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Review of failed CT phantom image evaluations in 2005 and 2006 by the CT accreditation program of the Korean Institute for Accreditation of Medical Image.

Park HJ, Jung SE, Lee YJ, Cho WI, Do KH, Kim SH, Na DG - Korean J Radiol (2008 Jul-Aug)

Bottom Line: The failed cases in terms of image uniformity and the CT number of water decreased in 2006.In 2006, the proportion of CT scanners manufactured before 1995 decreased (from 12.9% to 9.3%).The continued progress in the CT accreditation program may achieve improved image quality and thereby improve the national health of Korea.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.

ABSTRACT

Objective: The CT accreditation program was established in 2004 by the Korean Institute for Accreditation of Medical Image (KIAMI) to confirm that there was proper quality assurance of computed tomography (CT) images. We reviewed all the failed CT phantom image evaluations performed in 2005 and 2006.

Materials and methods: We analyzed 604 failed CT phantom image evaluations according to the type of evaluation, the size of the medical institution, the parameters of the phantom image testing and the manufacturing date of the CT scanners.

Results: The failure rates were 10.5% and 21.6% in 2005 and 2006, respectively. Spatial resolution was the most frequently failed parameter for the CT phantom image evaluations in both years (50.5% and 49%, respectively). The proportion of cases with artifacts increased in 2006 (from 4.5% to 37.8%). The failed cases in terms of image uniformity and the CT number of water decreased in 2006. The failure rate in general hospitals was lower than at other sites. In 2006, the proportion of CT scanners manufactured before 1995 decreased (from 12.9% to 9.3%).

Conclusion: The continued progress in the CT accreditation program may achieve improved image quality and thereby improve the national health of Korea.

Show MeSH
Types of CT phantom image evaluation and failure rates in 2005 and 2006. Document evaluation was most frequent type of phantom image evaluation during this two-year period. In 2006, total failure rate doubled relative to that in 2005. Difference in failure rates between 2005 and 2006 was more than twice that for close evaluation and repeated evaluation, although it was almost twice or less than twice that of other types of evaluation (see line graph). Failure rates of close evaluation and repeated evaluation were higher.
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Figure 2: Types of CT phantom image evaluation and failure rates in 2005 and 2006. Document evaluation was most frequent type of phantom image evaluation during this two-year period. In 2006, total failure rate doubled relative to that in 2005. Difference in failure rates between 2005 and 2006 was more than twice that for close evaluation and repeated evaluation, although it was almost twice or less than twice that of other types of evaluation (see line graph). Failure rates of close evaluation and repeated evaluation were higher.

Mentions: The document evaluation, which contained the phantom image evaluation, was the most frequent type of CT accreditation program performed during the two-year period. Compared with 2005, the total failure rate doubled in 2006 (10.5% to 21.6%, p = 0.000), and the failure rate of the document evaluation also approximately doubled in 2006 (9.5% to 18.4%, p = 0.000). Furthermore, the failure rate of the close evaluation (2.2% to 21.7%) and repeated evaluation (17.1% to 37.7%) increased more than the other test types in 2006 (Fig. 2).


Review of failed CT phantom image evaluations in 2005 and 2006 by the CT accreditation program of the Korean Institute for Accreditation of Medical Image.

Park HJ, Jung SE, Lee YJ, Cho WI, Do KH, Kim SH, Na DG - Korean J Radiol (2008 Jul-Aug)

Types of CT phantom image evaluation and failure rates in 2005 and 2006. Document evaluation was most frequent type of phantom image evaluation during this two-year period. In 2006, total failure rate doubled relative to that in 2005. Difference in failure rates between 2005 and 2006 was more than twice that for close evaluation and repeated evaluation, although it was almost twice or less than twice that of other types of evaluation (see line graph). Failure rates of close evaluation and repeated evaluation were higher.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2627278&req=5

Figure 2: Types of CT phantom image evaluation and failure rates in 2005 and 2006. Document evaluation was most frequent type of phantom image evaluation during this two-year period. In 2006, total failure rate doubled relative to that in 2005. Difference in failure rates between 2005 and 2006 was more than twice that for close evaluation and repeated evaluation, although it was almost twice or less than twice that of other types of evaluation (see line graph). Failure rates of close evaluation and repeated evaluation were higher.
Mentions: The document evaluation, which contained the phantom image evaluation, was the most frequent type of CT accreditation program performed during the two-year period. Compared with 2005, the total failure rate doubled in 2006 (10.5% to 21.6%, p = 0.000), and the failure rate of the document evaluation also approximately doubled in 2006 (9.5% to 18.4%, p = 0.000). Furthermore, the failure rate of the close evaluation (2.2% to 21.7%) and repeated evaluation (17.1% to 37.7%) increased more than the other test types in 2006 (Fig. 2).

Bottom Line: The failed cases in terms of image uniformity and the CT number of water decreased in 2006.In 2006, the proportion of CT scanners manufactured before 1995 decreased (from 12.9% to 9.3%).The continued progress in the CT accreditation program may achieve improved image quality and thereby improve the national health of Korea.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.

ABSTRACT

Objective: The CT accreditation program was established in 2004 by the Korean Institute for Accreditation of Medical Image (KIAMI) to confirm that there was proper quality assurance of computed tomography (CT) images. We reviewed all the failed CT phantom image evaluations performed in 2005 and 2006.

Materials and methods: We analyzed 604 failed CT phantom image evaluations according to the type of evaluation, the size of the medical institution, the parameters of the phantom image testing and the manufacturing date of the CT scanners.

Results: The failure rates were 10.5% and 21.6% in 2005 and 2006, respectively. Spatial resolution was the most frequently failed parameter for the CT phantom image evaluations in both years (50.5% and 49%, respectively). The proportion of cases with artifacts increased in 2006 (from 4.5% to 37.8%). The failed cases in terms of image uniformity and the CT number of water decreased in 2006. The failure rate in general hospitals was lower than at other sites. In 2006, the proportion of CT scanners manufactured before 1995 decreased (from 12.9% to 9.3%).

Conclusion: The continued progress in the CT accreditation program may achieve improved image quality and thereby improve the national health of Korea.

Show MeSH