reduction at 3.0-T high-spatial-resolution MR angiography--feasibility study. To evaluate and compare the diagnostic image quality resulting from three contrast agent dose regimens for 3.0-T high-spatial-resolution three-dimensional magnetic resonance (MR) angiography of the supraaortic arteries.Institutional review board approval was obtained; informed consent was waived for this HIPAA-compliant study. One hundred twenty consecutive patients who

2008 Radiology

2953. Ankle: isotropic MR imaging with 3D-FSE-cube--initial experience in healthy volunteers. Full Text available with Trip Pro

Ankle: isotropic MR imaging with 3D-FSE-cube--initial experience in healthy volunteers. The purpose of this prospective study was to compare a new isotropic three-dimensional (3D) fast spin-echo (FSE) pulse sequence with parallel imaging and extended echo train acquisition (3D-FSE-Cube) with a conventional two-dimensional (2D) FSE sequence for magnetic resonance (MR) imaging of the ankle. After institutional review board approval and informed consent were obtained and in accordance with HIPAA

2008 Radiology

2954. Upper extremity CT angiography in penetrating trauma: use of 64-section multidetector CT. (Abstract)

Upper extremity CT angiography in penetrating trauma: use of 64-section multidetector CT. To determine the feasibility and report clinical outcomes of upper extremity computed tomographic (CT) angiography with 64-section multidetector CT technology in the evaluation of patients sustaining penetrating trauma.This HIPAA-compliant retrospective study was approved by the institutional review board and consent was waived. All adult trauma patients who sustained penetrating trauma to the upper

2008 Radiology

2955. Alzheimer disease: postmortem neuropathologic correlates of antemortem 1H MR spectroscopy metabolite measurements. Full Text available with Trip Pro

Alzheimer disease: postmortem neuropathologic correlates of antemortem 1H MR spectroscopy metabolite measurements. To determine the neuropathologic correlates of antemortem hydrogen 1 ((1)H) magnetic resonance (MR) spectroscopy metabolite measurements in subjects with Alzheimer disease (AD)-type pathology.This study was approved by the institutional review board and was compliant with HIPAA regulations. Informed consent was obtained from each subject. The authors identified 54 subjects who

2008 Radiology

2956. Biochemical and hematologic alterations following percutaneous cryoablation of liver tumors: experience in 48 procedures. (Abstract)

Biochemical and hematologic alterations following percutaneous cryoablation of liver tumors: experience in 48 procedures. To retrospectively determine the frequency and severity of various abnormal laboratory test values following percutaneous cryoablation of liver tumors and to estimate the correlation between laboratory test values and tumor and ablation volumes.This HIPAA-compliant study had institutional review board approval. Informed consent was waived. Biochemical and hematologic

2008 Radiology

2957. Carotid plaque morphology and composition: initial comparison between 1.5- and 3.0-T magnetic field strengths. Full Text available with Trip Pro

-element phased-array surface coils. This HIPAA-compliant study was approved by the institutional review board, and all participants gave written informed consent. Protocols designed for similar signal-to-noise ratios across platforms were implemented to acquire axial T1-weighted, T2-weighted, intermediate-weighted, time-of-flight, and contrast material-enhanced T1-weighted images. Lumen area, wall area, total vessel area, wall thickness, and presence or absence and area of plaque components were

2008 Radiology

2958. Breast US computer-aided diagnosis workstation: performance with a large clinical diagnostic population. Full Text available with Trip Pro

Breast US computer-aided diagnosis workstation: performance with a large clinical diagnostic population. To evaluate the performance of a computer-aided diagnosis (CAD) workstation in classifying cancer in a realistic data set representative of a clinical diagnostic breast ultrasonography (US) practice.The database consisted of consecutive diagnostic breast US scans collected with informed consent with a protocol approved by the institutional review board and compliant with the HIPAA. Images

2008 Radiology

2959. Cortical bone water: in vivo quantification with ultrashort echo-time MR imaging. Full Text available with Trip Pro

Cortical bone water: in vivo quantification with ultrashort echo-time MR imaging. To develop and evaluate a method based on ultrashort echo-time radial magnetic resonance (MR) imaging to quantify bone water (BW) concentration as a new metric of bone quality in human cortical bone in vivo.Human subject studies were institutional review board approved and HIPAA compliant; informed consent was obtained. Cortical BW concentration was determined with custom-designed MR imaging sequences at 3.0 T

2008 Radiology

2960. Risk of nephrogenic systemic fibrosis: evaluation of gadolinium chelate contrast agents at four American universities. (Abstract)

Risk of nephrogenic systemic fibrosis: evaluation of gadolinium chelate contrast agents at four American universities. To retrospectively determine the benchmark incidence of nephrogenic systemic fibrosis (NSF) related to the confirmed use of different gadolinium chelate contrast agents at four U.S. university tertiary care centers.Institutional review board approval was obtained for this HIPAA-compliant multi-institutional study; the requirement for informed patient consent was waived

2008 Radiology

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