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2981. Dobutamine response and myocardial infarct transmurality: functional improvement after coronary artery bypass grafting--initial experience. (PubMed)

Dobutamine response and myocardial infarct transmurality: functional improvement after coronary artery bypass grafting--initial experience. The Investigational Review Board approved the protocol, and all patients provided signed informed consent. The protocol was compliant with HIPAA. The purpose of the study was to prospectively test the hypothesis that addition of low-dose dobutamine and quantification of inotropic reserve in segments with 1%-50% infarct transmurality (IT) would improve

2006 Radiology

2982. Orthopedic spinal and hip prostheses: effects of magnetic susceptibility artifacts during MR arteriography and venography of abdomen and pelvis. (PubMed)

waived the requirement for informed consent and deemed the study to be HIPAA compliant. Forty-two contrast material-enhanced MR angiographic examinations were performed by using a 1.5-T imager in 41 patients (16 men, 25 women; mean age, 57 years; range, 36-79 years); 33 of these examinations included both MR arteriographic and MR venographic components. On the basis of resolution, images for which more than 3 mm of vessels were affected by susceptibility artifacts were considered uninterpretable

2006 Radiology

2983. Right lower quadrant pain: value of the nonvisualized appendix in patients at multidetector CT. (PubMed)

Right lower quadrant pain: value of the nonvisualized appendix in patients at multidetector CT. To retrospectively determine the value of the nonvisualized appendix at multidetector computed tomography (CT) in patients with acute right lower quadrant pain in whom appendicitis was a consideration.Institutional review board approval was obtained for this HIPAA-compliant study, with waiver of informed consent. Records were retrospectively reviewed in patients who presented to the emergency

2006 Radiology

2984. Liver metastases: 3D shape-based analysis of CT scans for detection of local recurrence after radiofrequency ablation. (PubMed)

Liver metastases: 3D shape-based analysis of CT scans for detection of local recurrence after radiofrequency ablation. This HIPAA-compliant pilot study had internal review board approval; informed consent was waived. The purpose was to determine retrospectively the diagnostic performance of a computer-aided three-dimensional (3D) analytic tool for assessing local recurrences of liver metastases by quantifying shape changes in ablated tumors on computed tomographic (CT) scans for follow-up

2006 Radiology

2985. Inflammation in carotid atherosclerotic plaque: a dynamic contrast-enhanced MR imaging study. (PubMed)

Inflammation in carotid atherosclerotic plaque: a dynamic contrast-enhanced MR imaging study. To prospectively evaluate if there is an association between plaque enhancement at magnetic resonance (MR) imaging and proinflammatory cardiovascular risk factors and plaque content.This study was performed with informed consent, HIPAA compliance, and institutional review board approval. Contrast agent dynamics within carotid plaques were measured in 30 patients (29 men, one woman; mean age, 67.7 years

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2006 Radiology

2986. Performance benchmarks for screening mammography. (PubMed)

Performance benchmarks for screening mammography. To retrospectively evaluate the range of performance outcomes of the radiologist in an audit of screening mammography by using a representative sample of U.S. radiologists to allow development of performance benchmarks for screening mammography.Institutional review board approval was obtained, and study was HIPAA compliant. Informed consent was or was not obtained according to institutional review board guidelines. Data from 188 mammographic

2006 Radiology

2987. Screening for colorectal neoplasia with CT colonography: initial experience from the 1st year of coverage by third-party payers. (PubMed)

Screening for colorectal neoplasia with CT colonography: initial experience from the 1st year of coverage by third-party payers. To evaluate our experience in the 1st year of computed tomographic (CT) colonography screening since the initiation of local third-party payer coverage.This HIPAA-compliant study was approved by the institutional review board, and informed consent was waived. Over a 1-year period that ended on April 27, 2005, 1110 consecutive adults (585 women, 525 men; mean age, 58.1

2006 Radiology

2988. Improving the concordance of mammography assessment and management recommendations. (PubMed)

was used to measure change in concordance over time. Each registry and the BCSC Statistical Coordinating Center had a Federal Certificate of Confidentiality and approval from each institution's review board for protection of human subjects to collect and send data to coordinating center and conduct research with these data. Active consent was required at only one site in this HIPAA-compliant study.Concordance increased significantly in the post-MQSA period for Breast Imaging Reporting and Data System

2006 Radiology

2989. Mild cognitive impairment: apparent diffusion coefficient in regional gray matter and white matter structures. (PubMed)

subjects (seven men, six women; mean age, 75 years +/- 4). This study was approved by the institutional review board and was HIPAA compliant. Each subject gave informed consent. ADC was measured from manually drawn regions of interest (ROIs) of the hippocampus, parahippocampal gyrus, amygdala, corpus callosum, and anterior and posterior cingulate gyrus and from automatically defined frontal, parietal, occipital, and temporal lobes by using template masking. ROIs were outlined on anatomic images

2006 Radiology

2990. Detection of simulated multiple sclerosis lesions on T2-weighted and FLAIR images of the brain: observer performance. (PubMed)

Detection of simulated multiple sclerosis lesions on T2-weighted and FLAIR images of the brain: observer performance. To determine observer performance in the detection of multiple sclerosis (MS) lesions on magnetic resonance (MR) images of the brain and to assess the dependence of observer performance on lesion size, parenchymal location, pulse sequence, and supratentorial versus infratentorial level.This HIPAA-compliant protocol was approved by the institutional review board, and previously

2006 Radiology

2991. Prospective evaluation of vascular complications after liver transplantation: comparison of conventional and microbubble contrast-enhanced US. (PubMed)

Prospective evaluation of vascular complications after liver transplantation: comparison of conventional and microbubble contrast-enhanced US. To prospectively compare diagnostic performance of conventional Doppler ultrasonography (US) and microbubble contrast material-enhanced US for assessment of vascular complications after liver transplantation, with clinical follow-up or angiography as reference standard.This study was approved by institutional review board and was HIPAA compliant. Written

2006 Radiology

2992. Tesio catheter access for long-term maintenance hemodialysis. (PubMed)

Tesio catheter access for long-term maintenance hemodialysis. To retrospectively determine the long-term outcome (>6 months) of placement of tunneled hemodialysis catheters.The HIPAA-compliant study protocol was approved by the Committee on Human Research, which waived the requirement for informed consent. The records of patients who underwent hemodialysis with the Tesio system (Medcomp, Harleysville, Pa) at a single outpatient dialysis unit between March 1994 and March 2004 were reviewed

2006 Radiology

2993. Interobserver agreement for Letournel acetabular fracture classification with multidetector CT: are standard Judet radiographs necessary? (PubMed)

for this HIPAA-compliant study, which included 101 imaging studies performed in 99 patients (78 male, 21 female; mean age, 43 years; age range, 15-86 years) with acetabular fractures. Two musculoskeletal radiologists independently classified the fractures with radiography alone and multidetector CT alone. Multiplanar reformatted and three-dimensional (3D) CT images were reviewed at a computer workstation. Readers were shown radiographs at the end of multidetector CT image reading to see if this would change

2006 Radiology

2994. Distribution of stage I lung cancer growth rates determined with serial volumetric CT measurements. (PubMed)

Distribution of stage I lung cancer growth rates determined with serial volumetric CT measurements. To retrospectively determine the distribution of stage I lung cancer growth rates with serial volumetric computed tomographic (CT) measurements.This study was institutional review board approved and HIPAA compliant. The informed consent requirement was waived. Patients (n = 149) with stage I lung cancer who underwent two pretreatment CT examinations 25 or more days apart were identified

2006 Radiology

2995. CT colonography with computer-aided polyp detection: volume and attenuation thresholds to reduce false-positive findings owing to the ileocecal valve. (PubMed)

for the original prospective study. This retrospective study had IRB approval, as well, and was HIPAA-compliant. A total of 496 patients were selected from a larger screening population. CT colonographic images from 394 patients (227 men, 167 women; mean age, 58.0 years; range, 40-79 years) were used as a training set, and images from 102 patients (76 men, 26 women; mean age, 59.8 years; range, 46-79 years) were used as a test set. A series of 2742 volume and attenuation thresholds, for which segmented

2006 Radiology

2996. MR imaging with remote control: feasibility study in cardiovascular disease. (PubMed)

MR imaging with remote control: feasibility study in cardiovascular disease. The institutional review board approved this HIPAA-compliant study and waived informed consent. The purpose was to retrospectively evaluate remote control magnetic resonance (MR) imaging in complex cardiovascular procedures, whereby operational expertise was made available locally from a remote location. Thirty patients underwent cardiac (12 patients) and/or vascular (30 patients) 1.5-T MR imaging with a remote

2006 Radiology

2997. Active Crohn disease: CT findings and interobserver agreement for enteric phase CT enterography. (PubMed)

Active Crohn disease: CT findings and interobserver agreement for enteric phase CT enterography. To retrospectively evaluate small-bowel enhancement characteristics and the sensitivity, specificity, and interobserver agreement of computed tomographic (CT) findings by using histologic and endoscopic results as a reference standard in patients undergoing enteric phase CT enterography.The institutional review board approved this retrospective HIPAA-compliant study, which included patients who

2006 Radiology

2998. Liver fat: effect of hepatic iron deposition on evaluation with opposed-phase MR imaging. (PubMed)

Liver fat: effect of hepatic iron deposition on evaluation with opposed-phase MR imaging. To retrospectively determine the effect of liver iron deposition on the evaluation of liver fat by using opposed-phase magnetic resonance (MR) imaging.Committee on Human Research approval was obtained, and compliance with HIPAA regulations was observed. Patient consent was waived by the committee. Thirty-eight patients with cirrhosis (30 men, eight women; mean age, 58 years; range, 34-76 years) who

2007 Radiology

2999. Five-year lung cancer screening experience: CT appearance, growth rate, location, and histologic features of 61 lung cancers. (PubMed)

approved and HIPAA compliant. Informed consent was waived. CT scans of 61 cancers (24 in men, 37 in women; age range, 53-79 years; mean, 65 years) were retrospectively reviewed for cancer size, morphology, and location. Forty-eight cancers were assessed for morphologic change and volume doubling time (VDT), which was calculated by using a modified Schwartz equation. Histologic sections were retrospectively reviewed.Mean tumor size was 16.4 mm (range, 5.5-52.5 mm). Most common CT morphologic features

2007 Radiology

3000. Evaluation of vascular complications of pancreas transplantation with high-spatial-resolution contrast-enhanced MR angiography. (PubMed)

of an anonymous-subject database. The study was HIPAA compliant. The clinical and MR angiography findings in 11 patients (eight men, three women; mean age, 43 years; age range, 30-54 years) who had a history of pancreatic transplant dysfunction and underwent a total of 13 contrast-enhanced 3D MR angiography examinations were retrospectively reviewed. Comparison with conventional angiography findings was possible for four MR angiography examinations, comparison with surgical findings was possible for two

2007 Radiology

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