YY/T 1766.1-2021 English PDFUS$169.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. YY/T 1766.1-2021: Image quality evaluation methods for computed tomography system - Part 1: Modulation transfer function evaluation Status: Valid
Basic dataStandard ID: YY/T 1766.1-2021 (YY/T1766.1-2021)Description (Translated English): Image quality evaluation methods for computed tomography system - Part 1: Modulation transfer function evaluation Sector / Industry: Medical Device & Pharmaceutical Industry Standard (Recommended) Classification of Chinese Standard: C43 Word Count Estimation: 9,949 Issuing agency(ies): State Drug Administration YY/T 1766.1-2021: Image quality evaluation methods for computed tomography system - Part 1: Modulation transfer function evaluation---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Image quality evaluation methods for computed tomography system - Part 1.Modulation transfer function evaluation ICS 11.040.50 C43 People's Republic of China Pharmaceutical Industry Standards X-ray computed tomography equipment image Quality evaluation method Part 1.Modulation transfer function evaluation Released on 2021-03-09 2022-04-01 implementation Issued by the National Medical Products Administration ForewordYY/T 1766 "X-ray computer tomography equipment image quality evaluation method" is divided into two parts. ---Part 1.Modulation transfer function evaluation; ---Part 2.Evaluation of low-contrast resolution. This part is part 1 of YY/T 1766. This section was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This part was proposed by the State Drug Administration. This part is organized by the National Medical Electrical Appliance Standardization Technical Committee Medical X-ray Equipment and Apparatus Sub-Technical Committee (SAC/TC10/SC1) Focus. Drafting organizations of this section. Liaoning Medical Device Inspection and Testing Institute, Shanghai United Imaging Medical Technology Co., Ltd., Philips Medical (Suzhou) Co., Ltd. Shenyang Branch, Shanghai Siemens Medical Equipment Co., Ltd., Hangwei General Electric Medical System Co., Ltd., Mingfeng Medical System Co., Ltd. Co., Ltd., Neusoft Medical System Co., Ltd., Canon Medical System Research and Development (Dalian) Co., Ltd., Shenzhen Anke High-tech Stock Co., Ltd. The main drafters of this section. Wang Jianjun, Sun Zhiyong, Zhou Pei, Liang Jian, Li Xiang, Tian Yi, Zhang Guoqing, Wei Dong, Wang Bin, Liang Tiecheng, Zhou Hongliang, Xu Dan, Liu Jingbo, Zhang Longda.IntroductionSpatial resolution, also known as high contrast resolution, is an important indicator of the image performance of CT scanning devices. Historically, the test of this indicator was mainly through the subjective test method of visually inspecting high-contrast line pairs or small holes. Subjective assessment methods are limited by The observation ability of the human eye cannot accurately describe CT performance. Therefore, the MTF-frequency domain curve objective evaluation program is used by major manufacturers to make progress. Perform CT evaluation. The test method of the existing standard (such as YY/T 0310) spatial resolution test item is described as. Use the MTF method to measure the spatial resolution However, there is no detailed and accurate description of the MTF test method at present. Allows different manufacturers in the industry to evaluate spatial resolution test items There are differences in current practices, and the spatial resolution test results obtained by various manufacturers are less comparable. Based on the above status, this section gives the test methods and evaluations of the spatial resolution of the CT scanning device, using the modulation transfer function. The price standard is proposed for the purpose. The implementation of this method standard will surely make the evaluation of spatial resolution in the CT industry unified and standardized. X-ray computed tomography equipment image Quality evaluation method Part 1.Modulation transfer function evaluation1 ScopeThis part of YY/T 1766 is applicable to whole body and special X-ray computed tomography equipment (hereinafter referred to as CT scanning device). This section specifies the modulation transfer function (MTF) evaluation method of the spatial resolution of X-ray CT scanning devices.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 10149-1988 Medical X-ray equipment terms and symbols3 Terms and definitionsThe following terms and definitions defined in GB/T 10149-1988 apply to this document. 3.1 Spatialresolution When the difference between the attenuation value of the object and the background is much larger than the noise, the computer tomography equipment can distinguish the difference of different objects in the displayed image. ability. Note 1.Usually the difference of the attenuation coefficient between the object and the background causes the difference of hundreds of HU units in the corresponding CT value to be considered as large enough. Note 2.High contrast resolution is another term for spatial resolution. [GB/T 19042.5-2006, definition 3.17] 3.2 Point spread function pointspread function; PSF In a specific plane or axis direction, the target pixel value distribution on the image formed by the imaging system for a sufficiently small target. 3.3 Modulation transfer function; MTF The modulus of the system's point spread function after Fourier transform. 3.4 Region of interest; ROI Part of the image of particular interest drawn on the image at a certain moment. [GB/T 19042.5-2006, definition 3.15] 3.5 CT operating conditions CTconditionsofoperation All optional parameters that dominate the operation of the CT scanning device. Note 1.Including, for example, the nominal body slice thickness, pitch coefficient, filtration, peak X-ray tube voltage, and X-ray tube current and loading time, or current time Between product. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of YY/T 1766.1-2021_English be delivered?Answer: Upon your order, we will start to translate YY/T 1766.1-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of YY/T 1766.1-2021_English with my colleagues?Answer: Yes. The purchased PDF of YY/T 1766.1-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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