PMID- 32378125
OWN - NLM
STAT- MEDLINE
DCOM- 20210601
LR  - 20210601
IS  - 2662-4737 (Electronic)
IS  - 2662-4729 (Linking)
VI  - 43
IP  - 2
DP  - 2020 Jun
TI  - Effect of table height displacement and patient center deviation on size-specific 
      dose estimates calculated from computed tomography localizer radiographs.
PG  - 665-672
LID - 10.1007/s13246-020-00874-3 [doi]
AB  - The aim of this study is to evaluate the effect of table height displacement and 
      patient center deviation along the [Formula: see text]-axis on size-specific dose 
      estimate (SSDE) calculations based on computed tomography (CT) localizer 
      radiographs in pediatric and adult abdominal CT examinations. CT localizer 
      radiographs and CT axial images were acquired with table heights of - 5.0, - 2.5, 
      0.0 (center), 2.5, and 5.0 cm using two acrylic self-made phantoms filled with 
      water. Water-equivalent diameters ([Formula: see text]) were calculated from the 
      CT localizer radiographs and CT axial images. Relative errors of SSDEs from the 
      CT localizer radiographs to SSDEs from the CT axial images were calculated to 
      evaluate the effect of table height displacement. Furthermore, patient center 
      deviations and indices of SSDE overestimation were measured from the clinical 
      data of 110 abdominal CT examinations. The relative errors of SSDEs in phantoms 
      equivalent to 1-year-old and 20-year-old Japanese reference persons ranged 
      from - 2.45% (table height of 50 mm) to + 1.88% (- 50 mm) and from - 4.22% 
      (50 mm) to + 3.79% (- 50 mm), respectively. The largest center deviation in all 
      patients ranged from - 43.1 to 21.5 mm (median: - 14.4 mm). The indices of SSDE 
      overestimation for all patients ranged from - 16.2 to 6.9 mm (median: - 2.2 mm). 
      We found that the effects of table height displacement and patient center 
      deviation along the [Formula: see text]-axis on SSDEs calculated from CT 
      localizer radiographs in pediatric phantoms were smaller compared to adult 
      phantoms. In order to correct these patient center deviations, it is necessary to 
      apply an appropriate correction technique in each section along the [Formula: see 
      text]-axis.
FAU - Kuriyama, Kazuki
AU  - Kuriyama K
AUID- ORCID: 0000-0001-6045-3560
AD  - Department of Radiology, The Jikei University Kashiwa Hospital, 163-1 
      Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan. hjkl.a19@gmail.com.
AD  - Division of Health Sciences, Department of Quantum Medical Technology, Graduate 
      Course of Medical Science and Technology, Graduate School of Medical Science, 
      Kanazawa University, 5-11-80 Kodatsuno, Kanazawa-shi, Ishikawa, 920-0942, Japan. 
      hjkl.a19@gmail.com.
FAU - Matsubara, Kosuke
AU  - Matsubara K
AD  - Department of Quantum Medical Technology, Faculty of Health Sciences, Institute 
      of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 
      Kodatsuno, Kanazawa-shi, Ishikawa, 920-0942, Japan.
FAU - Hisahara, Shu
AU  - Hisahara S
AD  - Department of Radiology, The Jikei University Kashiwa Hospital, 163-1 
      Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan.
FAU - Nagata, Yukie
AU  - Nagata Y
AD  - Department of Radiology, The Jikei University Kashiwa Hospital, 163-1 
      Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan.
FAU - Nosaka, Rumiko
AU  - Nosaka R
AD  - Department of Radiology, The Jikei University Kashiwa Hospital, 163-1 
      Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan.
FAU - Goto, Rika
AU  - Goto R
AD  - Department of Radiology, The Jikei University Kashiwa Hospital, 163-1 
      Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan.
FAU - Yanano, Nobutaka
AU  - Yanano N
AD  - Department of Radiology, The Jikei University Kashiwa Hospital, 163-1 
      Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan.
FAU - Shimizu, Kanichiro
AU  - Shimizu K
AD  - Department of Radiology, The Jikei University School of Medicine, Kashiwa 
      Hospital, 163-1 Kashiwa-shita, Kashiwa-shi, Chiba, 277-8567, Japan.
FAU - Shoji, Tomokazu
AU  - Shoji T
AD  - Department of Radiology, The Jikei University Hospital, 3-19-18 Nishishinbashi, 
      Minato-ku, Tokyo, 105-8471, Japan.
LA  - eng
GR  - JP18K07746/Japan Society for the Promotion of Science/
PT  - Journal Article
DEP - 20200506
PL  - Switzerland
TA  - Phys Eng Sci Med
JT  - Physical and engineering sciences in medicine
JID - 101760671
SB  - IM
MH  - Humans
MH  - Infant
MH  - Phantoms, Imaging
MH  - *Radiation Dosage
MH  - *Tomography, X-Ray Computed
MH  - Young Adult
OTO - NOTNLM
OT  - Computed tomography
OT  - Localizer radiograph
OT  - Miscentering
OT  - Size-specific dose estimate
OT  - Table height
EDAT- 2020/05/08 06:00
MHDA- 2021/06/02 06:00
CRDT- 2020/05/08 06:00
PHST- 2020/02/20 00:00 [received]
PHST- 2020/04/22 00:00 [accepted]
PHST- 2020/05/08 06:00 [pubmed]
PHST- 2021/06/02 06:00 [medline]
PHST- 2020/05/08 06:00 [entrez]
AID - 10.1007/s13246-020-00874-3 [pii]
AID - 10.1007/s13246-020-00874-3 [doi]
PST - ppublish
SO  - Phys Eng Sci Med. 2020 Jun;43(2):665-672. doi: 10.1007/s13246-020-00874-3. Epub 
      2020 May 6.