1. The Accuracy of the Table Movement During A Whole Body Scan
Department of Nuclear Medicine, Asan Medical Center, Seoul , Korea
Ju Young Lee

2. Contents
Introduction
Purpose
Material and Methods
Results
Conclusions

3. Introduction
Whole body scan is very basic method and a lot of study needs whole body scan.
Scan Speed is a key parameter and we usually pre-set less than 10 ~ 20 cm/min.
In these days, half time whole body acquisition methods are released and some centers are generally used.
Especially, the accuracy of table movement is more important in half time acquisition, because it related with image directly.

4. Purpose The Accuracy of Table Movement Operating period
of Gamma Camera
: ECAM plus (installed 2000),
SYMBIA T2 (installed 2008)
Difference of Weight
: 0, 66, 110kg
The Accuracy
of Table Movement

5. Material and Methods Dec. 2008 ~ Feb. 2009
Term
Dec ~ Feb. 2009
(Nuclear Medicine of Asan Medical Center)
Object
2 Gamma Camera
(ECAM plus, SYMBIA T2)
Materials
Ruler, Timer, Lead brick

6. Material and Methods The difference of Accuracy in old and new Cameras
Gamma Camera : ECAM plus
(installed in 2000),
SYMBIA T2
(installed in 2008)
2. Scan Speed : 10, 15, 30cm/min
Calculate table movement time per 10cm (total 100cm)
Each Condition was repeated
10 times

7. Material and Methods The difference of Accuracy by Weight
Weight : 0, 66, 110kg
2. Scan Speed : 10, 15, 30cm/min
Calculation of table movement time per 10cm (total 100cm)
Each Condition was repeated 10 times
The difference of Accuracy by Weight

8. Analysis Age of Gamma Camera Mood’s Median Test
: Chi-Square, p-value
I-MR(Indivisual – Moving Range)
Difference of Weight
Mean, SD(Standard Deviation)
I-MR(Indivisual – Moving Range)

9. Results Mood’s Median Test of ECAM plus and SYMBIA T2 60.1 ± 0.74 2
Scan Speed
(cm/min) N
Mean±SD DF X2 p 10
270
60.1 ± 0.74 2
1.40
0.497
ECAM plus 15
40.0 ± 0.57 2
1.37
0.505 30
20.0 ± 0.40 2
0.27
0.872 10 10
60.0 ± 0.74 2
5.08
0.079
0.079
SYMBIA T2 15
40.0 ± 0.73 2
0.59
0.746 30
20.0 ± 0.45 2
1.28
0.528

10. Results I-MR(Indivisual – Moving Range) Control Chart
of Table Movement (10 cm/min) in each Camera
ECAM plus 10cm/min
9 / 270 (3.33%)
SYMBIA T2 10cm/min
5 / 270 (1.85%)

11. Results I-MR(Indivisual – Moving Range) Control Chart
of Table Movement (15 cm/min) in each Camera
1 / 270 (0.37%)
ECAM plus 15cm/min
5 / 270 (1.85%)
SYMBIA T2 15cm/min 11

12. Results I-MR(Indivisual – Moving Range) Control Chart
of Table Movement (30cm/min) in each Camera
44 / 270 (16.30%)
ECAM plus 30cm/min
22 / 270 (8.15%)
SYMBIA T2 30cm/min 12

13. Results Difference of the Weight Scan Speed (cm/ min) Mean ± SD weight
0 kg 30 10
60.1 ± 0.58 15
39.9 ± 0.58
20.0 ± 0.41
66 kg 10
60.1 ± 0.79 15
39.9 ± 0.69 30
20.0 ± 0.45
110 kg 10
60.1 ± 0.82 15
40.0 ± 0.69 30
20.0 ± 0.43

14. Results Difference of the Weight Scan Speed (cm/ min) Mean ± SD weight
0 kg 30 10
60.1 ± 0.58 15
39.9 ± 0.58
20.0 ± 0.41
66 kg 10
60.1 ± 0.79 15
39.9 ± 0.69 30
20.0 ± 0.45
110 kg 10
60.1 ± 0.82 15
40.0 ± 0.69 30
20.0 ± 0.43

15. Results Difference of the Weight Scan Speed (cm/ min) Mean ± SD weight
0 kg 30 10
60.1 ± 0.58 15
39.9 ± 0.58
20.0 ± 0.41
66 kg 10
60.1 ± 0.79 15
39.9 ± 0.69 30
20.0 ± 0.45
110 kg 10
60.1 ± 0.82 15
40.0 ± 0.69 30
20.0 ± 0.43

16. Results I-MR(Indivisual – Moving Range) Control Chart of Weight (0 kg)
3 / 180 (1.67%)
10cm/min
30cm/min
15cm/min
2 / 180 (1.11%)
31 / 180 (17.22%) 16

17. Results I-MR(Indivisual – Moving Range) Control Chart
of Weight (66 kg)
2 / 180 (1.11%)
0 / 180 (0%)
10cm/min
30cm/min
15cm/min 17

18. Results I-MR(Indivisual – Moving Range) Control Chart
of Weight (110 kg)
4 / 180 (2.22%)
2 / 180 (1.11%)
33 / 180 (18.33%)
10cm/min
30cm/min
15cm/min 18

19. Conclusions
No statistically significant difference both ECAM plus and SYMBIA T2.
However, as the table movement speed were increased, the difference of movement interval showed a little bit changed.
Also, as the weight were increased, the difference of movement interval showed a little bit changed.

20. Conclusions We must check. - Table Movement
- Scan Speed
- Condition of each Gamma Camera
Regardless of operating period of the Gamma camera,
we must check routinely and more take care of it.
Generalization of follow up checking.
Before,
The adoption
of Half time
Whole body scan

21. Thank you for your attention
Department of Nuclear Medicine, Asan Medical Center, Seoul , Korea