PMID- 32212830
OWN - NLM
STAT- MEDLINE
DCOM- 20201215
LR  - 20201215
IS  - 1600-0455 (Electronic)
IS  - 0284-1851 (Linking)
VI  - 61
IP  - 12
DP  - 2020 Dec
TI  - Peripheral bronchial luminal conspicuity on dynamic-ventilation computed 
      tomography: association with radiation doses and temporal resolution by using an 
      ex vivo porcine lung phantom.
PG  - 1608-1617
LID - 10.1177/0284185120911186 [doi]
AB  - BACKGROUND: It is still unclear which image reconstruction algorithm is 
      appropriate for peripheral bronchial luminal conspicuity (PBLC) on 
      dynamic-ventilation computed tomography (DVCT). PURPOSE: To assess the influence 
      of radiation doses and temporal resolution (TR) on the association between 
      movement velocity (MV) and PBLC on DVCT. MATERIAL AND METHODS: An ex vivo porcine 
      lung phantom with simulated respiratory movement was scanned by 320-row CT at 
      240 mA and 10 mA. Peak and dip CT density and luminal area adjusted by values at 
      end-inspiration (CTD(peak) and CTD(dip), luminal area ratio [LAR]) for PBLC and 
      MVs were measured and visual scores (VS) were obtained at 12 measurement points 
      on 13 frame images obtained at half and full reconstructions (TR 340 and 190 ms) 
      during expiration. Size-specific dose estimate (SSDE) was applied to presume 
      radiation dose. VS, CTD(peak), CTD(dip), LAR, and their cross-correlation 
      coefficients with MV (CCC) were compared among four methods with combinations of 
      two reconstruction algorithms and two doses. RESULTS: The dose at 10 mA was 
      presumed as 26 mA by SSDE for standard proportion adults. VS, CTD(dip), 
      CTD(peak), and LAR with half reconstruction at 10 mA (2.52 +/- 0.59, 1.016 +/- 0.221, 
      0.948 +/- 0.103, and 0.990 +/- 0.527) were similar to those at 240 mA except for VS, 
      and different from those with full reconstruction at both doses (2.24 +/- 0.85, 
      0.830 +/- 0.209, 0.986 +/- 0.065, and 1.012 +/- 0.438 at 240 mA) (P < 0.05). CCC for 
      CTD(dip) with half reconstruction (-0.024 +/- 0.552) at 10 mA was higher compared 
      with full reconstruction (-0.503 +/- 0.291) (P < 0.05). CONCLUSION: PBLC with half 
      reconstruction at 10 mA was comparable to that at 240 mA and better than those 
      with full reconstruction on DVCT.
FAU - Nagatani, Yukihiro
AU  - Nagatani Y
AUID- ORCID: 0000-0002-1110-963X
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Yoshigoe, Makoto
AU  - Yoshigoe M
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Tsukagoshi, Shinsuke
AU  - Tsukagoshi S
AD  - CT System Division, Canon Medical Systems, Otawara, Tochigi, Japan.
FAU - Ushio, Noritoshi
AU  - Ushio N
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Ohashi, Kohei
AU  - Ohashi K
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Nitta, Norihisa
AU  - Nitta N
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Kimoto, Tatsuya
AU  - Kimoto T
AD  - Center for Medical Research and Development, Canon Medical Systems, Otawara, 
      Tochigi, Japan.
FAU - Uranishi, Ayumi
AU  - Uranishi A
AD  - CT System Division, Canon Medical Systems, Otawara, Tochigi, Japan.
FAU - Sato, Shigetaka
AU  - Sato S
AUID- ORCID: 0000-0001-6460-0142
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Mayumi, Masayuki
AU  - Mayumi M
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Yamashiro, Tsuneo
AU  - Yamashiro T
AUID- ORCID: 0000-0002-1904-2548
AD  - Department of Radiology, Graduate School of Medical Science, University of the 
      Ryukyus, Nishihara, Okinawa, Japan.
FAU - Moriya, Hiroshi
AU  - Moriya H
AD  - Department of Radiology, Ohara General Hospital, Fukushima, Fukushima, Japan.
FAU - Murata, Kiyoshi
AU  - Murata K
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
FAU - Watanabe, Yoshiyuki
AU  - Watanabe Y
AD  - Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
CN  - investigators of ACTIve study group
LA  - eng
PT  - Journal Article
DEP - 20200325
PL  - England
TA  - Acta Radiol
JT  - Acta radiologica (Stockholm, Sweden : 1987)
JID - 8706123
SB  - IM
MH  - Algorithms
MH  - Animals
MH  - Bronchi/*diagnostic imaging
MH  - In Vitro Techniques
MH  - Lung/*diagnostic imaging
MH  - Phantoms, Imaging
MH  - Radiation Dosage
MH  - Radiographic Image Interpretation, Computer-Assisted
MH  - Respiration
MH  - Retrospective Studies
MH  - Swine
MH  - Tomography, X-Ray Computed/*methods
OTO - NOTNLM
OT  - Dynamic ventilation computed tomography
OT  - half reconstruction
OT  - iterative reconstruction
OT  - peripheral bronchial lumen
OT  - ultra-low-dose scanning
EDAT- 2020/03/28 06:00
MHDA- 2020/12/16 06:00
CRDT- 2020/03/28 06:00
PHST- 2020/03/28 06:00 [pubmed]
PHST- 2020/12/16 06:00 [medline]
PHST- 2020/03/28 06:00 [entrez]
AID - 10.1177/0284185120911186 [doi]
PST - ppublish
SO  - Acta Radiol. 2020 Dec;61(12):1608-1617. doi: 10.1177/0284185120911186. Epub 2020 
      Mar 25.