31 Jul 2018 3 1.2.2.1 Dose measurement using SEDENTEXCT Dosimetry index The SEDENTEXCT image quality (IQ) phantom was manufactured by 

Fig. 2: SedentexCT-IQ phantom for image quality evaluation. Methods and materials Three dental hybrid CBCT commercially available were investigated, hereinafter referred to as Device 1 , …

Within the body of the cylinder are features for the following tests: Noise/Uniformity. a new emerging dental X-ray modality (SEDENTEXCT) image quality (IQ) phantom in CT, and to evaluate its validity. Methods: The SEDENTEXCT IQ phantom and Radia diagnostic software were employed. The phantom was scanned using one medical full-body CT and two dentomaxillofacial cone beam CTs. (SEDENTEXCT IQ), and the images were analyzed using ImageJ to calculate image quality parameters such as noise, uniformity, contrast to noise ratio (CNR), and spatial resolution.

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Archives. Categories. No categories; Meta. Log in; Entries feed; Comments feed; WordPress.org; About Us. MediScientific is a distributor of medical and scientific devices in the UK. We specialise in radiation quality assurance, medical simulators, anthropomorphic phantoms and clinical measurement, serving a wide SEDENTEX-CT IQ Phantom The SEDENTEXCT IQ phantom used was developed Yorkshire, United Kingdom) for CBCT quality assur-ance testing and was centered on a tripod in each CBCT machine tested in this protocol (Figure 1). The phantom is a polymethyl methacrylate (PMMA) cylinder with a 16 cm diameter. 8 The phantom can be filled with six rows The SedentexCT DI dose index phantom comprises a stack of PMMA plates forming a cylinder representing the adult head. Several types of detector system are catered for: Ionisation chambers; Thermoluminescent detectors (TLDs) Gafchromic film; Conforms to standards: EC No 172 : 2012 (PSF) insert in the SedentexCT IQ phantom (SedentexCT IQ, Leeds Test Objects Ltd., Boroughbridge, UK) was used to calculate the MTF. The PSF insert is made of a stainless steel wire (diameter: 0.25 mm) suspended in the air.

A protocol proposed by SEDENTEXCT, dose index 1 (DI1), was applied to dose measurements whole image of the SedentexCT IQ phantom (SedentexCT IQ, Leeds Test Objects Ltd., North Yorkshire, UK). To obtain images with different image qualities, 28 combina-tions of 4 different tube voltages and 7 different tube cur-rents were used for a SedentexCT IQ phantom and a real skull phantom (78, 80, 85, and 90 kVp; and 2, 3, 4, 5, 6, 7, and 8 mA). one for measuring the IQ and one to measure the dose to the patient.

Doc 190g SedentexCT IQ_specSheet.cdr Author: Gideon Caspi Created Date: 20191205165210Z

Even though these phantoms allow for measuring a broad range of IQ parameters and analysis of volume data is supported by commercial computer software (e.g., CT Au-toQA Lite, Iris QA, Frederick, MD, USA), they are not suited Methods: The SEDENTEXCT IQ phantom and Radia diagnostic software were employed. The phantom was scanned using one medical full-body CT and two dento-maxillo-facial cone beam CTs. The point spread function (PSF) insert in the SedentexCT IQ phantom (SedentexCT IQ, Leeds Test Objects Ltd., Boroughbridge, UK) was used to calculate the MTF. The PSF insert is made of a stainless steel wire (diameter: 0.25 mm) suspended in the air. Fig. 2: SedentexCT-IQ phantom for image quality evaluation. Methods and materials Three dental hybrid CBCT commercially available were investigated, hereinafter referred to as Device 1 , Device 2 and Device 3 .

The SedentexCT IQ phantom was used to investigate the relationship between contrast-to-noise ratio (CNR) and dose-area product. Subjective image quality 

The images obtained using a real skull phantom were evaluated for each diagnostic task by 6 oral and maxillofacial radiologists, and each setting was classified as acceptable or unacceptable based on those evaluations. SedentexCTIQ consists of a PMMA cylinder (160 mm diameter) with recesses to house test inserts (fig. 1). Within the body of the cylinder are features for the following tests: Noise/Uniformity. a new emerging dental X-ray modality (SEDENTEXCT) image quality (IQ) phantom in CT, and to evaluate its validity. Methods: The SEDENTEXCT IQ phantom and Radia diagnostic software were employed. The phantom was scanned using one medical full-body CT and two dentomaxillofacial cone beam CTs. (SEDENTEXCT IQ), and the images were analyzed using ImageJ to calculate image quality parameters such as noise, uniformity, contrast to noise ratio (CNR), and spatial resolution.

Several types of detector system are catered for: Ionisation chambers; Thermoluminescent detectors (TLDs) Gafchromic film; Conforms to standards: EC No 172 : 2012 IQ was assessed by scanning a SEDENTEXCT IQ phantom, and images were analyzed in ImageJ. Dose index 1 was obtained using a thimble ionization chamber and SEDENTEXCT DI phantom. a SedentexCT IQ phantom according to diagnostic tasks. Measurement of physical image quality can serve as a foothold for future studies on the quality control of various cone bean computed tomography The SedentexCT IQ phantom (Leeds Test Objects Ltd, Borough-bridge, UK) was used to investigate the relationship between contrast-to-noise ratio (CNR) and dose–area product (DAP). Subjective image quality assessment was achieved using a small adult skull phantom (RANDO®; The Phantom Laboratory, Salem, NY) for the same range of exposure settings. METHODS:The SEDENTEXCT IQ phantom and Radia diagnostic software were employed.
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Dose index 1 was obtained using a thimble ionization chamber and SEDENTEXCT DI phantom. Mean gray values agreed 2017-03-07 · A SEDENTEXCT IQ phantom is frequently employed for evaluating CBCT characteristics 4 in scientific studies and contains the various insert modules for analysing spatial resolution, contrast resolution, pixel intensity and beam hardening artefacts .

1). Within the body of the cylinder are features for the following tests; Noise/Uniformity The lower section of the phantom is uniform PMMA (density 1.20 +/- 1.00%) Geometric Distortion A PMMA cylinder (160 mm diameter) with recesses to house test inserts. Within the body of the cylinder are features for the following tests; Noise/Uniformity – The lower section of the phantom is uniform PMMA (density 1.20 +/- 1.00%) Geometric Distortion – An array of 2.0 mm diameter, 3.0 mm deep Air gaps are uniformally pitched through one slice of the cylinder Test Inserts are included The images obtained using a SedentexCT IQ phantom were analyzed technically, and the physical factors of image noise, contrast resolution, spatial resolution, and metal artifacts were measured. The images obtained using a real skull phantom were evaluated for each diagnostic task by 6 oral and maxillofacial radiologists, and each setting was classified as acceptable or unacceptable based on those evaluations.
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SedentexCTIQ consists of a PMMA cylinder (160 mm diameter) with recesses to house test inserts (fig. 1). Within the body of the cylinder are features for the following tests: Noise/Uniformity.

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