3D reconstruction of gas cloud concentration field with high temporal and spatial resolution based on an imaging-type FTIR.

Imaging-type FTIR devices provide numerous benefits for the detection and alarm of hazardous gases. This paper presents an improved algorithm for reconstructing the 3D concentration field of gas clouds, utilizing hypothesis testing and a synchronized algebraic iteration algorithm. Specifically designed for use with imaging-type FTIR devices, this algorithm enables rapid reconstruction of gas cloud concentration fields.

Real-World Performance of Large Vessel Occlusion Artificial Intelligence-Based Computer-Aided Triage and Notification Algorithms-What the Stroke Team Needs to Know.

Purpose: To evaluate the real-world performance of two FDA-approved artificial intelligence (AI)-based computer-aided triage and notification (CADt) detection devices and compare them with the manufacturer-reported performance testing in the instructions for use.

Materials And Methods: Clinical performance of two FDA-cleared CADt large-vessel occlusion (LVO) devices was retrospectively evaluated at two separate stroke centers. Consecutive "code stroke" CT angiography examinations were included and assessed for patient demographics, scanner manufacturer, presence or absence of CADt result, CADt result, and LVO in the internal carotid artery (ICA), horizontal middle cerebral artery (MCA) segment (M1), Sylvian MCA segments after the bifurcation (M2), precommunicating part of cerebral artery, postcommunicating part of the cerebral artery, vertebral artery, basilar artery vessel segments.

A novel multi-digital camera system based on tilt-shift photography technology.

Multi-digital camera systems (MDCS) are constantly being improved to meet the increasing requirement of high-resolution spatial data. This study identifies the insufficiencies of traditional MDCSs and proposes a new category MDCS based on tilt-shift photography to improve ability of the MDCS to acquire high-accuracy spatial data. A prototype system, including two or four tilt-shift cameras (TSC, camera model: Nikon D90), is developed to validate the feasibility and correctness of proposed MDCS.

[Fludarabine-based increased-intensity conditioning regimen for allogeneic hematopoietic stem cell transplantation in acquired severe aplastic anemia].

Objective: To observe the effects of increased-intensity conditioning regimen with FBCA (Fludarabine, Busulfan, Cyclophosphamide, and Antithymocyte globulin) for allogeneic hematopoietic stem cell transplantation (allo-HSCT) in acquired severe aplastic anemia (SAA).

Methods: From January 2000 to June 2011, twenty-two patients (male 12, female 10) with SAA underwent allo-HSCT with FBCA conditioning regimen which consisted of fludarabine (30 mg·m⁻²·d⁻¹×5 d), busulfan (3 mg/kg×2 d), cyclophosphamide (60 mg·kg⁻¹·d⁻¹×2 d) and ATG (2.5 mg·kg⁻¹·d⁻¹×5 d).

[Research on crop-weed discrimination using a field imaging spectrometer].

Discrimination of weeds from crop is the first and important step for variable herbicides application and precise physical weed control. Using a new field imaging spectrometer developed by our group, hyperspectral images in the wavelength range 380-870 nm were taken in the wild for the investigation of crop-weed discrimination. After normalizing the data to reduce or eliminate the influence of varying illuminance, stepwise forward variable selection was employed to select the proper band sets and fisher linear discriminant analysis (LDA) was performed to discriminate crop and weeds.

Hepatitis C virus prevalence and clearance among US blood donors, 2006-2007: associations with birth cohort, multiple pregnancies, and body mass index.

Background: During the period 1992-1993, the prevalence of hepatitis C virus (HCV) antibodies (anti-HCV) among US blood donors was 0.36%, but contemporary data on the prevalence of antibody to HCV and the prevalence of HCV RNA are lacking.

Methods: We performed a large, cross-sectional study of blood donors at 6 US blood centers during 2006-2007.

The potential impact of selective donor deferrals based on estimated blood volume on vasovagal reactions and donor deferral rates.

Background: Whole blood donation in the United States is restricted in volume to 10.5 mL/kg or less in an effort to prevent hypovolemic reactions, but still may exceed more than 15% of a donor's estimated blood volume (EBV). We analyzed the association of EBV with prefaint and systemic vasovagal reactions (SVRs) among whole blood donors and the potential impact of an EBV-based deferral policy.

Minority and foreign-born representation among US blood donors: demographics and donation frequency for 2006.

Background: Historically, minority populations have represented only a small proportion of US blood donors, but recent trends in immigration and potential blood shortages emphasize the need for recruitment strategies to increase minority donations.

Study Design And Methods: Donation data from a network of six US blood centers for 2006 were analyzed. Race/ethnicity, country of birth, and educational attainment data were collected specifically for the study and assessed for their influence on donation behavior.

Evaluation of self-collected vaginal swab, first void urine, and endocervical swab specimens for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae in adolescent females.

Objective: To assess the concordance of self-obtained vaginal swabs (SVS), first void urine samples (FVU) and provider-collected endocervical swabs (PES) for the detection of Chlamydia trachomatis (CT) and Neisseria gonorrhea (NG) in adolescents.

Methods: A total of 342 adolescent women and 1080 baseline and semi-annual visits were analyzed. FVU, SVS and PES were collected at each biannual visit.

PSA velocity for assessing prostate cancer risk in men with PSA levels between 2.0 and 4.0 ng/ml.

Objectives: To evaluate the use of prostate-specific antigen (PSA) velocity (PSAV) in assessing prostate cancer risk among men with PSA levels less than 4.0 ng/mL.

Methods: The relative risk of, and cumulative probability of freedom from, prostate cancer by PSAV was evaluated in 89 male participants (21 with cancer and 68 controls) of a longitudinal aging study-the Baltimore Longitudinal Study of Aging (National Institute on Aging)-who had serial PSA levels between 2.

Prostate specific antigen predicts the long-term risk of prostate enlargement: results from the Baltimore Longitudinal Study of Aging.

Purpose: Prostate specific antigen (PSA) is a predictor of prostate growth in men with lower urinary tract symptoms. The long-term risk of prostate enlargement as a function of PSA among community dwelling volunteers is unknown.

Materials And Methods: A Cox proportional hazards regression model was used to study the relationship between baseline PSA level at ages 40 to 49.