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3141. Accuracy of liver fat quantification at MR imaging: comparison of out-of-phase gradient-echo and fat-saturated fast spin-echo techniques--initial experience. (PubMed)

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

3142. Testicular microlithiasis in association with pseudoxanthoma elasticum. (PubMed)

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

3143. Orthopedic hardware complications diagnosed with multi-detector row CT. (PubMed)

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

3144. Benign and malignant processes: normal values and differentiation with chemical shift MR imaging in vertebral marrow. (PubMed)

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

3145. CT appearance of bone metastases detected with FDG PET as part of the same PET/CT examination. (PubMed)

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

3146. Comparison of alignment of computer-registered data sets: combined PET/CT versus independent PET and CT of the thorax. (PubMed)

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

3147. Small-bowel perfusion measurement: feasibility with single-compartment kinetic model applied to dynamic contrast-enhanced CT. (PubMed)

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

3148. Radiofrequency ablation of liver tumors: a new cause of benign portal venous gas. (PubMed)

Radiofrequency ablation of liver tumors: a new cause of benign portal venous gas. To retrospectively describe and categorize the presence of portal venous gas (PVG) from radiofrequency (RF) ablation of hepatic tumors.The study was HIPAA compliant, and informed consent was waived. Thirty-four consecutive computed tomography (CT)-guided percutaneous RF ablations of liver tumors in 26 patients (13 men, 13 women; mean age, 69 years) with five hepatocellular carcinomas and 21 metastatic liver tumors

2005 Radiology

3149. Prostate cancer: three-dimensional sonoelastography for in vitro detection. (PubMed)

Prostate cancer: three-dimensional sonoelastography for in vitro detection. To prospectively evaluate the accuracy of three-dimensional (3D) sonoelastographic imaging, relative to that of gray-scale ultrasonography (US), in the in vitro detection of prostate cancer.The study was approved by the institutional review board and was HIPAA compliant. Informed consent was obtained from all patients. Nineteen prostatectomy specimens from patients aged 46-70 years with biopsy-proved prostate cancer

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2005 Radiology

3150. Osteoarthritis of the knee: comparison of MR imaging findings with radiographic severity measurements and pain in middle-aged women. (PubMed)

Osteoarthritis of the knee: comparison of MR imaging findings with radiographic severity measurements and pain in middle-aged women. To prospectively compare magnetic resonance (MR) imaging-defined abnormalities of osteoarthritis (OA) of the knee with radiographic severity measurements of OA of the knee and self-reported pain.This study was approved by the institutional review board of University of Michigan. Informed consent was obtained for this HIPAA-compliant study. Knee MR imaging

2005 Radiology

3151. Small-bowel obstruction: coronal reformations from isotropic voxels at 16-section multi-detector row CT. (PubMed)

Small-bowel obstruction: coronal reformations from isotropic voxels at 16-section multi-detector row CT. To retrospectively assess the added value of coronal reformations of the abdomen and pelvis from isotropic voxels by using 16-section multi-detector row computed tomography (CT) for the diagnosis of small-bowel obstruction (SBO).This HIPAA-compliant study was approved by the institutional review board of this medical center with a waiver of informed consent. One hundred consecutive patients

2006 Radiology

3152. BI-RADS lexicon for US and mammography: interobserver variability and positive predictive value. (PubMed)

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

3153. Transition zone prostate cancers: features, detection, localization, and staging at endorectal MR imaging. (PubMed)

Transition zone prostate cancers: features, detection, localization, and staging at endorectal MR imaging. To retrospectively evaluate the accuracy of endorectal magnetic resonance (MR) imaging in the detection and local staging of transition zone prostate cancers, with pathologic analysis serving as the reference standard, and to assess MR imaging features of these cancers.The institutional review board approved this HIPAA-compliant retrospective study and waived the informed consent

2006 Radiology

3154. Proton MR spectroscopy with choline peak as malignancy marker improves positive predictive value for breast cancer diagnosis: preliminary study. (PubMed)

Proton MR spectroscopy with choline peak as malignancy marker improves positive predictive value for breast cancer diagnosis: preliminary study. To prospectively evaluate the diagnostic performance of magnetic resonance (MR) spectroscopy in patients with suspicious lesions or biopsy-proved cancers at MR imaging by using histologic findings as the reference standard.After institutional review board approval and informed consent were obtained for this HIPAA-compliant study, breast MR spectroscopy

2006 Radiology

3155. Multiple-image in-room CT imaging guidance for interventional procedures. (PubMed)

Multiple-image in-room CT imaging guidance for interventional procedures. This HIPAA-compliant study was approved by the institutional review board; informed consent was not required. The purpose of this study was to retrospectively compare room use time for interventional procedures performed with multiple-image multi-detector row computed tomographic (CT) fluoroscopy (n=196) and single-image spiral CT fluoroscopy (n=175). There was no statistically significant difference in age, sex

2006 Radiology

3156. Cine delayed-enhancement MR imaging of the heart: initial experience. (PubMed)

Cine delayed-enhancement MR imaging of the heart: initial experience. This study was performed by using an institutional review board-approved protocol, with waived informed consent and HIPAA compliance. The purpose of this study was to preliminarily evaluate a cine delayed-enhancement (DE) pulse sequence for depiction of wall motion and myocardial scar extent during a single acquisition. The technique is based on inversion-recovery single-shot balanced steady-state free precession magnetic

2006 Radiology

3157. Amyotrophic lateral sclerosis: diffusion-tensor and chemical shift MR imaging at 3.0 T. (PubMed)

for this HIPAA-compliant study. Fifteen patients with ALS (12 men, three women; mean age, 57.3 years) with clinical evidence of upper motor neuron involvement and 10 healthy control subjects (five men and five women; mean age, 49.4 years) were studied. Fractional anisotropy (FA) and apparent diffusion coefficient (ADC) were measured from the corticospinal tracts at the level of the internal capsule. Average N-acetylaspartate (NAA)/creatine-phosphocreatine (Cr) and NAA/choline-containing compounds (Cho

2006 Radiology

3158. Radiographic findings of osteoarthritis versus arthroscopic findings of articular cartilage degeneration in the tibiofemoral joint. (PubMed)

Radiographic findings of osteoarthritis versus arthroscopic findings of articular cartilage degeneration in the tibiofemoral joint. To retrospectively correlate radiographic findings of osteoarthritis of the tibiofemoral joint with arthroscopic findings of articular cartilage degeneration within the tibiofemoral joint in patients with chronic knee pain.The study was performed in compliance with HIPAA regulations. Approval from an institutional review board and a waiver of informed consent were

2006 Radiology

3159. Hepatocellular carcinoma in the cirrhotic liver: gadolinium-enhanced 3D T1-weighted MR imaging as a stand-alone sequence for diagnosis. (PubMed)

Hepatocellular carcinoma in the cirrhotic liver: gadolinium-enhanced 3D T1-weighted MR imaging as a stand-alone sequence for diagnosis. To retrospectively assess the usefulness of contrast material-enhanced T1-weighted magnetic resonance (MR) imaging alone and with T2-weighted MR imaging in the diagnosis of hepatocellular carcinoma (HCC).A waiver of informed consent and institutional review board approval for this retrospective study were granted. The study was HIPAA compliant. Twenty-eight men

2006 Radiology

3160. Supratentorial low-grade glioma resectability: statistical predictive analysis based on anatomic MR features and tumor characteristics. (PubMed)

Supratentorial low-grade glioma resectability: statistical predictive analysis based on anatomic MR features and tumor characteristics. To retrospectively assess the main variables that affect the complete magnetic resonance (MR) imaging-guided resection of supratentorial low-grade gliomas.Institutional review board approval was obtained for this retrospective HIPAA-compliant study, with the requirement for informed consent waived. Data from 101 patients (61 men, 40 women; mean age, 39 years

Full Text available with Trip Pro

2006 Radiology

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