- 関
- helical computed tomography、helical CT、spiral computed tomography
WordNet
- form a spiral; "The path spirals up the mountain"
- a continuously accelerating change in the economy
- a plane curve traced by a point circling about the center but at increasing distances from the center
- ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center (同)volute
- flying downward in a helical path with a large radius
- the 3rd letter of the Roman alphabet (同)c
- (music) the keynote of the scale of C major
- a general-purpose programing language closely associated with the UNIX operating system
PrepTutorEJDIC
- らせん(helix) / らせん状のもの;らせんばね;巻き貝 / (物価・賃金などの)らせん状上昇(下降) / らせん状の /… ‘を'らせん形にする / らせん形になる;らせん状に動く
- carbonの化学記号
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/04/30 13:39:10」(JST)
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| Diagnostics |
| MeSH |
D036542 |
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]
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Contents
- 1 SSCT and MSCT
- 2 Helical (or spiral) cone beam computed tomography
- 3 External links
- 4 References
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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
Further information: 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.
External links
- Interview with Kalender
- Principles of Computerized Tomographic Imaging
References
- ^ Avinash C. Kak and Malcolm Slaney (2001). Principles of Computerized Tomographic Imaging. Society for Industrial and Applied Mathematics ISBN 978-0-898714-94-4 / ISBN 0-89871-494-X.
- ^ Alan Conrad Bovik (2009). The essential guide to image processing. Academic Press. pp. 743–. ISBN 9780123744579. http://books.google.com/books?id=6TOUgytafmQC&pg=PA743. 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 9780857290267. http://books.google.com/books?id=XeMtD6lCDcsC&pg=PA31. Retrieved 4 June 2011.
- ^ MeSH Helical+Cone-Beam+CT
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Medical testing : Medical imaging · Radiology · (ICD-9-CM V3 87-88, ICD-10-PCS B, CPT 70010-79999)
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X-ray/
medical radiography/
Industrial radiography |
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2D
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Medical: Pneumoencephalography · Dental radiography · Sialography · Myelography · CXR (Bronchography) · AXR / KUB · DXA/DXR · Upper gastrointestinal series/Small bowel follow-through/Lower gastrointestinal series · Cholangiography/Cholecystography · Mammography · Pyelogram · Cystography · Arthrogram · Hysterosalpingography · Skeletal survey · Angiography (Angiocardiography, Aortography) · Venography · Lymphogram
Industrial: Radiographic testing
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3D / XCT
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Medical: CT pulmonary angiogram · Cardiac CT · Abdominal and pelvic CT (Virtual colonoscopy) · CT angiography · CT head · pQCT · Spiral computed tomography · High resolution CT · Whole body imaging (Full-body CT scan) · Electron beam tomography
Industrial: Industrial CT Scanning
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Other
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Fluoroscopy
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| MRI |
MRI of brain and brain stem · MR neurography · Cardiac MRI/Cardiac MRI perfusion · MR angiography · MR cholangiopancreatography · Breast MRI
Functional MRI · Diffusion MRI
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| Ultrasound |
Echocardiography / Doppler echocardiography (TTE · TEE) · Intravascular · Gynecologic · Obstetric · Echoencephalography · Transcranial doppler · Abdominal ultrasonography · Transrectal · Breast ultrasound · Transscrotal ultrasound · Carotid ultrasonography
Contrast-enhanced · 3D ultrasound · Endoscopic ultrasound · Emergency ultrasound (FAST) · Duplex
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| Radionuclide |
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2D / scintigraphy
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Cholescintigraphy · Scintimammography · Ventilation/perfusion scan · Radionuclide ventriculography · Radionuclide angiography · Radioisotope renography · Sestamibi parathyroid scintigraphy · Radioactive iodine uptake test · Bone scintigraphy · Immunoscintigraphy
full body: Octreotide scan · Gallium 67 scan · Indium 111 WBC scan
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3D / ECT
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SPECT (gamma ray): SPECT of brain, Myocardial perfusion imaging
PET (positron): Brain PET, Cardiac PET, PET mammography, PET-CT
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| Optical laser |
Optical tomography (Optical coherence tomography) · Confocal microscopy
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| Thermography |
Breast thermography
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Respiratory system surgeries and other procedures (ICD-9-CM V3 21-22, 30-34, ICD-10-PCS 0B)
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| Upper RT |
nose: Rhinoplasty · Septoplasty · Rhinectomy · Rhinomanometry
sinus: Sinusotomy
larynx: Laryngoscopy · Laryngectomy · Laryngotomy (Thyrotomy)
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| Lower RT |
trachea: Cricothyrotomy · Tracheoesophageal puncture · Tracheotomy
bronchus: Bronchoscopy
lung: Pneumonectomy · Lobectomy · Wedge resection · Lung transplantation · Decortication of lung · Heart-lung transplant
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Chest wall, pleura,
mediastinum, and diaphragm |
pleura/pleural cavity: Thoracentesis · Pleurodesis · Thoracoscopy · Thoracotomy · Chest tube
mediastinum: Mediastinoscopy
Nuss procedure
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| Medical imaging |
Bronchography · CT pulmonary angiogram · High resolution CT · Spiral CT · Ventilation/perfusion scan
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| CPRs |
Pneumonia severity index · CURB-65
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| Lung function test |
Body plethysmography · Spirometry · Bronchial challenge test · Capnography · Diffusion capacity
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| Cytology |
Sputum culture · Bronchoalveolar lavage
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Respiratory therapy/
intubation |
Mechanical ventilation · Positive pressure ventilation · Artificial respiration · Nebulizer · Hyperbaric medicine · Oxygen therapy · Decompression chamber · Heliox · Negative pressure ventilator · Postural drainage · CPR
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anat(n, x, l, c)/phys/devp
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noco(c, p)/cong/tumr, sysi/epon, injr
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UpToDate Contents
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English Journal
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- PMID 26988144
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- Circulation research.Circ Res.2016 Jun 24;119(1):55-68. doi: 10.1161/CIRCRESAHA.116.308304. Epub 2016 May 19.
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- Der Radiologe.Radiologe.2016 Jun 23. [Epub ahead of print]
- BACKGROUND: In hospitals, the radiological services provided to non-privately insured in-house patients are mostly distributed to requesting disciplines through internal cost allocation (ICA). In many institutions, computed tomography (CT) is the modality with the largest amount of allocation credit
- PMID 27338267
Japanese Journal
- DCS装置を用いたスパイラル型熱交換器の遠隔非線形温度制御 (制御研究会 安全制御・故障診断および制御一般)
- 高速二重螺旋スキャンにおけるCT-AECの応答特性評価 (「胸部領域」論文特集号)
- Performance of Low-dose CT Screening for Detecting Lung Cancer at the Early Stage and the Estimated Tumor Growth Rate According to the Smoking Status/Age
- , , , , , ,
- 肺癌 54(7), 937-946, 2014
- … To assess the utility of low-dose spiral chest CT (LDCT) screening for detecting lung cancer at the early stage and to examine the tumor volume doubling time (TVDT) according to the smoking status and age. … 2) The high rate of prevalence cancer, irrespective of the smoking status, with nearly 45% of patients having tumors >14 mm, stresses the importance of prevalence CT screening for both smokers and non-smokers. …
- NAID 130004880449
Related Links
- シングルスライスCTからマルチスライスCTへ スパイラルCTの登場により、CTの撮影技術は飛躍しましたが、それをさらに飛躍させたのが、マルチスライスCTです。それまでのCTでは、1回転で1スライスの断層画像の撮影しかできません ...
- Our study indicates male smokers with low levels of bilirubin are a high-risk group that can be targeted with smoking cessation help, low-dose spiral CT screening of their lungs and other preventive measures," said senior author Xifeng ...
★リンクテーブル★
[★]
ヘリカル断層撮影、ヘリカルコンピュータ断層撮影
- 関
- helical CT、spiral computed tomography、spiral CT
[★]
- 英
- spiral CT
- 関
- ヘリカルCT、ヘリカル断層撮影、スパイラル断層撮影、ヘリカルスキャンCT
[★]
- 英
- spiral computed tomography、spiral CT
- 関
- ヘリカルCT、スパイラルCT、ヘリカル断層撮影
[★]
スパイラル断層撮影
- 関
- helical computed tomography、helical CT、spiral CT
[★]
[★]
[★]
- 関
- helical、helices、helix