High-Pitch Spiral Computed Tomography

Lell, Michael; May, Matthias; Deak, Paul; Alibek, Sedat; Kuefner, Michael A.; Kuettner, Axel; Köhler, Henrik; Achenbach, Stephan; Uder, Michael; Radkow, Tanja

doi:10.1097/rli.0b013e3181f33b1d

Cited by 153 publications

(35 citation statements)

References 30 publications

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“…High resolution computerised tomography (HRCT) scans produce excellent resolution with substantially lower radiation exposures and scanning times short enough to avoid general anaesthesia. 84 Magnetic resonance imaging (MRI) can assess lung growth and development in utero , as well as extra utero without ionizing radiation. 85,86 Further development of both HRCT and MRI may allow pulmonary assessment early in life for birth cohort studies.…”

Section: Workgroup 4: Pulmonary Development (Group Membership: Table 1)mentioning

confidence: 99%

Birth cohorts in asthma and allergic diseases: Report of a NIAID/NHLBI/MeDALL joint workshop

Bousquet¹,

Gern²,

Martínez³

et al. 2014

Journal of Allergy and Clinical Immunology

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Population-based birth cohorts on asthma and allergies increasingly provide new insights into the development and natural history of the diseases. Over 130 birth cohorts focusing on asthma and allergy have been initiated in the last 30 years. A NIAID (National Institute of Allergy and Infectious Diseases), NHLBI (National Heart Lung and Blood Institute), MeDALL (Mechanisms of the Development of Allergy, Framework Programme 7 of the European Commission) joint workshop was held in Bethesda, MD, USA September 11–12, 2012 with 3 objectives (1) documenting the knowledge that asthma/allergy birth cohorts have provided, (2) identifying the knowledge gaps and inconsistencies and (3) developing strategies for moving forward, including potential new study designs and the harmonization of existing asthma birth cohort data. The meeting was organized around the presentations of 5 distinct workgroups: (1) clinical phenotypes, (2) risk factors, (3) immune development of asthma and allergy, (4) pulmonary development and (5) harmonization of existing birth cohorts. This manuscript presents the workgroup reports and provides web links (AsthmaBirthCohorts.niaid.nih.gov or www.medall-fp7.eu) where the reader will find tables describing the characteristics of the birth cohorts included in this report, type of data collected at differing ages, and a selected bibliography provided by the participating birth cohorts.

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Section: Workgroup 4: Pulmonary Development (Group Membership: Table 1)mentioning

confidence: 99%

Birth cohorts in asthma and allergic diseases: Report of a NIAID/NHLBI/MeDALL joint workshop

Bousquet¹,

Gern²,

Martínez³

et al. 2014

Journal of Allergy and Clinical Immunology

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“…Effective dose (ED) was subsequently calculated by using a standard conversion factor of 0.0051 mSv mGy −1 cm −1 , and as the DLP values provided by the scanner system were based on a 32-cm body phantom, the values were then multiplied by a correction factor of 2.4 to correct for a 16 cm phantom as proposed by Lell et al [18], [19].…”

Section: Methodsmentioning

confidence: 99%

Low-Dose High-Pitch CT Angiography of the Supraaortic Arteries Using Sinogram-Affirmed Iterative Reconstruction

et al. 2014

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ObjectiveTo prospectively evaluate image quality and radiation dose using a low-dose computed tomography angiography protocol and iterative image reconstruction for high-pitch dual-source CT-angiography (DSCTA) of the supraaortic arteries.Material and MethodsDSCTA was performed in 42 patients, using either 120 kVp tube voltage, 120 mAS tube current, 2.4 pitch and filtered back projection, or 100 kVp tube voltage, 100 mAs tube current, 3.2 pitch, and sinogram affirmed iterative reconstruction. Measurements of vessel attenuation, of the contrast-to-noise ratio (CNR) and the signal-to-noise ratio (SNR) were performed to objectively evaluate image quality. Two readers evaluated subjective image quality and image noise, using a four-point scale. Effective dose was used to compare the differences in radiation dose.ResultsLow-dose protocol application showed significantly higher vessel opacification (p = 0.013), and non-significantly higher CNR and SNR values. There was no difference in the subjective image quality and image noise reading between the protocols. Effective dose was significantly lower using the low-dose protocol (1.29±0.21 mSv vs. 2.92±0.72 mSv; p<0.001).ConclusionThe combined use of reduced tube voltage, reduced tube current, and iterative reconstruction reduces radiation dose by 55.4% in high-pitch DSCTA of the supraaortic arteries without impairment of image quality.

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“…Lell et al 29 and Hardie et al 30 have reported that using the highpitch mode can significantly reduce the dosage in CT scans. However, another group 31 stated that using the high-pitch mode (1.6 # pitch # 3.2) for CT scans has only a minor impact on radiation dose.…”

Section: Reasons Why Ct Was Chosenmentioning

confidence: 99%

“…However, a short acquisition time is doubtless a benefit of high-pitch scanning with a temporal resolution of 75 ms. One single scan phase can be performed in less than 1s (the average scanning time in our study was 0.46 s). This reduced scanning time renders sedation less important for infants, 29 and slight movements do not influence high-pitch CT image quality. One patient in the present study could not keep stationary during the CT scanning, but, by using the high-pitch mode, feeding arteries, draining veins and the extent of the lesion were clearly identified, and image quality was adequate for diagnosis and therapy planning ( Figure 1).…”

Section: Reasons Why Ct Was Chosenmentioning

confidence: 99%

High-pitch spiral CT with 3D reformation: an alternative choice for imaging vascular anomalies with affluent blood flow in the head and neck of infants and children

Wang

et al. 2015

BJR

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High-Pitch Spiral Computed Tomography

Abstract: high-pitch chest CT is a robust method to provide highest image quality making sedation or controlled ventilation for the examination of infants, small or uncooperative children unnecessary, whereas maintaining low radiation dose values.

Cited by 153 publications

References 30 publications

Birth cohorts in asthma and allergic diseases: Report of a NIAID/NHLBI/MeDALL joint workshop

Birth cohorts in asthma and allergic diseases: Report of a NIAID/NHLBI/MeDALL joint workshop

Low-Dose High-Pitch CT Angiography of the Supraaortic Arteries Using Sinogram-Affirmed Iterative Reconstruction

High-pitch spiral CT with 3D reformation: an alternative choice for imaging vascular anomalies with affluent blood flow in the head and neck of infants and children

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