Study of volume resolution of prostate motion target by four-dimensional ultrasound / 中华放射肿瘤学杂志

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.

Research on application of pelvic four-dimensional ultrasound in early maternal pelvic floor dysfunction disease / 中国医学装备

Objective:To provide better clinical treatment plan by grading and classifying four-dimensional ultrasound pelvic floor dynamic imaging primiparas pelvic floor dysfunction.Methods: 270 cases with pelvic floor functional disorders (bladder prolapse) of high-risk mothers were selected, from the beginning of the median sagittal plane and three-dimensional reconstruction of the surface at rest, to observe the bladder and urethra and pelvic diaphragm hiatus and anal status under Valaslva changes in the measurement parameters (bladder neck mobility, posterior horn of bladder and urethra, rotation angle of the urethra) and its Green typing.Results: There was no statistical difference between the mode of delivery cystocele resting corresponding BSD and posterior horn of bladder and urethra (t=1.133,t=1.165;P>0.05). Under Valsalva state, there were significant differences the two groups corresponding to BSD, the bladder neck mobility, posterior horn of bladder and urethra and rotation angle of the urethra (t=2.147,t=5.628,t=3.502,t=4.396;P<0.05). The incidence rate of type II and type III in vaginal delivery group is higher than that in cesarean section group. The incidence rate of type I in vaginal delivery group is less than that in cesarean section group. The differences were statistically significant (x2=6.080,P<0.05). Conclusion: The pelvic floor dynamic four-dimensional ultrasound imaging can clearly show the situation of pelvic floor before primiparas to understand the situation of maternal mode of delivery cystocele production. It can provide a more reliable basis for early clinical diagnosis of maternal pelvic floor dysfunction.

The application of four-dimensional ultrasound imaging in obstetric examination / 中国医学装备

Objective: To explore the clinical value of four-dimensional ultrasound imaging in obstetric examination. Methods:Four-dimensional ultrasound was detected by V730 on 60 pregnant women who used ultrasonography in prenatal screening. Results:There were 60 cases in which 20 cases with limb malformation, 15 cases with facial deformity, 12 cases with spinal malformation, 8 cases with abdominal malformation, and 5 cases with chest malformation. Conclusion:Four-dimensional ultrasound can better dynamic observation of fetal surface malformations location, which can provide more worthy information for clinical diagnosis and treatment.

Prenatal ultrasonographic diagnosis of thoracoabdominal cavernous lymphangioma: A case report / 대한산부인과학회지

Lymphangiomas are congenital anomalies of the lymphatic system in which abnormal lymphatic channels are localized to form a benign mass. Lymphangiomas are classified into 3 types: simple, cavernous, and cystic (=cystic hygroma). Mixed forms may coexist. Cavernous lymphangiomas are very rare variants and characterized by penetration through the subcutaneous area between the muscular septa. Lymphangiomas are typically presented in the head, neck and axillary region, while cavernous lymphangiomas most commonly occur in the thorax or retroperitoneum. Although there are many papers about the cystic hygroma, a few cases of fetal thoracoabdominal cavernous lymphangioma have been reported. Accurate prenatal diagnosis and anatomical evaluation are important for delivery planning and prompt postnatal resuscitation. The anomaly was assessed by two dimensional (2D), three dimensional (3D), and real-time multiplanar four dimensional (4D) ultrasound. This case report confirms the usefulness of the 3D, real-time multiplanar 4D ultrasound to assess the mass extension and relationship with adjacent structures. We present a case of fetal thoracoabdominal cavernous lymphangioma diagnosed by 2D, 3D, real-time multiplanar 4D ultrasound with brief review of literatures.