PMID- 36693277
OWN - NLM
STAT- MEDLINE
DCOM- 20230215
LR  - 20230320
IS  - 1361-6498 (Electronic)
IS  - 0952-4746 (Linking)
VI  - 43
IP  - 1
DP  - 2023 Feb 14
TI  - Development of size-specific dose estimates for common computed tomography 
      examinations: a study in Ghana.
LID - 10.1088/1361-6498/acb5aa [doi]
AB  - This study determined the size-specific dose estimate (SSDE) of computed 
      tomography (CT) examinations and derived mathematical expressions for dose output 
      estimation and optimization in a teaching hospital in Ghana. Demographic and 
      scanner output indices, including CT dose index (CTDI(vol)) and dose length 
      product for adult head, chest and abdominopelvic (ABP) CT examinations carried 
      out at the hospital from 2018 to 2020, were retrieved from the picture archiving 
      and communication system of the CT scanner machine. Other indices such as the 
      antero-posterior diameter (D(AP)), lateral diameter (D(L)) and diagonal diameter 
      (D(dia)) of the patients' bodies were measured on the mid-slice axial image using 
      a digital caliper. The effective diameter (D(eff)) was then calculated as the 
      square root of the product of theD(AP)andD(L). The SSDEs were calculated as the 
      product of the CTDI(vol)and the size-specific conversion factors obtained from 
      Report 204 of the American Association of Physicists in Medicine. Regression 
      analyses were performed to find the relationship between SSDE and the various 
      parameters to derive mathematical equations for the dose estimations. There were 
      more female samples (n= 468, 56.3%) than male samples (n= 364, 43.7%) for each CT 
      procedure. The SSDEs and size-specific diagnostic reference levels (SSDRLs) were: 
      head (83.9 mGy; 86.9 mGy), chest (8.1 mGy; 8.7 mGy) and ABP (8.4 mGy; 9.2 mGy). 
      The variations between CTDI(vol)and SSDEs for head (2.50%), chest (25.9%), and 
      ABP (26.2%) showed an underestimation of radiation dose to patients, especially 
      in chest and ABP examinations, if CTDI(vol)is used to report patient doses. The 
      SSDEs of the chest and ABP CT examinations showed linear correlations with the 
      CTDI(vol). The estimated values could be used to optimize radiation doses in the 
      CT facility. The SSDE and SSDRLs for head, chest and ABP CT examinations have 
      been developed at a teaching hospital in Ghana. The SSDEs of chest and ABP 
      examinations showed linear correlations with the CTDI(vol)and hence can be 
      calculated using the mathematically derived equations in the study.
CI  - (c) 2023 Society for Radiological Protection. Published on behalf of SRP by IOP 
      Publishing Limited. All rights reserved.
FAU - Ohene-Botwe, Benard
AU  - Ohene-Botwe B
AUID- ORCID: 0000-0002-0477-640X
AD  - Department of Midwifery and Radiography, School of Health & Psychological 
      Sciences, City, University of London, Northampton Square, London EC1V 0HB, United 
      Kingdom.
AD  - Department of Radiography, University of Ghana, Box KB 143, Korle Bu, Accra, 
      Ghana.
FAU - Anim-Sampong, Samuel
AU  - Anim-Sampong S
AUID- ORCID: 0000-0002-0371-3597
AD  - Department of Radiography, University of Ghana, Box KB 143, Korle Bu, Accra, 
      Ghana.
FAU - Nkansah, Josephine
AU  - Nkansah J
AD  - Department of Radiography, University of Ghana, Box KB 143, Korle Bu, Accra, 
      Ghana.
LA  - eng
PT  - Journal Article
DEP - 20230214
PL  - England
TA  - J Radiol Prot
JT  - Journal of radiological protection : official journal of the Society for 
      Radiological Protection
JID - 8809257
SB  - IM
MH  - Adult
MH  - Humans
MH  - Male
MH  - Female
MH  - Radiation Dosage
MH  - Ghana
MH  - Retrospective Studies
MH  - *Tomography, X-Ray Computed/methods
MH  - *Thorax
OTO - NOTNLM
OT  - antero-posterior diameter
OT  - computed tomography
OT  - dose index
OT  - effective diameter
OT  - lateral diameter
OT  - size-specific dose estimate
EDAT- 2023/01/25 06:00
MHDA- 2023/02/16 06:00
CRDT- 2023/01/24 17:22
PHST- 2022/10/07 00:00 [received]
PHST- 2023/01/24 00:00 [accepted]
PHST- 2023/01/25 06:00 [pubmed]
PHST- 2023/02/16 06:00 [medline]
PHST- 2023/01/24 17:22 [entrez]
AID - 10.1088/1361-6498/acb5aa [doi]
PST - epublish
SO  - J Radiol Prot. 2023 Feb 14;43(1). doi: 10.1088/1361-6498/acb5aa.