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Interobserver and intraobserver agreement in the evaluation of CT perfusion in ischemic stroke

Abul-Kasim, Kasim LU ; Strombeck, Anita; Maly, Pavel LU ; Overgaard, Angelica LU ; Persson, Erik LU and Sundgren, Pia LU (2009) In Functional Neurology 24(3). p.139-145
Abstract
Knowledge of interrater reliability in the evaluation of perfusion computed tomography (CTP) studies is very limited even though the method is widely used in the workup of acute stroke. The aims of this study were to estimate the inter- and intraolbserver agreement in the evaluation of CTP data and to evaluate the feasibility of the method. The CTP data of 20 consecutive patients (50% were females) aged 68 +/- 11 years with different categories of acute ischemic stroke were included in this retrospective analysis. Perfusion studies were evaluated independently by six radiologists on two different occasions. The overall inter- and intraolbserver agreement was substantial, showing a K value of 0.65 (95% confidence interval 0.39-0.91). The... (More)
Knowledge of interrater reliability in the evaluation of perfusion computed tomography (CTP) studies is very limited even though the method is widely used in the workup of acute stroke. The aims of this study were to estimate the inter- and intraolbserver agreement in the evaluation of CTP data and to evaluate the feasibility of the method. The CTP data of 20 consecutive patients (50% were females) aged 68 +/- 11 years with different categories of acute ischemic stroke were included in this retrospective analysis. Perfusion studies were evaluated independently by six radiologists on two different occasions. The overall inter- and intraolbserver agreement was substantial, showing a K value of 0.65 (95% confidence interval 0.39-0.91). The time required for the post-processing and interpretation ranged from 37 to 460 seconds. Evaluation of manually post-processed CTP data according to the maximum slope model appears to be reliable. Experience and also a short training period increase the reliability of the method and reduce the time needed for delivery of the results to the treating clinician. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
manual post-processing, penumbra, maximum slope model, interobserver agreement, CTP, feasibility
in
Functional Neurology
volume
24
issue
3
pages
139 - 145
publisher
CIC Edizioni Internazionali
external identifiers
  • wos:000275249800005
  • scopus:77951227747
ISSN
0393-5264
language
English
LU publication?
yes
id
1014a067-85b1-4c0d-98fc-9afd4ab4f086 (old id 1586417)
date added to LUP
2010-04-28 08:22:29
date last changed
2017-01-01 06:22:31
@article{1014a067-85b1-4c0d-98fc-9afd4ab4f086,
  abstract     = {Knowledge of interrater reliability in the evaluation of perfusion computed tomography (CTP) studies is very limited even though the method is widely used in the workup of acute stroke. The aims of this study were to estimate the inter- and intraolbserver agreement in the evaluation of CTP data and to evaluate the feasibility of the method. The CTP data of 20 consecutive patients (50% were females) aged 68 +/- 11 years with different categories of acute ischemic stroke were included in this retrospective analysis. Perfusion studies were evaluated independently by six radiologists on two different occasions. The overall inter- and intraolbserver agreement was substantial, showing a K value of 0.65 (95% confidence interval 0.39-0.91). The time required for the post-processing and interpretation ranged from 37 to 460 seconds. Evaluation of manually post-processed CTP data according to the maximum slope model appears to be reliable. Experience and also a short training period increase the reliability of the method and reduce the time needed for delivery of the results to the treating clinician.},
  author       = {Abul-Kasim, Kasim and Strombeck, Anita and Maly, Pavel and Overgaard, Angelica and Persson, Erik and Sundgren, Pia},
  issn         = {0393-5264},
  keyword      = {manual post-processing,penumbra,maximum slope model,interobserver agreement,CTP,feasibility},
  language     = {eng},
  number       = {3},
  pages        = {139--145},
  publisher    = {CIC Edizioni Internazionali},
  series       = {Functional Neurology},
  title        = {Interobserver and intraobserver agreement in the evaluation of CT perfusion in ischemic stroke},
  volume       = {24},
  year         = {2009},
}