PMID- 32887765
OWN - NLM
STAT- MEDLINE
DCOM- 20211125
LR  - 20211125
IS  - 1535-5675 (Electronic)
IS  - 0091-4916 (Linking)
VI  - 49
IP  - 1
DP  - 2021 Mar
TI  - Influence of a Headrest on Reconstruction and Attenuation Correction of Human 
      Brain SPECT Images.
PG  - 54-57
LID - 10.2967/jnmt.120.244731 [doi]
AB  - Previous reports suggest that a headrest significantly influences anterior and 
      posterior cerebral blood flow. The present study aimed to clarify the influence 
      of a headrest on reconstruction and attenuation correction (AC) of brain SPECT 
      images. Methods: We evaluated the influence on cerebral blood flow in the 
      anterior region (brain segments A + B), middle region (segments D + F), and 
      posterior region (segment G) of the brain using filtered backprojection-AC based 
      on the method of Chang (FBP-ChangAC), ordered-subset expectation 
      maximization-ChangAC (OSEM-ChangAC), OSEM CT-based AC (OSEM-CTAC), and OSEM with 
      no attenuation correction (OSEM-NoAC) with and without a headrest. The subjects 
      were 17 healthy volunteers who underwent (99m)Tc-ECD SPECT. We compared the A + 
      B/G and the D + F/G ratios of (99m)Tc-ECD SPECT images in each group. Results: 
      For FBP-ChangAC, OSEM-ChangAC, and OSEM-NoAC, there were significant differences 
      in A + B/G ratio between images obtained with a headrest and those obtained 
      without. On the other hand, for OSEM-CTAC, there were no significant differences 
      in A + B/G ratio regardless of whether a headrest was used. For FBP-ChangAC and 
      OSEM-NoAC, there were significant differences in D + F/G ratio between images 
      with a headrest and those without. For OSEM-CTAC and OSEM-ChangAC, there were no 
      significant differences in D + F/G ratio regardless of whether a headrest was 
      used. Conclusion: The influence of a headrest on image reconstruction and AC 
      should be considered if FBP-ChangAC, OSEM-ChangAC, or OSEM-NoAC is used but not 
      if OSEM-CTAC is used.
CI  - (c) 2021 by the Society of Nuclear Medicine and Molecular Imaging.
FAU - Ohba, Makoto
AU  - Ohba M
AD  - Department of Radiology, Yamagata University Hospital, Yamagata, Japan.
FAU - Kokubo, Yasuaki
AU  - Kokubo Y
AD  - Department of Neurosurgery, Faculty of Medicine, Yamagata University, Yamagata, 
      Japan; and ykokubo@med.id.yamagata-u.ac.jp.
FAU - Suzuki, Koji
AU  - Suzuki K
AD  - Department of Radiology, Yamagata University Hospital, Yamagata, Japan.
FAU - Kanoto, Masafumi
AU  - Kanoto M
AD  - Division of Diagnostic Radiology, Department of Radiology, Yamagata University 
      Graduate School of Medical Science, Yamagata, Japan.
FAU - Sonoda, Yukihiko
AU  - Sonoda Y
AD  - Department of Neurosurgery, Faculty of Medicine, Yamagata University, Yamagata, 
      Japan; and.
LA  - eng
PT  - Journal Article
DEP - 20200904
PL  - United States
TA  - J Nucl Med Technol
JT  - Journal of nuclear medicine technology
JID - 0430303
RN  - 0 (Anticoagulants)
SB  - IM
MH  - Algorithms
MH  - *Anticoagulants
MH  - Brain/diagnostic imaging
MH  - Cerebrovascular Circulation
MH  - Humans
MH  - Image Processing, Computer-Assisted
MH  - Phantoms, Imaging
MH  - *Tomography, Emission-Computed, Single-Photon
OTO - NOTNLM
OT  - CT-based attenuation correction
OT  - ChangAC
OT  - SPECT
OT  - headrest
OT  - image reconstruction
EDAT- 2020/09/06 06:00
MHDA- 2021/11/26 06:00
CRDT- 2020/09/05 05:16
PHST- 2020/03/09 00:00 [received]
PHST- 2020/07/25 00:00 [accepted]
PHST- 2020/09/06 06:00 [pubmed]
PHST- 2021/11/26 06:00 [medline]
PHST- 2020/09/05 05:16 [entrez]
AID - jnmt.120.244731 [pii]
AID - 10.2967/jnmt.120.244731 [doi]
PST - ppublish
SO  - J Nucl Med Technol. 2021 Mar;49(1):54-57. doi: 10.2967/jnmt.120.244731. Epub 2020 
      Sep 4.