Multidetector computed tomography for coronary stents imaging: High-voltage (140-KVP) prospective ecg-triggered versus standard-voltage (120-kvp) retrospective ecg-gated helical scanning

Antonio Esposito, Caterina Colantoni, Francesco De Cobelli, Antonella Del Vecchio, Anna Palmisano, Riccardo Calandrino, Alessandro Del Maschio

Research output: Contribution to journalArticlepeer-review

Abstract

OBJECTIVE: To compare prospective electrocardiogram (ECG)-triggered high-voltage coronary computed tomography (CT) angiography (CTA; 140-kVp P-cCTA) with retrospective ECG-gated standard-voltage cCTA (120-kVp R-cCTA), in patients with coronary stents. METHODS: Fifty-two patients with coronary stents were studied with 64-slice multidetector scanner. Ninety-three stents were analyzed: 55 with 140-kVp P-cCTA and 38 with 120-kVp R-cCTA. Image quality (IQ), diagnostic confidence (DC), in-stent assessable lumen, artificial narrowing, and effective radiation dose were compared between techniques. RESULTS: Image quality and DC were significantly better for the 140-kVp P-cCTA in comparison with the 120-kVp R-cCTA (IQ, 1.1 ± 0.36 vs 1.7 ± 0.60, respectively; P <0.00001. Diagnostic confidence: 1.1 ± 0.29 vs 1.5 ± 0.65 respectively; P <0.0001). In-stent assessable lumen and artificial narrowing were comparable between the techniques. Effective dose was lower for the 140-kVp P-cCTA (6.7 ± 2.07 mSv vs 15.8 ± 6.89 mSv; P <0.0001). CONCLUSIONS: High voltage combined with axial prospective ECG-triggered scan improved IQ and DC in stent cCTA imaging but failed to improve the diameter of in-stent assessable lumen and to reduce the artificial narrowing compared with the 120-kVp R-cCTA. Effective dose was 60% lower for the 140-kVp P-cCTA.

Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalJournal of Computer Assisted Tomography
Volume37
Issue number3
DOIs
Publication statusPublished - May 2013

Keywords

  • cardiac imaging
  • coronary arteries
  • coronary computed tomography angiography
  • multidetector computed tomography
  • stents

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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