PMID- 19412510
OWN - NLM
STAT- MEDLINE
DCOM- 20090804
LR  - 20211020
IS  - 2005-8330 (Electronic)
IS  - 1229-6929 (Print)
IS  - 1229-6929 (Linking)
VI  - 10
IP  - 3
DP  - 2009 May-Jun
TI  - The influence of reconstruction algorithm and heart rate on coronary artery image 
      quality and stenosis detection at 64-detector cardiac CT.
PG  - 227-34
LID - 10.3348/kjr.2009.10.3.227 [doi]
AB  - OBJECTIVE: We wanted to evaluate the impact of two reconstruction algorithms 
      (halfscan and multisector) on the image quality and the accuracy of measuring the 
      severity of coronary stenoses by using a pulsating cardiac phantom with different 
      heart rates (HRs). MATERIALS AND METHODS: Simulated coronary arteries with 
      different stenotic severities (25, 50, 75%) and different luminal diameters (3, 
      4, 5 mm) were scanned with a fixed pitch of 0.16 and a 0.35 second gantry 
      rotation time on a 64-slice multidetector CT. Both reconstruction algorithms 
      (halfscan and multisector) were applied to HRs of 40-120 beats per minute (bpm) 
      at 10 bpm intervals. Three experienced radiologists visually assessed the image 
      quality and they manually measured the stenotic severity. RESULTS: Fewer 
      measurement errors occurred with multisector reconstruction (p = 0.05), a slower 
      HR (p < 0.001) and a larger luminal diameter (p = 0.014); measurement errors were 
      not related with the observers or the stenotic severity. There was no significant 
      difference in measurements as for the reconstruction algorithms below an HR of 70 
      bpm. More nonassessable segments were visualized with halfscan reconstruction (p 
      = 0.004) and higher HRs (p < 0.001). Halfscan reconstruction had better quality 
      scores when the HR was below 60 bpm, while multisector reconstruction had better 
      quality scores when the HR was above 90 bpm. For the HRs between 60 and 90 bpm, 
      both reconstruction modes had similar quality scores. With excluding the 
      nonassessable segments, both reconstruction algorithms achieved a similar mean 
      measured stenotic severity and similar standard deviations. CONCLUSION: At a 
      higher HR (above 90 bpm), multisector reconstruction had better temporal 
      resolution, fewer nonassessable segments, better quality scores and better 
      accuracy of measuring the stenotic severity in this phantom study.
FAU - Wang, Yi-Ting
AU  - Wang YT
AD  - Department of Medical Imaging, National Taiwan University Hospital, Taipei, 
      Taiwan.
FAU - Yang, Chung-Yi
AU  - Yang CY
FAU - Hsiao, Jong-Kai
AU  - Hsiao JK
FAU - Liu, Hon-Man
AU  - Liu HM
FAU - Lee, Wen-Jen
AU  - Lee WJ
FAU - Shen, Yun
AU  - Shen Y
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
DEP - 20090422
PL  - Korea (South)
TA  - Korean J Radiol
JT  - Korean journal of radiology
JID - 100956096
SB  - IM
MH  - *Algorithms
MH  - Artifacts
MH  - Computer Simulation
MH  - Coronary Angiography/*methods
MH  - Coronary Stenosis/*diagnostic imaging
MH  - Electrocardiography
MH  - *Heart Rate
MH  - Image Processing, Computer-Assisted/*methods
MH  - Models, Cardiovascular
MH  - Observer Variation
MH  - Phantoms, Imaging
MH  - Reproducibility of Results
MH  - Severity of Illness Index
MH  - Tomography, Spiral Computed/*methods
PMC - PMC2672177
OTO - NOTNLM
OT  - Algorithm
OT  - Computed tomography (CT)
OT  - Coronary artery angiography
OT  - Phantom
OT  - Reconstruction
EDAT- 2009/05/05 09:00
MHDA- 2009/08/06 09:00
PMCR- 2009/05/01
CRDT- 2009/05/05 09:00
PHST- 2008/07/01 00:00 [received]
PHST- 2008/11/24 00:00 [accepted]
PHST- 2009/05/05 09:00 [entrez]
PHST- 2009/05/05 09:00 [pubmed]
PHST- 2009/08/06 09:00 [medline]
PHST- 2009/05/01 00:00 [pmc-release]
AID - 10.3348/kjr.2009.10.3.227 [doi]
PST - ppublish
SO  - Korean J Radiol. 2009 May-Jun;10(3):227-34. doi: 10.3348/kjr.2009.10.3.227. Epub 
      2009 Apr 22.