WS/T 391-2024 English PDF

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WS/T 391-2024: Computer tomography examination procedure
Status: Valid

WS/T 391: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
WS/T 391-2024	679	Add to Cart	5 days	Computer tomography examination procedure	Valid
WS/T 391-2012	1279	Add to Cart	6 days	Computer tomography examination procedure	Obsolete

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GB/T 36388   WS/T 367   GB 18469   WS/T 389   WS 400   WS 399   

Basic data

Standard ID: WS/T 391-2024 (WS/T391-2024)
Description (Translated English): Computer tomography examination procedure
Sector / Industry: Health Industry Standard (Recommended)
Classification of Chinese Standard: C05
Classification of International Standard: 11.020
Word Count Estimation: 34,377
Date of Issue: 2024-07-23
Date of Implementation: 2025-01-01
Older Standard (superseded by this standard): WS/T 391-2012
Issuing agency(ies): National Health Commission
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WS/T 391-2012: Computer tomography examination procedure

---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.
Computer tomography examination procedure ICS 11.020 C05 People's Republic of China health industry standards CT inspection procedures 2012-09-03 released 2013-02-01 implementation Ministry of Health of People's Republic of China released Directory Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 CT radiation protection 2 5 CT examination technology 2 5.1 brain examination 2 5.2 head and neck examination 3 5.3 chest 10 5.4 Abdomen 12 5.5 Bone and joint system 19 Appendix A (Normative) Brain perfusion examination 25 Appendix B (Normative) Chest low-dose CT examination 27 References 29

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the Ministry of Health Medical Services Standards Committee. This standard was drafted. First Affiliated Hospital of China Medical University, Ministry of Health Hospital Management Institute, Guangdong Provincial People's Hospital, Capital Medical Beijing Tongren Hospital Affiliated to the University, Affiliated Hospital of Qingdao University Medical College, Changzheng Hospital of the Second Military Medical University, Beijing Capital Medical University Affiliated Day Altar hospital The main drafters of this standard. Tsui Hark, Liang Changhong, Yu Zonghe, Wang Zhen Chang, Xu Wenjian, Liu Shiyuan, Gao Peiyi, Chen Haisong, Ren Ke, Fan Guoguang, Zhang Lina, Wang Qiang, Li Songbai, Li Shu, Gao Zhenlong, Sun Wenge. CT inspection procedures

1 Scope

This standard specifies the preparation before CT examination, technical methods, procedures and video display requirements. This standard applies to all levels of medical institutions at all levels of medical personnel on the subject for CT examination.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GBZ 179 Radiological protection of medical exposure to the basic requirements

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Window width windowwidth Human tissue CT range of.2000 indexing, but the human eye can only be resolved generally 16 grayscale. Window width refers to the image of 16 gray-scale Including the range of CT values within the range of CT values are shown in different analog grayscale, CT values ?? were higher than this range of organizations were significantly Is shown as white, and tissues with CT values below this range are displayed in black. 3.2 Windowlevel Window center The center of the window, the general should choose to observe the CT value of the organization as the center. The level of the window will affect the brightness of the image and improve the window level The image is black and the window is whitened. 3.3 Artifact artifact In the process of scanning or information processing, due to one or more reasons the human body does not exist and the image shows Various types of images come from, including motion artifacts, high-density artifacts and machine fault artifacts. Artifacts affect image quality, sweep Should be identified when the description of the cause, try to avoid, diagnosis should be noted and lesion phase identification. 3.4 Partial volume effect partialvolumeeffect When two or more substances with different densities are contained in the same scanning plane, the measured CT values are the average values of them and they can not be accurately reflected In any kind of material CT value, this phenomenon is called partial volume effect. In the CT scan, where less than the thickness of the lesion, the CT value by Thickness of the other tissues within the influence of the measured CT value can not represent the true CT value of the lesion. as in the high-density tissue smaller low-density Lesions, the CT value is high; the other hand, in the low-density tissue of smaller high-density lesions, the CT value is low. 3.5 Flat plainscan Normal or non-contrast scan with non-contrast scan No contrast enhancement or contrast scan. Scanning orientation and more use of cross-sectional surface, head and face examination of head and face lesions can sometimes be used ......

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