OBJECTIVE Effective July 1, 2012, CT dose reporting became mandatory in California. We sought to assess radiologist compliance with this legislation and to determine areas for improvement. MATERIALS AND METHODS We retrospectively reviewed reports from all chest CT examinations performed at our institution from July 1, 2012, through June 30, 2013, for errors in documentation of volume CT dose ...

.00 .00 .00 .00 .17 .3 .3 1.5 RGBC MYW (if 3 extra basis were introduced: W=min(R,G,B) C=min(B,G) – W M=min(R,B) – W Y=min(R,G) – W .00 .00 .00 .2 .3 .3 1.5 RGBW (if 4th base was introduced as w=min(RGB) ) .04 .11 2.7 4.9 9.1 51 RGB (if only 3 basis was used) B8 B7 B6 B5 B4 B3 B2 B1 Number of Basis Vectors PCA can be used to determine how many basis are needed to predict the tristimulus values ...

We present a new database of lexical decision times for English words and nonwords, for which two groups of British participants each responded to 14,365 monosyllabic and disyllabic words and the same number of nonwords for a total duration of 16 h (divided over multiple sessions). This database, called the British Lexicon Project (BLP), fills an important gap between the Dutch Lexicon Project ...

OBJECTIVE To propose Irish CT diagnostic reference levels (DRLs) by collecting radiation doses for the most commonly performed CT examinations. METHODS A pilot study investigated the most frequent CT examinations. 40 CT sites were then asked to complete a survey booklet to allow the recording of CT parameters for each of 9 CT examinations during a 12-week period. Dose data [CT volume index (C...

DLP (Digital Light Processing) is in the process of dramatically changing the performance expectations with respect to stereo applications, one of the last bastions of CRT projection technology. This paper discusses stereo and the application of DLP projectors. In addition to currently available high brightness DLP projectors, we present new results with using small economical single chip DLP p...

BACKGROUND The use of pediatric CT that had recently emerged as a valuable imaging tool has increased rapidly with an annual growth estimated at about 10% per year. Worldwide, there is a remarkable increase in the number of CT examinations performed. The purposes of this study are to: (i) to measure the radiation dose and estimate the effective doses to pediatric patients during CT for chest, a...

PURPOSE To compare radiation dose and image quality using predefined narrow phase window versus complete phase window with dose modulation during R-R using 320-row MDCTA. METHODS 114 patients underwent coronary CTA study using 320-row MDCT scanner. 87 patients with mean age (61 + 13 years), mean BMI (29 + 6), and mean heart rate (HR) (58 + 7 bpm) were imaged at predefined 66-80% R-R interval ...

Abstract. Let k = Fq be a finite field of odd characteristic. We find a closed formula for the number of k-isomorphism classes of pointed, and non-pointed, hyperelliptic curves of genus g over k, admitting a Koblitz model. These numbers are expressed as a polynomial in q with integer coefficients (for pointed curves) and rational coefficients (for nonpointed curves). The coefficients depend on ...

OBJECTIVES To assess radiation exposure due to CT in the Netherlands. METHODS Twenty-one hospitals participated in a dose survey for the 21 most frequently used CT protocols. Hospitals completed a Web survey with detailed parameters for one patient per protocol, including the dose length product (DLP) from the scanner dose report. Only standard-sized patients (1.74 m and 77 kg and BMI 25.4 kg...