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3041. CT screening for lung cancer: five-year prospective experience. (PubMed)

CT screening for lung cancer: five-year prospective experience. To report results of a 5-year prospective low-dose helical chest computed tomographic (CT) study of a cohort at high risk for lung cancer.After informed written consent was obtained, 1520 individuals were enrolled. Protocol was approved by institutional review board and National Cancer Institute and was compliant with Health Insurance Portability and Accountability Act, or HIPAA. Participants were aged 50 years and older and had

2005 Radiology

3042. Vascular mapping of the leg with multi-detector row CT angiography prior to free-flap transplantation. (PubMed)

Vascular mapping of the leg with multi-detector row CT angiography prior to free-flap transplantation. To retrospectively evaluate multi-detector row computed tomographic (CT) angiography in determining donor- and recipient-site arterial suitability for successful vascularized free-flap transplantation.The institutional review board granted approval; informed consent was waived, and the study was HIPAA compliant. Lower extremities of 20 (12 male, eight female; mean age, 51 years; range, 10-84

2005 Radiology

3043. Linear polyp measurement at CT colonography: in vitro and in vivo comparison of two-dimensional and three-dimensional displays. (PubMed)

Linear polyp measurement at CT colonography: in vitro and in vivo comparison of two-dimensional and three-dimensional displays. To compare the accuracy of polyp measurement at computed tomographic (CT) colonography by using two-dimensional (2D) multiplanar reformation (MPR) and three-dimensional (3D) endoluminal displays obtained both in a colon phantom and at clinical examinations.This HIPAA-compliant study had institutional review board approval, and all patients provided signed informed

2005 Radiology

3044. Assessment of acute renal transplant rejection with blood oxygen level-dependent MR imaging: initial experience. (PubMed)

Assessment of acute renal transplant rejection with blood oxygen level-dependent MR imaging: initial experience. To prospectively assess the oxygenation state of renal transplants and determine the feasibility of using blood oxygen level-dependent (BOLD) magnetic resonance (MR) imaging to differentiate between acute tubular necrosis (ATN), acute rejection, and normal function.This HIPAA-compliant study had institutional human subjects review committee approval, and written informed consent

2005 Radiology

3045. The flexor hallucis longus: tenographic technique and correlation of imaging findings with surgery in 39 ankles. (PubMed)

The flexor hallucis longus: tenographic technique and correlation of imaging findings with surgery in 39 ankles. To examine the use of tenography for evaluation of the flexor hallucis longus (FHL) sheath.Institutional review board approval was waived, patient consent was obtained, and the study was HIPAA compliant. Retrospective review of 192 FHL tenograms and associated surgical records identified 39 ankles in 37 patients (17 male, 20 female; mean age +/- standard deviation, 38 years +/- 13.8

2005 Radiology

3046. Untreated pediatric primitive neuroectodermal tumor in vivo: quantitation of taurine with MR spectroscopy. (PubMed)

. This study was HIPAA compliant. Single-voxel proton spectroscopy was added to the preoperative MR imaging work-up of 29 patients (12 boys and 17 girls; mean age, 6.5 years +/- 3.5) with untreated brain tumors; 13 had PNETs, and 16 had other tumors. Absolute concentrations (measured in millimoles per kilogram of brain tissue) of metabolites of the proton spectrum were determined. Student t tests were used for statistical comparisons.Elevated absolute Tau concentration proved to be the most significant

2005 Radiology

3047. Efficacy and safety of MR imaging with liver-specific contrast agent: U.S. multicenter phase III study. (PubMed)

consent were obtained. HIPAA went into effect after data collection. A total of 172 patients were enrolled. After precontrast MR imaging, 169 patients (94 men, 75 women; mean age, 61 years; age range, 19-84 years) received an intravenous bolus of 25 micromol/kg Gd-EOB-DTPA and underwent dynamic gradient-recalled-echo and delayed MR imaging 20 minutes after injection. Arterial and portal phase computed tomography (CT) were performed within 6 weeks of MR imaging. The standard of reference was surgery

2005 Radiology

3048. Occult breast cancer: scintimammography with high-resolution breast-specific gamma camera in women at high risk for breast cancer. (PubMed)

Occult breast cancer: scintimammography with high-resolution breast-specific gamma camera in women at high risk for breast cancer. To prospectively evaluate a high-resolution breast-specific gamma camera for depicting occult breast cancer in women at high risk for breast cancer but with normal mammographic and physical examination findings.Institutional Review Board approval and informed consent were obtained. The study was HIPAA compliant. Ninety-four high-risk women (age range, 36-78 years

2005 Radiology

3049. Pain control requirements for percutaneous ablation of renal tumors: cryoablation versus radiofrequency ablation--initial observations. (PubMed)

Pain control requirements for percutaneous ablation of renal tumors: cryoablation versus radiofrequency ablation--initial observations. To retrospectively compare the pain control requirements of patients undergoing computed tomography (CT)-guided percutaneous radiofrequency (RF) ablation with those of patients undergoing CT-guided percutaneous cryoablation of small (< or = 4-cm) renal tumors.The study was HIPAA compliant and received institutional review board exemption; informed consent

2005 Radiology

3050. Effect of CT image compression on computer-assisted lung nodule volume measurement. (PubMed)

Effect of CT image compression on computer-assisted lung nodule volume measurement. To evaluate the effect of two-dimensional wavelet-based computed tomographic (CT) image compression according to the Joint Photographic Experts Group (JPEG) 2000 standard on computer-assisted assessment of nodule volume.This HIPAA-compliant study was approved by the research board at the authors' institution; patients' informed consent was not required. Fifty-one nodules in 23 patients (seven men, 16 women; mean

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2005 Radiology

3051. Liver and spleen volumetry with quantitative MR imaging and dual-space clustering segmentation. (PubMed)

Liver and spleen volumetry with quantitative MR imaging and dual-space clustering segmentation. The purpose of this HIPAA-compliant, institutional review board-approved study was to assess the liver and spleen volumes calculated by using a semiautomated dual-space clustering segmentation technique, as compared with the volumes calculated by using the manual contour-tracing method. The quantitative magnetic resonance (MR) imaging data used as input were computed from images acquired by using

2005 Radiology

3052. Appendicitis in children: low-dose CT with a phantom-based simulation technique--initial observations. (PubMed)

Appendicitis in children: low-dose CT with a phantom-based simulation technique--initial observations. To retrospectively determine the accuracy of low-dose (20-mAs) computed tomography (CT) in the diagnosis of acute appendicitis in children by using a technique that enables the simulation of human CT scans acquired at a lower tube current given the image acquired at a standard dose.Institutional review board approval was obtained, informed consent was not required, and the study was HIPAA

2005 Radiology

3053. Whole-body CT screening: spectrum of findings and recommendations in 1192 patients. (PubMed)

Whole-body CT screening: spectrum of findings and recommendations in 1192 patients. To retrospectively determine the frequency and spectrum of findings and recommendations reported with whole-body computed tomographic (CT) screening at a community screening center.This HIPAA-compliant study received institutional review board approval, with waiver of informed consent. The radiologic reports of 1192 consecutive patients who underwent whole-body CT screening of the chest, abdomen, and pelvis

2005 Radiology

3054. Benign versus malignant breast masses: optical differentiation with US-guided optical imaging reconstruction. (PubMed)

. Signed informed consent was obtained, and the study was HIPAA compliant. Between May 2003 and March 2004, 65 consecutive women (mean age, 51 years; age range, 24-80 years) with 81 breast lesions underwent US-guided biopsy and were scanned with a combined imager. The hand-held probe, which consisted of a centrally located US transducer surrounded by near-infrared sensors, was used to simultaneously acquire coregistered US images and optical data. The lesion location obtained at US was used to guide

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2005 Radiology

3055. Exclusion of unstable cervical spine injury in obtunded patients with blunt trauma: is MR imaging needed when multi-detector row CT findings are normal? (PubMed)

are normal.The study was HIPAA compliant and institutional review board approved. Informed consent was not required. From April 2001 to November 2003, 1400 trauma patients underwent MR imaging of the cervical spine to evaluate potential cervical spine injuries. Multi-detector row CT of the cervical spine was performed with a four- or 16-detector row scanner. MR imaging of the cervical spine was performed with transverse gradient-echo, sagittal intermediate-weighted, sagittal short inversion time inversion

2005 Radiology

3056. Nontraumatic acute abdominal pain: unenhanced helical CT compared with three-view acute abdominal series. (PubMed)

Nontraumatic acute abdominal pain: unenhanced helical CT compared with three-view acute abdominal series. To prospectively evaluate and compare the diagnostic accuracy of unenhanced helical computed tomography (CT) for patients with nontraumatic acute abdominal pain with that of traditional abdominal radiography.Institutional review board approval and informed consent were obtained; this study was completed before implementation of the HIPAA. Ninety-one patients (44 men; 47 women; age range, 18

2005 Radiology

3057. Effect of dutasteride therapy on Doppler US evaluation of prostate: preliminary results. (PubMed)

Effect of dutasteride therapy on Doppler US evaluation of prostate: preliminary results. To prospectively determine the effect of short-term therapy with dutasteride on the suppression of Doppler ultrasonographic (US) signal in benign prostate tissue and thus on improvement in the depiction of prostate cancer with Doppler US-guided core-needle biopsy.After institutional review board approval and informed consent were obtained as part of this HIPAA-compliant study, 11 men (age range, 59-77 years

2005 Radiology

3058. Radiography and US of os peroneum fractures and associated peroneal tendon injuries: initial experience. (PubMed)

Radiography and US of os peroneum fractures and associated peroneal tendon injuries: initial experience. To retrospectively evaluate the imaging features of os peroneum fractures and associated peroneus longus tendon injuries at radiography and ultrasonography (US) and to retrospectively compare these imaging features with those of multipartite os peroneum.Institutional review board approval was obtained and informed consent was waived for this HIPAA-compliant study. Retrospective review

2005 Radiology

3059. Adverse cardiovascular and respiratory events during sedation of pediatric patients for imaging examinations. (PubMed)

Adverse cardiovascular and respiratory events during sedation of pediatric patients for imaging examinations. To retrospectively identify factors associated with an increased risk of adverse cardiovascular or respiratory events during sedation of pediatric patients for imaging examinations.This HIPAA-compliant study was institutional review board approved; the requirement for informed consent was waived. All sedation information--including patient demographics, medications (doses and routes

2005 Radiology

3060. CT images of abdomen and pelvis: effect of nonlinear three-dimensional optimized reconstruction algorithm on image quality and lesion characteristics. (PubMed)

CT images of abdomen and pelvis: effect of nonlinear three-dimensional optimized reconstruction algorithm on image quality and lesion characteristics. The purpose of this study was to retrospectively assess the effect of a postprocessing nonlinear three-dimensional optimized reconstruction algorithm on image quality and lesion characteristics in abdominal and pelvic computed tomographic (CT) images. Institutional review board approved the HIPAA-compliant study protocol; informed consent

2005 Radiology

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