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OBJECTIVES Dose reduction has become a major issue in computed tomography (CT). The benefit of kilovolt (kV) reduction has been demonstrated in CT angiography. We sought to evaluate an attenuation-based fully automated kV-selection and milliampere second-adaption algorithm for CT and to assess radiation dose and image quality in comparison with a standard(More)
Isokinetic torque deficit of the knee extensor muscles in the operated leg was measured in 21 male patients (mean age 26.4±1.9 years) who had undergone arthroscopic partial medial meniscectomy. The isokinetic torque testing was performed 1, 3, and 6 months postoperatively using the Cybex II dynamometer according to standard technique. Isokinetic knee(More)
Low tube voltage allows for computed tomography (CT) imaging with increased iodine contrast at reduced radiation dose. We sought to evaluate the image quality and potential dose reduction using a combination of attenuation based tube current modulation (TCM) and automated tube voltage adaptation (TVA) between 100 and 120 kV in CT of the head and neck. One(More)
OBJECTIVE To investigate and report cases of human immunodeficiency virus (HIV) transmission through donor artificial insemination (AI) before 1986 at five infertility clinics. DESIGN Two types of look-back studies were performed: (1) identification of an HIV-infected woman who reported previous AI, followed by identification of the infected donor(s) and(More)
OBJECTIVE Our purpose was to determine whether women pregnant with multiple gestations are at greater risk for perinatal listeriosis than are women pregnant with singletons. STUDY DESIGN Active surveillance for perinatal listeriosis was carried out in Los Angeles County, California, medical records were reviewed, and rates of listeriosis were calculated(More)
BACKGROUND AND PURPOSE CT is the imaging technique of choice in the evaluation of midface trauma or inflammatory disease. We performed a systematic evaluation of scan protocols to optimize image quality and radiation exposure on third-generation dual-source CT. MATERIALS AND METHODS CT protocols with different tube voltage (70-150 kV), current (25-300(More)
Using community-based surveillance data for pediatric human immunodeficiency virus (HIV) infection, we examined disease progression using survival analysis among perinatally HIV-infected children and children HIV-infected through a neonatal blood transfusion. As of December 31, 1991, 238 HIV-infected children (classified P-1 or P-2 according to the Centers(More)
BACKGROUND AND PURPOSE CTA is considered the imaging modality of choice in evaluating the supraaortic vessels in many institutions, but radiation exposure remains a matter of concern. The objective of the study was to evaluate a fully automated, attenuation-based kilovolt selection algorithm in carotid CTA in respect to radiation dose and image quality(More)
OBJECTIVES The objective of this study was to evaluate the radiation dose and image quality performance of thoracoabdominal examinations with an automated tube voltage selection (tube voltage adaptation), tube current modulation, and high pitch using a third-generation dual-source computed tomography (CT) compared intraindividually with 120-kV examinations(More)
OBJECTIVES To evaluate an automated attenuation-based kV-selection in computed tomography of the chest in respect to radiation dose and image quality, compared to a standard 120 kV protocol. MATERIALS AND METHODS 104 patients were examined using a 128-slice scanner. Fifty examinations (58 ± 15 years, study group) were performed using the automated(More)