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3221. Patient-specific time to peak abdominal organ enhancement varies with time to peak aortic enhancement at MR imaging. (PubMed)

Patient-specific time to peak abdominal organ enhancement varies with time to peak aortic enhancement at MR imaging. To retrospectively evaluate the relationship between the times to peak enhancement of the liver, pancreas, and jejunum with respect to the time to peak aortic enhancement at magnetic resonance (MR) imaging.The committee on human research approved this study and waived written informed consent. This study was HIPAA compliant. The study retrospectively identified 141 patients (63

2007 Radiology

3222. Enhanced infarct border zone function and altered mechanical activation predict inducibility of monomorphic ventricular tachycardia in patients with ischemic cardiomyopathy. (PubMed)

) in patients with ischemic cardiomyopathy.This HIPAA-compliant study was institutional review board approved; written informed consent was obtained from all patients. Forty-six patients (36 men, 10 women; mean age +/- standard deviation, 61.6 years +/- 11.9) with prior myocardial infarction (MI) and left ventricular dysfunction were referred for defibrillator implantation and underwent an electrophysiologic examination and tagged contrast-enhanced magnetic resonance (MR) imaging. Peak circumferential

2007 Radiology

3223. Breast lymphoma: imaging findings of 32 tumors in 27 patients. (PubMed)

Breast lymphoma: imaging findings of 32 tumors in 27 patients. To retrospectively evaluate the imaging findings of breast lymphomas in patients who had undergone mammography, ultrasonography (US), magnetic resonance (MR) imaging, or combined positron emission tomography (PET)/computed tomography (CT) scanning.The institutional review board approved this HIPAA-compliant study and waived informed consent. Twenty-seven women who had been diagnosed with breast lymphoma (32 tumors) and had undergone

2007 Radiology

3224. Breast MR imaging: computer-aided evaluation program for discriminating benign from malignant lesions. (PubMed)

Breast MR imaging: computer-aided evaluation program for discriminating benign from malignant lesions. To retrospectively determine the sensitivity of kinetic features measured with computer-aided evaluation at breast magnetic resonance (MR) imaging in discriminating benign from malignant lesions, with histopathologic findings used as the reference standard.Institutional review board approval was obtained for this HIPAA-compliant study. Informed consent was waived. Suspicious breast lesions

2007 Radiology

3225. Evidence-based target recall rates for screening mammography. (PubMed)

of the IRBs were followed. The study was HIPAA compliant. Recall rate was defined as the percentage of screening studies for which further work-up was recommended by the radiologist. Sensitivity was defined as the proportion of cancers that were detected at screening mammography. Piecewise linear regression was used to model sensitivity as a function of recall rate. This model allows detection of critical recall rates in which significant changes (shifts) occurred in the rates that sensitivity increased

2007 Radiology

3226. Detection of pulmonary vein and left atrial scar after catheter ablation with three-dimensional navigator-gated delayed enhancement MR imaging: initial experience. (PubMed)

written informed consent; the study was approved by the local institutional review board and was HIPAA compliant. A high-spatial-resolution free-breathing delayed enhancement MR imaging method was developed to detect scar (ie, ablated tissue) in the LA and pulmonary veins (PVs). The LA in 15 patients before ablation and in 18 patients at least 30 days after ablation was examined. A reader with 4 years of experience assessed presence of delayed enhancement on images and circumferential completeness

2007 Radiology

3227. Advanced hepatocellular carcinoma: CT perfusion of liver and tumor tissue--initial experience. (PubMed)

Advanced hepatocellular carcinoma: CT perfusion of liver and tumor tissue--initial experience. To prospectively assess computed tomographic (CT) perfusion for evaluation of tumor vascularity of advanced hepatocellular carcinoma (HCC) and to correlate CT perfusion parameters with tumor grade and serum markers.The study was HIPAA compliant and was approved by the institutional review board. Patients provided informed consent. Thirty patients (22 men, eight women; mean age, 60 years; range, 28-79

2007 Radiology

3228. Complications of diagnostic cerebral angiography: evaluation of 19,826 consecutive patients. (PubMed)

Complications of diagnostic cerebral angiography: evaluation of 19,826 consecutive patients. To retrospectively evaluate the complications of diagnostic cerebral catheter angiography in 19,826 consecutive patients.This HIPAA-compliant study had institutional review board approval, with waiver of informed consent. Demographic, procedural, and complication data in 19 826 consecutive patients undergoing diagnostic cerebral angiography at one institution from 1981 through 2003 were retrospectively

2007 Radiology

3229. Multidetector CT of the paranasal sinus: potential for radiation dose reduction. (PubMed)

Multidetector CT of the paranasal sinus: potential for radiation dose reduction. The aim of the study was to retrospectively determine the potential for radiation dose reduction at multidetector computed tomography (CT) of the paranasal sinus by using computer simulation of the effect of low-radiation dose acquisition on diagnostic image quality. This HIPAA compliant study was approved by the institutional human research committee. The need for informed patient consent was waived. Twenty

2007 Radiology

3230. Virtual autopsy: two- and three-dimensional multidetector CT findings in drowning with autopsy comparison. (PubMed)

Virtual autopsy: two- and three-dimensional multidetector CT findings in drowning with autopsy comparison. To retrospectively determine the multidetector computed tomographic (CT) virtual autopsy findings of death by drowning in comparison with autopsy findings.The institutional review board of the Armed Forces Institute of Pathology approved this HIPAA-compliant study and did not require informed consent by the next of kin. Total-body multidetector CT was performed, immediately prior

2007 Radiology

3231. Percutaneous radiofrequency ablation of hepatic tumors against the diaphragm: frequency of diaphragmatic injury. (PubMed)

Percutaneous radiofrequency ablation of hepatic tumors against the diaphragm: frequency of diaphragmatic injury. To retrospectively determine the frequency of diaphragmatic injury when percutaneous hepatic radiofrequency (RF) ablation is performed adjacent to the diaphragm.Institutional Review Board approval was obtained for our HIPAA-compliant study. Informed consent for the ablation procedure and for use of related data for future research was obtained from each patient. A retrospective

2007 Radiology

3232. Breast mass lesions: computer-aided diagnosis models with mammographic and sonographic descriptors. (PubMed)

Breast mass lesions: computer-aided diagnosis models with mammographic and sonographic descriptors. To retrospectively develop and evaluate computer-aided diagnosis (CAD) models that include both mammographic and sonographic descriptors.Institutional review board approval was obtained for this HIPAA-compliant study. A waiver of informed consent was obtained. Mammographic and sonographic examinations were performed in 737 patients (age range, 17-87 years), which yielded 803 breast mass lesions

2007 Radiology

3233. Solitary brain lesions enhancing at MR imaging: evaluation with fluorine 18 fluorocholine PET. (PubMed)

consent in this institutional review board-approved, HIPAA-compliant study. Histopathologic diagnoses were made in 24 cases (13 high-grade gliomas, eight metastases to the brain, and three benign lesions). In six cases, benign lesions were diagnosed on the basis of longitudinal follow-up MR findings. The maximum standardized uptake value (SUV(max)) for lesion and peritumoral regions was measured on PET images, and a lesion-to-normal tissue uptake ratio (LNR) was calculated. Differences were assessed

2007 Radiology

3234. Acute brain infarct: detection and delineation with CT angiographic source images versus nonenhanced CT scans. (PubMed)

images as reference.Informed consent and institutional review board approval were received for this HIPAA-compliant study. Nonenhanced scans and angiographic source images obtained within 12 hours of symptom onset in 51 patients suspected of having MCA stroke were reviewed. Two blinded neuroimagers rated presence and extent of hypoattenuation on nonenhanced scans and angiographic source images with Alberta Stroke Programme Early CT Score (ASPECTS). Level of certainty for hypoattenuation detection

2007 Radiology

3235. Significant coronary artery stenosis: comparison on per-patient and per-vessel or per-segment basis at 64-section CT angiography. (PubMed)

Significant coronary artery stenosis: comparison on per-patient and per-vessel or per-segment basis at 64-section CT angiography. To prospectively evaluate the accuracy of 64-section computed tomographic (CT) coronary angiography for assessing significant stenosis on a global and segmental level, by using conventional coronary artery angiography as the reference standard.This study was HIPAA compliant and had local institutional review board approval. Patients gave informed consent. Patients

2007 Radiology

3236. CT colonography: false-negative interpretations. (PubMed)

CT colonography: false-negative interpretations. To retrospectively evaluate if false-negative interpretations at computed tomographic (CT) colonography are due to observer error.This study was HIPAA compliant and had institutional review board approval, with waiver of informed consent. An initial unblinded review of CT colonographic image data was used to generate reconciliation reports for all false-negative polyp candidates 6.0 mm or larger. These findings were then verified by two

2007 Radiology

3237. Acute cholecystitis: MR findings and differentiation from chronic cholecystitis. (PubMed)

Acute cholecystitis: MR findings and differentiation from chronic cholecystitis. To retrospectively determine the sensitivity and specificity of magnetic resonance (MR) imaging for differentiation between acute and chronic cholecystitis, with histopathologic analysis as the reference standard.Institutional review board approval with waived informed consent was obtained for this HIPAA-compliant study. Four reviewers blinded to the cholecystitis type but aware that cholecystitis was present

2007 Radiology

3238. The Health Insurance Portability and Accountability Act Privacy Rule: a practical guide for researchers. (PubMed)

The Health Insurance Portability and Accountability Act Privacy Rule: a practical guide for researchers. The Health Insurance Portability and Accountability Act (HIPAA) Privacy Rule, intended to address potential threats to patient privacy posed by the computerization and standardization of medical records, provides a new floor level of federal protection for health information in all 50 states. In most cases, compliance with the Privacy Rule was required as of April 2003. Yet considerable

2004 Medical Care

3239. AOFAS member experience with computerization of the office. (PubMed)

AOFAS member experience with computerization of the office. The combination of the implementation of the Healthcare Information Portability and Accountability Act (HIPAA) and the widespread publicity surrounding the report by the Institute of Medicine on preventable medical errors has increased interest of AOFAS members in the use of office-based electronic medical record (EMR) systems. Despite the large number of vendors for office-based EMR systems, little has been written to guide

2005 Foot & Ankle International

3240. The impaired hypothyroid patient: ethical considerations and obligations. (PubMed)

safety. Severely hypothyroid patients may lack the capacity to make an informed decision, even when warned against driving or other tasks, and some may ignore such warnings.The legal and ethical "duty to warn" may trump confidentiality and HIPAA in cases where the activity of impaired patients seriously affects public safety. Not only do health care providers have a clear duty to warn patients not to drive, but in some extreme cases, may have a duty to warn third parties when a patient's driving

2007 Thyroid

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