Comparison of physical quality assurance between Scanora 3D and 3D Accuitomo 80 dental CT scanners

被引:4
作者
Ali, Ahmed S. [1 ,2 ]
Fteita, Dareen [1 ]
Kulmala, Jarmo [1 ]
机构
[1] Univ Turku, Inst Biomed, Lab Biophys Cell Biol & Anat, Turku, Finland
[2] Benghazi Univ, Fac Dent, Dept Pediat Dent, Benghazi, Libya
关键词
CBCT; image quality; resolution; contrast; radiation dose; CONE-BEAM CT; COMPUTED-TOMOGRAPHY; IMAGE QUALITY; OPTIMIZATION; PERFORMANCE; PRINCIPLES; DOSIMETRY; MACHINE; ORGAN;
D O I
10.3402/ljm.v10.28038
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background: The use of cone beam computed tomography (CBCT) in dentistry has proven to be useful in the diagnosis and treatment planning of several oral and maxillofacial diseases. The quality of the resulting image is dictated by many factors related to the patient, unit, and operator. Materials and methods: In this work, two dental CBCT units, namely Scanora 3D and 3D Accuitomo 80, were assessed and compared in terms of quantitative effective dose delivered to specific locations in a dosimetry phantom. Resolution and contrast were evaluated in only 3D Accuitomo 80 using special quality assurance phantoms. Results: Scanora 3D, with less radiation time, showed less dosing values compared to 3D Accuitomo 80 (mean 0.33 mSv, SD +/- 0.16 vs. 0.18 mSv, SD +/- 0.1). Using paired t-test, no significant difference was found in Accuitomo two scan sessions (p > 0.05), while it was highly significant in Scanora (p > 0.05). The modulation transfer function value (at 2 lp/mm), in both measurements, was found to be 4.4%. The contrast assessment of 3D Accuitomo 80 in the two measurements showed few differences, for example, the grayscale values were the same (SD = 0) while the noise level was slightly different (SD = 0 and 0.67, respectively). Conclusions: The radiation dose values in these two CBCT units are significantly less than those encountered in systemic CT scans. However, the dose seems to be affected more by changing the field of view rather than the voltage or amperage. The low doses were at the expense of the image quality produced, which was still acceptable. Although the spatial resolution and contrast were inferior to the medical images produced in systemic CT units, the present results recommend adopting CBCTs in maxillofacial imaging because of low radiation dose and adequate image quality.
引用
收藏
页数:12
相关论文
共 30 条
  • [1] CEREBELLAR INFARCTION
    AOKI, N
    TOYOFUKU, T
    KOMIYA, K
    [J]. NEUROPEDIATRICS, 1986, 17 (03) : 124 - 128
  • [2] Development of a compact computed tomographic apparatus for dental use
    Arai, Y
    Tammisalo, E
    Iwai, K
    Hashimoto, K
    Shinoda, K
    [J]. DENTOMAXILLOFACIAL RADIOLOGY, 1999, 28 (04) : 245 - 248
  • [3] Characteristics of a newly developed dentomaxillofacial X-ray cone beam CT scanner (CB MercuRay™):: system configuration and physical properties
    Araki, K
    Maki, K
    Seki, K
    Sakamaki, K
    Harata, Y
    Sakaino, R
    Okano, T
    Seo, K
    [J]. DENTOMAXILLOFACIAL RADIOLOGY, 2004, 33 (01) : 51 - 59
  • [4] CHARACTERISTICS AND CONTROL OF CONTRAST IN CT
    BARNES, JE
    [J]. RADIOGRAPHICS, 1992, 12 (04) : 825 - 837
  • [5] Evaluation of a cone beam CT artefact reduction algorithm
    Bechara, B.
    McMahan, C. A.
    Geha, H.
    Noujeim, M.
    [J]. DENTOMAXILLOFACIAL RADIOLOGY, 2012, 41 (05) : 422 - 428
  • [6] The impact of computer display performance on the quality of digital radiographs: a review
    Butt, A.
    Mahoney, M.
    Savage, N. W.
    [J]. AUSTRALIAN DENTAL JOURNAL, 2012, 57 : 16 - 23
  • [7] Chan Mf, 2011, Biomed Imaging Interv J, V7, pe11, DOI 10.2349/biij.7.2.e11
  • [8] Cone beam CT in dental practice
    Dawood, A.
    Patel, S.
    Brown, J.
    [J]. BRITISH DENTAL JOURNAL, 2009, 207 (01) : 23 - 28
  • [9] A PRACTICAL METHOD TO MEASURE THE MTF OF CT SCANNERS
    DROEGE, RT
    MORIN, RL
    [J]. MEDICAL PHYSICS, 1982, 9 (05) : 758 - 759
  • [10] Dugal R, 2011, UNIVERS RES J DENT, V1, P30