نتایج جستجو برای: radiographic magnification

تعداد نتایج: 34506  

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
maryam paknahad oral radiology department, dental school, shiraz university of medical sciences, shiraz, iran. mahvash hasani oral radiology department, dental school, shiraz university of medical sciences, shiraz, iran. mahsa hasani medical school, shiraz university of medical sciences, shiraz, iran. alireza evazpour dental school, shiraz university of medical sciences, shiraz, iran.

introdouction: the aim of the present study was to investigate image magnification in digital panoramic radiography and assess the effect of anatomical sites on the magnification in both males and females. materials and methods: in this retrospective study, digital panoramic radiographs of 48 patients with 202 implants were investigated. implant diameter and length were measured on panoramic ra...

Journal: :Circulation 1981
J A Wisneski C N Pfeil D G Wyse R Mitchell S H Rahimtoola E W Gertz

The ejection fraction is one of the most widely used measurements of left ventricular systolic function. Angiographic measurement of ejection fraction is based on determination of roentgenographic magnification and calculation of end-diastolic and end-systolic volumes, assuming a prolated ellipse. Because it is simple and radiographic magnification may not have been determined, some laboratorie...

Journal: :Dental press journal of orthodontics 2013
José Rino Neto João Batista de Paiva Gilberto Vilanova Queiroz Miguel Ferragut Attizzani Hiroshi Miasiro Junior

OBJECTIVE The purpose of this study was to evaluate the influence of the magnification factor of the radiographic image in angular, linear and proportional measurements. METHODS From a dried human skull where metallic spheres with predetermined size were fixed (1.0 mm), 14 radiographs were obtained in devices from three different manufacturers: Panoura, Instrumentarium and Tomeceph. The Pears...

2005
JUDITH A. WISNESKI CATHERINE N. PFEIL GEORGE WYSE

The ejection fraction is one of the most widely used measurements of left ventricular systolic function. Angiographic measurement of ejection fraction is based on determination of roentgenographic magnification and calculation of end-diastolic and end-systolic volumes, assuming a prolated ellipse. Because it is simple and radiographic magnification may not have been determined, some laboratorie...

2017
Jana Hornová Pavel Růžička Maroš Hrubina Eduard Šťastný Andrea Košková Petr Fulín Jiří Gallo Matej Daniel

Preoperative planning for total hip arthroplasty includes templating on anteroposterior radiographs. It is necessary to consider radiographic magnification in order to scale templates accurately. Studies dealing with hip templating report different values of radiographic magnification. It is not clear if the observed difference in magnification between the studies is caused by variability in st...

ژورنال: مجله دندانپزشکی 2013
باشی‌زاده فخار, حوریه, تیموری‌نژاد, علی, مولایی, ندا,

Background and Aims: The Panoramic radiography is one of the routine techniques in implant imaging. Although there are some limitations with this technique, panoramic radiography is radiographic choice for basic evaluation for implant treatment. Many studies have been designed to determine magnification in panoramic images but most of them were performed on dry skulls or radiographic phantoms. ...

Journal: :Medicina oral, patologia oral y cirugia bucal 2010
Jun-Beom Park

OBJECTIVES This study was conducted 1/ to find out the effects of anatomical sites and implant types on the magnification and 2/ to evaluate the inter-observer variability on the evaluation using the digital panoramas taken at daily practices. STUDY DESIGN Panoramic radiographs from 156 patients treated with implants were evaluated by three observers. The length was measured on the lateral as...

Journal: :Veterinary and comparative orthopaedics and traumatology : V.C.O.T 2012
R Plesman A Sharma P Gilbert J Campbell J D Johnston C Shmon K Linn

OBJECTIVES The primary objective was to develop a repeatable radiographic technique for assessment of cranial tibial subluxation (CTS) and test the intra-observer and inter-observer repeatability of the chosen landmarks. A secondary objective was to determine the effects of digital radiographic magnification on CTS measurement repeatability. METHODS Twenty-three normal canine pelvic limbs wer...

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