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Coronary vessel visualization using true 16-row multi-slice computed tomography technology

  • Axel Kuettner
  • Christof Burgstahler
  • Torsten Beck
  • Tanja Drosch
  • Andreas F. Kopp
  • Martin Heuschmid
  • Claus D. Claussen
  • Stephen Schroeder
Article

Abstract

Background :Multi-slice computed tomography (MSCT) scanners with retrospective ECG-gating permit visualization of the coronary arteries. Limited spatial and temporal resolution as well as breathing artefacts due to the scan time can cause poor distal vessel segment and side branch visualization. The latest MSCT generation with true 16-detector slices (Sensation 16 ®, Siemens, Forchheim, Germany) provides furthermore improved temporal and spatial resolution, as well as significantly reduced scan time. To assess, whether this technical improvement has also an impact on image quality we conducted the following study. Methods and material :Sixty-two consecutive patients (33 male, 29 female, mean age 63±8 [47–79] years, heart rate after β-blockade 63±7 [45–86] bpm) with suspicion of coronary artery disease (CAD) were examined by cardiac MSCT. Parameter settings were: 0.75mm collimation, 2.8mm table feed/rotation, caudocranial scan direction, 80cc contrast media biphasic injection protocol, gantry rotation time 375ms, temporal resolution 188ms). Thirteen coronary segments (sgts) were evaluated in each patient (total number: 806sgts). Image quality of each segment was determined as: excellent – free of motion artefacts, good – mild motion artefacts, relevant artefacts – still diagnostic value, severe calcification and insufficient image quality – not visualized segment. Results :301/806 (37%) sgts showed excellent and 294/806 (36%) sgts good image quality. Relevant artefacts were seen in 107/806 (13%) sgts, calcifications in 41/806 (5%) sgts. 63/806 (8%) sgts could not be visualized (34 of them (54%) either segment 9 or 10). Diagnostic image quality was achieved in 702/806 (87%) sgts. Conclusions :Due to true 16-slice technology and faster gantry rotation time MSCT image quality could be improved and allows a visualization of the entire coronary tree. Larger, randomized, catheter-controlled studies have to be conducted to determine, whether this improved visualization also translates into better diagnostic accuracy.

Keywords

coronary artery disease image quality imaging technique multi-slice computed tomography 16 row 

Abbreviations

bpm

beats per minute

CAD

coronary artery disease

mAs

milli ampere second

MIP

maximal intensity projection

MPR

multiplanar reformation

MSCT

multi-slice computed tomography

mSV

millisievert

p.o.

per os

pts

patients

sgts

segments

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Copyright information

© Springer 2005

Authors and Affiliations

  • Axel Kuettner
    • 1
  • Christof Burgstahler
    • 2
  • Torsten Beck
    • 2
  • Tanja Drosch
    • 1
  • Andreas F. Kopp
    • 1
  • Martin Heuschmid
    • 1
  • Claus D. Claussen
    • 1
  • Stephen Schroeder
    • 2
  1. 1.Department of Diagnostic RadiologyEberhard-Karls-UniversityTuebingenGermany
  2. 2.Department of Internal Medicine, Division of CardiologyEberhard-Karls-University TuebingenTuebingenGermany

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