PMID- 21799277
OWN - NLM
STAT- MEDLINE
DCOM- 20120201
LR  - 20190911
IS  - 1881-4883 (Electronic)
IS  - 0369-4305 (Linking)
VI  - 67
IP  - 7
DP  - 2011
TI  - [Relationship among RR interval, optimal reconstruction phase, temporal 
      resolution, and image quality of end-systolic reconstruction of coronary CT 
      angiography in patients with high heart rates: in search of the optimal 
      acquisition protocol].
PG  - 765-71
AB  - The purpose of this study is to elucidate the relationship among RR interval 
      (RR), the optimal reconstruction phase, and adequate temporal resolution (TR) to 
      obtain coronary CT angiography images of acceptable quality using 64-MDCT 
      (Aquilion 64) of end-systolic reconstruction in 407 patients with high heart 
      rates. Image quality was classified into 3 groups [rank A (excellent): 161, rank 
      B (acceptable): 207, and rank C (unacceptable): 39 patients]. The optimal 
      absolute phase (OAP) significantly correlated with RR [OAP (ms)=119-0.286RR (ms), 
      r=0.832, p<0.0001], and the optimal relative phase (ORP) also significantly 
      correlated with RR [ORP (%)=62-0.023RR (ms), r=0.656, p<0.0001], and the 
      correlation coefficient of OAP was significantly (p<0.0001) higher than that of 
      ORP. The OAP range (+/-2SD) in which it is highly possible to get a static image 
      was from [119-0.286RR (ms)-46] to [119-0.286RR (ms)+46]. The TR was significantly 
      different among ranks A (97 +/- 22 ms), B (111 +/- 31 ms) and C (135 +/- 34 ms). The TR 
      significantly correlated with RR in ranks A (TR=-16+0.149RR, r=0.767, p<0.0001), 
      B (TR=-15+0.166RR, r=0.646, p<0.0001), and C (TR=52+0.117RR, r=0.425, p=0.0069). 
      Rank C was distinguished from ranks A or B by linear discriminate analysis 
      (TR=-46+0.21RR), and the discriminate rate was 82.6%. In conclusion, both the OAP 
      and adequate TR depend on RR, and the OAP range (+/-2SD) can be calculated using 
      the formula [119-0.286RR (ms)-46] to [119-0.286RR (ms)+46], and an adequate TR 
      value would be less than (-46+0.21RR).
FAU - Sano, Tomonari
AU  - Sano T
AD  - Department of Radiological Technology, Takase Clinic.
FAU - Matsutani, Hideyuki
AU  - Matsutani H
FAU - Kondo, Takeshi
AU  - Kondo T
FAU - Fujimoto, Shinichiro
AU  - Fujimoto S
FAU - Sekine, Takako
AU  - Sekine T
FAU - Arai, Takehiro
AU  - Arai T
FAU - Morita, Hitomi
AU  - Morita H
FAU - Takase, Shinichi
AU  - Takase S
LA  - jpn
PT  - Journal Article
PL  - Japan
TA  - Nihon Hoshasen Gijutsu Gakkai Zasshi
JT  - Nihon Hoshasen Gijutsu Gakkai zasshi
JID - 7505722
SB  - IM
MH  - Aged
MH  - Coronary Angiography/*methods
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Tachycardia/*diagnostic imaging/physiopathology
MH  - Tomography, X-Ray Computed/*methods
EDAT- 2011/07/30 06:00
MHDA- 2012/02/02 06:00
CRDT- 2011/07/30 06:00
PHST- 2011/07/30 06:00 [entrez]
PHST- 2011/07/30 06:00 [pubmed]
PHST- 2012/02/02 06:00 [medline]
AID - JST.JSTAGE/jjrt/67.765 [pii]
AID - 10.6009/jjrt.67.765 [doi]
PST - ppublish
SO  - Nihon Hoshasen Gijutsu Gakkai Zasshi. 2011;67(7):765-71. doi: 
      10.6009/jjrt.67.765.