Efficacy of 'fine' focal spot imaging in CT abdominal angiography.
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| Title: | Efficacy of 'fine' focal spot imaging in CT abdominal angiography. |
|---|---|
| Authors: | Oh, Lawrence1 chia.wei.oh@gmail.com, Lau, Kenneth, Devapalasundaram, Ashwini1, Buchan, Kevin2, Ardley, Nicholas1, Huynh, Minh3 |
| Source: | European Radiology. Dec2014, Vol. 24 Issue 12, p3010-3016. 7p. |
| Subjects: | Abdominal radiography, Computed tomography, Angiography, Diagnostic imaging, Medical radiology |
| Abstract: | Objectives: To assess the efficacy of fine focal spot imaging in calcification beam-hardening artefact reduction and vessel clarity on CT abdominal angiography (CTAA). Methods: Adult patients of any age and gender who presented for CTAA were included. Thirty-nine patients were examined with a standard focal spot size (SFSS) of 1 × 1 mm in the first 3 months while 31 consecutive patients were examined with a fine focal spot size (FFSS) of 1 × 0.5 mm in the following 3 months. Vessel clarity and calcification beam-hardening artefacts of the abdominal aorta, celiac axis, superior mesenteric artery, inferior mesenteric artery, renal arteries, and iliac arteries were assessed using a 5-point grading scale by two blinded radiologists randomly. Results: Cohen's Kappa test indicated that on average, there was substantial agreement among reviewers for vessel wall clarity and calcification artefact grading. Mann-Whitney test showed that there was a significant difference between the two groups, with FFSS performing significantly better for vessel clarity ( U, 6481.50; p < 0.001; r, 0.73) and calcification artefact reduction ( U, 1916; p < 0.001; r, 0.77). Conclusion: Fine focus CT angiography produces images with better vessel wall clarity and less vessel calcification beam-hardening artefact. Key Points: • Focal spot size affects the spatial resolution of a CT system. • Fine focus CTAA produces images with improved vessel wall clarity. • Fine focus CTAA is associated with fewer calcification beam-hardening artefacts. • Fine focus CTAA may improve accuracy in assessment of luminal stenosis. [ABSTRACT FROM AUTHOR] |
| Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Efficacy of 'fine' focal spot imaging in CT abdominal angiography. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Oh%2C+Lawrence%22">Oh, Lawrence</searchLink><relatesTo>1</relatesTo><i> chia.wei.oh@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Lau%2C+Kenneth%22">Lau, Kenneth</searchLink><br /><searchLink fieldCode="AR" term="%22Devapalasundaram%2C+Ashwini%22">Devapalasundaram, Ashwini</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Buchan%2C+Kevin%22">Buchan, Kevin</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Ardley%2C+Nicholas%22">Ardley, Nicholas</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Huynh%2C+Minh%22">Huynh, Minh</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Radiology%22">European Radiology</searchLink>. Dec2014, Vol. 24 Issue 12, p3010-3016. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Abdominal+radiography%22">Abdominal radiography</searchLink><br /><searchLink fieldCode="DE" term="%22Computed+tomography%22">Computed tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Angiography%22">Angiography</searchLink><br /><searchLink fieldCode="DE" term="%22Diagnostic+imaging%22">Diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Medical+radiology%22">Medical radiology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Objectives: To assess the efficacy of fine focal spot imaging in calcification beam-hardening artefact reduction and vessel clarity on CT abdominal angiography (CTAA). Methods: Adult patients of any age and gender who presented for CTAA were included. Thirty-nine patients were examined with a standard focal spot size (SFSS) of 1 × 1 mm in the first 3 months while 31 consecutive patients were examined with a fine focal spot size (FFSS) of 1 × 0.5 mm in the following 3 months. Vessel clarity and calcification beam-hardening artefacts of the abdominal aorta, celiac axis, superior mesenteric artery, inferior mesenteric artery, renal arteries, and iliac arteries were assessed using a 5-point grading scale by two blinded radiologists randomly. Results: Cohen's Kappa test indicated that on average, there was substantial agreement among reviewers for vessel wall clarity and calcification artefact grading. Mann-Whitney test showed that there was a significant difference between the two groups, with FFSS performing significantly better for vessel clarity ( U, 6481.50; p < 0.001; r, 0.73) and calcification artefact reduction ( U, 1916; p < 0.001; r, 0.77). Conclusion: Fine focus CT angiography produces images with better vessel wall clarity and less vessel calcification beam-hardening artefact. Key Points: • Focal spot size affects the spatial resolution of a CT system. • Fine focus CTAA produces images with improved vessel wall clarity. • Fine focus CTAA is associated with fewer calcification beam-hardening artefacts. • Fine focus CTAA may improve accuracy in assessment of luminal stenosis. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00330-014-3368-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 3010 Subjects: – SubjectFull: Abdominal radiography Type: general – SubjectFull: Computed tomography Type: general – SubjectFull: Angiography Type: general – SubjectFull: Diagnostic imaging Type: general – SubjectFull: Medical radiology Type: general Titles: – TitleFull: Efficacy of 'fine' focal spot imaging in CT abdominal angiography. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Oh, Lawrence – PersonEntity: Name: NameFull: Lau, Kenneth – PersonEntity: Name: NameFull: Devapalasundaram, Ashwini – PersonEntity: Name: NameFull: Buchan, Kevin – PersonEntity: Name: NameFull: Ardley, Nicholas – PersonEntity: Name: NameFull: Huynh, Minh IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 09387994 Numbering: – Type: volume Value: 24 – Type: issue Value: 12 Titles: – TitleFull: European Radiology Type: main |
| ResultId | 1 |
