PMID- 27455500
OWN - NLM
STAT- MEDLINE
DCOM- 20170504
LR  - 20231112
IS  - 1526-9914 (Electronic)
IS  - 1526-9914 (Linking)
VI  - 17
IP  - 4
DP  - 2016 Jul 8
TI  - Electrocardiogram-gated coronary CT angiography dose estimates using ImPACT.
PG  - 342-356
LID - 10.1120/jacmp.v17i4.6218 [doi]
AB  - The primary study objective was to assess radiation doses using a modified form 
      of the Imaging Performance Assessment of Computed Tomography (CT) scanner 
      (ImPACT) patient dosimetry for cardiac applications on an Aquilion ONE ViSION 
      Edition scanner, including the Ca score, target computed tomography angiography 
      (CTA), prospective CTA, continuous CTA/cardiac function analysis (CFA), and 
      CTA/CFA modulation. Accordingly, we clarified the CT dose index (CTDI) to 
      determine the relationship between heart rate (HR) and X-ray exposure. As a 
      secondary objective, we compared radiation doses using modified ImPACT, a 
      whole-body dosimetry phantom study, and the k-factor method to verify the 
      validity of the dose results obtained with modified ImPACT. The effective dose 
      determined for the reference person (4.66 mSv at 60 beats per minute (bpm) and 
      33.43 mSv at 90bpm) were approximately 10% less than those determined for the 
      phantom study (5.28 mSv and 36.68 mSv). The effective doses according to the 
      k-factor (0.014 mSv*mGy-1*cm-1; 2.57 mSv and 17.10 mSv) were significantly lower 
      than those obtained with the other two methods. In the present study, we have 
      shown that ImPACT, when modified for cardiac applications, can assess both 
      absorbed and effective doses. The results of our dose comparison indicate that 
      modified ImPACT dose assessment is a promising and practical method for 
      evaluating coronary CTA.
CI  - (c) 2016 The Authors
FAU - Kobayashi, Masanao
AU  - Kobayashi M
AD  - Graduate School of Health Sciences, Fujita Health University, Toyoake, Japan. 
      masa1121@fujita-hu.ac.jp.
FAU - Asada, Yasuki
AU  - Asada Y
FAU - Matsubara, Kosuke
AU  - Matsubara K
FAU - Suzuki, Shouichi
AU  - Suzuki S
FAU - Koshida, Kichiro
AU  - Koshida K
FAU - Matsunaga, Yuta
AU  - Matsunaga Y
FAU - Haba, Tomonobu
AU  - Haba T
FAU - Kawaguchi, Ai
AU  - Kawaguchi A
FAU - Toyama, Hiroshi
AU  - Toyama H
FAU - Kato, Ryouichi
AU  - Kato R
LA  - eng
PT  - Journal Article
DEP - 20160708
PL  - United States
TA  - J Appl Clin Med Phys
JT  - Journal of applied clinical medical physics
JID - 101089176
SB  - IM
MH  - Cardiac-Gated Imaging Techniques/*methods
MH  - Coronary Angiography/*instrumentation
MH  - Electrocardiography/*instrumentation
MH  - Heart/*diagnostic imaging
MH  - Humans
MH  - *Phantoms, Imaging
MH  - Prospective Studies
MH  - Retrospective Studies
MH  - *Tomography Scanners, X-Ray Computed
MH  - Tomography, X-Ray Computed/*instrumentation
PMC - PMC5690042
EDAT- 2016/07/28 06:00
MHDA- 2017/05/05 06:00
PMCR- 2016/07/08
CRDT- 2016/07/26 06:00
PHST- 2015/11/11 00:00 [received]
PHST- 2016/02/23 00:00 [accepted]
PHST- 2016/02/23 00:00 [revised]
PHST- 2016/07/26 06:00 [entrez]
PHST- 2016/07/28 06:00 [pubmed]
PHST- 2017/05/05 06:00 [medline]
PHST- 2016/07/08 00:00 [pmc-release]
AID - ACM20342 [pii]
AID - 10.1120/jacmp.v17i4.6218 [doi]
PST - epublish
SO  - J Appl Clin Med Phys. 2016 Jul 8;17(4):342-356. doi: 10.1120/jacmp.v17i4.6218.