Low-tube-voltage (80 kVp) CT aortography using 320-row volume CT with adaptive iterative reconstruction: lower contrast medium and radiation dose.
Objectives: To evaluate CT aortography at reduced tube voltage and contrast medium dose while maintaining image quality through iterative reconstruction (IR).Methods: The Institutional Review Board approved a prospective study of 48 patients who underwent follow-up CT aortography. We performed intra...
| Publicado en: | European Radiology Vol. 24; no. 2; pp. 460 - 469 |
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| Autores principales: | , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Feb2014
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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=104003745&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104003745 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Feb2014 vid: 24 iid: 2 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104003745 104003745 NLM24081645 2012446277 10.1007/s00330-013-3027-3 NLM24081645 104003745 ppf: 460 ppct: 9 formats: fmt: @attributes: type: P tig: atl: Low-tube-voltage (80 kVp) CT aortography using 320-row volume CT with adaptive iterative reconstruction: lower contrast medium and radiation dose. aug: au: Chen, Chien-Ming Chu, Sung-Yu Hsu, Ming-Yi Liao, Ying-Lan Tsai, Hui-Yu affil: Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital Linkou, College of Medicine, Chang Gung University, Taoyuan, Taiwan. sug: subj: Angiography Methods Tomography, X-Ray Computed Methods Contrast Media Diagnostic Use Radiographic Image Interpretation, Computer-Assisted Methods Adult Aged Contrast Media Administration and Dosage Dose-Response Relationship, Drug Female Prospective Studies Human Male Middle Age Pilot Studies Radiation Dosage Adult: 19-44 years Aged: 65+ years Middle Aged: 45-64 years Female Male ab: Objectives: To evaluate CT aortography at reduced tube voltage and contrast medium dose while maintaining image quality through iterative reconstruction (IR).Methods: The Institutional Review Board approved a prospective study of 48 patients who underwent follow-up CT aortography. We performed intra-individual comparisons of arterial phase images using 120 kVp (standard tube voltage) and 80 kVp (low tube voltage). Low-tube-voltage imaging was performed on a 320-detector CT with IR following injection of 40 ml of contrast medium. We assessed aortic attenuation, aortic attenuation gradient, image noise, contrast-to-noise ratio (CNR), volume CT dose index (CTDIvol), and figure of merit (FOM) of image noise and CNR. Two readers assessed images for diagnostic quality, image noise, and artefacts.Results: The low-tube-voltage protocol showed 23-31% higher mean aortic attenuation and image noise (both P < 0.01) than the standard-tube-voltage protocol, but no significant difference in the CNR and aortic attenuation gradients. The low-tube-voltage protocol showed a 48% reduction in CTDIvol and an 80% increase in FOM of CNR. Subjective diagnostic quality was similar for both protocols, but low-tube-voltage images showed greater image noise (P = 0.01).Conclusions: Application of IR to an 80-kVp CT aortography protocol allows radiation dose and contrast medium reduction without affecting image quality.Key Points: • CT aortography at 80 kVp allows a significant reduction in radiation dose. • Addition of iterative reconstruction reduces image noise and improves image quality. • The injected contrast medium dose can be substantially reduced at 80 kVp. • Aortic enhancement is uniform despite a reduced volume of contrast medium. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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