relationship between hounsfield unit in ct scan and gray scale in cbct
نویسندگان
چکیده
background and aims. cone-beam computed tomography (cbct) is an imaging system which has many advantages over computed tomography (ct). in ct scan, hounsfield unit (hu) is proportional to the degree of x-ray attenuation by the tissue. in cbct, the degree of x-ray attenuation is shown by gray scale (voxel value). the aim of the present study was to investigate the relationship between gray scale in cbct) and hounsfield unit (hu) in ct scan. materials and methods. in this descriptive study, the head of a sheep was scanned with 3 cbct and one medical ct scanner. gray scales and hus were detected on images. reconstructed data were analyzed to investigate relationship between cbct gray scales and hus. results. a strong correlation between gray scales of cbct and hus of ct scan was determined. conclusion. considering the fact that gray scale in cbct is the criteria in measurement of bone density before implant treatments, it is recommended because of the lower dose and cost compared to ct scan.
منابع مشابه
Relationship between Hounsfield Unit in CT Scan and Gray Scale in CBCT
Background and aims. Cone-beam computed tomography (CBCT) is an imaging system which has many advantages over computed tomography (CT). In CT scan, Hounsfield Unit (HU) is proportional to the degree of x-ray attenuation by the tissue. In CBCT, the degree of x-ray attenuation is shown by gray scale (voxel value). The aim of the present study was to investigate the relationship between gray scale...
متن کاملIn vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans
Background: Jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. Regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility.Objective: An in vitro investigation of correlation between average gray scale in direct digital radiographs and Hounsfield units in CT-Scan pro...
متن کاملEvaluation of the gray level in CBCT systems and its relationship with HU in CT Scanners
Introduction: Cone-beam CT (CBCT) is an imaging system which offers three-dimensional (3D), multiplanar images and has many advantages over computed tomography (CT) including shorter acquisition times for the resolution desired in dentistry, lower radiation dose to the patient, reasonable price and higher spatial resolution but CBCT scanners are unable to display actual Hounsf...
متن کاملin vitro evaluation of the relationship between gray scales in digital intraoral radiographs and hounsfield units in ct scans
background: jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility. objective: an in vitro investigation of correlation between average gray scale in direct digital radiographs and hounsfield units in ct-scan pr...
متن کاملIn vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans
BACKGROUND Jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. Regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility. OBJECTIVE An in vitro investigation of correlation between average gray scale in direct digital radiographs and Hounsfield units in CT-Scan pr...
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چکیده شخصیت به مجموعه عوامل روانی، عقلی، احساسی، و فیزیکی تشکیل دهنده یک فرد اطلاق میشود، خصوصا فرد ازدیدگاه دیگران ( مرجع). تدابیر یاد گیری سعی در اگاهی از اقدامات زبان اموزان موفق زبان دوم یا یک زبان بیگانه را دارد که توسط خود زبان اموزان گزارش میشود،یا حین یادگیری زبان دوم یا زبان بیگانه از انها قابل مشاهده است( روبین و وندن 1987). همچنین تدابیر ارتباطی به زبان اموزان کمک می کند تا بر مشکلا...
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عنوان ژورنال:
journal of dental research, dental clinics, dental prospectsجلد ۸، شماره ۲، صفحات ۱۰۷-۱۱۰
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