Dose reduction and image quality improvement of chest radiography by using bone-suppression technique and low tube voltage: a phantom study.
Objective: To clarify the relationship between entrance surface dose (ESD) and physical image quality of original and bone-suppressed chest radiographs acquired using high and low tube voltages.Methods: An anthropomorphic chest phantom and a 12-mm diameter spherical simulated nodule with a CT value...
| Publicado en: | European Radiology Vol. 30; no. 1; pp. 571 - 581 |
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| Autores principales: | , , |
| Formato: | diagnostic images equations & formulas research tables/charts Journal Article |
| Publicado: |
Springer Nature
Jan2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=140064758&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 140064758 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Jan2020 vid: 30 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 140064758 140064758 NLM31385049 140064758 10.1007/s00330-019-06375-6 NLM31385049 140064758 ppf: 571 ppct: 10 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Dose reduction and image quality improvement of chest radiography by using bone-suppression technique and low tube voltage: a phantom study. aug: au: Takagi, Satoshi Yaegashi, Tatsuya Ishikawa, Masayori affil: Faculty of Health Sciences, Hokkaido University, Kita 12, Nishi 5, Kita-ku, 060-0812, Sapporo, Hokkaido, Japan sug: subj: Radiography, Thoracic Methods Radiographic Image Interpretation, Computer-Assisted Methods Tomography, X-Ray Computed Methods Radiation Dosage Quality Improvement Statistics and Numerical Data Phantoms, Imaging Artifacts Reproducibility of Results Human ab: Objective: To clarify the relationship between entrance surface dose (ESD) and physical image quality of original and bone-suppressed chest radiographs acquired using high and low tube voltages.Methods: An anthropomorphic chest phantom and a 12-mm diameter spherical simulated nodule with a CT value of approximately + 100 HU were used. The lung field in the chest radiograph was divided into seven areas, and the nodule was set in a total of 66 positions. A total of 264 chest radiographs were acquired using four ESD conditions: approximately 0.3 mGy at 140 and 70 kVp and approximately 0.2 and 0.1 mGy at 70 kVp. The radiographs were processed to produce bone-suppressed images. Differences in contrast and contrast-to-noise ratio (CNR) values of the nodule between each condition and between the original and bone-suppressed images were analyzed by a two-sided Wilcoxon signed-rank test.Results: In the areas not overlapping with the ribs, both contrast and CNR values were significantly increased with the bone-suppression technique (p < 0.01). In the bone-suppressed images, these values of the three conditions at 70 kVp were equal to or significantly higher than those of the condition at 140 kVp. There was no apparent decrease in these values between the ESD of approximately 0.3 and 0.1 mGy at 70 kVp.Conclusion: By using the shortest exposure time and the lowest tube voltage possible not to increase in blurring artifact and image noise, it is possible to improve the image quality of bone-suppressed images and reduce the patient dose.Key Points: • The effectiveness of bone-suppression techniques differs in areas of lung field. • Image quality of bone-suppressed chest radiographs is improved by lower tube voltage. • Applying lower tube voltage to bone-suppressed chest radiographs leads to dose reduction. pubtype: Academic Journal doctype: diagnostic images equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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