diplomsko delo
Nina Prša (Author), Tina Starc (Reviewer), Mojca Medič (Mentor)

Abstract

Uvod: V okviru diplomskega dela smo ugotavljali, kako sprememba razdalje objekt-slikovni sprejemnik vpliva na velikost objekta na sliki. Namen: Namen diplomskega dela je bil ugotoviti, kako razdalja objekt?slikovni sprejemnik vpliva na velikost objekta prikazanega na sliki. Ekspozicijske pogoje smo uravnavali tako, da je bil ekspozicijski indeks enak, ker smo želeli, da na kontrastnost slike ne bi vplivalo nižje razmerje signal-šum. Metode dela: V okviru diplomskega dela smo izvajali več meritev. Najprej smo spreminjali razdaljo objekt-slikovni sprejemnik v razponu od 10 cm do 50 cm za 5 cm, najprej pri razdalji gorišče-slikovni sprejemnik 100 cm, nato pa smo jo postopoma večali do vrednosti 140 cm. Pri vsaki meritvi smo izmerili velikost tretje prstnice. Rezultati: Ugotovili smo, da se velikost tretje prstnice linearno povečuje, če povečujemo razdaljo objekt?slikovni sprejemnik, razdaljo gorišče–slikovni sprejemnik pa pustimo nespremenjeno. Pri spremembi obeh razdalj objekt?slikovni sprejemnik in gorišče–slikovni sprejemnik pa se povečuje eksponentno. Razprava in zaključek: Z večanjem razdalje objekt?slikovni sprejemnik se povečuje velikost objekta na sliki. Ugotovili smo, da če razdaljo gorišče?slikovni sprejemnik spremenimo za toliko centimetrov, za kolikor je bila spremenjena razdalja objekt?slikovni sprejemnik, bo povečava na sliki manjša.

Keywords

diplomska dela;radiološka tehnologija;razdalja objekt-slikovni sprejemnik;razdalja gorišče-slikovni sprejemnik;radiološka fizika;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL ZF - University College of Health Studies
Publisher: [N. Prša]
UDC: 616-07
COBISS: 27491587 Link will open in a new window
Views: 377
Downloads: 105
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Other data

Secondary language: English
Secondary title: ǂThe ǂimpact of object to image receptor distance on object's size
Secondary abstract: Introduction: In the course of the thesis, we investigated how the object to image receptor distance influenced on object's size. Purpose: The purpose of the diploma work was to find out, how the object to image receptor distance influenced on object's size on radiogram. We regulated exposition conditions so that exposure index was the same, because we wanted to stop the influence of lower signal to noise ratio on contrast resoultion of radiogram. Methods: In the course of the thesis we performed a few measures. First we were changing object to image receptor distance in the range from 10 cm to 50 cm for 5 cm at the source to image receptor distance 100 cm and then we gradually raise it untill 140 cm. In each measurement we measured the length of third proximal phalange. Results: We found that the size of the third proximal phalange increase linearly if we increase the object to image receptor distance and leave source to image receptor distance unchanged. However as both distances change, the object to image receptor and the source to image receptor increase exponentially. Discussion and conclusion: By increasing the distance between the object and image receptor, the size of the object in the image increases. We found out that if we change the source to image receptor distance by as many centimeters as the object to image receptor distance is changed, the magnification in the image will be smaller.
Secondary keywords: diploma theses;radiologic technology;object to image receptor distance;source to image receptor distance;radiology physics;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Zdravstvena fak., Oddelek za radiološko tehnologijo
Pages: 17 str.
ID: 12025917