![]() ![]() Crossref, Medline, Google ScholarĪrticle HistoryReceived Jrevision requested September 4 revision received December 24 accepted Janufinal version accepted January 20. An iterative approach to the beam hardening correction in cone beam CT. 16 Hsieh J, Molthen RC, Dawson CA, Johnson RH.A method for correcting bone induced artifacts in computed tomography scanners. Empirical cupping correction: a first-order raw data precorrection for cone-beam computed tomography. 14 Kachelriess M, Sourbelle K, Kalender WA. The mismatch created by this large variation in the attenuation coefficient causes CT scans of patients with metal implants to manifest streaking artefacts on.Computed tomography: beam hardening and environmental density artifact. Renal cyst pseudoenhancement: beam-hardening effects on CT numbers. 12 Maki DD, Birnbaum BA, Chakraborty DP, Jacobs JE, Carvalho BM, Herman GT.The environmental density artifact: a beam-hardening effect in computed tomography. Quantification of myocardial perfusion using dynamic 64-detector computed tomography. 10 George RT, Jerosch-Herold M, Silva C et al.CT reprojection polychromaticity correction for three attenuators. An inaccuracy in computed tomography: the energy dependence of CT values. Beam hardening in x-ray reconstructive tomography. Adenosine stress 64- and 256-row detector computed tomography angiography and perfusion imaging: a pilot study evaluating the transmural extent of perfusion abnormalities to predict atherosclerosis causing myocardial ischemia. 6 George RT, Arbab-Zadeh A, Miller JM et al.Myocardial perfusion imaging using adenosine triphosphate stress multi-slice spiral computed tomography: alternative to stress myocardial perfusion scintigraphy. 5 Kurata A, Mochizuki T, Koyama Y et al. A CT artefact caused by computer errors due to sudden changes in tissue density, from a relatively low density in brain tissue to a high density in bone.Multidetector computed tomography myocardial perfusion imaging during adenosine stress. 4 George RT, Silva C, Cordeiro MA et al. O-MAR helps to improve visualization of anatomy by reducing artifacts related to beam hardening, photon starvation and streaking caused by metal inside the.Cardiac functional analysis with multi-detector row CT and segmental reconstruction algorithm: comparison with echocardiography, SPECT, and MR imaging. 3 Yamamuro M, Tadamura E, Kubo S et al.Contrast-enhanced multidetector computed tomography viability imaging after myocardial infarction: characterization of myocyte death, microvascular obstruction, and chronic scar. 2 Lardo AC, Cordeiro MA, Silva C et al.Atrial fibrillation: multi-detector row CT of pulmonary vein anatomy prior to radiofrequency catheter ablation-initial experience. 1 Jongbloed MR, Dirksen MS, Bax JJ et al.Given the higher quality of the images produced by the NewTom VG x-ray machine, it is recommended for imaging of patients with extensive restorations, multiple prostheses or previous implant treatments.Īrtifacts beam hardening cone beam computed tomography. There were statistically significant differences in beam hardening artifacts in axial and coronal sections between the two x-ray machines (P<0.001), with a higher quality in the images produced by the NewTom VG. Mann-Whitney U test was used for two-by-two comparisons at a significance level of P<0.05. The number of artifacts in each image was determined using the scale provided. The corresponding sections (coronal and axial) of the implants were evaluated by two radiologists. Scanning procedures were carried out by two CBCT machines. The implants (Dentis) were placed in the canine, premolar and molar areas. McGraw-Hill Concise Dictionary of Modern Medicine. However, in clinical examinations, x-rays can cause a beam-hardening effect due to differences in the amount of x-ray transmitted through the human tissue therefore, the effective incident x-ray energy on the x-ray detector differs from the output x-ray energy 9, 10. In the present study, the number of artifacts as a result of beam hardening in the images of dental implants was compared between two NewTom VG and Planmeca Promax 3D Max CBCT machines.Īn implant drilling model was used in the present study. See Beam-hardening artefact, Edge artefact, Mosaic artefact, Ring artefact. These artifacts decrease the quality of images. The metallic materials used in dentistry can produce artifacts due to the beam hard-ening phenomenon. At present, cone beam computed tomography (CBCT) has become a substitute for computed tomography (CT) in dental procedures.
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