関: helical CT、spiral computed tomography、spiral CT

WordNet

X-ray machine in which a computer builds a detailed image of a particular plane through an object from multiple X-ray measurements

PrepTutorEJDIC

…'を'計算する,見積もる / 計算する,算定する
らせん形の

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/03/07 16:51:40」(JST)

wiki en

Spiral computed tomography is a computed tomography^[1] technology involving movement in a helical pattern for the purpose of increasing resolution. Most modern hospitals currently use spiral CT scanners.

CT beam types have included parallel beams, fan-beams, and cone-beams.^[2]

§SSCT and MSCT

Willi Kalender, who is credited with the invention prefers the term Spiral scan CT,^[3] arguing that spiral is synonymous with helical: for example as used in 'spiral staircase'.^[4]

Since its invention by Kalender in the 1980s, helical scan CT machines have steadily increased the number of rows of detectors (slices) they deploy. The prototype 16 multi-slice scanner was introduced in 2001 and in 2004, 64 multislice scanners are on the market. These can produce an image in less than a second and thus can obtain images of the heart and its blood vessels (coronary vessels) as if frozen in time.

The earliest devices, developed in 1989, were called "SSCT", for "single-slice spiral computed tomography". In 1998, "MSCT" or "multi-slice spiral computed tomography" was introduced.^[5]

§Helical (or spiral) cone beam computed tomography

In cone-beam computed tomography (commonly abbreviated CBCT), the x-ray beam is conical.^[6]

Helical (or spiral) cone beam computed tomography is a type of three-dimensional computed tomography (CT) in which the source (usually of x-rays) describes a helical trajectory relative to the object while a two-dimensional array of detectors measures the transmitted radiation on part of a cone of rays emanating from the source.

In practical helical cone beam x-ray CT machines, the source and array of detectors are mounted on a rotating gantry while the patient is moved axially at a uniform rate. Earlier x-ray CT scanners imaged one slice at a time by rotating source and one-dimensional array of detectors while the patient remained static. The helical scan method reduces the x-ray dose to the patient required for a given resolution while scanning more quickly. This is however at the cost of greater mathematical complexity in the reconstruction of the image from the measurements.

§References

^ Avinash C. Kak and Malcolm Slaney (2001). Principles of Computerized Tomographic Imaging. Society for Industrial and Applied Mathematics ISBN 978-0-89871-494-4 / ISBN 0-89871-494-X.
^ Alan Conrad Bovik (2009). The essential guide to image processing. Academic Press. pp. 743–. ISBN 978-0-12-374457-9. Retrieved 4 June 2011.
^ Kalender WA (1994). "Technical foundations of spiral CT" Semin Ultrasound CT MR 15: (2) 81-89.
^ Kalender WA (1994). "Spiral or helical CT: right or wrong?" Radiology 193: (2) 583.
^ Robert Cierniak (12 January 2011). X-Ray Computed Tomography in Biomedical Engineering. Springer. pp. 31–. ISBN 978-0-85729-026-7. Retrieved 4 June 2011.
^ Helical Cone-Beam CT at the US National Library of Medicine Medical Subject Headings (MeSH)

§External links

Interview with Kalender
Principles of Computerized Tomographic Imaging

UpToDate Contents

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English Journal

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Japanese Journal

石灰化病変の血管内腔評価における軌道同期ヘリカルスキャンを用いた下肢サブトラクションCT Angiographyの有用性

稲田智,舛田隆則,丸山尚也 [他]
日本放射線技術学会雑誌 69(10), 1119-1129, 2013-10
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東日本大震災で被災したコンクリート構造物の損傷度評価に関する研究

鈴木哲也,森井俊広,河合隆行,鈴木哲也,森井俊広,河合隆行
新潟大学農学部研究報告 65(2), 157-163, 2013-03
… Prior to the compression test, distribution of micro-cracks in a concrete-core sample is inspected by helical X-ray computed tomography (CT), which scans at one-millimeter intervals. …
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出生前診断に胎児CT検査が有用であった骨形成不全症の一例

田代英史,中島義之,和田真沙美 [他]
千葉県産科婦人科医学会雑誌 = Chiba journal of obstetrics and gynecology 6(2), 134-137, 2013
NAID 40019592458

「ヘリカル断層撮影」

Spiral computed tomography
	Diagnostics
MeSH	D036542

　　[★]

英: helical computed tomography、helical CT
関: ヘリカルCT、スパイラルCT、ヘリカルコンピュータ断層撮影、スパイラル断層撮影

「spiral CT」

　　[★]

スパイラル断層撮影、スパイラルCT

関: helical computed tomography、helical CT、spiral computed tomography

「spiral computed tomography」

　　[★]

スパイラル断層撮影

関: helical computed tomography、helical CT、spiral CT

「ヘリカルコンピュータ断層撮影」

　　[★]

英: helical computed tomography
関: ヘリカル断層撮影

「compute」

　　[★]

v.

計算する、算出する、コンピュータ処理する、コンピュータ化する

関: calculate、calculation、computation、computerization、computerize

「helical」

　　[★]

adj.

らせんの、らせん状の、ヘリカルな、ヘリックスの

関: helices、helix、spiral

「tomograph」

　　[★]

断層撮影、断層撮影機

関: tomographic、tomography

「computed tomography」

　　[★] コンピュータ断層撮影コンピュータ断層撮影法 CT

[1] Avinash C. Kak and Malcolm Slaney (2001). Principles of Computerized Tomographic Imaging. Society for Industrial and Applied Mathematics ISBN 978-0-89871-494-4 / ISBN 0-89871-494-X.

[Bovik2009-2] Alan Conrad Bovik (2009). The essential guide to image processing. Academic Press. pp. 743–. ISBN 978-0-12-374457-9. Retrieved 4 June 2011.

[3] Kalender WA (1994). "Technical foundations of spiral CT" Semin Ultrasound CT MR 15: (2) 81-89.

[4] Kalender WA (1994). "Spiral or helical CT: right or wrong?" Radiology 193: (2) 583.

[Cierniak2011-5] Robert Cierniak (12 January 2011). X-Ray Computed Tomography in Biomedical Engineering. Springer. pp. 31–. ISBN 978-0-85729-026-7. Retrieved 4 June 2011.

[6] Helical Cone-Beam CT at the US National Library of Medicine Medical Subject Headings (MeSH)

リンク元	「ヘリカル断層撮影」「spiral CT」「spiral computed tomography」「ヘリカルコンピュータ断層撮影」
関連記事	「compute」「helical」「tomograph」「computed tomography」

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案内

helical computed tomography