High Z elements in human sarcomata: assessment by multienergy CT and neutron activation analysis

Kan, W O; Al, Wiley; Gw, Wirtanen; Lange, TA; Moran, PR; Paliwal, Bhudatt; Cashwell, RJ

doi:10.2214/ajr.135.1.123

Cited by 8 publications

(4 citation statements)

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“…Only a few studies on this topic have been published. Significantly greater Zeff was measured in benign thyroid nodules than https://doi.org/10.3348/kjr.2019.0711 kjronline.org in papillary carcinomas (48), and higher Zeff was exhibited in soft-tissue sarcomas than in normal tissues (49). For lung tumors, a lower minimum Zeff and normalized mean Zeff statistically correlated with malignant lung tumors (47).…”

Section: Effective Atomic Number (Z Eff Map)mentioning

confidence: 99%

Application of Dual-Energy Spectral Computed Tomography to Thoracic Oncology Imaging

Kim

Park

et al. 2020

Korean J Radiol

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Computed tomography (CT) is an important imaging modality in evaluating thoracic malignancies. The clinical utility of dual-energy spectral computed tomography (DESCT) has recently been realized. DESCT allows for virtual monoenergetic or monochromatic imaging, virtual non-contrast or unenhanced imaging, iodine concentration measurement, and effective atomic number (Zeff map). The application of information gained using this technique in the field of thoracic oncology is important, and therefore many studies have been conducted to explore the use of DESCT in the evaluation and management of thoracic malignancies. Here we summarize and review recent DESCT studies on clinical applications related to thoracic oncology.

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Section: Effective Atomic Number (Z Eff Map)mentioning

confidence: 99%

Application of Dual-Energy Spectral Computed Tomography to Thoracic Oncology Imaging

Kim

Park

et al. 2020

Korean J Radiol

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“…e concept of dual-energy CT was primarily nominated in 1973 [7,8] and reemerged in the field of clinical radiology with the current technical advances in CT. Although the concept of dual-energy computed tomography (DECT) is almost as old as the CT technology itself, DECT initially required substantially higher radiation doses (nearly two times higher than that employed in singleenergy CT) and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate acquisitions [9,10]. In this regard, dual-energy CT introduced as a first generation dual-source CT system which can develop material variation by using two different X-ray energy spectra [7,11].…”

Section: Introductionmentioning

confidence: 99%

Image Quality and Dose Comparison of Single-Energy CT (SECT) and Dual-Energy CT (DECT)

Shayan

Oladghaffari

Sajjadian

et al. 2020

Radiology Research and Practice

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CT and its comprehensive usage have become one of the most indispensable components in medical field especially in the diagnosis of several diseases. SECT and DECT have developed CT diagnostic potentials in several means. In this review article we have discussed the basic principles of single-energy and dual-energy computed tomography and their important physical differences which can cause better diagnostic evaluation. Moreover, different organs diagnostic evaluations through single-energy and dual-energy computed tomography have been discussed. Conventional or single-energy CT (SECT) uses a single polychromatic X-ray beam (ranging from 70 to 140 kVp with a standard of 120 kVp) emitted from a single source and received by a single detector. The concept of dual-energy computed tomography (DECT) is almost as old as the CT technology itself; DECT initially required substantially higher radiation doses (nearly two times higher than those employed in single-energy CT) and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate acquisitions. The basic principles of single-energy and dual-energy computed tomography and their important physical differences can cause better diagnostic evaluation. Moreover, different organs diagnostic evaluations through single-energy and dual-energy computed tomography have been discussed. According to diverse data and statistics it is controversial to definitely indicate the accurate comparison of image quality and dose amount.

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“…Although the concept of dual-energy computed tomography (DECT) is almost as old as the CT technology itself, DECT initially required substantially higher radiation doses (nearly two times higher than that employed in single-energy CT) and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate acquisitions ( 1 ) . In the 1990s, there was renewed interest in DECT for the characterization of solitary pulmonary nodules, several studies highlighting the value of DECT over single-energy CT techniques ( 2 ) .…”

Section: Introductionmentioning

confidence: 99%

Radiation dose reduction in chest dual-energy computed tomography: effect on image quality and diagnostic information

et al. 2018

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ObjectiveTo determine whether dual-energy computed tomography (DECT) of the chest can be performed at a reduced radiation dose, with an emphasis on images generated with post-processing techniques.Materials and MethodsIn 21 patients undergoing DECT of the chest in a dual-source scanner, an additional image series was acquired at a reduced radiation dose. Four thoracic radiologists assessed both image series for image quality, normal thoracic structures, as well as pulmonary and mediastinal abnormalities, on virtual monochromatic images at 40 keV and 60 keV. Data were analyzed with Student's t-test, kappa statistics, analysis of variance, and the Wilcoxon signed-rank test.ResultsThe overall image quality of 60 keV virtual monochromatic images at a reduced radiation dose was considered optimal in all patients, and no abnormalities were missed. Contrast enhancement and lesion detection performance were comparable between reduced-dose images at 40 keV and standard-of-care images at 60 keV. The intraobserver and interobserver agreement were both good. The mean volumetric CT dose index (CTDIvol), size-specific dose estimate (SSDE), dose-length product (DLP), and effective dose (ED) for reduced-dose DECT were 3.0 ± 0.6 mGy, 4.0 ± 0.6 mGy, 107 ± 30 mGy.cm, and 1.5 ± 0.4 mSv, respectively.ConclusionDECT of the chest can be performed at a reduced radiation dose (CTDIvol < 3 mGy) without loss of diagnostic information.

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High Z elements in human sarcomata: assessment by multienergy CT and neutron activation analysis

Cited by 8 publications

References 0 publications

Application of Dual-Energy Spectral Computed Tomography to Thoracic Oncology Imaging

Application of Dual-Energy Spectral Computed Tomography to Thoracic Oncology Imaging

Image Quality and Dose Comparison of Single-Energy CT (SECT) and Dual-Energy CT (DECT)

Radiation dose reduction in chest dual-energy computed tomography: effect on image quality and diagnostic information

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