POSTER SECTIONS Coverpage Purpose Material and methods Results Conclusion References Personal Information

ECR 2006 / C-207

Efficacy of ECG gating for lung CT imaging in evaluating pulmonary nodule: Fundamental experiment with a newly developed pulsating cardiac phantom

Congress:

ECR 2006

Poster Number:

C-207

Type:

Scientific

Keywords:

Authors:

N. Nitta¹, M. Takahashi², R. Takazakura², Y. Nagatani², K. Murata², K. Ishimoi³, M. Kimura³; ¹Otsu, Shiga/JP, ²Otsu/JP, ³Kyoto/JP

DOI:

10.1594/ECR06/C-207

DOI-Link:

https://dx.doi.org/10.1594/ECR06/C-207

Fig. 1: These are the results of the phantom experiment. Each graph represents the...

Fig. 2: Evaluating clinical cases in LECG mode, this graph shows the relationship...

Fig. 3: This graph shows the relationship between the evaluation rate of “1:excellent...

Fig. 4: Evaluating clinical cases in CECG mode, this graph shows the relationship...

Fig. 5: This graph shows the evaluation rate of “1:exellent visibility” in CECG...

Fig. 6: These are the coronal section images of the dynamic cardiac phantom; from the...

Fig. 7: These are the coronal section images of the dynamic cardiac phantom; from the...

Fig. 8: These are the coronal section images of the dynamic cardiac phantom; from the...

Fig. 9: These are the coronal section images of the dynamic cardiac phantom; from the...

Fig. 10: These are the coronal section images of the dynamic cardiac phantom; from the...

Fig. 11: These are the coronal section images of the dynamic cardiac phantom; from the...

Fig. 12: If LECG mode images are arranged according to heart rate, improvement in image...

Results

Result 1:Phantom Study (Fig.3) (Fig.6-1,2,3,4,5,6)(Fig.7)

In the phantom study, regardless of the heart rate:

The rate evaluated as 1: exellent visibility.

- CECG-75% of RR and 30% of RR: 85-100%

- LECG: 55-78%

-CECG-50%RR: 50-80%

-NSC: 45-58%

Result 2: Clinical Cases

-Clinical Cases 1 (Fig.4-1, Fig.4-2)

In the comparison between LECG and NSC:

-LECG better than NSC: 57%, 137/240 nodules.

-More than three radiologists: 58%, 28/48 nodules.

-More than four radiologists: 38%, 18/48 nodules.

-Clinical Cases 2 (Fig.5-1, Fig5-2)

In clinical cases the comparison between CECG and NSC.

-NSC best in 37%, 55/150 nodules.

-CECG-70%RR best in 31%, 47/150 nodules.

-CECG-40%RR best in 32%, 48/150 nodules.

-More than four radiologists: 10%, 3/30 nodules in CECG.