Study of volume resolution of prostate motion target by four-dimensional ultrasound
10.3760/cma.j.cn113030-20201116-00556
- VernacularTitle:四维超声对前列腺运动靶体积分辨能力的研究
- Author:
Zhengda LU
1
;
Hui BI
;
Chunying LI
;
Mu HE
;
Liugang GAO
;
Jiawei SUN
;
Kai XIE
;
Tao LIN
;
Jianfeng SUI
;
Xinye NI
Author Information
1. 南京医科大学生物医学工程与信息学院 210000
- Keywords:
Four-dimensional ultrasound;
Motion amplitude;
Motion period;
Target volume;
Prostate model
- From:
Chinese Journal of Radiation Oncology
2021;30(12):1292-1296
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the volume resolution of prostate motion target by four-dimensional (4D) ultrasound.Methods:The prostate ultrasound model was selected, and the group comparison study was conducted using 4D ultrasound to outline the prostate target under different motion amplitudes (A) and motion period (T). The simulated A value was set as 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, and 5 mm, respectively. The T value was set as 1 s, 2 s, 3 s, and 4 s, respectively. The volume of the target of the model prostate was calculated, and the static ultrasound image of the target was used as the control group to analyze the difference between two groups.Results:When the model was still, the size of the target of ultrasound was consistent with that of CT scan ( P>0.05). When the A values were 0.5 mm and 1 mm, there was no statistical difference between the volume in period 1-4 s and the volume in the target at rest (all P>0.05). When the A values were 2 mm and 3 mm, and the T values were 1 s, 2 s and 3 s there was statistical difference between the volume of target and that of of static ultrasonic target (all P<0.05). When the A value was 2 mm and the T value was 4 s, there was no statistical difference between the target volume and the static target volume ( P=0.710). The range within the group was 6.7 cm 3, and the standard deviation was 1.15 cm 3. When the A value was 3 mm and the T value was 4 s, the volume repeatability of the target was poor, and the range within the group was 14.4 cm 3; when the A values were 4 mm and 5 mm, and the T values were 1-4 s, the range within the group was 3.27-17.63 cm 3 and 6.51-21.02 cm 3, respectively. The volume repeatability of the target under each period was extremely poor, which could not meet the clinical requirements. Conclusion:4D ultrasound can provide reliable reference data for patients′ target delineation within 1-4 s of motion cycle and within 1 mm of motion amplitude, which exerts on effect upon the original position of probe.
