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3001. Coregistered MR imaging myocardial viability maps and multi-detector row CT coronary angiography displays for surgical revascularization planning: initial experience. (Abstract)

disease (CAD) and regional effect of CAD on LV myocardium in patients with chronic ischemic heart disease (CIHD); and to determine the utility of coregistered displays in optimizing surgical revascularization planning.This study was HIPAA compliant and was approved by the local Institutional Review Board, with waiver of informed consent. Twenty-six patients (19 men, seven women; age, 56 years +/- 12 [+/- standard deviation]) with CIHD underwent MR imaging assessment of myocardial viability and multi

2005 Radiology

3002. Accuracy of liver fat quantification at MR imaging: comparison of out-of-phase gradient-echo and fat-saturated fast spin-echo techniques--initial experience. (Abstract)

consent was not required. Data collection ended before HIPAA regulations were implemented, but patient anonymity was maintained. Twenty-seven patients, 16 with cirrhosis, were retrospectively identified who underwent MR imaging before histopathologic evaluation of liver fat at biopsy or surgery. The patient population consisted of 15 male and 12 female patients (mean age, 55 years; range, 16-75 years). One radiologist blinded to the histopathologic results recorded mean signal intensity derived from

2005 Radiology

3003. Testicular microlithiasis in association with pseudoxanthoma elasticum. (Abstract)

Testicular microlithiasis in association with pseudoxanthoma elasticum. To determine the presence of testicular microlithiasis in male subjects with pseudoxanthoma elasticum (PXE).Institutional review board approval was obtained for the prospective and retrospective components of this HIPAA-compliant study. Informed consent was obtained from all patients or their parents. Testicular ultrasonography (US) was performed in eight men aged 29-56 years and in one 13-year-old boy, all with confirmed

2005 Radiology

3004. Orthopedic hardware complications diagnosed with multi-detector row CT. (Abstract)

Orthopedic hardware complications diagnosed with multi-detector row CT. To retrospectively evaluate multi-detector row computed tomography (CT) for the depiction of orthopedic hardware complications in the spine and appendicular skeleton.This HIPAA-compliant study had institutional review board approval; patient informed consent was not required. Results of 114 multi-detector row CT studies performed because of possible hardware complications in 109 patients (57 men, 52 women; mean age, 44

2005 Radiology

3005. Benign and malignant processes: normal values and differentiation with chemical shift MR imaging in vertebral marrow. (Abstract)

Benign and malignant processes: normal values and differentiation with chemical shift MR imaging in vertebral marrow. To establish retrospectively a range of values for signal intensity change in normal vertebral marrow by using chemical shift magnetic resonance (MR) imaging and to assess the use of this technique in differentiating benign from malignant marrow abnormalities.Institutional Review Board approval for this retrospective, HIPAA-compliant study was obtained; informed consent

2005 Radiology

3006. Comparison of alignment of computer-registered data sets: combined PET/CT versus independent PET and CT of the thorax. (Abstract)

Comparison of alignment of computer-registered data sets: combined PET/CT versus independent PET and CT of the thorax. To retrospectively determine whether alignment of registered positron emission tomographic (PET) and computed tomographic (CT) data sets obtained independently varies significantly from alignment of data sets acquired from a combined PET/CT scanner.The study was approved by the institution's Human Research Committee with a waiver of informed consent and complied with HIPAA

2005 Radiology

3007. CT appearance of bone metastases detected with FDG PET as part of the same PET/CT examination. (Abstract)

CT appearance of bone metastases detected with FDG PET as part of the same PET/CT examination. To retrospectively evaluate lesion findings at computed tomography (CT) performed as part of a combined positron emission tomography (PET)/CT examination in patients suspected of having metastatic bone lesions-lesions that were detected with fluorine 18 fluorodeoxyglucose (FDG) PET as part of the same examination-and to correlate the CT and FDG PET findings.This HIPAA-compliant study had institutional

2005 Radiology

3008. Small-bowel perfusion measurement: feasibility with single-compartment kinetic model applied to dynamic contrast-enhanced CT. (Abstract)

Small-bowel perfusion measurement: feasibility with single-compartment kinetic model applied to dynamic contrast-enhanced CT. This study was institutional review board approved and HIPAA compliant. Informed consent was obtained from all patients. The purpose of the study was to prospectively examine the feasibility of measuring small-bowel quantitative blood flow by using motion-corrected, contrast-enhanced computed tomographic (CT) images and a single-compartment kinetic model. Seven patients

2005 Radiology

3009. Fetal posterior fossa volume: assessment with MR imaging. (Abstract)

Fetal posterior fossa volume: assessment with MR imaging. To retrospectively determine the relationship between posterior fossa volume (PFV) and estimated gestational age (EGA) and/or femur length (FL) during pregnancy for the purpose of developing a normal growth curve.Advance institutional review board approval was obtained for this HIPAA-compliant study, and the need for parent informed consent was waived. A cross-sectional retrospective study was performed to measure PFV on in vivo magnetic

2006 Radiology

3010. Artificial multiple sclerosis lesions on simulated FLAIR brain MR images: echo time and observer performance in detection. (Abstract)

Artificial multiple sclerosis lesions on simulated FLAIR brain MR images: echo time and observer performance in detection. The institutional review board approved the described HIPAA-compliant study, which was performed to prospectively evaluate observer performance in the detection of artificial multiple sclerosis (MS) lesions that were randomly distributed supra- and infratentorially on simulated fluid-attenuated inversion-recovery (FLAIR) magnetic resonance (MR) images obtained at different

2006 Radiology

3011. Sclerosis of the pterygoid process in untreated patients with nasopharyngeal carcinoma. (Abstract)

Sclerosis of the pterygoid process in untreated patients with nasopharyngeal carcinoma. To retrospectively evaluate the prevalence of pterygoid process sclerosis in patients with untreated nasopharyngeal carcinoma.This retrospective HIPAA-compliant study was performed after the institutional review board deemed it to be exempt from review and patient informed consent. Contrast material-enhanced computed tomographic (CT) scans of the neck obtained in 31 patients (22 men, nine women; mean age, 42

2006 Radiology

3012. Comparison of manual and automatic section positioning of brain MR images. (Abstract)

Comparison of manual and automatic section positioning of brain MR images. The study protocol was approved by the institutional review board and was in full compliance with HIPAA guidelines. Informed consent was obtained from all patients. The purpose of this study was to prospectively compare intra- and intersubject variability of manual versus automatic magnetic resonance (MR) imaging section prescription. In two examinations, T2-weighted series were acquired with both methods. All

2006 Radiology

3013. Shoulder impingement: objective 3D shape analysis of acromial morphologic features. (Abstract)

Shoulder impingement: objective 3D shape analysis of acromial morphologic features. To retrospectively and quantitatively analyze the acromial undersurface in three dimensions and to determine its association with impingement syndrome and rotator cuff tears.Institutional review board approval was received with exemption of informed consent for this retrospective HIPAA-compliant study. Magnetic resonance images were evaluated in 84 patients (63 males, 21 females; mean age, 42.6 years; age range

2006 Radiology

3014. Causes of errors in polyp detection at air-contrast barium enema examination. (Abstract)

Causes of errors in polyp detection at air-contrast barium enema examination. To retrospectively determine the cause of errors in air-contrast barium enema (ACBE) examination for detection of polyps 6 mm or larger.The study had institutional review board approval. Informed consent was waived for this HIPAA-compliant study. ABCE findings in 41 subjects with 56 missed polyps were evaluated by two radiologists to determine if the cause of errors was perceptual or technical. A comparison was made

2006 Radiology

3015. Breast microcalcifications: retrieval failure at prone stereotactic core and vacuum breast biopsy--frequency, causes, and outcome. Full Text available with Trip Pro

Breast microcalcifications: retrieval failure at prone stereotactic core and vacuum breast biopsy--frequency, causes, and outcome. To retrospectively determine the frequency and causes of failure to retrieve microcalcifications in nonpalpable lesions, as judged on a radiograph of the specimen, and to determine outcome in patients with those lesions.Informed consent was obtained from each patient prior to biopsy. The institutional review board approved this HIPAA-compliant study and granted

2006 Radiology

3016. Odontogenic orbital inflammation: clinical and CT findings--initial observations. (Abstract)

Odontogenic orbital inflammation: clinical and CT findings--initial observations. To retrospectively review computed tomographic (CT) and clinical findings in patients with odontogenic orbital infection.Approval from the institutional review board was obtained for chart and scan review, and informed consent was waived for this HIPAA-compliant study. Five patients, two male and three female (median age, 37 years; age range, 13-55 years), who had odontogenic orbital cellulitis underwent clinical

2006 Radiology

3017. Tagging-based, electronically cleansed CT colonography: evaluation of patient comfort and image readability. (Abstract)

among the noncathartic and cathartic cohorts were compared with nonparametric analysis of variance, the Fisher exact test, and the F test, as appropriate. The study was HIPAA compliant.Study subjects who received tagging preparations reported significantly improved discomfort scores when compared with those of the control subjects (P < .05, each comparison). There was no significant difference in discomfort scores among groups 1, 2, and 3. For each reader, scores of subtracted image readability were

2006 Radiology

3018. Parkinson disease: pattern of functional MR imaging activation during deep brain stimulation of subthalamic nucleus--initial experience. (Abstract)

in the study, and the study protocol was approved by the institutional review board at the Cleveland Clinic Foundation and was HIPAA compliant. After extensive phantom safety testing of DBS lead systems, five patients (three men, two women; mean age, 49.4 years +/- 14.5 [standard deviation]; range, 31-74 years) with percutaneously extended bilateral DBS electrodes placed in the STN for treatment of Parkinson disease were examined at 3 T on the 1st or 2nd postoperative day. Imaging consisted of a three

2006 Radiology

3019. Screening mammograms: interpretation with computer-aided detection--prospective evaluation. (Abstract)

Screening mammograms: interpretation with computer-aided detection--prospective evaluation. To prospectively determine the effect of a commercially available computer-aided detection (CAD) system on interpretations of screening mammograms.Institutional review board approval was granted; informed consent and HIPAA compliance were waived. A total of 21 349 screening mammograms obtained in 18 096 women were interpreted first without and then with review of CAD images to determine the effect of CAD

2006 Radiology

3020. BI-RADS lexicon for US and mammography: interobserver variability and positive predictive value. Full Text available with Trip Pro

consent was not required. This study was HIPAA compliant. Ninety-four consecutive lesions in 91 women who underwent image-guided biopsy comprised 59 masses, 32 calcifications, and three masses with calcification. Five radiologists retrospectively reviewed these lesions. Each observer described each lesion with BI-RADS terminology and assigned a final BI-RADS category. Interobserver variability was assessed with the Cohen kappa statistic. A pathologic diagnosis was available for all 94 lesions; 30 (32

2006 Radiology

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