Assessment of image quality and low-contrast detectability in abdominal CT of obese patients: comparison of a novel integrated circuit with a conventional discrete circuit detector at different tube voltages.
Objectives: To compare image quality and low-contrast detectability of an integrated circuit (IC) detector in abdominal CT of obese patients with conventional detector technology at low tube voltages.Methods: A liver phantom with 45 lesions was placed in a water container to mimic an obese patient a...
| Publicado en: | European Radiology Vol. 25; no. 3; pp. 687 - 694 |
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| Autores principales: | , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Mar2015
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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=110136755&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 110136755 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Mar2015 vid: 25 iid: 3 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 110136755 NLM25316058 2012906464 10.1007/s00330-014-3459-4 NLM25316058 110136755 ppf: 687 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Assessment of image quality and low-contrast detectability in abdominal CT of obese patients: comparison of a novel integrated circuit with a conventional discrete circuit detector at different tube voltages. aug: au: Euler, A Heye, T Kekelidze, M Bongartz, G Szucs-Farkas, Z Sommer, C Schmidt, B Schindera, Sebastian T affil: Clinic of Radiology and Nuclear Medicine, University of Basel Hospital, Petersgraben 4, 4031, Basel, Switzerland. sug: subj: Liver Neoplasms Radiography Obesity Radiography Phantoms, Imaging Tomography, X-Ray Computed Methods Aged Electricity Female Human Male Middle Age Models, Anatomic Radiation Dosage Radiographic Image Interpretation, Computer-Assisted Methods Sensitivity and Specificity Aged: 65+ years Middle Aged: 45-64 years Female Male ab: Objectives: To compare image quality and low-contrast detectability of an integrated circuit (IC) detector in abdominal CT of obese patients with conventional detector technology at low tube voltages.Methods: A liver phantom with 45 lesions was placed in a water container to mimic an obese patient and examined on two different CT systems at 80, 100 and 120 kVp. The systems were equipped with either the IC or conventional detector. Image noise was measured, and the contrast-to-noise-ratio (CNR) was calculated. Low-contrast detectability was assessed independently by three radiologists. Radiation dose was estimated by the volume CT dose index (CTDIvol).Results: The image noise was significantly lower, and the CNR was significantly higher with the IC detector at 80, 100 and 120 kVp, respectively (P = 0.023). The IC detector resulted in an increased lesion detection rate at 80 kVp (38.1 % vs. 17.2 %) and 100 kVp (57.0 % vs. 41.0 %). There was no difference in the detection rate between the IC detector at 100 kVp and the conventional detector at 120 kVp (57.0 % vs. 62.2 %). The CTDIvol at 80, 100 and 120 kVp measured 4.5-5.2, 7.3-7.9 and 9.8-10.2 mGy, respectively.Conclusions: The IC detector at 100 kVp resulted in similar low-contrast detectability compared to the conventional detector with a 120-kVp protocol at a radiation dose reduction of 37 %. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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