PMID- 28402125
OWN - NLM
STAT- MEDLINE
DCOM- 20170619
LR  - 20181113
IS  - 1748-880X (Electronic)
IS  - 0007-1285 (Print)
IS  - 0007-1285 (Linking)
VI  - 90
IP  - 1074
DP  - 2017 Jun
TI  - Assessment of radiation dose from abdominal quantitative CT with short scan 
      length.
PG  - 20160931
LID - 10.1259/bjr.20160931 [doi]
LID - 20160931
AB  - OBJECTIVE: To assess radiation dose for patients who received abdominal 
      quantitative CT and to compare the midpoint dose [D(L)(0)] at the centre of a 
      1-cm scan length with the volume CT dose index (CTDI(vol)). Although the 
      size-specific dose estimate (SSDE) proposed in The American Association of 
      Physicists in Medicine Report No. 204 is not applicable for short-length scans, 
      commercial dose-monitoring software, such as Radimetrics() Enterprise Platform 
      (Bayer HealthCare, Whippany, NJ), reports SSDE for all scans. SSDE was herein 
      compared with D(L)(0). METHODS: Data were analyzed from 398 abdominal 
      quantitative CT examinations in 165 males and 233 females. The CTDI(vol) was 
      4.66 mGy, and the scan length was 1 cm for all examinations. Radimetrics was used 
      to extract patient diameter and SSDE. D(L)(0) was assessed using a previously 
      reported method that takes into account both patient size and scan length. 
      RESULTS: The mean patient diameter was 28.5 +/- 6.3 cm (range, 16.5-46.6 cm); the 
      mean SSDE was 6.22 +/- 1.36 mGy (range, 3.12-9.42 mGy); and the mean D(L)(0) was 
      2.97 +/- 0.95 mGy (range, 1.18-5.77 mGy). As patient diameter increased, the 
      D(L)(0) to CTDI(vol) ratio decreased, ranging from 1.24 to 0.25; the D(L)(0) to 
      SSDE ratio also decreased, ranging from 0.61 to 0.38. CONCLUSION: The dose to the 
      patients from abdominal quantitative CT may be largely different from CTDI(vol) 
      and SSDE. This study demonstrates the necessity of taking into account not only 
      patient size but also scan length for evaluating the dose from short-length 
      scans. Advances in knowledge: In CT examinations with 1-cm scan length, dose 
      evaluation needs to take into account both patient size and scan length. An 
      omission of either factor can result in an erroneous result.
FAU - Li, Xinhua
AU  - Li X
AD  - Division of Diagnostic Imaging Physics, Department of Radiology, Massachusetts 
      General Hospital, Harvard Medical School, Boston, MA, USA.
FAU - Yang, Kai
AU  - Yang K
AD  - Division of Diagnostic Imaging Physics, Department of Radiology, Massachusetts 
      General Hospital, Harvard Medical School, Boston, MA, USA.
FAU - DeLorenzo, Matthew C
AU  - DeLorenzo MC
AD  - Division of Diagnostic Imaging Physics, Department of Radiology, Massachusetts 
      General Hospital, Harvard Medical School, Boston, MA, USA.
FAU - Liu, Bob
AU  - Liu B
AD  - Division of Diagnostic Imaging Physics, Department of Radiology, Massachusetts 
      General Hospital, Harvard Medical School, Boston, MA, USA.
LA  - eng
PT  - Journal Article
DEP - 20170523
PL  - England
TA  - Br J Radiol
JT  - The British journal of radiology
JID - 0373125
SB  - IM
MH  - Adult
MH  - Aged
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Radiation Dosage
MH  - Radiography, Abdominal/*methods
MH  - Radiometry
MH  - Software
MH  - Time Factors
MH  - Tomography, X-Ray Computed/*methods
PMC - PMC5602182
EDAT- 2017/04/13 06:00
MHDA- 2017/06/20 06:00
PMCR- 2018/06/01
CRDT- 2017/04/13 06:00
PHST- 2017/04/13 06:00 [pubmed]
PHST- 2017/06/20 06:00 [medline]
PHST- 2017/04/13 06:00 [entrez]
PHST- 2018/06/01 00:00 [pmc-release]
AID - 10.1259/bjr.20160931 [doi]
PST - ppublish
SO  - Br J Radiol. 2017 Jun;90(1074):20160931. doi: 10.1259/bjr.20160931. Epub 2017 May 
      23.