|
KMID : 0357520190420060435
|
|
Journal of Radiological Science and Technology
2019 Volume.42 No. 6 p.435 ~ p.440
|
|
|
Study on the Accuracy of Vessel Measurement According to Table Object Distance Changes
|
|
Kim Seung-Gi
|
|
|
Abstract
|
|
|
|
This is to study the accuracy of the actual size according to the TOD(table object distance; TOD) change when measuring blood vessels using angiography equipment, and to help the optimal selection of the device used accordingly. Balls similar to the size of common vessels were calibrated with TOD using 30 ㎜, 20 ㎜, 10 ㎜, 5 ㎜ and acrylic phantoms, catheter calibration from 0 ㎝ to 10 ㎝, 20 ㎝ and 30 ㎝, respectively. It was measured whether there was a change in the measured value according to the change. The equipment used was GE Innova 3131 IQ equipment, and the image reconstruction method was GE AW4.7 post processing program. Two radiotechnologists were scanned three times by catheter calibration method and 3DRA(3dimension rotational angiography; 3DRA) volume rendering method. The independent sample T-test showed 0.981 (p> 0.05) to verify the significance between the two observers. As a result, in case of catheter calibration, the error rate at TOD 0 ㎜ and 10 ㎜ is within ± 10%, but when the TOD is changed to 20 ㎜ and 50 ㎜ respectively, the tolerance is ± 10% except for 30 ㎜ ball exceeded. On the other hand, 3DRA was included within the tolerance range of ± 10% overall even when the TOD was changed from 0 ㎜ to 50 ㎜. In the catheter calibration method, the larger the TOD, the larger the error range, and the 3DRA method was able to measure vascular vessels accurately close to the actual measurement without any consideration of the TOD.
|
|
|
KEYWORD
|
|
|
3dimension rotational angiography, Catheter calibration, Volume rendering, Table object distance, Vascular measurement
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|