Characteristics of a newly developed dentomaxillofacial X-ray cone beam CT scanner (CB MercuRay™): system configuration and physical properties

Araki, Kazuo; Maki, Koutaro; Seki, Keisuke; Sakamaki, Kazuyuki Araki Kumi; Harata, Yasuo; Sakaino, Rie; Okano, T; Seo, K

doi:10.1259/dmfr/54013049

Cited by 168 publications

(129 citation statements)

References 15 publications

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“…A conventional CT scanner acquires sliced-image data with a fan-shaped X-ray beam and rows of detectors. Contiguous cross-sectional images are recon-clinically available 2,3,6,8) . The CBCT scanner can collect volume data by means of a single rotation taking between 9-40 sec due to the use of a cone-shaped X-ray beam and twodimensional detectors.…”

Section: Introductionmentioning

confidence: 99%

“…This means that CBCT scanners have the potential to offer additional benefits in hard-tissue visualization of the maxillofacial region and evaluation of skeletal morphology. Earlier studies 2,3,6,8) have shown that CBCT offers great advantages in comparison with conventional CT in depiction of the maxillofacial region, in terms of accuracy, scan time reduction, dose reduction, and convertible field of view (FOV), and so on. However, at the moment such systems also suffer from the disadvantages of being relatively expensive and unreliable in demonstrating soft tissue abnormalities.…”

Section: Introductionmentioning

confidence: 99%

“…One type, which includes the CB Throne ® , uses an X-ray image intensifier (I.I.) and a charge-coupled device (CCD) as a detector 2,3,6,8) . An X-ray beam is converted to an optical signal by CsI crystals, and then converted to photoelectrons.…”

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confidence: 99%

“…The other type uses a flat-panel detector (FPD) consisting of a scintillator screen and a Si-photo-sensor array 4) . Several systems have been developed and made commercially available 2,3,6,8) since the CBCT principle 4) was applied in a clinical setting. The CB Throne ® is the second CBCT unit, and follows the CB MercuRay ® , which was developed by Hitachi Medical Corporation 3,4) .…”

mentioning

confidence: 99%

“…Several systems have been developed and made commercially available 2,3,6,8) since the CBCT principle 4) was applied in a clinical setting. The CB Throne ® is the second CBCT unit, and follows the CB MercuRay ® , which was developed by Hitachi Medical Corporation 3,4) . The rotational arm of the CB Throne ® , which consists of an X-ray tube and a reciprocating detector, is located under the patient's chair so that the patient does not have the sensation of pressure that is generated by the around-the-head-type assembly.…”

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confidence: 99%

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Cone-beam CT (CB Throne) Applied to Dentomaxillofacial Region

Yajima

Otonari-Yamamoto

Sano

et al. 2006

Bull. Tokyo Dent. Coll.

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Cone-beam CT (CBCT) systems specifically designed for hard-tissue imaging of the maxillofacial region have recently become commercially available. The newly-developed CBCT system, CB Throne ® (Hitachi Medical Corp., Tokyo), is characterized by a number of features such as low dose, sub-millimeter spatial resolution, and a small footprint. This system has been clinically applied at Chiba Hospital, Tokyo Dental College, since April 2005. This article reports the characteristics of this system, and its diagnostic power for maxillofacial lesions and the pre-operative planning dental implants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Cone-beam CT (CB Throne) Applied to Dentomaxillofacial Region

Yajima

Otonari-Yamamoto

Sano

et al. 2006

Bull. Tokyo Dent. Coll.

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Functional and Technical Characteristics of Different Cone Beam Computed Tomography Units

Kharbanda

Wadhawan

Balachandran

et al. 2014

Cone Beam Computed Tomography in Orthodontics: Indications, Insights, and Innovations

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Cone‐beam CT dose and imaging performance evaluation with a modular, multipurpose phantom

et al. 2019

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Purpose A modular phantom for dosimetry and imaging performance evaluation in cone‐beam computed tomography (CBCT) is reported, providing a tool for quantitative technical assessment that can be adapted to a broad variety of CBCT imaging configurations and clinical applications. Methods The phantom presents a set of modules that can be ordered in various configurations suitable to a particular CBCT system. Modules include slabs containing a uniform medium, low‐contrast inserts, line‐spread features, and disk features suitable to measurement of image uniformity, noise, noise‐power spectrum (NPS), contrast, contrast‐to‐noise ratio (CNR), Hounsfield (HU) accuracy, linearity, spatial resolution modulation transfer function (MTF), and magnitude of cone‐beam artifact. Automated software recognizes the phantom configuration in DICOM images and provides structured reporting of such test measures. In any modular configuration, the phantom permits measurement of air kerma in central and peripheral locations with an air ionization chamber (e.g., Farmer chamber). The utility and adaptability of the phantom were demonstrated across a spectrum of CBCT systems, including scanners for orthopaedic imaging (Carestream OnSight 3D, Rochester NY), breast imaging (Doheny prototype, UC Davis), image‐guided surgery (IGS, Medtronic O‐arm, Littleton MA), angiography (Siemens Artis Zeego, Forcheim Germany), and image‐guided radiation therapy (IGRT, Elekta Synergy XVI, Stockholm Sweden). Results The phantom provided a consistent platform for quantitative assessment of dose and imaging performance compatible with a broad spectrum of CBCT systems. The purpose of the survey was not to obtain head‐to‐head performance comparison of systems designed for such distinct clinical applications. Rather, the survey demonstrated the suitability of the phantom to a broad spectrum of systems in a manner that provides characterization pertinent to disparate applications and imaging tasks. For example: the orthopaedic CBCT system (pertinent clinical tasks relating to high‐resolution bone imaging) was shown to achieve MTF consistent with imaging of high‐contrast trabecular bone structures (i.e., the MTF reduced to 10% at spatial frequency, f10 = 1.2 mm−1); the breast system (even higher‐resolution imaging of microcalcifications) exhibited f10 = 2.2 mm−1; the IGS system (tasks including both bone and soft‐tissue contrast resolution) provided f10 = 0.9 mm−1 and soft‐tissue CNR = 1.64; the angiography system (soft‐tissue body interventions) demonstrated CNR = 1.2 in soft tissues approximating liver lesions; and the IGRT system (pertinent tasks emphasizing HU linearity and image uniformity) showed linear response with HU values (R2 = 1), with a cupping artifact (tcup = 5.8%) due to x‐ray scatter. Conclusions The phantom provides an adaptable, quantitative basis for CBCT dosimetry and imaging performance evaluation suitable to a broad variety of CBCT systems. The dosimetry and image quality metrics are consistent with up‐to‐date methods for rigorous, quantitative,...

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Characteristics of a newly developed dentomaxillofacial X-ray cone beam CT scanner (CB MercuRay™): system configuration and physical properties

Abstract: This study shows that our newly developed cone beam CT system produces high resolution three-dimensional volumetric images that will be useful for the examination of dentomaxillofacial disorders.

Cited by 168 publications

References 15 publications

Cone-beam CT (CB Throne) Applied to Dentomaxillofacial Region

Cone-beam CT (CB Throne) Applied to Dentomaxillofacial Region

Functional and Technical Characteristics of Different Cone Beam Computed Tomography Units

Cone‐beam CT dose and imaging performance evaluation with a modular, multipurpose phantom

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