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Nodine, Calvin F. This paper shows how Hirschfeld's search task of finding the name NINA in his drawings illustrates basic perceptual principles of detection, discrimination and decision-making commonly encountered in radiology search tasks. Hirschfeld's hiding of NINA is typically accomplished by camouflaging the letters of the name and blending them into scenic background details such as wisps of hair and folds of clothing.

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In a similar way, pulmonary nodules and breast lesions are camouflaged by anatomic perte de poids leesville la of the chest or breast image. Hirschfeld's hidden NINAs are sometimes missed because they are integrated into a Gestalt overview rather than differentiated from background features during focal scanning.

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This may be similar to overlooking an obvious nodule behind the heart in a chest x-ray image. Because it is a search game, Hirschfeld assigns a number to each drawing to indicate how many NINAs he has hidden so as not to frustrate his viewers.

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In the radiologists' task, the number of targets detected in a medical image is determined by combining perceptual input with probabilities generated from clinical history and viewing experience. Thus, in the absence of truth, searching for abnormalities in x-ray images creates opportunities for recognition and decision errors e.

Он решил, что, возможно, приближение корабля загнало обитателей плато под землю. Они висели над самой поверхностью, пока Олвин пытался убедить Хилвара, что открыть воздушный шлюз -- совсем безопасно, а Хилвар, со своей стороны, терпеливо объяснял ему, что такое вирусы, бактерии и грибки, и Олвин не мог их себе вообразить и еще меньше был способен понять, какое они имеют к нему отношение. Спор длился уже несколько минут, когда они не без любопытства заметили, что экран, который лишь минуту назад исправно показывал им панораму леса, стеной стоящего впереди, погас. -- Это ты его выключил. -- спросил Хилвар, на мгновение, как обычно, опередив Олвина.

We illustrate how camouflage decreases the conspicuity of both artistic and radiographic targets, compare detection performance of radiologists with lay persons searching for NINAs, and, show similarities and differences between scanning strategies of the two groups based on eye-position data.

It has been orbiting the Earth onboard the Russian satellite Resource 01 n.

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It can perform nuclear discrimination from hydrogen to iron as well as isotopic analyses at least up to the beryllium isotopes in a large energy range. The core of NINA is a segmented silicon detector mounted onto the satellite so to point to the zenith.

Early years[ edit ] Pittman was born in Frankfurt, Germanywhere his father was stationed with the United States Army. After five moves, his family settled in Leesville, Louisianawhere as a senior at Leesville High School he was an All-State selection and the district Most Valuable Player, after finishing with 94 tackles and 12 sacks.

The detector has mass resolution of about 0. For each event the deuterium-to-proton ratio was also estimated.

Никаких сомнений не оставалось, когда Элвин обнаружил на холмике близ корабля ряд пологих насыпей, каждая метра в три - Так, значит, они сели здесь, - размышлял Хилвар, - и проигнорировали предупреждение. Они были любопытны. так же, как и. Они попытались открыть этот купол.

Its main scientific task is to study the Galactic, solar, and anomalous components of cosmic rays in the energy interval MeV nucleon In this paper we present a description of the instrument and its basic operating modes. Measurements of Galactic cosmic-ray spectra will also be shown.

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