نتایج جستجو برای: radiographic magnification
تعداد نتایج: 34506 فیلتر نتایج به سال:
Single-image super-resolution technology has made great progress with the development of convolutional neural network, but most current methods do not attempt high-magnification image reconstruction; only reconstruction ×2, ×3, ×4 magnification is carried out for low-magnification down-sampled images without serious degradation. Based on this, this paper proposed a single-image method, which ex...
comparison of linear dimensions and angular measurements on panoramic images taken with two machines
background and aims. panoramic radiography is a method widely used because of low absorbed dose in patients (approximately 10 times less than that in the full mouth survey), reasonable cost and time. disadvantages of this radiography technique are magnification and distortion as a result of unequal magnification, which can influence dimensional and angular measurements used in clinical dentistr...
Femoral torsion has been implicated in the pathogenesis of patellar luxation and cranial cruciate ligament disease (CCLD). However, obtaining an objective and reproducible measurement of this conformation remains a challenge, thereby preventing accurate surgical correction. The purpose of this presentation is to review the traditional methods for assessing femoral torsion, discuss their limitat...
[15]. Our implementation on the MasPar allows rendering with changing viewpoints of five frames/second and two frames/sec-ond for higher quality trilinear reconstruction on 128x128x128 byte volumes. This improves on previous results [2][3] [9][10][12] because of the better filters used, and we discussed the filter differences. Straight forward extensions to our techniques include coher-ency ada...
This technique combines the advantages of magnification and stereoscopic angiography. A heavy-duty x-ray tube oscillating between two positions (25 mm apart) allows serial spinal angiograms to be produced in stereo magnification (factor 2.0) using the 0.2 mm, 12 kW focal spot. The x-ray tube can be rapidly changed for normal serial angiography with a 0.6 mm, 50 kW focus. The technique is easy t...
چکیده ندارد.
Preoperative templating is an important part of a THA. The ability to accurately determine magnification of the hip on the radiograph and apply identical magnification to the radiograph and template will improve accuracy of preoperative templating of THA. We designed a templating method using a new way of determining the hip magnification with a linear relationship between magnification of the ...
Calculation of the composite modulation transfer function ( MTF) of macroradiography in high magnification conducted with an X-ray tube having a very fine focal spot of 50 p. was performed with the purpose of obtaining the optimal magnification ratio. The optimal magnification ratio of a macroradiogram taken without the object of scatterer was 4-fold when a Fuji KX medical X-ray film combined w...
ABSTRACT The outcome of total hip arthroplasty (THA) in dogs is directly related to surgical planning. Templating radiographs prior THA should help the surgeon anticipate prosthesis size and femoral shape allowing canal fill proximal metaphysis by implant ensuring primary stable fixation. flare index (CFI) obtained from radiograph has been used as a measure risk complications for technique huma...
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