Contrast-to-noise ratio with different large volumes in a cone-beam computerized tomography machine: An in vitro study

Boulos Bechara; C. Alex McMahan; William S. Moore; Marcel Noujeim; Hassem Geha

doi:10.1016/j.oooo.2012.08.436

Contrast-to-noise ratio with different large volumes in a cone-beam computerized tomography machine: An in vitro study

Boulos Bechara, C. Alex McMahan, William S. Moore, Marcel Noujeim, Hassem Geha

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Objectives: The objectives were to determine whether the images obtained from different cone-beam computerized tomography (CBCT) field of view (FOV) sizes with varying scan time and kilovolt peak using the Picasso Master 3D machine (Vatech, Hwasung, South Korea) differ in contrast-to-noise ratio (CNR). Study Design: A phantom was used. Scans were acquired using the same voxel size, 2 scan times (15 and 24 seconds) for 3 different FOV sizes and 5 different kilovolt peaks. The contrast and CNR were calculated for each FOV. Results: The CNRs were similar for the 2 scan times for all 3 FOV sizes. The CNR was lower in the 20 × 19 cm FOV compared with the other 2 FOVs for both scan times. Conclusions: The CNR does not vary significantly with increasing scan times for all FOV sizes. Smaller FOVs result in enhanced CNR and contrast.

Original language	English (US)
Pages (from-to)	658-665
Number of pages	8
Journal	Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Volume	114
Issue number	5
DOIs	https://doi.org/10.1016/j.oooo.2012.08.436
State	Published - Nov 1 2012

ASJC Scopus subject areas

Surgery
Oral Surgery
Pathology and Forensic Medicine
Dentistry (miscellaneous)
Radiology Nuclear Medicine and imaging

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title = "Contrast-to-noise ratio with different large volumes in a cone-beam computerized tomography machine: An in vitro study",

abstract = "Objectives: The objectives were to determine whether the images obtained from different cone-beam computerized tomography (CBCT) field of view (FOV) sizes with varying scan time and kilovolt peak using the Picasso Master 3D machine (Vatech, Hwasung, South Korea) differ in contrast-to-noise ratio (CNR). Study Design: A phantom was used. Scans were acquired using the same voxel size, 2 scan times (15 and 24 seconds) for 3 different FOV sizes and 5 different kilovolt peaks. The contrast and CNR were calculated for each FOV. Results: The CNRs were similar for the 2 scan times for all 3 FOV sizes. The CNR was lower in the 20 × 19 cm FOV compared with the other 2 FOVs for both scan times. Conclusions: The CNR does not vary significantly with increasing scan times for all FOV sizes. Smaller FOVs result in enhanced CNR and contrast.",

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AU - Bechara, Boulos

AU - McMahan, C. Alex

AU - Moore, William S.

AU - Noujeim, Marcel

AU - Geha, Hassem

PY - 2012/11/1

Y1 - 2012/11/1

N2 - Objectives: The objectives were to determine whether the images obtained from different cone-beam computerized tomography (CBCT) field of view (FOV) sizes with varying scan time and kilovolt peak using the Picasso Master 3D machine (Vatech, Hwasung, South Korea) differ in contrast-to-noise ratio (CNR). Study Design: A phantom was used. Scans were acquired using the same voxel size, 2 scan times (15 and 24 seconds) for 3 different FOV sizes and 5 different kilovolt peaks. The contrast and CNR were calculated for each FOV. Results: The CNRs were similar for the 2 scan times for all 3 FOV sizes. The CNR was lower in the 20 × 19 cm FOV compared with the other 2 FOVs for both scan times. Conclusions: The CNR does not vary significantly with increasing scan times for all FOV sizes. Smaller FOVs result in enhanced CNR and contrast.

AB - Objectives: The objectives were to determine whether the images obtained from different cone-beam computerized tomography (CBCT) field of view (FOV) sizes with varying scan time and kilovolt peak using the Picasso Master 3D machine (Vatech, Hwasung, South Korea) differ in contrast-to-noise ratio (CNR). Study Design: A phantom was used. Scans were acquired using the same voxel size, 2 scan times (15 and 24 seconds) for 3 different FOV sizes and 5 different kilovolt peaks. The contrast and CNR were calculated for each FOV. Results: The CNRs were similar for the 2 scan times for all 3 FOV sizes. The CNR was lower in the 20 × 19 cm FOV compared with the other 2 FOVs for both scan times. Conclusions: The CNR does not vary significantly with increasing scan times for all FOV sizes. Smaller FOVs result in enhanced CNR and contrast.

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Contrast-to-noise ratio with different large volumes in a cone-beam computerized tomography machine: An in vitro study

Abstract

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