1. Moo seok Lee Department of nuclear medicine, Pusan University Hospital
Use of blood pool half body scan in three phase bone in Patients with R/O RSDS (Reflex Sympathetic Dystrophy Sydrome)
Moo seok Lee
Department of nuclear medicine, Pusan University Hospital

2. Contents 1
Purpose 2
Materials and Method 3
Results 4
Conclusion

3. What is Reflex Sympathetic Dystrophy Syndrome?
Purpose
What is Reflex Sympathetic Dystrophy Syndrome?
CRPS (Complex Regional Pain Syndrome) Stage I
RSDS is a multi-symptom, multi-system, syndrome usually affecting one or more extremities

4. Purpose Flow Blood pool delay R L
Three phase bone scan of an 76-year- old with RSD

5. Materials and Method Patients Group Period
From October to September 2009
15 patients (Male 8, Female 7, mean age:67.2)
Number
R/O RSD patients
in reguest comment(OCS)
Group

6. Quantitative Analysis
Materials and Method
SCAN
Flow : immediately (60 frame, 1sec/frame)
Blood pool: 2~4min after injection
(20 kcnts)
additional half body scan
Delay: 3hrs after injection
Quantitative Analysis
ROI (right/left count ratio)
Count ratio of Bilateral Hands (Flow, Blood pool, Delay)
; included an ipsilateral wrist
Count ratio of Bilateral Shoulders (Blood pool, Delay)
Compared to the count ratios of shoulders in the blood pool

7. Materials and Method
Half body scan (blood pool)
WB body scan (delay)
The uptake Overall increase in unilateral limbs joint (Flow, Blood pool, Delay)

8. Materials and Method Half body scan (blood pool) WB body scan (delay)
Count ratio(right/left) of bilateral shoulders by drawing a ROI in the half body and whole body image. The each ROI is equal in size.

9. Materials and Method Flow Blood pool Delay
Count ratio(right/left) of bilateral hands by drawing a ROI in the three phase images.
The Flow image was compressed every frame. The each ROI is equal in size.

10. Results Right/Left Ratio Flow Blood pool Delay Hands Shoulders
1.09±0.53
1.13±0.47
1.08±0.26
1.24±0.75
1.11±0.31
The values are Mean±SD.
Spearman's R, SPSS 12.0

11. Results R=0.895 R=0.886 R=0.855 R=0.754 Hands(Flow) Hands(Blood pool)
Shoulders(blood pool)
Shoulders(blood pool)
Hands(Delay)
Shoulder(Delay)
R=0.855
R=0.754
Shoulders(blood pool)
Shoulders(blood pool)

12. Results
False negative L R L R

13. Results
False positive R L R L

14. Conclusion
Diagnosis
Half body scan
Besides,
Half body scan can lower false negative and false positive
Existing Scan
Only local lesion included in three phase bone scan
Half body scan in the blood pool image is helpful in the diagnosis of RSDS

15. Thank you!!