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3181. Can high-attenuation renal cysts be differentiated from renal cell carcinoma at unenhanced CT? (PubMed)

Can high-attenuation renal cysts be differentiated from renal cell carcinoma at unenhanced CT? To retrospectively determine if renal cell carcinoma can be differentiated from high-attenuation renal cysts at unenhanced computed tomography (CT) based on Hounsfield unit measurements and heterogeneity.The Human Investigation Committee at our institution approved this study with waiver of informed consent. This study was compliant with the HIPAA. Fifty-four pathologically proved renal cell

2007 Radiology

3182. Suspected appendicitis in children: rectal and intravenous contrast-enhanced versus intravenous contrast-enhanced CT. (PubMed)

Suspected appendicitis in children: rectal and intravenous contrast-enhanced versus intravenous contrast-enhanced CT. To retrospectively compare the diagnostic performance of intravenous contrast material-enhanced computed tomography (CT) with that of intravenous and rectal contrast-enhanced CT in the evaluation of children suspected of having appendicitis by using pathologic findings, surgical findings, or a follow-up telephone call as the reference standard.This HIPAA-compliant study

2007 Radiology

3183. Intraaxial brain masses: MR imaging-based diagnostic strategy--initial experience. (PubMed)

Intraaxial brain masses: MR imaging-based diagnostic strategy--initial experience. To develop and retrospectively determine the accuracy of a magnetic resonance (MR) imaging strategy to differentiate intraaxial brain masses, with histologic findings or clinical diagnosis as the reference standard.The study was HIPAA compliant and was approved by the institutional review board. A waiver of informed consent was obtained. A strategy was developed on the basis of conventional MR imaging, diffusion

2007 Radiology

3184. Teniae coli-based circumferential localization system for CT colonography: feasibility study. (PubMed)

Teniae coli-based circumferential localization system for CT colonography: feasibility study. This HIPAA-compliant study, with institutional review board approval and informed patient consent, was conducted to retrospectively develop a teniae coli-based circumferential localization method for guiding virtual colon navigation and colonic polyp registration. Colonic surfaces (n = 72) were depicted at computed tomographic (CT) colonography performed in 36 patients (26 men, 10 women; age range, 47

2007 Radiology

3185. Influence of needle tip position on injectate spread in 406 interlaminar lumbar epidural steroid injections. (PubMed)

Influence of needle tip position on injectate spread in 406 interlaminar lumbar epidural steroid injections. To retrospectively evaluate flow patterns of interlaminar lumbar epidural steroid injections and compare these patterns to needle tip position.This study was approved by the institutional review board and complied with HIPAA guidelines. The requirement for informed consent was waived. Fluoroscopic images from 701 consecutive lumbar epidural steroid injections in 485 patients were

2007 Radiology

3186. Head and neck cancer: dedicated FDG PET/CT protocol for detection--phantom and initial clinical studies. (PubMed)

Head and neck cancer: dedicated FDG PET/CT protocol for detection--phantom and initial clinical studies. To retrospectively compare the sensitivity of a dedicated fluorine 18 fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) protocol versus a standard whole-body PET/CT protocol for detection of head and neck cancer, with biopsy and follow-up as reference standards.Institutional review board approval and informed consent were obtained for this HIPAA-compliant

2007 Radiology

3187. Does two-segment image reconstruction at 64-section CT coronary angiography improve image quality and diagnostic accuracy? (PubMed)

was HIPAA compliant. Forty consecutive patients (22 men, 18 women; mean age, 61 years +/- 8 [standard deviation]) underwent both 64-section multidetector CT coronary angiography and conventional angiography. All data sets were reconstructed by using single- and two-segment image reconstruction algorithms, with resulting temporal resolution of 82.5-165 msec. Two experienced observers independently evaluated image quality and signs of coronary artery disease. A five-level grading scheme was used to grade

2007 Radiology

3188. Cystic changes at supraspinatus and infraspinatus tendon insertion sites: association with age and rotator cuff disorders in 238 patients. (PubMed)

Cystic changes at supraspinatus and infraspinatus tendon insertion sites: association with age and rotator cuff disorders in 238 patients. To retrospectively determine the frequency of posterior and anterior cystic abnormalities at rotator cuff insertion site on the greater tuberosity and to determine their relationship to patient age and rotator cuff disorders.Institutional review board approval was given; informed consent was waived. The study was HIPAA compliant. In 238 patients with rotator

2007 Radiology

3189. Uterine fibroid embolization: the utility of aortography in detecting ovarian artery collateral supply. (PubMed)

of UFE.This study received institutional review board approval with waiver of informed consent and was HIPAA compliant. Retrospective review of 1129 consecutive UFE patients (1072 with aortograms, 57 excluded; mean age, 44 years; range, 21-60 years) was performed to identify all visible OAs. Visible OAs were independently graded by two interventional radiologists according to extent of pelvic arterial flow. If selective arteriography was performed, a second grade was assigned based on assessment

2007 Radiology

3190. Benign and malignant lesions in the human breast depicted with ultrahigh resolution and three-dimensional optical coherence tomography. (PubMed)

Benign and malignant lesions in the human breast depicted with ultrahigh resolution and three-dimensional optical coherence tomography. Institutional review board approval at the participating institutions was obtained. Informed consent was waived for this HIPAA-compliant study. The study purpose was to establish the correspondence of optical coherence tomographic (OCT) image findings with histopathologic findings to understand which features characteristic of breast lesions can be visualized

2007 Radiology

3191. Cancer yield of mammography, MR, and US in high-risk women: prospective multi-institution breast cancer screening study. (PubMed)

Cancer yield of mammography, MR, and US in high-risk women: prospective multi-institution breast cancer screening study. To prospectively determine cancer yield, callback and biopsy rates, and positive predictive value (PPV) of mammography, magnetic resonance (MR) imaging, and ultrasonography (US) in women at high risk for breast cancer.The study was approved by the institutional review board and was HIPAA compliant, and informed consent was obtained. We conducted a prospective pilot study

2007 Radiology

3192. Juvenile and adult congenital heart disease: time-resolved 3D contrast-enhanced MR angiography. (PubMed)

Juvenile and adult congenital heart disease: time-resolved 3D contrast-enhanced MR angiography. To assess the incremental diagnostic value of time-resolved three-dimensional (3D) magnetic resonance (MR) angiography over single-phase 3D MR angiography and cine MR imaging in juvenile and adult patients with congenital heart disease (CHD).The study was HIPAA compliant and was approved by the institutional review board. Written informed consent was obtained from each patient. Eighty-one consecutive

2007 Radiology

3193. Left ventricular spherical remodeling and apical myocardial relaxation: cardiovascular MR imaging measurement of myocardial segments. (PubMed)

Left ventricular spherical remodeling and apical myocardial relaxation: cardiovascular MR imaging measurement of myocardial segments. To prospectively evaluate left ventricular (LV) shape and regional relaxation to determine if rapid, early relaxation of the LV is lost with spherical remodeling of the LV.This HIPAA-compliant study was approved by the institutional review board. All participants gave written informed consent. Cardiovascular magnetic resonance (MR) imaging and transthoracic

2007 Radiology

3194. CT colonography in 546 patients with incomplete colonoscopy. (PubMed)

CT colonography in 546 patients with incomplete colonoscopy. To retrospectively evaluate the positive predictive value (PPV) of computed tomographic (CT) colonography performed in patients who were referred for further examination after incomplete colonoscopy.This HIPAA-compliant retrospective study was approved by the institutional review board; informed consent was waived. We identified 546 consecutive patients (mean age, 64.1 years; 401 [73.4%] women) who underwent CT colonography after

2007 Radiology

3195. Solid renal cortical tumors: differentiation with CT. (PubMed)

Solid renal cortical tumors: differentiation with CT. To retrospectively determine if solid renal cortical tumors can be differentiated on computed tomographic (CT) images on the basis of their morphologic features and enhancement patterns.Institutional review board approval was obtained and the informed consent requirement was waived for this HIPAA-compliant study. Between January 2004 and September 2005, 193 consecutive patients (age range, 19-95 years; 112 men, 81 women) with renal masses

2007 Radiology

3196. Semiautomated MIP images created directly on 16-section multidetector CT console for evaluation of living renal donors. (PubMed)

Semiautomated MIP images created directly on 16-section multidetector CT console for evaluation of living renal donors. Institutional Review Board approval was obtained and informed consent was waived for this HIPAA-compliant study. The aim of this study was to retrospectively compare the accuracy of semiautomated maximum intensity projection (MIP) images created at a 16-section multidetector CT console with three-dimensional (3D)-workstation-generated images for the definition of renal donor

2007 Radiology

3197. Chronic hypersensitivity pneumonitis: CT features comparison with pathologic evidence of fibrosis and survival. (PubMed)

, which was HIPAA compliant. Twenty-six patients (15 women, 11 men; age range, 37-76 years) with chronic HP had their surgical lung biopsy results reviewed by two pathologists for the presence of fibrosis. Two radiologists systematically reviewed the CT scans. The two radiologists were blinded to all clinical information, including pathologic diagnosis, patient information, and outcomes. The combination of a subpleural reticular pattern and lower zone predominance was considered a UIP pattern. CT

2007 Radiology

3198. The cisterna chyli: enhancement on delayed phase MR images after intravenous administration of gadolinium chelate. (PubMed)

The cisterna chyli: enhancement on delayed phase MR images after intravenous administration of gadolinium chelate. To retrospectively evaluate cisterna chyli (CC) enhancement on magnetic resonance (MR) images obtained after intravenous administration of a gadolinium-based contrast agent.This retrospective HIPAA-compliant study of 1.5-T MR imaging findings was institutional review board approved; informed patient consent was waived. All MR examinations involved the acquisition of heavily T2

2007 Radiology

3199. Discordance between CT and angiography in the PIOPED II study. (PubMed)

Discordance between CT and angiography in the PIOPED II study. To retrospectively evaluate the causes of discordant computed tomographic (CT)-angiographic readings from the Prospective Investigation of Pulmonary Embolism Diagnosis, or PIOPED, II study.Institutional review board approval was obtained for this HIPAA-compliant study. Of 1036 patients suspected of having pulmonary embolism who were examined with CT, 226 underwent angiography; 206 patients had concordant results and 20 had

2007 Radiology

3200. Multiple sclerosis: hyperintense lesions in the brain on nonenhanced T1-weighted MR images evidenced as areas of T1 shortening. (PubMed)

Multiple sclerosis: hyperintense lesions in the brain on nonenhanced T1-weighted MR images evidenced as areas of T1 shortening. To retrospectively document hyperintense lesions on nonenhanced T1-weighted magnetic resonance (MR) images in patients with multiple sclerosis (MS) and study their relationship to physical disability, disease course, and other MR markers of tissue damage (brain atrophy).Institutional review board approval was obtained; informed consent was waived for this HIPAA

2007 Radiology

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